Document Number: ECP 11-0512f
Date: 04/12/2015
LUCY VRN6A WITH MICOM P124S RELAY TEST FORM
Substation Name
Substation Number
Voltage
Switchgear
Installed Mode
Free-standing
()
Transformer-mounted
Switchboard Number
Manufacturer
Lucy
Serial Number
Type
VRN6a
()
Protection CTs
CT Ratio (400/1 or 800/1)
Relay
Serial Number
Shunt Trip Coil (if fitted)
24-110V DC/110-240V AC
()
Protection Settings (specified by planner/designer)
Overcurrent Settings
Earth Fault Settings
Setting Current
Setting Current
Curve
Curve
Time Multiplier
Time Multiplier
Highset Setting Current
Highset (or SEF) Setting Current
Highset Time
Highset (or SEF) Time
Preliminary Checks
()
Disconnect the umbilical cable from the RTU (if fitted)
Visual inspection satisfactory (no visible signs of damage etc)
Earthing satisfactory
SF6 gas pressure satisfactory
Functional/Interlock Checks
Open and close switches
Earth switches cannot be operated when service selected
Switch/circuit-breaker cannot be operated when earth selected
Open and close earth switches
Test access/earth star bar cannot be opened when switch/circuit-breaker in On/Off
Test access/earth star bar can be opened when earth switch closed
Switch/circuit-breaker cannot be operated when test access open
()
THIS IS AN UNCONTROLLED DOCUMENT, THE READER MUST CONFIRM ITS VALIDITY BEFORE USE
Version: 4.0
Lucy VRN6a with MiCOM P124S Relay Test Form
Document Number: ECP 11-0512f
Version: 4.0
Date: 04/12/2015
Functional/Interlock Checks
()
Actuator operation satisfactory using an RTU simulator (LPN Remsdaq RTU only)
Transformer Winding Insulation Resistance using Test Voltage from ECS 11-0006
(transformer-mounted units only)
HV windings to earth (LV windings connected together and to earth)
M
LV windings to earth (HV windings connected together and to earth)
M
Switchgear Continuity Test
Switch/Circuit- breaker Position
Terminals Under Test
RSW1
TM*
FS*
RSW2
CB
Continuity
TM*
FS*
RSW1 to RSW2
RSW1 to RSW2 to CB
Closed
Closed
Open
Closed
L1 - L1
L1 - L1 - L1

Closed
Closed
Open
Closed
L2 - L2
L2 - L2 - L2

Closed
Closed
Open
Closed
L3 - L3
L3 - L3 - L3

Closed
Open
Closed
L1 - L2 (RSW1)

Closed
Open
Closed
L2 - L3 (RSW1)

RSW1
RSW2
CB
Terminals Under Test
Earthed
Open
Open
RSW1
Open
Earthed
Open
RSW2
Continuity
L1 - E

L2 - E

L3 - E

L1 - E

L2 - E

L3 - E

HV Insulation Tests using Test Voltage from ECS 11-0006
RSW1
RSW2
CB
Terminal
Voltage
(kV)
Under
Test
Earthed
TM*
FS*
RSW1
RSW2
Closed
Closed
Open
Closed
L1
L2, L3
Closed
Closed
Open
Closed
L2
L1, L3
Closed
Closed
Open
Closed
L3
L1, L2
Open
Closed
Open
Closed
L1, L2,
L3
L1, L2,
L3
Closed
Open
Open
Open
L1, L2,
L3
L1, L2,
L3
Duration
(min)
IR
(M)
CB
(FS* only)
L1, L2, L3
* TM - transformer-mounted and FS - free-standing.
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Lucy VRN6a with MiCOM P124S Relay Test Form
Document Number: ECP 11-0512f
Version: 4.0
Date: 04/12/2015
RSW1 FPI CT Tests (test from marshalling box – refer to Figure 5 and Figure 2)
Disconnect CT wires C410/1, C430/1 and C450/1 from the left-side of the shorting block
()
Check earth continuity
()
C510/1 - C530/1 - C550/1 - earth
Disconnect wire C90
()
Measure earth insulation resistance
C510/1 - C530/1 - C550/1 - earth
Measure L1 CT loop continuity
C410/1 - C510/1

