Download ECP 11-0211 Capacitor Voltage Transformer

Document Number: ECP 11-0211
Date: 30/01/2017
CAPACITOR VOLTAGE TRANSFORMER TEST FORM
Substation Name
Substation Number
Circuit
Project Number
MPAN(S)
Voltage Transformer
L1
L2
L3
VT Group Function
Location
Serial Number
Make
Type
Ratio
Rating
General Checks
Prove tightness of all fastenings
All insulators are undamaged and clean
Gaps of arcing horns or rings
Labelling
Tank oil tests (if filled on site)
Tank oil level
Breather
Main earth bar connections
HF earth rods and connections if fitted
Action of door earth switch
Venting and sealing of terminal chambers
Spark-gap setting, Intermediate terminal to earth. Mechanical check
only, if accessible
CVT calibration tap-settings. Visual check (if accessible) against
nameplate or test certificate
Continuity intermediate terminal to earth
CVT fixed internal burden in ohms (where applicable)
L1
L2
L3
THIS IS AN UNCONTROLLED DOCUMENT, THE READER MUST CONFIRM ITS VALIDITY BEFORE USE
Version: 3.0
Capacitor Voltage Transformer Test Form
Document Number: ECP 11-0211
Version: 3.0
Date: 30/01/2017
VT Insulation Resistance
L1
L2
L3
L1
L2
L3
CVT Secondary Circuit Fuses Functions and Ratings
L1
L2
L3
CVT Secondary Output Tests
L1
L2
L3
L1
L2
L3
Measure and record the insulation resistance at 1kV to earth
Secondary winding 1 to earth
Secondary winding 2 to earth
Secondary winding 1 to secondary winding 2
VT Terminal Box Tests
Continuity of earth connections
Terminal box venting and sealing
Secondary winding insulation resistance
Prove secondary winding earth-link
Secondary output voltage (measured at the various secondary-fuse
outlets with the CVT alive at primary system voltage)
Primary system voltage during test (if value available)
CVT Phasing Tests
Voltages measured between the output terminals L1,
L2 and L3 of the VT under test, and the output
terminals L1r, L2r and L3r of a reference VT of known
phasing
Phases
L1r
L2r
L3r
Phasing tests carried out with respect to VTs of known
phasing on circuit
© UK Power Networks 2017 All rights reserved
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Capacitor Voltage Transformer Test Form
Document Number: ECP 11-0211
Version: 3.0
Date: 30/01/2017
Comments
Test Equipment
Purpose
Make/Type
Serial Number
Certification
()
All tests have been completed satisfactorily
Contractor Commissioning Engineer (if applicable)
Organisation
Name
Date
Signature
UK Power Networks Commissioning Engineer
Name
© UK Power Networks 2017 All rights reserved
Signature
Date
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