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unbalanced loadscausingnegative or zero sequence currents to flow
faultscausea modified fault negative sequence current
by phase voltage unbalance and phase(passive) caused bynegative sequence currents ... to phase faults
by each user(passive) caused bynegative sequence voltage imbalance
A non - balanced voltage conditioncausesnegative sequence currents within the stator
unbalanced loadswill causenegative - sequence current and negative - sequence voltage
the disturbancecausingexcessive negative sequence current
Three - phase unbalanced operationcauseszero phase sequence current
phase imbalanceleadingto high negative sequence currents
However , a transformer that is subjected to this will act as an unbalanced load to the generatorcausingnegative sequence current in the stator
acting as an unbalanced load to a generatorcausingnegative sequence current in the stator
unbalanced loadscausingnegative or zero sequence currents
by phase loss or reverse phase(passive) caused bynegative - phase current
by dead - time effect(passive) caused bythe zero - sequence current
the behavior of the motor load influences on the positive sequence parameters next to the voltageinfluencesthe negative sequence voltage
by non - fault factors(passive) caused bythe negative sequence current
in the case of negative sequenceinfluencesthe negative sequence voltage
the negative voltageresultedfrom the negative - sequence current
external ground faultscausezero sequence current to
by Y - side(passive) caused byzero sequence current
by the load(passive) caused bythe negative sequence current
voltage imbalance(passive) caused byThe negative - sequence voltage
by the phase(passive) caused bythe negative sequence voltage
by unbalanced load(passive) caused byzero sequence current
by load imbalance(passive) caused bythe negative sequence current
by unbalanced load(passive) caused bythe negative sequence current
by reverse fundamental magnetic field(passive) caused bynegative sequence current
by the load imbalance(passive) caused bythe negative sequence voltage
it become " cathode " tooresultsnegative grid current
by a phase unbalance(passive) caused bythe negative sequence voltage
by the unbalanced grid(passive) caused bynegative sequence current
by the lopsided load(passive) caused bythe negative sequence current
by the asymmetrical faults(passive) caused bythe negative sequence current
Phase Bleadsnegative phase sequence
Electron - hole pair generation within the depletion regionalso contributesnegative diode current
the regulator ... in turncausesnegative inductor current
in turncausesnegative inductor current
by the neutral voltage shift problems discussed in [ 3(passive) caused byzero sequence currents
by a current imbalance(passive) caused byNegative sequence currents
by a fault(passive) caused bypositive sequence currents
faults in the motorcan causefaults in the motor
heating of the motorto causeheating of the motor
current asymmetrymay causecurrent asymmetry
to the error of the three - phase voltage phaseleadsto the error of the three - phase voltage phase
higher heating effect than one unit of positive - sequence currentcauseshigher heating effect than one unit of positive - sequence current
for 7V ) protectionsettingfor 7V ) protection
to the rotor heatingcontributesto the rotor heating
in heating of the statorwill resultin heating of the stator
to reduction in motor output torqueleadsto reduction in motor output torque
overheating(passive) caused byoverheating
the stator(passive) caused bythe stator
oscillations(passive) caused byoscillations
in decreased percentage of productive current and poor motor efficiencyresultingin decreased percentage of productive current and poor motor efficiency
a double frequency current induced in the rotorcausesa double frequency current induced in the rotor
the DC current(passive) caused bythe DC current
in unbalanced load currentresultsin unbalanced load current
rotor damagecould causerotor damage
to double oscillationsleadto double oscillations
power oscillationscausespower oscillations
poor power quality of powercausespoor power quality of power
heatingcan causeheating
additional generator torque oscillationscausesadditional generator torque oscillations
to cascading tripping of a number of generators as wellmay leadto cascading tripping of a number of generators as well
heating in generatorscan causeheating in generators
additional losses and heating in motorscauseadditional losses and heating in motors
heavy generator torque oscillations that reduce the lifetime of the drive traincausesheavy generator torque oscillations that reduce the lifetime of the drive train
problems in the input / output systems , such as no signalscan causeproblems in the input / output systems , such as no signals
a tripcauseda trip
heating of motor and consequently motor failurecausesheating of motor and consequently motor failure
excessive heating of the motor rotorcan causeexcessive heating of the motor rotor
in unbalanced rotation of the magnetic fieldresultsin unbalanced rotation of the magnetic field
such , mechanical motor vibrations(passive) caused bysuch , mechanical motor vibrations
to nuisance tripping by protectionscould leadto nuisance tripping by protections
excessive heating of electrical machines , saturation of transformerswill causeexcessive heating of electrical machines , saturation of transformers
counter rotating torque in the rotor which acts against the normal torquecausecounter rotating torque in the rotor which acts against the normal torque
unbalanced voltages that trigger unstable currents in other loadscan directly causeunbalanced voltages that trigger unstable currents in other loads
The resultant air gap field(passive) caused byThe resultant air gap field
the mal - operation of earthcan causethe mal - operation of earth
the mal - operation of earth fault protectioncan causethe mal - operation of earth fault protection
deflection in one direction ... and a positive current deflection in the otherwill causedeflection in one direction ... and a positive current deflection in the other