How to operate and maintain a liquid-cooled transformer?

The liquid-cooled transformer is a device that converts AC voltage, current, and impedance. When there is an AC in the primary coil, an AC magnetic flux is generated in the iron core (or magnetic core), so that a voltage (or current) is induced in the secondary coil. So how to operate and maintain the liquid-cooled transformer? Let's take a look together next.

This is the content list:

l Overload operation of liquid-cooled transformer

l Abnormal sound of the liquid-cooled transformer

l Whether the liquid-cooled transformer insulation sleeve is damaged, cracked, or discharge traces

l Regular cleaning of liquid-cooled transformer

Overload operation of liquid-cooled transformer

Overload operation the means that the load current exceeds the rated current of the liquid-cooled transformer. Under normal circumstances, when the liquid-cooled transformer is running at a small load, its insulating material cannot fully function. In the continuous overload operation, the liquid-cooled transformer will generate high temperatures, which will cause the winding insulation to be hardened and fall off, forming a liquid-short circuit between turns of the cooled transformer. At the same time, the transformer oil produces sludge, which accumulates on the tank plate, windings, and iron core, resulting in poor heat dissipation of the transformer oil. This vicious circle not only severely affects the life of the liquid-cooled transformer, but also causes accidents such as high voltage breakdown and liquid-cooled transformer burning. Therefore, always observe the three-phase load current. The load current of the liquid-cooled transformer should be consistent, and if there is a deviation, it should not exceed 10%.

Abnormal sound of the liquid-cooled transformer

When an alternating current passes through the windings of the liquid-cooled transformer, a normal and uniform "buzzing" sound will be produced due to the core's self-vibration. If the liquid-cooled transformer has an abnormal sound, you need to find the reason and report it to the relevant department for handling in time. The sound of the liquid-cooled transformer is different when there is no load and when it is loaded. According to the abnormal sound characteristics of the liquid-cooled transformer compared with the past, it can be put into operation after the cause is found.

Whether the liquid-cooled transformer insulation sleeve is damaged, cracked, or discharge traces

The liquid-cooled transformer insulation sleeve has not been cleaned for a long time, or there are broken cracks and discharge traces. In rainy or foggy weather, the leakage current of the liquid-cooled transformer insulation sleeve will increase due to humid air and the insulation will decrease. Flashover to the ground. In addition, serious fouling of the liquid-cooled transformer insulation sleeve, and large fragments and cracks on the insulation sleeve can also cause flashover or explosion accidents. To solve this phenomenon, in addition to observing the insulating sleeve itself, it is also necessary to pay attention to the dirt accumulation rules of the liquid-cooled transformer sleeve, such as wind direction and surrounding environment, so that the cleaning can be done.

Regular cleaning of liquid-cooled transformer

Clean the dirt on the liquid-cooled transformer regularly, check the liquid-cooled transformer casing for flashover discharge, whether the liquid-cooled transformer is well-grounded, and whether there is any disconnection, desoldering, or breakage. The liquid-cooled transformer should be measured regularly. Transformer grounding resistance, its resistance value is not greater than 4 Ω or 10 Ω, or take anti-pollution measures, install casing anti-pollution cap. When connecting and disassembling the lead wire of the liquid-cooled transformer, strictly follow the process to avoid internal breakage of the lead wire.

Zhejiang Shuntong Electric Co., Ltd. is a professional manufacturing enterprise integrating development, production, sales, and service. The above is about how to operate and maintain the liquid-cooled transformer-related content. If you are interested in a liquid-cooled transformer, please contact us, we will provide you with good equipment. Our website is www.sntoom.com, we are looking forward to your visit and hope to cooperate with you.