Fuse Potential Transformer Series

The fuse potential transformer shall be tested and inspected in accordance with the items specified in the regulations before being put into operation, like measuring polarities, connecting groups, shaking insulations, checking phase sequence, etc...

The wiring of the fuse potential transformer should be correct. The primary winding should be connected in parallel with the circuit under test, and the secondary winding should be connected in parallel with the voltage coil of the connected measuring instrument, relay protection device, or automatic device. At the same time, pay attention to the correctness of the polarity.

The capacity of the load connected to the secondary side of the potential transformer should be appropriate, and the load connected to the secondary side of the potential transformer should not exceed its rated capacity. Otherwise, the error of the transformer will increase and it is difficult to achieve the accuracy of the measurement.

Short circuit is not allowed on the secondary side of the potential transformer. Since the internal impedance of the potential transformer is very small, if the secondary circuit is short-circuited, a large current will appear, which will damage the secondary equipment and even endanger personal safety.

In order to ensure the safety of people when touching measuring instruments and relays, the secondary winding of the potential transformer must be grounded. Because after grounding, when the insulation between the primary and secondary windings is damaged, it can prevent the instrument and relay from appearing high voltage and endangering personal safety.

No short circuit is allowed on the secondary side of the potential transformer.