Measure L2 CT loop continuity
C430/1 - C530/1

Measure L3 CT loop continuity
C450/1 - C550/1

Reconnect wire C90
Check earth continuity
M
()
C510/1 - C530/1 - C550/1 - earth
Reconnect CT wires C410/1, C430/1 and C450/1to left-side of shorting block
()
()
RSW2 FPI CT Tests (test from marshalling box – refer to Figure 5 and Figure 2)
Disconnect CT wires C410/2, C430/2 and C450/2 from the left-side of the shorting block
()
Check earth continuity
()
C510/2 - C530/2 - C550/2 - earth
Disconnect wire C90
()
Measure earth insulation resistance
C510/2 - C530/2 - C550/2 - earth
Measure L1 CT loop continuity
C410/2 - C510/2

Measure L2 CT loop continuity
C430/2 - C530/2

Measure L3 CT loop continuity
C450/2 - C550/2

Reconnect wire C90
Check earth continuity
M
()
C510/2 - C530/2 - C550/2 - earth
Reconnect CT wires C410/2, C430/2 and C450/2to left-side of shorting block
© UK Power Networks 2017 All rights reserved
()
()
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Lucy VRN6a with MiCOM P124S Relay Test Form
Document Number: ECP 11-0512f
Version: 4.0
Date: 04/12/2015
FPI CT
connections
(disconnect for
FPI CT tests)
FPI Connections
FPI CT shorting
block (CTs
shorted when
output wires
disconnected)
C90 (disconnect
for FPI CT tests)
FPI CT common
connections
Figure 1 – FPI CT Connections in Marshalling Box
L1 FPI CT
Marshalling Box
L2 FPI CT
L3 FPI CT
Shorting Block
FPI/RTU
C410
C411
C430
C431
C450
C451
C76
C90
C510
C530
C550
Based on Lucy FPI schematic drawing THM0008215 and THM0008244
Figure 2 – FPI CT Schematic Drawing
Refer to Appendix C for FPI schematic diagrams.
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Lucy VRN6a with MiCOM P124S Relay Test Form
Document Number: ECP 11-0512f
Version: 4.0
Date: 04/12/2015
Protection CTs Insulation Resistance using 1kV Test Voltage
(test from marshalling box – refer to Figure 4 and Figure 5 overleaf)
Check circuit-breaker selector switch is in the service position
()
Remove relay from the case (move nylon catch under flap to release relay)
()
Remove CT wiring earth link
C70 - C90
()
Measure the insulation resistance
C70 - C90 (Earth)
M
Replace CT wiring earth link
C70 - C90
()
Protection CTs Loop Continuity
(from CT wiring terminal block)
Disable the automatic protection CT shorting by separating the contacts in the relay
housing as shown in Figure 3
()
Measure L1 CT continuity
C11 - C70

Measure L2 CT continuity
C31 - C70

Measure L3 CT continuity
C51 - C70

Re-enable protection CT shorting
()
Figure 3 – Disable Protection CT Shorting
Relay Case Resistance
Measure the resistance between the relay case and the switchgear earth
Insert relay back into case
© UK Power Networks 2017 All rights reserved

