RULES FOR
CLASSIFICATION OF
SHIPS
NEWBUILDINGS
SPECIAL EQUIPMENT AND SYSTEMS
ADDITIONAL CLASS
PART 6 CHAPTER 3
PERIODICALLY UNATTENDED
MACHINERY SPACE
JANUARY 2002
CONTENTS
Sec.
Sec.
Sec.
Sec.
Sec.
1
2
3
4
5
PAGE
General Requirements ................................................................................................................ 5
System Arrangement .................................................................................................................. 7
Class Notation E0 ...................................................................................................................... 10
Class Notation ECO ................................................................................................................... 18
Survey....................................................................................................................................... 19
DET NORSKE VERITAS
Veritasveien 1, N-1322 Høvik, Norway Tel.: +47 67 57 99 00 Fax: +47 67 57 99 11
CHANGES IN THE RULES
General
The present edition of the rules includes additions and amendments
decided by the Board in December 2001, and supersedes the January
1999 edition of the same chapter.
The rule changes come into force on 1 July 2002.
This chapter is valid until superseded by a revised chapter. Supplements will not be issued except for an updated list of minor amendments and corrections presented in Pt.0 Ch.1 Sec.3. Pt.0 Ch.1 is
normally revised in January and July each year.
Revised chapters will be forwarded to all subscribers to the rules.
Buyers of reprints are advised to check the updated list of rule chapters printed in Pt.0 Ch.1 Sec.1 to ensure that the chapter is current.
Main changes
•
Sec.1 General Requirements
—
—
—
—
A Guidance note has been added to item A203.
A new sub-section called “B. Definitions” has been added.
Previous sub-section B has been renamed C.
Previous Table B1 has been deleted and a revised Table C1 added.
— Previous sub-section C has been renamed D.
— Item D102 has been amended to include “control, alarm and safety” components and systems.
•
Sec.2 System Arrangement
— New items C101 and C102 have been added concerning main
and sub alarm systems.
— Previous item C101 has been renumbered as C103.
— Additional text and Guidance notes, concerning standby power
supplies, have been added to item C103.
— Previous item C102 has been renumbered as C104.
— Item C104 has been amended and a guidance note added.
— The Guidance notes to items C203 and C204 have been revised
and included as one Guidance note under item C203.
— A new item C205 has been added concerning total power failure
to the bridge system.
— The title of sub-section C300 has been amended from “Alarm
system in the accommodation” to read “Alarm system in the engineers’ accommodation”.
— The text in item C301 has been amended concerning the engineer’s watch call system.
— New item C302 has been added concerning activation of the engineers' watch call system by the watch responsibility transfer
system.
— A new sub-section called “C400 Watch responsibility transfer
system” (items 401 to 405) has been added.
— Sub-section E has been renamed “Fire Safety and Fire Detection
and Alarm System”.
— Items E101 and E102 have been deleted and replaced with SOLAS reg. II-2/14.1 and SOLAS reg. II-2/14.2, respectively.
— Item E103 has been completely rewritten.
— Item E104 has been completely rewritten and includes a Guidance note giving reference to SOLAS chapter II-2.
— A new item E105 has been added concerning the starting of fire
pumps according to Pt.4 Ch.10 Sec.2.
•
Sec.3 Class Notation E0
— In item B102 the last two bullet points have been amended regarding failure in remote control systems.
— New items B103 and B104 have been added concerning restart
after blackout.
— A Guidance note has been added to Item D101 concerning the
composition of a generating set.
— References have been added to item E101.
— A new item E102 has been added regarding the starting of fire
pumps.
— In item F101, text regarding main engine and electrical power
generating plant has been deleted and replaced by a reference to
main and auxiliary engines.
— In item F201 the requirements for indicators are deleted.
— In item F501, the previous text has been replaced by new text and
a Guidance note added concerning the arrangement of fire detectors.
— Table A1 and Table A2 have been deleted.
— A new Table A1 has been added, which covers the requirements
of previous Tables A1 and A2. Additionally, engines with power
greater than 500 kW/cylinder for the exhaust gas temperature after each cylinder (IACS M35 Rev.4 1999), has been replaced by
engines with power greater than 130 kW/cylinder (non-IACS). A
new footnote 7 applies.
— Table A3 has been renumbered to Table A2.
— Table A4 has been renumbered to Table A3.
— Table A5 has been renumbered to Table A4 and additional text
added to the footnote.
— Table A6 has been renumbered to Table A5 with amendments
under Diesel engines.
— Table A7 has been renumbered to Table A6.
— Table A8 has been renumbered to Table A7.
— Table A9 has been renumbered to Table A8.
•
Sec.4 Class Notation ECO
— New text has been added to item B102 concerning arrangement
of control stations and additional control positions.
•
Sec.5 Survey
— Item A201 has been expanded significantly to cover alternative
arrangements for system calibration.
— A new item A404 has been added concerning the starting of propulsion machinery from the bridge.
— Item A501 has been rewritten in accordance with SOLAS reg. II2/14.3 (testing of fire alarm system after installation). A Guidance note has also been added.
Corrections and Clarifications
In addition to the above stated rule amendments, a number of detected
errors, corrections and clarifications have been made to the existing
rule text.
Comments to the rules may be sent by e-mail to [email protected]
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Rules for Ships, January 2002
Pt.6 Ch.3 Contents – Page 3
CONTENTS
SEC. 1 GENERAL REQUIREMENTS .......................... 5
D. Electric Power Supply ....................................................... 10
A. Classification..........................................................................5
D 100
D 200
A 100
A 200
E. Fire Safety ........................................................................... 11
Application........................................................................5
Class notations ..................................................................5
E 100
B. Definitions ..............................................................................5
B 100
...........................................................................................5
C. Documentation ......................................................................6
C 100
Plans and particulars .........................................................6
D. Operation and maintenance manuals .................................6
D 100
General ..............................................................................6
SEC. 2 SYSTEM ARRANGEMENT .............................. 7
A. General...................................................................................7
A 100
Extent of automation.........................................................7
B. Automatic Control System ...................................................7
B 100
B 200
Main source.....................................................................10
Secondary distribution systems.......................................10
General............................................................................11
F. Special Requirements for Ships less than 300 Gross
Tonnage with Propulsive Output less than 1000 kW per
Engine.................................................................................. 11
F
F
F
F
F
100
200
300
400
500
Extent of monitoring .......................................................11
Arrangement on the bridge .............................................11
Electric Power Supply.....................................................11
Fire safety........................................................................11
Fire alarm system............................................................11
SEC. 4 CLASS NOTATION ECO ................................. 18
A. General Requirements ....................................................... 18
A 100
Application......................................................................18
General ..............................................................................7
Special requirements .........................................................7
B. Control Station ................................................................... 18
C. Alarm System ........................................................................7
C. System Arrangement ......................................................... 18
C
C
C
C
C
C
C
C
C
100
200
300
400
General ..............................................................................7
Alarm system on the bridge ..............................................7
Alarm system in the engineers’ accommodation ..............7
Watch responsibility transfer system ................................8
D. Safety System.........................................................................8
D
D
D
D
100
200
300
400
D 500
D 600
General ..............................................................................8
Automatic start of pumps..................................................8
Automatic start/connection of diesel generator units........8
Automatic stop of auxiliary engines and propulsion
machinery..........................................................................8
Automatic stop of oil fired auxiliary boilers.....................9
Internal communication ....................................................9
B 100
100
200
300
400
500
Arrangement ...................................................................18
General............................................................................18
Alarm system ..................................................................18
Safety system ..................................................................18
Remote control system....................................................18
Fire alarm system............................................................18
D. Extent of Monitoring.......................................................... 18
D 100
General............................................................................18
SEC. 5 SURVEY ............................................................. 19
A. General ................................................................................ 19
SEC. 3 CLASS NOTATION E0 ..................................... 10
A
A
A
A
A
A
A. Extent of Monitoring ..........................................................10
B. Testing of Remote Control System. Guidance................. 19
A 100
A 200
B 100
B 200
B 300
E. Fire Safety and Fire Detection and Alarm System ............9
E 100
General ..............................................................................9
General ............................................................................10
Safety actions ..................................................................10
100
200
300
400
500
600
Trials ..............................................................................19
Monitoring system ..........................................................19
Automatic control systems..............................................19
Electric power generating system ...................................19
Fire alarm system............................................................19
Remote control system....................................................19
Ships with fixed pitch propeller......................................19
Ships with controllable pitch propeller ...........................20
Steam turbine ships .........................................................20
B. Arrangement on the Bridge ...............................................10
B 100
General ............................................................................10
C. Arrangement in the Engine Room.....................................10
C 100
General ............................................................................10
C. Testing of Boiler Plant. Guidance..................................... 20
C 100
C 200
C 300
Automatic control system for auxiliary boilers ..............20
Automatic control system for main boilers.....................20
Monitoring system ..........................................................21
DET NORSKE VERITAS
Rules for Ships, January 2002
Pt.6 Ch.3 Contents – Page 4
DET NORSKE VERITAS
Rules for Ships, January 2002
Pt.6 Ch.3 Sec.1 – Page 5
SECTION 1
GENERAL REQUIREMENTS
A. Classification
A 100
be sufficient for the tests specified in the maintenance and testing
program.
