When the secondary side of the electromagnetic current transformer is in normal operation, it is close to ( ) state.
A: Overvoltage
B: Open
C: Short circuit
D: Under voltage
A: Overvoltage
B: Open
C: Short circuit
D: Under voltage
举一反三
- The resistance value is infinite, the current passing through the resistance is always zero, and the voltage depends on the external circuit, then it is called as the short circuit state.
- An open circuit pn junction under illumination generates an open circuit voltage Voc.
- When there is a load, the main magnetic flux of the transformer is generated by ( ). A: Primary current I1 B: Secondary current I2 C: Primary current I1 andSecondary current I2 together D: Neither primary current I1 nor secondary currentI2
- Which of the following is not the role of high-voltage circuit breaker ? ( ) A: Switch on and off various load circuits under normal conditions B: Automatically and quickly switch off the fault current under fault conditions C: Realize the function of automatic reclosing D: Switching voltage level
- Please answer this question. A: Short circuit protection B: Overload protection. C: Under voltage protection. D: Thermal relays protection.