Common faults and solutions for split type current transformers

The opening and closing of the split current transformer often encounters various problems in practical applications. The following summarizes several common faults and treatment methods in transformer applications:

1. Insulation caused by thermal breakdown.

Jewelry can accept high-voltage split current transformers with better stability, but in individual cases, when the current is large, but due to the high voltage, a higher insulation medium temperature will be generated. Once the acceptable temperature is exceeded, they can raise high-temperature insulation materials. Failure, resulting in split current transformer failure.

2. Problems caused by partial discharge.

The main capacitor of the 220kV normally open jewelry split current transformer is evenly distributed, but if the process does not meet the specifications, due to the stability of the process, the capacitor plate will not meet the requirements, which will cause the surrounding insulation to loosen. If it is not grasped well, it will cause uneven capacitor screen dislocation, U-shaped clips, because the credit card is too tight, the insulation will be deformed, the integrated bubbles and it is easy to change the voltage distribution, which will make the field strength of the other capacitor screen higher than the other, resulting in partial discharge, if not tested and handled in time, capacitor core rod failure will occur.

3. Humid environment.

Due to its poor quality, the gem of the internal open-close current transformer can produce intense discharge. The liquid produced in a humid environment will accumulate at the bottom of the capacitor core rod, so the curved part of the capacitor core rod becomes a heat-insulating material. The effect is very poor. Because they are in working condition for a long time, it is easy to form a capacitor core rod synthesis, which makes it produce power problems.

4. Reasons for insufficient drying and degassing.

CT needs to stop the vacuum oil filling project, otherwise the gas cannot be discharged and the vacuum state cannot be formed. In addition, the short degassing time leads to unclean degassing. Under the dual action of voltage and temperature, the current sensing device will heat up from time to time, causing mobile phone aging and failure, causing problems.

5. Personnel use errors.

The open-close current transformer is a relatively common fault, which is more likely to be caused by personnel, mainly due to personnel use errors, which together lead to loosening due to poor quality, secondary winding open circuit and other reasons during the vacuum oil stop process. , These uses will only cause partial overheating or discharge of the local power system. The emergence of these conditions will cause abnormal results of oil-soluble gas chromatography analysis.