Application
101 The rules in this chapter apply to machinery spaces
where arrangements are provided to ensure that the safety of
the ship in all sailing conditions, including manoeuvring, and
when alongside the quay, is equivalent to that of a ship having
machinery spaces attended.
Cargo handling is not included.
A 200
Class notations
201 When all machinery and auxiliary systems in the engine
room, necessary for the performance of the main functions, as
specified in Pt.1 Ch.1 Sec.2, are fitted with instrumentation
and automation equipment in compliance with the requirements of Pt.4 Ch.9 and the relevant sections of this chapter,
class notations E0 or ECO may be granted.
202 Class notation E0 which is considered to meet the regulations of the International Convention for the Safety of Life at
Sea (SOLAS) for unattended machinery spaces is granted
when alarms, required for E0 in this chapter, are relayed to the
bridge and the engineers' accommodation, and a bridge control
system for the main propulsion machinery, arranged as specified in Pt.4 Ch.1 Sec.4, and a watch responsibility transfer system are fitted.
203 Class notation ECO which is considered to meet the regulations of the International Convention for the Safety of Life
at Sea (SOLAS) for continuous supervision from a control station is granted when alarms, required for ECO in this chapter,
are initiated in an attended centralised control station, and a remote control system for the main propulsion machinery is installed at this station.
Guidance note:
It is not required for class notation ECO to have remote control,
from the bridge, of main propulsion machinery or any safety
functions installed in the engine room other than those required
by 1A1.
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204 The assignment of class notations E0 and ECO is based
on the assumptions that:
— engineering staff can attend the machinery space at short
notice
— systematic maintenance and functional testing of instrumentation are performed and documented and necessary
test equipment is kept on board
— maintenance and testing programs are approved and that a
copy stamped by the Society for identification is kept onboard and presented at annual and complete periodical surveys, as specified in Pt.7 Ch.2 Sec.4.
Guidance note:
When considering to what extent availability of spare parts, design and level of redundancy or manual operation facilities
should be arranged for, due regard should be taken to the manning level in order to ascertain continuity of operation upon failure of the instrumentation equipment.
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Guidance note:
Normally testing equipment for temperature and pressure simulation should be available onboard. The testing equipment should
A temperature bath up to 120°C and pressure simulator ranging
0 to 40 bar will be sufficient. For sensors with set point outside
these values it is acceptable to test with set points within the
above values if in addition they are checked with respect to linearity.
The test equipment should be calibrated regularly, at least annually. Calibration of ship's test equipment may be carried out on
board by comparison with a portable "master calibrating kit"
which has been brought on board, and in turn has a valid calibration status. The ship's personnel may carry out the calibration and
the ship's personnel may sign the documentation of the calibration.
Alternatively, when the surveyor has good reason to believe the
test equipment has been calibrated but no evidence thereof can be
obtained onboard, a written statement from the Captain or Chief
Engineer confirming that the test equipment has been calibrated
should be obtained and kept together with the survey documentation in the office files.
Alternatively, consideration may be given to referring to a secondary source as a verification of the primary source. In this case
a record of the numerical values of the different test equipment
should be kept together with the survey documentation in the office files.
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B. Definitions
B 100
101 Alarm is for warning of an abnormal condition and is a
combined visual and audible signal, where the audible part
calls the attention of personnel, and the visual part serves to
identify the abnormal condition.
102 Main alarm system is a system performing signal handling and initiation of an alarm, and communicates with the
bridge alarm system, the engineers’ alarm and the engineers’
watch call system.
103 Local (sub) alarm systems is a system performing signal
handling and initiates the local alarm, and communicates with
the main alarm system.
Guidance note:
The local alarm system may only give visual signal when the audible signal is handled by the main alarm system.
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104 Engineers’ watch call system is the main alarm system
extension to the engineers’ cabins and public spaces and is in
operation when the engine room is unattended.
Guidance note:
The engineers’ watch call system is normally integrated with the
engineers’ alarm, but may be separate systems.
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105 Engineers’ alarm is a collective call system in the engineers’ cabins and public spaces that is activated if an alarm has
not received attention locally within a limited time during unattended periods or manually by the responsible watch-keeping engineer.
DET NORSKE VERITAS
Rules for Ships, January 2002
Pt.6 Ch.3 Sec.1 – Page 6
C. Documentation
C 100 Plans and particulars
101 For general requirements for documentation of instrumentation and automation, including computer based control
and monitoring, see Pt.4 Ch.9 Sec.1.
102 For requirements related to fire protection, detection and
extinction, see Pt.4 Ch.10 Sec.1.
103 For the instrumentation systems listed, documentation is
to be submitted according to Table C1. The upper row of Table
C1 refers to the documentation types defined in Pt.4 Ch.9
Sec.1 C200.
Table C1 Requirements for documentation of instrumentation systems
020 030 040 050 060 070 080 090 100 110 115
For class notations E0 and ECO:
BIC
X
X
X
BLC
X
X
X
EPC
X
X
X
X
X
FUO
X
X
FWC
X
X
HYD
X
X
LUO
X
X
PNE
X
X
SCM
X
X
SWC
X
X
In addition for class notation E0:
EWC
X
X
X
X
X
In addition for class notation ECO:
MCS
X
X
Instrumentation systems:
BIC
Bilge system control and monitoring
BLC
Ballast system control and monitoring
EPC
Generator and electrical power system control and monitoring
EWC Engineer alarm and watch call system
FUO Fuel oil system control and monitoring
FWC Feed water and condensate system control and monitoring
HYD Hydraulic power system control and monitoring
LUO Lubricating oil system control and monitoring
MCS Machinery control station
PNE
Pneumatic control and monitoring system
SCM Steam system control and monitoring
SWC Sea and fresh water system control and monitoring
120
130
140
150
160
170
180
190
200
X
X
Documentation types:
030
Functional description
040
System block diagrams (T)
050
System diagrams (P&IDs, D&IDs, etc.) (T)
060
User interface description
070
Power supply arrangement (T)
080
Arrangement and layout (T)
100
Instrument and equipment list (T)
110
Data sheets with environmental specifications
140
Test program for application software at manufacturer (T)
T Required also for type approved systems
D. Operation and maintenance manuals
D 100 General
101 Operation and maintenance manuals are to be kept on
board. For the required content of the manuals, see Pt.4 Ch.9
Sec.1 C200.
