TRANSMISSION
TESTING SERVICES
POWER CABLE TEST RESULTS
Report number
Date of test
Substation
Feeder number/name
Rated voltage
Cable type
Cable termination – End 1
Cable termination – End 2
Cable termination – End 3
Cable route length
Atmospheric temp (°C)
Humidity (%)
Reason for test
Summary of tests
Relevant Standard
1. Phasing check
MMI 0025 clause 5.2.1 or SDI 120 clause 5.7.4
2. Continuity
MMI 0025 clause 5.2.1 or SDI 120 clause 5.7.1
3. Serving – insulation resistance
MMI 0025 clause 5.2.1 or SDI 120 clause 5.7.6
4. Serving – HV withstand
MMI 0025 clause 5.2.1
5. CCPU and link box tests
MMI 0025 clause 5.2.1
6. Main conductor – insulation resistance
MMI 0025 clause 5.2.1 or SDI 120 clause 5.7.6
7. Main conductor – HV Withstand
(one of following options required)
a) HV test supply
b) 24hr soak (PM to arrange)
8. Main conductor – DC leakage current
(Paper insulated cable only)
9. Main conductor – partial discharge
(one of following options required)
a) Off – line
b) On – line
10. Main conductor – DDF (VLF)
11. Zero and positive sequence impedance
Results
MMI 0025 clause5.2.1 or SDI 120 clause 5.7.6
MMI 0025 clause 5.2.1 or SDI 120 clause 5.7.6.2
MMI 0025 clause 5.2.1 or SDI 120 clause 5.7.6
MMI 0025 clause 5.2.1 or SDI 120 clause 5.7.6.2
MMI 0025 clause 5.2.1 or SDI 120 clause 5.7.6.2
HVT 0001 section 14 – Report only (when VLF is used for test 7)
MMI 0025 clause 5.2.1. Limit - Comparable to
calculated results from protection design.
Test data stored at G:\TIS\TESTSERV\TEST
RESULTS……
Refer to Standards – SDI 535, MMI 0025 (transmission cables) and SDI 120 (distribution cables) for required tests, test
voltages and acceptable limits.
Refer to procedure – GNV 1094.7 for test methodology.
Comments/conclusion
Tested by
FNV 1111 – July 2014
Service no.
Reported by
GNV 1094.7
Service no
Page 1 of 7
Detail of Tests Results
1. Phasing check
Limit – (Transmission and distribution) conforms to local network
Phase
Termination – End 1
Termination – End 2
Termination – End 3
A
B
C
2. Continuity
Limit – (Transmission only) No main conductors open circuit
Connection
Continuity
Result
Instrument no.
3. Serving – insulation resistance
Limit
(Transmission) PVC sheath 1.5MΩ/km, HDPE 110MΩ/km, mixed 55MΩ/km
(Distribution) new cable 55MΩ, old cable 10MΩ
Connection
Test voltage
Test duration
1kV DC
1 minute
Insulation resistance
Result
Instrument no.
4. Serving – high voltage withstand
Limit
(Transmission) – Always required. No disruptive discharge at 5kV DC
(Distribution – only required on special request) No disruptive discharge at 5kV DC for new
cables. 2.5kV DC for cables more than 20 years old.
Connection
Test voltage
(kV DC)
Test duration
Leakage current
Result
1 minute
Instrument no.
FNV 1111 – July 2014
GNV 1094.7
Page 2 of 7
5. Cable covering protection units (CCPU) sheath voltage limiters (SVL) and link boxes
Note: Tests on CCPC/SVL may be best carried out prior to installation of link boxes
Limit
(Transmission only)
Insulation resistance – Report only
Ref V and I – Meets manufacturer’s specifications (project manager to supply specs)
Location 1 –
Manufacturers ratings
Connection
Rated
voltage
kV
Reference
voltage
kV
Test results
Reference
current
mA
Insulation
resistance
@
1kV DC
Measured
current
@
reference
voltage
mA DC
Measured
voltage
@
reference
current
kV DC
Result
Instrument no.
Location 2 –
Manufacturers Ratings
Connection
Rated
Voltage
kV
Reference
Voltage
kV
Reference
Current
mA
Test Results
Insulation
Resistance
@
1 kV DC
Measured
Current
@
Reference
Voltage
mA DC
Measured
Voltage
@
Reference
Current
kV DC
Result
Instrument no.