()
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Lucy VRN6a with MiCOM P124S Relay Test Form
Document Number: ECP 11-0512f
Version: 4.0
Date: 04/12/2015
See below
Figure 4 – Marshalling Box
Protection CT
Test Connections
Earth link C70C90
Figure 5 – Protection Connections in Marshalling Box
Refer to Appendix C for protection schematic diagrams.
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Lucy VRN6a with MiCOM P124S Relay Test Form
Document Number: ECP 11-0512f
Version: 4.0
Date: 04/12/2015
Protection CT Ratio
()
Remove CT ratio plate from front panel
Select the appropriate CT ratio
CT Ratio
Shorting Link
Across Terminals
Setting
200/1
4, 5, 6, 7
20-400A
()
600/1
1, 2, 3, 4
60-1200A
()
Test Protection Settings
Plug in relay battery box to power up relay
()
Apply the following temporary settings to the relay (refer to Appendix C for guidance)
()
Overcurrent Settings
I>
Earth Fault Settings
80A
200/1
0.4 In
600/1
0.13 In
Ie>
60A
Delay Type
IDMT
Delay Type
IDMT
Idmt
IEC SI
Idmt
IEC SI
Tms
1.5
Tms
1.5
I>>
No
Ie>>
No
I>>>
No
Ie>>>
No
200/1
0.3 Ien
600/1
0.1 Ien
Relay Operation - Primary Injection Test
Ensure battery box is plugged into relay (this is required because some of the above settings maybe
below the minimum operating current of the relay)
Increase current until ALARM is displayed on the LCD. Reset the relay and, if necessary, close the
circuit breaker before each test
Overcurrent Pickup Test
RSW1
RSW2
CB
Conductors
Under Test
Short
Conductors
RSW1
CB
I>
Setting
Calculated
Pickup Current
(1.1 x I>)
Actual Pickup
Current
Closed
Open
Closed
L1 - L2
L1, L2, L3
80A
88A
A
Closed
Open
Closed
L2 - L3
L1, L2, L3
80A
88A
A
Ie>
Setting
Calculated
Pickup Current
(1.1 x Ie>)
Earth Fault Pickup Test
RSW1
RSW2
CB
Conductors Under Test
RSW1
CB
Actual Pickup
Current
Closed
Open
Closed
L1
L1
60A
66A
A
Closed
Open
Closed
L2
L2
60A
66A
A
Closed
Open
Closed
L3
L3
60A
66A
A
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Lucy VRN6a with MiCOM P124S Relay Test Form
Document Number: ECP 11-0512f
Version: 4.0
Date: 04/12/2015
In-service Protection Settings
Apply the in-service protection settings as specified by the planner/designer to the relay and
record them below (refer to Appendix A for guidance)
Overcurrent Settings
()
Earth Fault Settings
CT Ratio
Primary Setting Current
Primary Setting Current
I> (Yes/No)
Ie> (Yes/No)
I> (Primary Setting Current ÷ CT Ratio)
Ie> (Primary Setting Current ÷ CT Ratio)
IDMT Curve Type
IDMT Curve Type
Tms
Tms
Highset Primary Setting
Highset Primary Setting
I>> (Yes/No)
Ie>> (Yes/No)
I>> (Highset Primary Setting ÷ CT Ratio)
Ie>> (Highset Primary Setting ÷ CT
Ratio)
tI>>
tIe>>
In-service Trip Settings
Apply trip settings to the relay – every element used above requires the corresponding trip
command to be set to Yes (refer to Appendix A for guidance)
Trip tI>
Trip tIe>
Trip tI>>
Trip tIe>>
Table A - Calculate Injection Currents
Overcurrent Setting
Setting Current (I> or Ie>)
()
Earth Fault Setting
(I>)
(Ie>)
(I>>)
(Ie>>)
2 x Secondary Setting Current
5 x Secondary Setting Current
Highset (I>> or Ie>>)
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Lucy VRN6a with MiCOM P124S Relay Test Form
Document Number: ECP 11-0512f
Version: 4.0
Date: 04/12/2015
Table B - Calculate Operating Times
Overcurrent Setting
Curve
Time Setting
Earth Fault Setting
(I>)
(Ie>)
(Tms)
(Tms)
(tI>>)
(tIe>>)
Tripping time at 2x secondary current
Curve SI
(Tms x 10s) + 0.09s
s
s
Curve VI
(Tms x 13.5s) + 0.09s
s
s
Curve EI
(Tms x 26.67s) + 0.09s
s
s
Tripping time at 5x secondary current
Curve SI
(Tms x 4.28s) + 0.09s
s
s
Curve VI
(Tms x 3.38s) + 0.09s
s
s
Curve EI
(Tms x 3.33s) + 0.09s
s
s
Tripping time at I>>, Ie>>
Overcurrent Highset
tI>> + 0.09s
s
s
Earth Fault Highset
(SEF)
tIe>> + 0.09s
s
s
Relay Operation - Secondary Injection Test
Connect timer circuit to terminals 33 (L3/3) and 35 (L5/3) in the marshalling cabinet
(contact closed when CB open)
()
Overcurrent Test
Setting
Calculated
Injection Current
(from table A)
Calculated
Operating Time
(from table B)
Actual Operating Times
C11 - C31
C31 - C51
C51 - C11
2x
A
s
s
s
s
5x
A
s
s
s
s
Highset
A
s
s
s
s
Earth Fault Test
Setting
Calculated
Injection Current
(from table A)
Calculated
Operating Time
(from table B)
Actual Operating Times
C11 - C72
C31 - C72
C51 - C72
2x
A
s
s
s
s
5x
A
s
s
s
s
Highset
A
s
s
s
s
SEF*
A
s
s
s
s
* The trip current may have to be increased to operate the circuit breaker if the current is below the
minimum operating current.
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Lucy VRN6a with MiCOM P124S Relay Test Form
Document Number: ECP 11-0512f
Version: 4.0
Date: 04/12/2015
Shunt Trip and Emergency Trip (if fitted)
Check correct shunt trip coil voltage is selected
()
Test
Coil
Marshalling
Box Terminals
Test Voltage
CB Trips
Apply 70% (dc) or 85% (ac) of
coil rated voltage
24-110V DC/
110-240V AC
41 - 42
V
()
Apply 110% of coil rated voltage
24-110V DC/
110-240V AC
41 - 42
V
()
Check emergency trip button operates circuit-breaker
()
Final Checks
()
Check correct protection settings applied
Check relay reset
Remove battery box from relay
Ensure FPI CT shorting-link(s) are replaced if CTs are not used or not connected to
FPI or RTU
Reconnect umbilical cable to RTU (if fitted)
Asset data form completed
Test Equipment
Make/Type
Serial Number
Calibration Date
Certification
()
All tests have been completed satisfactorily
Comments
Commissioning
Engineer
Signature
Date
The completed test form shall be left on-site in a plastic wallet and in secure location.
A copy of the completed test shall be sent to the relevant ART mailbox.
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Lucy VRN6a with MiCOM P124S Relay Test Form
Document Number: ECP 11-0512f
Version: 4.0
Date: 04/12/2015
Appendix A – MiCOM P124S
A.1
Introduction
The MiCOM P124S is a self powered three phase overcurrent and earth fault protection
relay. Settings are applied and fault reports read using the LCD display and the control
buttons on the front panel (see section A.3).
A battery box is available to power the relay during commissioning. The battery box is
plugged into the serial port under the lower panel on the front of the relay (section A.4).
Note: The minimum operating current of the relay is 20% of the CT primary current. The
operating time of the VRN6a circuit breaker is 80 to 100ms.
A.2
Programming
The keypad has seven keys divided into two groups:


The
and
keys situated immediately under the screen are dedicated to reading
and acknowledging alarms.
The other five keys situated below these are used for programming the relay and
navigating the menu system (a map of the menu system is shown in section A.5). The
directional keys
either move through the various levels of the menu or are
used to change settings. The
key validates a choice or applied value. The general
menu navigation is left
and right
to scroll through the main menu headings.
Pressing down
will enter the menu selected and allow you to scroll through the
various options.
For example, applying the following typical settings to a MiCOM P124S relay used with
200/1 CTs:
Protection Function
Protection Setting
Relay Equivalent Setting
OC
200A VI 0.1TM
1 In
OCHS
1200A
6 In
EF
100A SI 0.1TM
0.5 Ien
SEF
32A DT 3s
0.16 Ien
Note: Various settings, such as the selection of the various thresholds, time delays, trip
settings etc are password protected and when accessing these menus a password entry is
required. By default this is set to AAAA and will already be entered when the password
prompt appears on the LCD. To proceed past this screen press the
key.
First the CT ratio must be set in the relay:

From the default current display press down
PARAMETERS will be displayed on the LCD.


Press right
Press down
to display the main menu, OP
to navigate to the CONFIGURATION menu.
to display the CT Ratio.
© UK Power Networks 2017 All rights reserved
A-1
Lucy VRN6a with MiCOM P124S Relay Test Form
Document Number: ECP 11-0512f
Version: 4.0
Date: 04/12/2015

Press down
appear.