Guidance note:
It may be convenient that the operation and maintenance material
is arranged as a master manual covering the complete instrumentation and automation installation in the engine room, with reference to particular manuals for the sub-systems.
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102 The plan for systematic maintenance and function testing is to show in detail how control, alarm and safety components and systems are to be tested and what is to be observed
during the tests.
Columns showing test dates and verification of tests carried
out are to be included. The plan is to include:
a) All instrumentation, automation and control systems affecting functions required to be controlled and monitored
in this chapter.
b) Test intervals to reflect the consequences of failure involving a particular system. Functional testing of critical
alarms should not exceed 3 month intervals. Normally the
longest intervals are not to surpass 12 months.
Guidance note:
Critical alarms are defined as low lubricating oil pressure alarms
for rotating machinery and water levels in boilers.
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103 On the bridge and at the control stand in the engine
room, instructions are to be fitted, stating routines to be followed in connection with transfer of control to/from engine
room, and precautions to be taken at alarm condition.
DET NORSKE VERITAS
Rules for Ships, January 2002
Pt.6 Ch.3 Sec.2 – Page 7
SECTION 2
SYSTEM ARRANGEMENT
A. General
A 100 Extent of automation
101 The extent of automation is to be sufficient to permit unattended engine room operation for 24 hours, or for the maximum continuous operation time when less than 24 hours.
Normal service at sea and normal manoeuvres is presumed.
Normal manoeuvres do not include emergency manoeuvres,
where alarm and safety limits may be exceeded.
102 Starting of engine plant and transfer to various operating
modes may be accepted as manual operations, if the need for
such actions will not arise at short notice.
—
Any common non-redundant cabling between UPS and
consecutive power distribution is to be as short as possible
and installed well protected from external strains.
Guidance note:
As short as possible should be understood as 2 m or less.
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Guidance note:
Also see relevant requirements given in Pt.4 Ch.8, in particular
Sec.2 I300.
B. Automatic Control System
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B 100 General
101 Automatic control systems are to keep all parameters
within the limits for safe operation under all load conditions,
as defined in A101.
B 200 Special requirements
201 Where the bilge pumps are arranged for automatic starting, an alarm is to be initiated if the influx of liquid is greater
than the pump capacity or when the pump is operating more
frequently than would normally be expected.
202 For reversible engines, the starting air receivers are to be
automatically charged.
C. Alarm System
C 100 General
101 A main alarm system is to be installed at the machinery
control station in the engine room or in the engine control
room, if provided.
102 Local (sub) alarm systems are permitted provided there
is one common alarm to the main alarm system from each local
alarm system. Local alarm systems may also, on consideration,
be permitted to include a safety system, and in such case there
are to be at least two separate alarms to the main alarm system
from the local alarm system.
103 The alarm system is to be continuously powered and is
to have an automatic changeover to a stand-by power supply in
case of loss of normal power supply. The capacity of the standby power supply is to be sufficient for at least 30 minutes operation.
The standby power supply may be arranged as a combined
main or standby power supply taken from an integral battery or
inverter (UPS system) provided protected against most probable internal failures as follows:
— For D.C. supply:
— The battery is to be separated from the electronic part
and distribution outlet by means of a fire wall (e.g.
steel sheet) internally in the UPS.
— The distribution outlet is protected from flashover or
other single failures in the electronic part.
—
— The battery is to be separated from the electronic part
as for D.C. supply.
— An automatic bypass is arranged externally to the
UPS.
For A.C. supply with same voltage on inlet- and outlet
side of UPS:
104 The main alarm system is to activate the engineers'
alarm (repeat alarm) required by Pt.4 Ch.1 Sec.3 A302 if a machinery alarm is not acknowledged locally within a limited
time.
Guidance note:
Limited time should be understood to be between 1 to 3 minutes.
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C 200 Alarm system on the bridge
201 Any alarm condition in the engine room is to initiate an
alarm on the bridge with individual or groupwise indication.
The visual alarm signal is to remain extant until acknowledged
in the engine room.
202 Alarm conditions within one group shall not prevent the
initiation of alarms in other groups. New alarms within a group
shall not be inhibited by acknowledged existing alarms.
203 The alarm systems on the bridge and in the engineers’
accommodation are to be so designed that the more frequent
faults, such as power failure or broken cable connections to the
engine room, initiate an alarm.
Guidance note:
Separate cable connections for visual and acoustic signals may
be accepted as an alternative to live current self monitoring. It is
advised that group alarms on the bridge are inhibited when the
engine room is attended. However, when the main engine is controlled from the bridge, monitoring of the remote control system
as well as failure conditions leading to or requesting stop or reduction of main engine, should not be inhibited. Acknowledgement of audible signals on the bridge should be possible from the
bridge. The light intensity of alarm indicators on the bridge
should not be reducible below the intensity necessary in normal
daylight, unless automatic adjustment of light intensity based on
ambient light conditions is arranged.
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204 Failure of the power supply to the main and local alarm
system shall initiate an alarm.
205 Total power failure to the bridge alarm system shall initiate an alarm on a separate alarm system and indicated as required in Sec.3 B101.
C 300 Alarm system in the engineers’ accommodation
301 An engineer's watch call system shall be installed in the
watch-keeping engine officer's cabins and engineers' public
spaces as for example day room. Any alarm condition in the
main alarm system shall initiate an alarm on the responsible
DET NORSKE VERITAS
Rules for Ships, January 2002
Pt.6 Ch.3 Sec.2 – Page 8
watch-keeping engineers' watch call system and in the engineers' public spaces during unattended periods. Acknowledgement in the cabin is to be indicated on the bridge when the
engine room is unattended.
302 The engineers' watch call system shall be activated by
the watch responsibility transfer system.
C 400 Watch responsibility transfer system
401 A system for watch responsibility transfer shall be installed.
402 The system shall initiate audible and optical (flashing
light) warning at both control positions when watch transfer is
requested, and the warning shall remain in operation until acknowledged.
403 The responsibility shall not be transferred before acknowledgement at the receiving end.
404 Indication shall be provided showing which control station has the watch responsibility.
405 Transfer of the watch responsibility to the navigating
bridge shall not be possible without having set the engineers'
watch call system to a responsible watch-keeping engineer.
D. Safety System
D 100 General
101 The safety system is to cover fault conditions which may
develop too fast to be counteracted by manual intervention locally.
102 When two or more safety actions are initiated by one
failure condition (e.g. start of standby pump and stop of engine
at low lubricating oil pressure), these actions are to be activated at different levels.
The least drastic action is to be activated first.
103 Power failure in the safety system is neither to cause loss
of propulsion nor steering functions.
