Dynamic voltage drop measurement - Breaker.pdf

Dynamic voltage drop measurement

Jozef LeviDoble Engineering Company

Dynamic voltage drop measurement

High voltage breaker - contact system

Typical contact configuration

Contact material

Dynamic voltage drop measurement

Timing circuit breaker

first contact

contact bounce

closed

open Time (ms)

1

0

Closing operation – Timing result

Low injected currentMultiple current break

Dynamic voltage drop measurement

High direct current injectedTrip free operation Voltage drop measurement across terminals

Measurement

Dynamic voltage drop measurement

Trip free operationBreaker open

Breaker in open position

Dynamic voltage drop measurement

Dynamic voltage drop measurement

Power source

Trip free operationBreaker closed

Power source

Dynamic voltage drop measurement

voltage drop

current

TDR9000

TDR9000 with Event Module

Trip free operationOpening breaker

Dynamic voltage drop measurement

Breaker in open position

Trip free operationBreaker open

Dynamic voltage drop measurement

current

voltage drop acrossterminals

time(ms)Volta

ge d

rop

(V)

Dynamic voltage drop measurement

vibration during contactpenetration

main contact closed

arcing contactopen

Volta

ge d

rop

(V)

time(ms)

Dynamic voltage drop measurement

main contact open

arcing contact radius arcing contactopen

Volta

ge d

rop

(V)

time(ms)

Dynamic voltage drop measurement

Overlaid results

one contact shorter

main contactopen

Volta

ge d

rop

(V)

time(ms)

Dynamic voltage drop measurement

Analog result

Digital result

Dynamic voltage drop measurement

Different breakersSF6 breakers Bulk oil breaker

Test results

Air blast breaker

Dynamic voltage drop measurement

GE FK 38

time(ms)

Voltage drop(V)

CLOSED

OPEN

Main contacts

Power source

Dynamic voltage drop measurement

ALSTOM (AEG) Sw145

Dynamic voltage drop measurement

Mitsubishi 100SFMT

Dynamic voltage drop measurement

Delle PK-6

DC current

voltage dropContact system

Dynamic voltage drop measurement

Energomex SFE16-2

current

voltage drop

Closing operation

main contact

Dynamic voltage drop measurement

Energomex SFE16-2

main contact

main

contact

Voltage drop

Dynamic voltage drop measurement

Thank you for listening