RESISTORS in Bulk Oil White - Breaker
description
Transcript of RESISTORS in Bulk Oil White - Breaker
TDR9000 TIMING OF HV OIL CB WITH RESISTORS
Jozef LeviDoble Engineering Company
TDR9000
TIMING OF HV BULK OIL CIRCUIT BREAKERS WITH RESISTORS
TDR9000 TIMING OF HV OIL CB WITH RESISTORS
Introduction
insertion resistor on close
dividing resistors on open and close
bulk oil breakers timing
conclusion
TDR9000 TIMING OF HV OIL CB WITH RESISTORS
two breaking elements per phase
Breaker design
TDR9000 TIMING OF HV OIL CB WITH RESISTORS
closed before main contacts for up to 10 msin series with main contactsmain contact closed - insertion resistors bypassed mechanism opens resistor contacts
insertion resistor on close
TDR9000 TIMING OF HV OIL CB WITH RESISTORS
TDR9000 TIMING OF HV OIL CB WITH RESISTORS
TDR9000 TIMING OF HV OIL CB WITH RESISTORS
TDR9000 TIMING OF HV OIL CB WITH RESISTORS
TDR9000 TIMING OF HV OIL CB WITH RESISTORS
Dividing resistors operation
there is no separate mechanism dedicated to dividing resistors
TDR9000 TIMING OF HV OIL CB WITH RESISTORS
Close operationmoving contact engages with resistor probeno request for high contact pressureresistors are inside main circuit for relatively long time – 40 to 50 ms
TDR9000 TIMING OF HV OIL CB WITH RESISTORS
loose contact produce scattered lines at test results graphics
Close operation
TDR9000 TIMING OF HV OIL CB WITH RESISTORS
Bulk oil circuit breaker timing
Circuit breakers with dividing resistors
bulk oil CB are with two breaking elements test instrument represent results, as there is only one
TDR9000 TIMING OF HV OIL CB WITH RESISTORS
TDR9000 Instrument electronics
Bulk oil circuit breaker timing
Circuit breaker is bistable apparatusIn case resistors are present we have three stages
Open breaker - infinite impedanceClosed breaker - practically zero impedance Resistors in circuit – definite impedance
TDR9000 TIMING OF HV OIL CB WITH RESISTORS
TDR9000 Instrument electronics
Bulk oil circuit breaker timing
TDR9000 is equipped with electronics comparatorDifferent combinations of comparatorsdetect different stages
TDR9000 TIMING OF HV OIL CB WITH RESISTORS
GE FK 439
Bulk oil circuit breaker timing
TDR9000 detect resistor when resistorchannels are open in test plantesting was performed with and without opening resistor channels
TDR9000 TIMING OF HV OIL CB WITH RESISTORS
GE FK 439
Bulk oil circuit breaker timing
graphic presentation on Close resistor channels open
TDR9000 TIMING OF HV OIL CB WITH RESISTORS
GE FK 439
Bulk oil circuit breaker timing
graphic presentation on Trip resistor channels open
TDR9000 TIMING OF HV OIL CB WITH RESISTORS
GE FK 439
Bulk oil circuit breaker timing
graphic presentation on Close resistor channels are not open
TDR9000 TIMING OF HV OIL CB WITH RESISTORS
GE FK 439
Bulk oil circuit breaker timing
graphic presentation on Trip resistor channels are not open
TDR9000 TIMING OF HV OIL CB WITH RESISTORS
Conclusions
majority of bulk oil breakers are withoutinsertion resistors on Close
dividing resistors are used for higher voltages
perform test with and without resistors channel open
overlay results
TDR9000 TIMING OF HV OIL CB WITH RESISTORS
Thank you for listening