104 Whenever the safety system is activated, alarm is to be
initiated.
D 200 Automatic start of pumps
201 Faults in the mechanical or electrical system of the running pump are not to inhibit automatic start of the standby
pump.
202 Automatic start of the standby pump is to be initiated by
the process parameter which is being monitored, e.g. low pressure signal, and is to be arranged so that the standby pump does
not stop automatically when first started («locking circuit»).
203 Manual start and stop of the pumps is to be possible
without initiating an alarm for the automatic start of the standby pump.
204 Operating circuits for pump units are to be arranged according to Pt.4 Ch.8.
205 When a pump is standby, this is to be clearly indicated
on the switch panel by indicating lamps, etc.
D 300 Automatic start/connection of diesel generator
units
301 When several generator units have individual systems
for automatic start and connection on to the main switchboard,
each system is to be selectively fused (separate short circuit
protection), and an alarm is to be initiated for voltage failure.
302 Automatic attempts which fail to produce a start are to
be limited to restrict consumption of starting energy.
303 Tachometer feedback to the starting system is to be arranged so that broken mechanical pinions or external electrical
connections do not lead to stop of a running generator unit.
Neither are such faults to inhibit automatic stop or alarm functions.
304 Manual start and stop of generator units is not to initiate
an alarm.
305 The generator circuit breaker is to be provided with automatic wind up of the closing spring of the breaker.
306 Simultaneous connection of generators on to the main
switchboard is not to be possible.
307 If there is no arrangement for automatic synchronisation, parallelling and load sharing, connection is only to be
possible when auxiliary contacts on the generator circuit
breakers show directly that all generators are disconnected
from the main switchboard.
308 When a generator unit is standby, this is to be indicated
on the control panel.
309 The voltage of a generator being connected on to a deenergised switchboard is to be sufficiently high for safe operation of all connected circuits.
310 No more than one attempt of automatic connection on to
a de-energised switchboard is permitted.
311 Systems with automatic synchronisation, connection,
and load sharing are to be designed so that deviations in voltage, frequency, and phase at the instant of connection are within adequate safety limits for generator and engine.
312 Means for manual synchronisation and parallelling are
to be provided.
313 When automatic start of standby generator unit is caused
by reduction of voltage or frequency below the criteria for automatic connection, the running unit is to be stopped when the
standby unit is ready for connection.
314 Systems with automatic start of the standby unit at heavy
load on running units are to be arranged with adequate delay to
prevent false start attempts, e.g. caused by short load peaks.
315 The battery supplying the diesel engine automatic start/
stop system is to have at least twice the capacity required for
maximum load for 1/2 hour for all consumers connected to the
system.
316 Batteries are generally to be continually charged (trickle
charge) from a charge rectifier having sufficient capacity to
supply the sum of the trickle charge current, the current according to the fuse rating of the largest consumer, and the normal load current for all other consumers.
A lower charge rectifier capacity may be approved, provided
the distribution system is monitored for ground faults. The capacity is not to be less than the sum of the trickle charge current
plus average normal load during 24 hours for all consumers
with a 10% allowance in addition.
D 400 Automatic stop of auxiliary engines and propulsion machinery
401 The system for automatic stop and alarm is to be selectively fused (separate short circuit protection). Similarly, automatic stop circuits for individual units are to be selectively
fused.
An alarm is to be initiated for voltage failure.
402 The safety system is to be arranged so that a single open
circuit in wiring between sensors and control unit, or between
control unit and actuators, does not cause unintentional stop.
Guidance note:
A single system based on normally open contacts can be accepted; alternatively, a system with normally closed contacts where
discrimination between broken connections and stop signals is
provided.
DET NORSKE VERITAS
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Rules for Ships, January 2002
Pt.6 Ch.3 Sec.2 – Page 9
403 The requirements of 402 can be waived if the manoeuvrability is maintained after shutdown of one unit, see Pt.4
Ch.9 Sec.3A.
404 All parameters which may cause automatic stop are normally to initiate an alarm prior to stop.
Guidance note:
Propulsion machinery is defined as all machinery which will
cause loss of the propulsion function if stopped, with exception
of main boilers.
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D 500 Automatic stop of oil fired auxiliary boilers
501 Connections between sensors and control unit are to be
based upon normally closed contacts, so that an open circuit
will lead to shutoff of the oil supply.
502 The parameter causing an automatic stop is to be identified on the control panel.
D 600 Internal communication
601 Internal communication is to be provided according to
Pt.4 Ch.12 Sec.2 C300.
appropriate, detection systems using only thermal detectors
shall not be permitted. The detection system shall initiate audible and visual alarms distinct in both respects from the alarms
of any other system not indicating fire, in sufficient places to ensure that the alarms are heard and observed on the navigating
bridge and by a responsible engineer officer. When the navigating bridge is unmanned the alarm shall sound in a place where
a responsible member of the crew is on duty.
(SOLAS reg. II-2/14.2)
Guidance note:
Thermal detectors only may be used in workshops adjacent to
machinery spaces when the nature of the work being carried out
will cause erroneous alarms. This guidance note only applies if
the compartments themselves do not contain fuel oil installations.
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103 Fire detectors are to be type approved.
Guidance note:
Where fire detectors are provided with timers (in workshops) for
inhibiting the alarm, these should be arranged to automatically
reset the alarm upon completion of timer and should not be possible to negate for period exceeding 15 minutes.
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E. Fire Safety and Fire Detection and Alarm
System
104 Manually operated call points are to be located at the following positions:
E 100 General
101 A fixed fire detection and fire alarm system of an ap-
— passageways and stairways, including emergency exits,
having nearby entrance to engine and boiler rooms
— navigation bridge
— control station in engine room.
proved type in accordance with the relevant provisions of Reg.
13 (Pt.4 Ch.10) shall be installed in periodically unattended machinery spaces.
(SOLAS reg. II-2/14.1)
102 This fire detection system shall be so designed and the
detectors so positioned as to detect rapidly the onset of fire in
any part of those spaces and under any normal conditions of
operation of the machinery and variations of ventilation as required by the possible range of ambient temperatures. Except
in spaces of restricted height and where their use is specially
Guidance note:
Manual call points should be located as required by SOLAS Ch.
II-2.
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105 Start of fire pumps shall be arranged according to the requirements in Pt.4 Ch.10 Sec.2.
DET NORSKE VERITAS
Rules for Ships, January 2002
Pt.6 Ch.3 Sec.3 – Page 10
SECTION 3
CLASS NOTATION E0
A. Extent of Monitoring
A 100 General
101 The monitoring system is to cover machinery and equipment having functions necessary for the propulsion and steering safety of the ship, see Pt.1 Ch.1 Sec.2 A200.
102 The parameters to be monitored will depend upon output
and type of engine as well as arrangement of machinery plant.
Normally, it will be required that the parameters listed in Tables A1 to A8 are monitored. Other combinations than those
listed may be accepted, when the chosen monitoring can detect
fault conditions in an equivalent satisfactory manner.
For monitoring of gas turbine installations, see Pt.4 Ch.3 Sec.2
E.
A 200 Safety actions
201 Unless otherwise specified, the safety shut-downs and
slow-downs required in the tables may be executed automatically or manually from the bridge upon such request from the
alarm system.
202 When an emergency device for overriding a safety action is provided, it is to be such arranged that unintentional operation is prevented, and it should be clearly indicated when
the device is operated.
