Loading ...
Certain OR distant external faultsmay causeCT saturation
The latter allows to accelerate tripping of internal faults with high fault currentscauseCT saturation
a high alternating current(passive) caused bya C.T. saturation
The burden value ... low enoughto preventCT core saturation
a design method of iron - cored CTs for use with protective relaysto preventCT saturation
the minimum pu currentcausingCT saturation
the line CTsresultingfrom CT saturation
the DC component of the unsymmetrical start - up(passive) is caused byThe CT saturation
This large DC offset coupled with higher lead resistancecausedCT saturation
Severe external faultmay causeCT saturation
delayed operation ... the DC offsetcausesCT saturation
a decaying direct current component in the magnetizing inrush current(passive) caused byCT ) saturation
a slowly decaying DC component which will be the case if a system fault is initiated at or close to the zero crossing point of the system voltage(passive) may be caused byCT saturation
Some of the following conditionscan causeCT saturation
external fault removal(passive) caused byCT saturation
e(passive) caused byCT saturation
the external fault , which always results in the maloperation(passive) caused byCT saturation
the DC - component of the fault(passive) caused byCT - saturation
generator differential protection from mal - operation caused by the transient currentresultedfrom CT saturation
relay misoperationresultingfrom CT saturation
the harmonicsresultingfrom CT saturation
increasing differential current that may enter the differential element operate regioncausesincreasing differential current that may enter the differential element operate region
to protection devices maloperationleadsto protection devices maloperation
to protective relay maloperationcould leadto protective relay maloperation
power system relays to malfunctionmay causepower system relays to malfunction
phase shifts and harmonics in the operating current source that are different from what may be generated in the polarizing voltage or current sourcecan causephase shifts and harmonics in the operating current source that are different from what may be generated in the polarizing voltage or current source
false directional interpretation created by phase shifts between the relative measurement points on the distorted current and undistorted voltage waveforms ( or possibly distorted voltage waveforms if Coupling Capacitor Voltage Transformers are usedmay causefalse directional interpretation created by phase shifts between the relative measurement points on the distorted current and undistorted voltage waveforms ( or possibly distorted voltage waveforms if Coupling Capacitor Voltage Transformers are used
the aperiodic components and distortions(passive) caused bythe aperiodic components and distortions
the neutral - side current and terminal - side current(passive) caused bythe neutral - side current and terminal - side current
the false differential currents(passive) caused bythe false differential currents
harmonic current waveforms(passive) caused byharmonic current waveforms
differential current error(passive) caused bydifferential current error
errors in reproduction of the current fundamental harmoniccauseserrors in reproduction of the current fundamental harmonic
no tripping of the circuit breaker and severe damage may takes placewill causeno tripping of the circuit breaker and severe damage may takes place
> transformer maximum 3phase through fault current/2Setting> transformer maximum 3phase through fault current/2
the performance of the principle proposed in this papermay influencethe performance of the principle proposed in this paper
an incorrect operationto causean incorrect operation
relay coordination(passive) caused byrelay coordination
The trip time delay(passive) caused byThe trip time delay
overcurrent relaysmay causeovercurrent relays
in a false differential current and nuisance trippingcan resultin a false differential current and nuisance tripping
the Synchronous Generator ( SG ) differential protectioninfluencesthe Synchronous Generator ( SG ) differential protection
the mal - operation or operating time delay of protection relaysmay causethe mal - operation or operating time delay of protection relays
various current relay misoperation , impact analysis of ancausesvarious current relay misoperation , impact analysis of an
scheme security(passive) caused byscheme security
desulphurization booster fan differential protection misoperation(passive) caused bydesulphurization booster fan differential protection misoperation
from direct current of fault currentresultingfrom direct current of fault current
problems for associated relays and provides pratical application guidelines regarding settings and scheme logiccausesproblems for associated relays and provides pratical application guidelines regarding settings and scheme logic
in accordance with all protective regions , which judges the internal and an external faults in all protective regionsis setin accordance with all protective regions , which judges the internal and an external faults in all protective regions