Location 3 –
Manufacturers ratings (Ref AS 1307)
Connection
Rated
voltage
kV
Reference
voltage
kV
Reference
current
mA
Test results
Insulation
resistance
@
1kV DC
Measured
current
@
reference
voltage
mA DC
Measured
voltage
@
reference
current
kV DC
Result
Instrument no.
FNV 1111 – July 2014
GNV 1094.7
Page 3 of 7
On completion of tests – All links confirmed sound and all boxes sealed
Location 1
Checked by
Location 2
Checked by
Location 3
Checked by
6. Main conductor – isulation resistance
Limit
(Limit only applies to 60 secs reading. Report only for others)
(Distribution)
(Transmission)
New HV XLPE 100GΩ
New LV XLPE 200MΩ
Old HV XLPE 200MΩ
Old LV XLPE 50MΩ
Old HV paper 100MΩ
Old LV paper - report only
Mixed HV 100MΩ
Mixed LV 20MΩ
Report only. Bring IR unbalance coefficients greater than 2.5 to the attention
of Primary Systems
As measured results
Connection
Test voltage
(kV DC)
1kV – Dist
5kV – Trans
15
Secs
60
Secs
N/A
Insulation resistance at
180
600
R60
Secs
Secs
R15
N/A
R600
R60
Result
N/A
Instrument no.
7. Main conductor – high voltage withstand
Limits
(Transmission) No disruptive discharge at appropriate test voltage.
(Distribution – only required on special request) No disruptive discharge at appropriate test voltage.
7.1 (option a) Withstand using HV test supply
(Maximum 1.25Uo when using AC or VLF for paper insulation)
Connection
Test voltage
kV
AC/DC/VLF
Test duration
Result
Instrument no.
FNV 1111 – July 2014
GNV 1094.7
Page 4 of 7
7.2 (Option b) Withstand using 24 hour soak from network supply
This test performed when unable to perform 7.1 due to HV test supply limitation.
Test is arranged by Project Manager and reported separately.
8. Main conductor – DC leakage current (Paper cables only)
Limit
(Transmission) Current stable and maximum unbalance of 2.0
(Distribution – only required on special request) current stable
Percent of target
withstand voltage
Connection
%
Leakage current
(once stable)
µA / mA
kV
Leakage current
unbalance
co-efficient
between phases
Result
@ 100% of withstand voltage
25
50
A-E
75
100
25
50
75
100
25
50
75
100
Instrument no.
FNV 1111 – July 2014
GNV 1094.7
Page 5 of 7
9. Main conductor – partial discharge
Option A – Off line test (AC or VLF)
Limits
Transmission
XLPE - Less than background noise level @ 1.5Uo.
Paper (or mixed paper and XLPE) – Balanced across phases (Max 1.25Uo)
Distribution
Per transmission (only required on special request)
Connection
Background
noise level
pC
Discharge
inception
Discharge
extinction
Partial discharge level (pC) @
Result
1.0Uo
kV
Withstand
voltage
1.5Uo
pC
..…kV
..…kV
..…kV
1.0Uo
kV
..…kV
Notes
PD detector frequency settings
Centre frequency
kHz
Bandwidth
kHz
Calibrated at
..…kV
1.5Uo
pC
Instrument No.
Notes:
1. All voltages phase to earth (Peak/√2)
2. Uo is nominal system voltage phase to earth
Test procedure is as follows:
1. Raise test voltage toward withstand test level.
2. Record inception voltage and PD level.
3. Pause at 1.0Uo and 1.5Uo to record PD levels.
4. Perform withstand test. Record PD level during test period.
5. Reduce test voltage. Pause at 1.5Uo and 1.0Uo to record PD levels.
Record PD extinction voltage
Histogram of PD pattern (as required)
Phase
Test voltage
Notes
Paste image
FNV 1111 – July 2014
GNV 1094.7
Page 6 of 7
Option B – On line test
Limits
(Transmission) No obvious discharge within cable circuit
(Distribution – only required on special request) No obvious discharge within cable circuit
Paste in histograms of results and make comments
10. Main conductor – DDF (only required when VLF withstand test is used)
Limit report only
Test supply frequency ………………..
Paste in image of DDF Vs voltage graph
Limit
Report only
FNV 1111 – July 2014
GNV 1094.7
Page 7 of 7