203 Normally an emergency device would be required on the
bridge for overriding of automatic shutdowns which are installed additional to those specified in the Tables A1 to A5.
204 For multi-engine plants, overriding of safety shutdowns
is not required if manoeuvrability of the vessel is maintained.
205 When both an alarm and an automatic safety action are
required for one failure condition, alarm is to be activated first.
B. Arrangement on the Bridge
B 100 General
101 All alarms in the engine room are to initiate an alarm on
the bridge, individual or collective.
102 Individual alarms are required for:
— automatic shutdown of main boiler
— automatic shutdown and/or slowdown of propulsion machinery
— request for manual shutdown and/or slowdown of propulsion machinery
— power failure bridge alarm system
— failure in the remote control systems with respect to propulsion machinery, including controllable pitch propeller
if arranged
— failure in the remote control systems with respect to steering.
103 The propulsion plant shall be restarted after a blackout,
either manually from the navigating bridge or automatically.
When manual starting from the navigating bridge is arranged,
an indication shall be provided when the propulsion can be restarted, i.e., when all systems are in normal operating condition.
The starting arrangement shall be simple to operate. This requirement does not apply to steam propulsion plants.
104 Resetting of the propulsion machinery safety system
shall be arranged when it is activated at black out. The reset ac-
tion may either be automatic, or manually activated from the
bridge, e.g. by bringing the manoeuvring lever to stop position.
The reset shall only be possible when the all applicable parameters are in normal condition.
C. Arrangement in the Engine Room
C 100 General
101 Indicating instruments, alarm displays and manoeuvring
devices are to be centralised in a convenient position, in or adjacent to the engine room.
Guidance note:
The layout of instruments in the control desk should comply with
generally accepted ergonomic principles. Red lamps should be
used only as alarm lamps.
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D. Electric Power Supply
D 100 Main source
101 Arrangements are to be provided to prevent overloading
of the generating sets.
Guidance note:
A generating set consists of one electrical generator and its prime
mover.
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102 The main source of electrical power is to comply with
the following:
— automatic starting and connecting to the main switchboard
of the stand-by generator, with automatic restarting of the
essential auxiliaries on loss of power, shall be arranged
— connection to the main switchboard to be completed within 30 seconds after loss of power
— In addition, where the electrical power is normally supplied by more than one generator simultaneously in parallel operation, provision shall be made to ensure that, in
case of loss of one of these generating sets, the remaining
ones are kept in operation to permit propulsion and steering.
103 Standby generating sets are normally to have separate
cooling water and lubricating oil pumps. Alternatively, automatic start of standby pumps is to be arranged when they also
serve other generating sets.
104 When the manoeuvrability of the ship is independent of
electric power, the requirements of 102 do not apply.
D 200 Secondary distribution systems
201 For essential consumers with power supply from secondary distribution systems, precautions against power failure
are to be similar to those taken for units having power supply
from the main system. E.g., the following means may be applied:
— adequate automatic emergency lighting for access to
standby transformer for the lighting system and operating
gear for manual connection
— automatic connection of standby transformer
DET NORSKE VERITAS
Rules for Ships, January 2002
Pt.6 Ch.3 Sec.3 – Page 11
— parallel connection of a sufficient number of transformers
and arrangement for selective disconnection
— automatic connection of emergency source of power
— dividing the system in two or more circuits with automatic
switchover.
In this context, essential consumers are units and equipment
necessary for manoeuvring of the ship, including navigation
lights and sufficient lighting (either as part of the normal lighting or as separate emergency lighting) in the engine room, on
the bridge, in the chart room, in all passageways and stairways
of the accommodation.
E. Fire Safety
E 100 General
101 Where the Society finds it necessary, oil fuel and lubricating oil pressure pipelines are to be screened or otherwise
suitably protected to avoid as far as practicable oil spray or
leakages on to hot surfaces or into machinery air intakes. Fuel
oil injection pipes on all engines, irrespective of cylinder bore,
are to be effectively shielded and secured. The number of
joints in such piping systems are to be kept to a minimum and,
where practicable, leakages from high pressure oil fuel pipes
are to be collected and safe drainage to a collecting tank is to
be provided (see Pt.4 Ch.3 Sec.1 Table E1 and Table E2).
102 Starting of fire pumps shall be arranged according to the
requirements in Pt.4 Ch.10 Sec.2 B204.
F. Special Requirements for Ships less than 300
Gross Tonnage with Propulsive Output less than
1000 kW per Engine
Miscellaneous:
—
—
—
—
—
fire in engine room
bilge level, high
variable pitch propeller, servo oil pressure, low
gear, lubricating oil pressure, low
power failure, alarm and remote control system.
Main and auxiliary engines: See Pt.4 Ch.3.
F 200 Arrangement on the bridge
201 All alarms in the engine room are to initiate an alarm on
the navigating bridge, individual or collective.
F 300 Electric Power Supply
301 When the manoeuvrability of the ship is dependent on
electric power, precautions are to be taken to avoid that power
supply units are overloaded.
F 400 Fire safety
401 Fuel oil injection pipes on all engines, irrespective of
cylinder bore, are to be effectively shielded and clamped.
F 500 Fire alarm system
501 The ship shall have an electric fire alarm system. The
electric fire alarm system shall be initiated in the event of fire
in the engine room and or boiler room.
Guidance note:
The fire detectors may be arranged as a single loop provided it is
normally closed.
The fire detectors loop(s) may be connected to the machinery
alarm system provided separate indication on the navigating
bridge is arranged.
F 100 Extent of monitoring
101 An alarm is to be initiated for the following conditions:
DET NORSKE VERITAS
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Rules for Ships, January 2002
Pt.6 Ch.3 Sec.3 – Page 12
Table A1 Monitoring of propulsion machinery. Diesel engines.
Alarm and safety action
(stated by an x)
Item
Automatic start of
Alarm
standby pump with
alarm 1)
Temperature inlet, high
x
Lubricating oil. Pressure, low
All separate
systems
Pressure, low
Pressure, low
Turbo-charger
r.p.m. high
r.p.m.
Turbo-charger Temperature, high
lubrication
Pressure, low
Cylinder
Flow, low
lubrication 2)
Pressure, low
Pressure, low
Cylinder
cooling
Pressure, low
medium
Temperature, high
Flow, low
Pressure, low
Pressure, low
Temperature, high
Pressure, low
Fuel valve cool- Pressure, low
ing medium
Temperature, high
Pressure, low
Sea cooling
water
Pressure, low
Temperature or viscosity
Fuel oil inlet on of heavy oil, low/high
engine
Pressure, low
Pressure, low
Double or
shielded fuel oil Leakage
pipes
Scavenge
Temperature, high
air receiver 3)
Piston
cooling
medium
Exhaust gas,
outlet each
cylinder
Exhaust gas,
outlet exhaust
turbine
Starting air
Main thrust
bearing
Crankcase
explosive
conditions 4) 6)
Comments
Independent of safety shut down system.
