Operation and management of oil immersion transformers

Under normal conditions of the operation of the oil immersion transformer, the on-site operation and maintenance service worker is responsible. In the weekly time in the merged network operation, the operation and maintenance service staff should improve the safety protection safety inspection of the power transformer, It is found that all puzzles should be exchanged with the on-site construction project workers. Contact, ensure the reliability of the equipment. Stable operation.

1. Introduction to oil immersion transformers

The no-load trial operation, the substator should be coupled by the working voltage by the switching power supply circuit side, and the working voltage is impacted.

Substitutor airborne shock closing should be paid to the following:

Before the no-load impact is closed, the substrate should be static over 24 hours, and the elevated seat and rigid waterproof bushing of the installation of the gas supply should be released on time.

Before the air-load impact is closed, the overcurrent maintenance posture should be included in zero, and the gas relay signal circuit temporarily connects the suction circuit. 

Switching power supply circuit three-phase power source switch is different, the difference should be less than 10 ms, and the closing should have high-voltage arrester maintenance, and the transformer neutral point should be reliably grounded system (should be grounded immediately).

The no-load impact console operating voltage cannot exceed 5% of the gear position of the converter, the number of closing times is 5 times, the post-power time delay should not be less than 10 min, each closing interval should be not less than 5 min .

After the test is over, the gas relay signal should be connected to the alarm loop, and the contact point connector brake circuit should be absorbed, and the overcurrent maintenance limit is adjusted.

2. With load test:

After the no-load trial transport 24h, it can be transferred to the load operation, and the level should be gradually divided into 25%. 50% .75% to 100%.

After 24 hours with a certain load, the transformer main body and the components are all normal, and the transmetrator turns to everything that works.

Note: In the entire process of security inspection, the on-site operation and maintenance service worker uses a temperature tester or thermal imaging device to make targeted inspections of spare parts such as transformer itself and terminal blocks; inverter operation It is a uniform electricity flow sound, if the sound is found to discover an abnormality, expanded significantly. Or the existence of the sound, it should be found immediately. Use a certain reasonable countermeasure, it is necessary to reduce the load or suspend business shifter.