Question

三.判断题(共18题,共36分)
41.in the use of electromagnetic current transformers, the secondary side must not be open circuited, and the voltage transformer should not be short - circuited during use. (2分)
○正确
○错误

Explanation:

Current transformers (CTs) have a low - impedance secondary. If the secondary of a CT is open - circuited, a very high voltage can be induced in the secondary due to the large magnetizing force, which can be dangerous. Voltage transformers (VTs) have a high - impedance primary. If a VT is short - circuited, a large current will flow in the primary (since \(I=\frac{V}{Z}\), and \(Z\) is very small for a short - circuit), which can damage the transformer.

Answer:

Correct