Engine slow down 5)
x
x
x
Engine shut down
x
x
x
If not integral with turbo charger
If not integral with turbo charger
x
Engine slow down 5)
x
x
Engine slow down 5)
Outlet each cylinder if individual stop valves are
fitted for the cylinder jackets. Engine slow down 5)
Each piston. Engine slow down 5)
x
x
x
x
x
Each piston. Engine slow down 5)
x
x
x
If installed
x
x
x
x
x
Inlet injection pump (after filter)
x
x
Level monitoring of leakage tank or equivalent
x
Engine slow down 5)
Temperature, high
x
Engines, power > 130 kW/cylinder 7)
Engine slow down 5)
Temperature deviation
from average, large
x
Engines, power > 130 kW/cylinder 7)
Temperature, high
x
If no individual cylinder monitoring
Pressure, low
Temperature, high, metal
temperature
Temperature, high-high,
metal temperature
x
Before starting valve
x
Engine slow down 5)
x
Engine shut down
Bearing temperature or
oil mist concentration, high
x
Engine slow down 5)
1)
To be provided when standby pump is required.
2)
At least one measuring point for each lubricator unit.
3)
For detection of fire (per cylinder).
4)
Engines of 2250 kW and above or having cylinders of more than 200 mm bore.
5)
Pitch reduction in case of controllable pitch propeller.
6)
See also Table E1 under Pt.4 Ch.3 Sec.1 for details.
7)
Higher limits may be evaluated, if other means are provided for monitoring of critical running conditions for engine and power transmissions (torsional
stress automatic monitoring of couplings at misfiring may be one component to be evaluated).
DET NORSKE VERITAS
Rules for Ships, January 2002
Pt.6 Ch.3 Sec.3 – Page 13
Table A2 Monitoring of propulsion machinery. Steam turbine plants
Alarm and safety action
(stated by an x)
Item
Automatic start of
Alarm
standby pump with
alarm 1)
Temperature, high
x
Pressure, low
x
Lubricating
Pressure, low
x
oil inlet
Pressure, low
x
Filter diff. pressure, high
x
Bearings, turbine
Temperature, high
x
and gear
Lubricating oil
Level, low
x
Pressure, high
x
Gland
Pressure, low
x
steam
Exhaust fan, stopped
x
Pressure, low
x
Hydraulic system
Pressure, low
x
Turbine
slow-turning
Failed
x
arrangement
Overspeed
Rotor
Axial displacement, high
x
Vibration
Level, high
x
Level, high
x
Level, high
x
Level, high
x
Level, low
x
Condensate
system
Vacuum, low
x
Vacuum pump, stopped
x
Vacuum, low
x
Salinity, high
x
Cooling water
Flow, low
x
1)
To be provided when standby pump is required
DET NORSKE VERITAS
Comments
Independent of safety shut down system
Turbine automatic shut down
In gravity tank
If separate system
See Pt.4 Ch.3 Sec.3
Turbine shut down
Turbine shut down
Turbine shut down
If non-cavitating condensate pump
Turbine shut down
Rules for Ships, January 2002
Pt.6 Ch.3 Sec.3 – Page 14
Table A3 Monitoring of main steam and feed water installation
Alarm and safety action
(stated by an x)
Item
Automatic shut
Alarm
down of boiler
with alarm
Level, high
x
Level, high
x
Water
Level, low
x
Level, low
x
Circulation
Stopped
x
Combustion
Fan stopped
x
air supply
Rotating
Motor stopped
x
air heater
Uptake gas
Temperature, high
x
Pressure, low
x
Fuel oil,
outlet pump
Pressure, low
Temperature
or viscosity,
x
heavy oil, high
Fuel oil
Temperature
or viscosity
x
heavy oil, low
Pressure of atomizing mediOil burner
x
um, low
Pressure, high
x
Pressure, low
x
Steam
Temperature, high
x
Ignition/flame
Feed
water
system
Feed water
High pressure
feed water
heaters
Fresh water
generator
Failed ignition
and/or flame failure
Level, atmospheric
drain tank, high
Level, atmospheric
drain tank, low
Level, deaerator, high
Level, deaerator, low
Pressure, deaerator, high
Pressure, deaerator, low
Temperature, high
Pressure, low
Pressure, low
x
Comments
Turbine shut down
Independent of safety shut down system
Forced circulation boilers
For fire detection
Automatic start of standby pump with alarm
Turbine slow down
For superheated and desuperheated steam outlet
(external desuperheaters)
Separate monitoring and fuel shut-off
for each burner
x
x
x
x
x
x
x
x
Outlet of ejector cooler/gland condenser
Automatic start of stand by pump with alarm
Level, high
x
Salinity, fresh
water outlet, high
x
Automatic stop of generator or by-passing
of consumers
DET NORSKE VERITAS
Rules for Ships, January 2002
Pt.6 Ch.3 Sec.3 – Page 15
Table A4 Monitoring of shafting and propeller plant
Alarm and safety action
(stated by an x)
Item
Automatic start of
Alarm
standby pump with
alarm 1)
Shafting
Temperature, thrust
bearing, high
x
Temperature, shaft plain bearings, high
x
Temperature, stern tube bearing, high
x
Level, stern tube
lubricating oil
gravity tank, low
Pressure,
low
Controllable
pitch propeller, Pressure, low
servo oil
Temperature, high
Pressure, low
Pressure, low
Gear,
lubricating oil Pressure, low
Temperature, high
Pressure, low
Coupling/
clutch
Pressure, low
1)
Comments
Slow down
Two sensors for diesel engine built in thrust
bearing, and for steam turbine plants
Shaft power > 1500 kW. Sensor to be located
near the bearing surface
Shaft power > 15000 kW. Sensor to be located
near the bearing surface at the area of highest
load
x
x
x
x
x
Shaft power > 1500kW
Independent of safety system
x
x
x
x
Shut down or clutch disengagement
Hydraulic or pneumatic
x
To be provided when standby pump is required. Not required for pumps directly driven by prime mover.
DET NORSKE VERITAS
Rules for Ships, January 2002
Pt.6 Ch.3 Sec.3 – Page 16
Table A5 Monitoring of electrical power generating plant
Alarm and safety action
(stated by an x)
Item
Automatic shut
Alarm
down of prime
mover with alarm
Pressure, lubricating
x
oil inlet, low
Voltage, high
x
Generator
Voltage, low
x
Frequency, low
x
Disconnection of
x
nonessential consumers
Temperature, lubricating oil,
x
high
Pressure, lubricating oil inlet,
x
low
Pressure, lubricating oil inlet,
x
low
Temperature, cooling water
x
outlet, high
Fresh water expansion tank
x
low level
Temperature, cooling water
x
outlet, high
Cooling water pressure or
x
flow, low
Crankcase, explosive condiDiesel engine
tions. See Pt.4 Ch.3 Sec.1 for
x
details
Exhaust gas, high temperax
ture, each cylinder
Exhaust gas, high temperature
deviation from average, each
cylinder
Exhaust gas, high temperax
ture, after turbocharger
Starting air pressure, low
x
Double or shielded fuel oil
x
pipes, leakage
Overspeed
x
Turbocharger, overspeed
x
Steam turbine
1)
Temperature,
lubricating oil, high
Pressure,
lubricating oil inlet, low
Pressure,
lubricating oil inlet, low
Pressure,
condenser, high
Pressure,
condenser, high
Pressure,
steam inlet line, low
Axial displacement
rotor, large
Overspeed
Comments
If separate system
When manoeuvring is dependent on electric power.
Independent of safety system
When manoeuvring is dependent on electric power
For engines having a power of more than 2250 kW or
a cylinder bore of more than 200 mm
For cylinder power > 130 kW
For cylinder power > 130 kW 1)
For cylinder power ≤ 130 kW if no individual exhausts temperature monitoring
Level monitoring of leakage tank or equivalent
See Pt.4 Ch.3 Sec.1
Applicable when turbocharger serves a group of cylinders > 1000 kW
x
x
Independent of safety system
x
x
x
x
x
Multistage turbines
See Pt.4 Ch.3 Sec.3
Higher limits may be evaluated, if other means are provided for monitoring of critical running conditions for engine and power transmissions (torsional
stress automatic monitoring of couplings at misfiring may be one component to be evaluated).
