Pay attention to the daily use of Power Current Transformer
Nov 25, 2021| 1. Power Current Transformer polarity connection must be correct
The Power Current Transformer generally reduces the polarity mark. If the polarity is incorrectly connected, it will affect the measurement, and even when there are multiple current mutual inductances on the same line in parallel, all of them will cause a short circuit accident.
2. The secondary circuit of Power Current Transformer should have a protective grounding point
In order to prevent the high voltage from entering the low voltage side after the insulation breakdown between the primary and secondary windings and endangering the safety of people and instruments, the secondary side of the Power Current Transformer should be provided with a protective grounding point. Only one grounding point is allowed to be connected. Generally, it will be close to the Power Current. The box terminal of Transformer is grounded.
3. The secondary winding is not allowed to be open during operation
Otherwise it will lead to the following serious consequences: high voltage on the secondary side, endangering the safety of people and instruments; overheating, may burn out the windings; increase the measurement error.
4. Regarding relay protection devices
The secondary circuit of Power Current Transformer used for electric energy measurement should not be connected with relay protection devices and automatic devices to prevent mutual influence.