Download ECP 11-0511c Schneider CN2 and CE2 Test Form

Document Number: ECP 11-0511c
Date: 25/11/2015
SCHNEIDER CN2 AND CE2 TEST FORM
Substation Name
Substation Number
Voltage
Switchgear
Installed Mode
Free-standing
()
Switchboard Number
Manufacturer
Serial Number
Type
Transformer-mounted
()
Schneider
Protection CTs
Ratio in Use
TLF
Rating
Transformer Rating
Preliminary Checks
kVA
()
Visual inspection satisfactory (no visible signs of damage etc)
Earthing satisfactory
SF6 gas pressure satisfactory
Functional/Interlock Checks
()
Open and close circuit-breaker
Earth switches cannot be operated when service selected
Circuit-breaker cannot be operated when earth selected
Open and close earth switches
Test access cannot be opened when circuit-breaker in On and Off position
Test access can be opened when earth switch closed
Circuit-breaker cannot be operated when test access open
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
THIS IS AN UNCONTROLLED DOCUMENT, THE READER MUST CONFIRM ITS VALIDITY BEFORE USE
Version: 4.0
Schneider CN2 and CE2 Test Form
Document Number: ECP 11-0511c
Version: 4.0
Date: 25/11/2015
Switchgear Continuity Test
Circuitbreaker
Terminals Under Test
Circuitbreaker
Terminals Under Test
Closed
L1 - L1

Earthed
L1 - E

L2 - L2

L2 - E

L3 - L3

L3 - E

Continuity
Continuity
HV Insulation Tests using Test Voltage from using Test Voltage from ECS 11-0006
Circuit-breaker
Closed
Open
Terminals
Under Test
Earthed
L1
L2, L3
L2
L1, L3
L3
L1, L2
L1, L2, L3
L1, L2, L3
Voltage
(kV)
Duration
(min)
IR (M)
Protection CTs Insulation Resistance using 1kV Test Voltage
Remove CT wiring earth link
C70 - C90
()
CTs, AC trip coils and TLFs
C70 - Earth
M
Replace CT wiring earth link
C70 - C90
()
Protection CTs Loop Continuity
(test CT and trip coil from TLF ratio terminal block with test link removed)
Remove shorting link and test link
()
100/5 Ratio
50/5 Ratio
L1
C110 - C70

C210 - C70

L2
C130 - C70

C230 - C70

L3
C150 - C70

C250 - C70

Replace shorting link and test link
()
Test Link
C90-C70
C110-C130-C150-C70-C210-C230-C250
100/5
50/5
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2 of 4
Schneider CN2 and CE2 Test Form
Document Number: ECP 11-0511c
Version: 4.0
Date: 25/11/2015
Primary Injection Test (free-standing units only)
Earth Fault Release Test
Remove TLFs and replace with shorting links
()
CB
Conductors Under Test
CT
Ratios
Trip Range
Closed
L1 - L1
50/5
20 - 26.5A
A
100/5
25 - 31A
A
50/5
20 - 26.5A
A
100/5
25 - 31A
A
50/5
20 - 26.5A
A
100/5
25 - 31A
A
L2 - L2
L3 - L3
Trip Current
Overcurrent Release Test
Remove TLF shorting-links, connect shorting-link to L1, L2, L3 on one side
CB
Conductors
Under Test
Closed
L1 - L2
Short
Conductors
L2 - L3
()
CT
Ratios
Trip Range
Trip Current
50/5
20 - 25A
A
100/5
30 - 36A
A
50/5
20 - 25A
A
100/5
30 - 36A
A
Secondary Injection Test (transformer-mounted units only)
Earth Fault Release Test
Remove TLFs and replace with shorting links
()
CB
Test Connections
CT
Ratios
Trip Range
Trip Current
Closed
C31 - C70
50/5
2 - 2.65A
A
100/5
1.25 - 1.55A
A
Overcurrent Release Test
Remove shorting links
()
Circuit-breaker
Test Connections
CT
Ratios
Trip Range
Closed
C11 - C31
50/5
1.6 - 2.2A
A
100/5
1.4 - 2.0A
A
50/5
1.6 - 2.2A
A
100/5
1.4 - 2.0A
A
C31 - C51
Trip Current
Note: If the circuit-breaker does not operate when the injected current is gradually applied
then the maximum value of current should be applied instantaneously.
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3 of 4
Schneider CN2 and CE2 Test Form
Document Number: ECP 11-0511c
Version: 4.0
Date: 25/11/2015
Final Checks
()
Check correct CT ratio selected
Check correct TLF rating selected and fitted
Check all links are replaced and secure
Asset data form completed and submitted
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.
© UK Power Networks 2017 All rights reserved
4 of 4
Schneider CN2 and CE2 Test Form
Document Number: ECP 11-0511c
Version: 4.0
Date: 25/11/2015
Appendix A – CN2/CE2 Schematic Diagram
© UK Power Networks 2017 All rights reserved
A-1