Press left
or right
to select the digit to change and up
or down
to alter the
digit selected.
Confirm the new entry with the
key - the new Line CT primary value should be
displayed. For 200/1 CTs this should be set to 200.
Press down
again to E/Gnd CT primary and set this to 200 also.
The CT ratios have now been set, press up
to return to the CONFIGURATION main
menu.



to Line CT primary, then
to edit the value, a blinking cursor should
Next apply the relay settings as below:

























Use right
to navigate to the PROTECTION menu.
Press down
to display [50/51] Phase OC.
Press down
to the overcurrent selection I> ? screen.
Press
to edit and up
or down
to change to Yes, confirm by pressing
again.
Press down
to I> and edit to set the current as a proportion of the CT primary, for a
200/1 CTs with a 200A setting this should be set to 1 In.
Press down
to display the Delay Type - set to IDMT.
Press down
again to display Idmt - set to IEC VI.
Press down
again to display Tms - set to 0.1.
Press down
again to display I>> ? - set to Yes.
Press down
again to display I>> - set to 6.
Press down
again to display Delay Type - set to DMT.
Press down
again to display tI>> - set to 0s.
Press down
again to display I>>> ? - set to No (unless additional overcurrent
settings sre required).
Press up
to return to the [50/51] Phase OC menu.
The earth fault settings can be set using the same method but applied to the [50N/51N]
E/Gnd menu under PROTECTION.
As a setting of 100A is required, this should be applied by setting Ie> to 0.5 Ien.
Press down
to display the Delay Type - set to IDMT.
Press down
again to display Idmt - set to IEC SI.
Press down
again to display Tms - set to 0.1.
Press down
again to display Ie>> ? - set to Yes.
Press down
again to display Ie>> - set to 0.16.
Press down
again to display Delay Type - set to DMT.
Press down
again to display tIe>> - set to 3s.
If further earth fault settings are required they should be implemented using the Ie>> and
Ie>>> menus. If not required, ensure these are not enabled by setting them to No.
The protection settings have now been entered, press up
to return to the
PROTECTION main menu.
Finally, the relay must be set to ensure that it will trip for the settings selected:



Navigate to the AUTOMAT. CTRL main menu and press down
to Trip Commands.
Press down
to navigate through the various settings to trip on.
With the example settings set Trip tI> to Yes, Trip tI>> to Yes, Trip tIe> to Yes and set
Trip tIe>> to Yes. All other trips should be set to No.
The required relay settings have now been applied.
© UK Power Networks 2017 All rights reserved
A-2
Lucy VRN6a with MiCOM P124S Relay Test Form
Document Number: ECP 11-0512f
Version: 4.0
Date: 04/12/2015
A.3
Front Panel
A.4
Battery Box (material code 13945R)
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A-3
Lucy VRN6a with MiCOM P124S Relay Test Form
Document Number: ECP 11-0512f
Version: 4.0
Date: 04/12/2015
A.5
Menu Structure
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A-4
Lucy VRN6a with MiCOM P124S Relay Test Form
Document Number: ECP 11-0512f
Version: 4.0
Date: 04/12/2015
To disable
relay set all
trips to 'No'
Appendix B – MiCOM P124S – Disable Relay Tripping Function
© UK Power Networks 2017 All rights reserved
B-1
Lucy VRN6a with MiCOM P124S Relay Test Form
Document Number: ECP 11-0512f
Version: 4.0
Date: 04/12/2015
Appendix C – VRN6a Schematic Diagrams
THM 0004977 – MiCOM P124S
THM 0008215 – Nortroll CableTroll 2350 Switch 1
THM 0008244 – Nortroll CableTroll 2350 Switch 2
Note: A full set of Lucy SABRE A drawings are contained in ECP 11-0511z Lucy SABRE A
Schematic Drawings.pdf.
© UK Power Networks 2017 All rights reserved
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Lucy VRN6a with MiCOM P124S Relay Test Form
Document Number: ECP 11-0512f
Version: 4.0
Date: 04/12/2015
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Lucy VRN6a with MiCOM P124S Relay Test Form
Document Number: ECP 11-0512f
Version: 4.0
Date: 04/12/2015
© UK Power Networks 2017 All rights reserved
C-3
Lucy VRN6a with MiCOM P124S Relay Test Form
Document Number: ECP 11-0512f
Version: 4.0
Date: 04/12/2015
© UK Power Networks 2017 All rights reserved
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