DET NORSKE VERITAS
Rules for Ships, January 2002
Pt.6 Ch.3 Sec.3 – Page 17
Table A6 Monitoring of auxiliary boiler plant
Item
Level, high
Water,
not double
Level, low
pressure boilers Level, low
Level,
primary system, low
Level,
Water, double primary system, low
pressure boilers Level,
secondary system, high
Level,
secondary system, low
Circulation
Stopped
Combustion
Fan stopped
air supply
Temperature or viscosity
heavy oil, high
Fuel oil
Temperature or viscosity
heavy oil, low
Pressure, high
Steam
Feed water
Condenser
Ignition/flame
x
Independent of safety system
x
x
x
x
Forced circulation boilers
x
x
x
x
x
When the automatic control system does not
cover the entire load range from zero load
For superheated steam > 350°C
When heat exchangers are integral with the
boiler. For fire detection
Boiler pressure > 20 bar
When steam is used in fuel and
lubrication oil heat exchangers
x
Separate monitoring and fuel shut off for
each burner
x
x
High
Salinity, high
x
Oil contamination, high
x
Pressure, high
Failed ignition and/or
flame failure
x
Table A7 Monitoring of miscellaneous objects
Item
Alarm
Bilges and bilge wells
Level, engine room, high
Comments
Independent of safety system
Pressure, high
Temperature, high
Uptake
temperature
Alarm and safety action
(stated by an x)
Automatic shut
Alarm
down of boiler
with alarm
x
x
x
x
Comments
2 independent
alarm circuits.
Minimum
2 detectors
Purifiers
Temperature, oil inlet, high
Temperature, oil inlet, low
Waterseal, loss
Soot-blowers, sequence stopped
Automatic control system, power failure
Alarm and safety system, power failure
Remote control system,
power failure
x
x
x
For heavy fuel oil
x
x
x
Electric,
pneumatic,
hydraulic
x
Fire alarm systems,
failure
Table A8 Monitoring of tanks
Item
Sludge and drain tanks, level, high
Service tanks, level, low
Expansion tanks, level, low
Circulating tanks, level, low
Fuel oil drain collecting tank, level, high
x
Alarm
x
x
x
x
x
Comments
When automatic
pumping up of tanks is arranged, an alarm
shall be initiated if the safe level exceeds safe
levels are exceeded
DET NORSKE VERITAS
Rules for Ships, January 2002
Pt.6 Ch.3 Sec.4 – Page 18
SECTION 4
CLASS NOTATION ECO
A. General Requirements
extent applicable.
A 100 Application
101 This section applies to machinery operation with continuous supervision from a centralised control station. The control station is to provide control and monitoring devices
necessary to make the machinery operation as safe and effective as it would be under direct supervision.
C 200 Alarm system
201 A system of alarm displays are to be provided in the centralised control station for easy identification of machinery
faults.
202 The machinery alarms need not be relayed to the bridge
and engineers accommodation.
B. Control Station
C 300 Safety system
301 The safety systems specified in Sec.2 D can be omitted.
Corrective actions at machinery faults are presumed to be carried out manually.
B 100 Arrangement
101 The arrangement is to be such that all supervisions and
manual operations which are necessary for safe operation of
the machinery plant can be carried out at the control station.
This will imply that stopping of machinery, starting of standby units etc. in case of machinery faults is to be possible from
the control station if not automatically carried out.
102 The control station is to be located in the engine room or
in its close proximity. The control station may be arranged on
or adjacent to navigating bridge provided it does not interfere
with the navigating bridge control positions, and an additional
centralised control position is arranged in or adjacent to the engine room. This control position shall permit some machinery
control and monitoring facilities as required in A101.
C. System Arrangement
C 100 General
101 The requirements of Sec.2 are to be complied with to the
C 400 Remote control system
401 Propulsion machinery is to be arranged for remote control from the centralised control station. The requirements given in Pt.4 Ch.2 Sec.1 are to be complied with to the extent
applicable.
C 500 Fire alarm system
501 The fire alarm system is to satisfy the requirement of
Sec.2 E.
D. Extent of Monitoring
D 100 General
101 The alarms required according to Sec.3 are to be provided. The automatic safety actions required in the same section
such as stop of engine, start of stand-by pumps, and start of
stand-by generator can be omitted, and carried out manually.
DET NORSKE VERITAS
Rules for Ships, January 2002
Pt.6 Ch.3 Sec.5 – Page 19
SECTION 5
SURVEY
A. General
far as practicable it is to be verified that all normal control
ranges are covered.
A 100 Trials
101 Upon completion of the installation, trials are to be carried out alongside quay and at sea in the presence of the surveyor.
102 The sea trials should be reserved solely for testing of the
automatic and the remote control systems, and the fire alarm
system. Other tests should be completed alongside quay.
103 The sea trials are to include a four hours continuous operation with unattended machinery spaces.
Agreement is to be made in advance in each case for personnel
that will be present in the control room.
Guidance note:
Personnel for ordinary upkeep and control of the machinery are
not to be present in the engine room. Special measurements can
be carried out according to agreement, e.g. noise measurements.
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104 A detailed test programme, including expected test results, is to be prepared and submitted for approval well in advance of the trials. The programme is to be kept onboard, all
filled in and signed by the surveyor upon completion of the trials.
105 Recording of important automatically controlled parameters may be required as part of the testing.
A 200 Monitoring system
201 Failure conditions are to be simulated as realistically as
possible, preferably by letting the monitored parameters exceed the alarm and safety limits. Alternatively, when lack of
space on an engine prevents the installation of test valves for
pressure transmitters and or thermometer wells for analogue
temperature elements, a system for ensuring that both electronic and sensor system part is in order without the use of pressure
or temperature calibrators may be accepted. This system shall
be quick and easy to use, and be developed and documented by
the engine manufacturer. It may only be used in connection
with sensors with an analogue value output. The system shall
be approved by DNV before testing commences.
The alarm and safety limits are to be recorded in the test programme.
Guidance note:
Test methods:
1)
2)
3)
Analogue sensors may be calibrated by in situ comparison
to indicating instruments installed close to the sensors.
When the deviation in reading is more than 5%, a more precise calibration is necessary.
Changing set point to the present system value during normal running may be an acceptable system test method for
computer based systems only, provided sensor connection
check has been performed separately.
It will not be acceptable to change a set point by e.g. potentiometer adjustment to simulate fault conditions.
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202 Any calibration of sensors prior to installation onboard
is to be approved by the surveyor.
A 300 Automatic control systems
301 Automatic control systems are to be tested by varying
the parameters having effect upon the controlled process. As
Guidance note:
Observation of the automatic control system performance during
the tests specified under B for the remote control system will normally be accepted as adequate testing.
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A 400 Electric power generating system
401 At bridge control and half speed ahead, simulate a fault
condition causing automatic stop of electric power generator.
402 For plants with automatic start and connection of standby unit, check restart of all essential auxiliaries, and that the
bridge control system is again operative without manual intervention in the engine room.
