For a neutral-unearthing system, during a bolted single line-to-ground fault, the non-fault phase voltage and the fault phase voltage are ()respectively.
A: phase voltage and zero
B: phase voltage and line-to-line voltage
C: line-to-line voltage and phase voltage
D: line-to-line voltage and zero
A: phase voltage and zero
B: phase voltage and line-to-line voltage
C: line-to-line voltage and phase voltage
D: line-to-line voltage and zero
举一反三
- The voltage meter and current meter on the main switchboard shows ( <br/>). A: phase voltage and phase current of generator B: line voltage and line current of generator C: line voltage and line current of crane D: line voltage and line current of shore power
- At a ( ) fault of the<br/>system, the non-fault phase voltage will increase with the<br/>zero-sequence impedance. A: three-phase fault B: double line-to-ground fault C: line-to-line fault D: single line-to-ground fault
- 100%<br/>Protection for generator stator single phase earth fault() A: zero<br/>sequence voltage protection B: third<br/>harmonic voltage protection C: zreo<br/>sequence current
- The inductor voltage phase lags its current by 90 o, and the capacitor current lags its voltage by 90 o, is this conclusion true? [ ]. A: It's impossible. B: When the capacitance and inductance are nonlinear components. C: When inductance current and voltage, capacitance current and voltage are not related direction. D: Whenever.
- For the of the phase compound excitation type AVR of a self-excited<br/>synchronous generator, the AC side of the rectifier is connected with<br/>capacitors delta connected. The function of these capacitor are ( <br/>). A: resistance-capacitance protection of rectifier B: compensate the generator terminal voltage change caused by the change<br/>of load current C: compensate the generator terminal voltage change due to load current<br/>phase change D: accelerated voltage built-up process