403 For plants with more than one generator running in parallel, it is to be checked that the stopped unit is automatically
disconnected from the switchboard, and that the generator capacity of the remaining units is sufficient for propulsion and
steering functions after tripping of non-essential consumers.
404 Verify that it is possible to start the propulsion machinery from the bridge unless automatically started after blackout. (see Sec.3 B103).
A 500 Fire alarm system
501 After installation the system shall be tested under varying
conditions of engine operation and ventilation.
(SOLAS Reg. II-2/14.3).
Guidance note:
The test is to be performed with all machinery and ventilation
running in normal sea going conditions during the sea trial by
means of smoke released in positions of high fire risk.
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A 600 Remote control system
601 Testing of the remote control system for the propulsion
machinery is to be carried out at sea. Prior to testing, the propulsion machinery is to run for at least 1 hour.
602 All tests included in the test programme for the remote
control system are to be carried out without manual assistance
from the engine room, and all systems are to be in operation as
normal for unattended machinery space.
B. Testing of Remote Control System. Guidance
B 100 Ships with fixed pitch propeller
101 The test programme should as a minimum include the
following manoeuvres:
— from stop to dead slow ahead. Proceed stepwise to full
ahead. Before each step increase, the r.p.m. of the previous
setting is to have reached its steady state condition
— from approximately 2/3 of full speed ahead, go quickly to
slow astern. Proceed stepwise to full astern
— stop
— after approximately 5 minutes stop, start ahead
— when the ship has reached approximately 2/3 of full speed
ahead, go quickly to half astern
— when the ship is «dead in the water», go quickly to full
ahead
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Rules for Ships, January 2002
Pt.6 Ch.3 Sec.5 – Page 20
— when the ship has reached approximately 2/3 of full speed
ahead, go quickly to dead slow ahead
— when the r.p.m. is nearly stabilised, go quickly to full
ahead
— when the ship has reached approximately half speed
ahead, go to stop and back to dead slow ahead within 1
second.
102 With air compressors stopped, make 12 starts with the
remote control system, alternatively between ahead and astern.
103 Testing of possible automatic restarts. Go to ahead and
let the engine repeat the predetermined starting at tempts. Go
to stop. Return to ahead and check that an additional starting
attempt is effected.
104 Simulate failures causing automatic load reduction or
stop of the engine. Cancel if possible this safety action and
show that the engine is again controllable from the bridge.
105 During bridge control at half speed ahead, cut out power
supply to the remote control system. No immediate critical situation is to arise. Switch over to standby manual control in the
engine room, and show that this control system functions satisfactorily.
106 At approximately 2/3 of full speed ahead, test the emergency stop system.
B 200 Ships with controllable pitch propeller
201 The tests specified below apply to remote control systems with a single manoeuvring lever on the bridge.
For plants with dual lever control, one for r.p.m. and one for
pitch, the tests to be carried out will be considered in each case.
— start the engine, from the bridge if possible, and go to dead
slow ahead. Proceed stepwise to full ahead. Before each
step increase, the r.p.m. of the previous setting is to have
reached its steady state condition
— from approximately 2/3 of full speed ahead, go quickly to
dead slow astern. Proceed stepwise to full astern
— go to neutral position
— after approximately 5 minutes in neutral position, go to
ahead
— when the ship has reached approximately 2/3 of full speed
ahead, go quickly to 2/3 of full astern
— when the ship is «dead in the water», go quickly to half
ahead.
202 Simulate failures causing automatic load reduction or
stop of the engine. Cancel if possible this safety action and
show that the engine is again controllable from the bridge.
203 During bridge control at half speed ahead, cut out power
supply to the remote control system. No immediate critical situation is to arise. Switch over to standby manual control in the
engine room, and show that this control system functions satisfactorily.
204 At approximately 2/3 of full speed ahead, test the emergency stop system.
B 300 Steam turbine ships
301 The test programme should as a minimum include:
— from stop to dead slow ahead. Proceed stepwise to full
ahead. Before each step increase, the r.p.m. of the previous
setting is to have reached its steady state condition
— from full speed ahead, reduce stepwise to stop with the
same intervals
— from stop, increase stepwise to full astern. Run until the
ship has reached a fair speed astern
— from full astern, reduce stepwise to stop
— show that the automatic turning arrangement operates satisfactorily during the stop period. Go to full ahead
— after approximately 10 minutes full ahead, go quickly to
stop
— after approximately 5 minutes stop, go quickly to 2/3 of
full astern
— when the ship is «dead in the water», go quickly to full
ahead
— when the ship has reached approximately 2/3 of full speed
ahead, go quickly to 2/3 of full astern and run until the ship
is «dead in the water»
— go to full ahead. When the ship has reached approximately
2/3 of full speed ahead, go to stop and back to dead slow
ahead within 1 second. Transfer control to the engine
room.
302 Repeat the first four manoeuvres using the manoeuvring
system in the engine room. Transfer control to the bridge.
303 During bridge control at half speed ahead, cut out power
supply to the remote control system. No immediate critical situation is to arise. Switch over to standby manual control in the
engine room, and show that this control system functions satisfactorily.
304 Simulate failures causing automatic load reduction or
stop of turbines. Cancel, if possible, this safety action and
show that the turbines are again controllable from the bridge.
305 At approximately 2/3 of full speed ahead, test the emergency stop system.
C. Testing of Boiler Plant. Guidance
C 100 Automatic control system for auxiliary boilers
101 The system is to be tested by varying the boiler load as
specified in 102. Recording of the following parameters may
be required:
— steam pressure (primary and secondary system)
— water level in boiler
— automatic actions such as start and/or stop of burners,
alarms, etc.
102 Boilers serving turbogenerators. One boiler in operation:
— increase load from minimum to full load during a period
of minimum 15 minutes
— reduce load from full load to minimum during a period of
minimum 15 minutes
— increase load suddenly to minimum 50% of full load by
connecting one of the greater consumers
— when stationary conditions are reached, reduce load suddenly to minimum.
Parallel operation of two boilers:
— increase load suddenly to minimum 30% of full load, by
connecting one of the greater consumers
— when stationary conditions are reached, reduce load suddenly to approximately 5% of full load and keep that load
until stationary conditions are reached.
C 200 Automatic control system for main boilers
201 The system is to be tested by varying the boiler load as
specified in 202. Recording of the following parameters may
be required:
—
—
—
—
—
—
—
steam flow (alternatively position of control valve)
steam pressure
temperature of superheated steam
water level in boiler
water level in condenser and deaerator
fuel oil temperature or viscosity
excess of combustion air in exhaust gas.
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Rules for Ships, January 2002
Pt.6 Ch.3 Sec.5 – Page 21
202 The boiler load is to be varied in accordance with the
manoeuvring tests specified in B300. The boiler plant testing
may be carried out simultaneously with testing of the remote
control system for the main turbines.
C 300 Monitoring system
301 With all burners in operation, the fuel oil supply to one
of the burners is to be shut off. Check that the flame detector
of this burner is functioning. The remaining burners are to be
tested in the same way.
302 With burners in operation, one of the flame detectors is
to be shielded. Check that the automatic shutoff valve for fuel
oil is operating. The remaining flame detectors are to be tested
in the same way.
303 With boiler in operation, simulate a failure causing automatic stop of combustion air fan. Check that the fuel oil supply
is shut off.
304 Reduce water level below safety limit and check that
fuel oil supply is shut off.
305 Remaining alarms and safety actions are to be initiated
by simulating failures as realistically as practicable.
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