Power transformer cooling device requirements

2019-05-30 10:35:36 JUKE CHINA ODM OEM Transformer factory Read

Power transformer cooling device requirements

 Power Transformers can raise and lower voltages to meet the various needs of users, and become some important equipment for power plants and substations. For its cooling devices, some requirements must be met. Let's take a look.
1. Install all cooling devices according to the manufacturer's specifications;
Second, the cooling system of the strong oil circulation needs to have two independent working power sources and can automatically switch. When the working power supply fails, the standby power supply should be automatically put in and the sound and light signals should be sent;
Third, the strong oil circulation transformer, when the applause cooler is cut off should emit sound and light signals, and automatically (water-cooled can be manually) into the standby cooler.
4. The auxiliary motor of the fan, water pump and oil pump shall have overload, short circuit and phase failure protection; there shall be means for monitoring the direction of rotation of the oil pump motor;
5. The oil pump of the water cooler should be installed on the oil inlet side of the cooler, and ensure that the oil pressure in the cooler is greater than the water pressure of about 0.05Mpa under any circumstances (except as otherwise specified by the manufacturer). There should be a drain cock on the outlet side of the cooler;
6. Power transformers with strong oil circulating water cooling, and the check valve of the submersible pump of each cooler shall be equipped with a check valve;
7. Power transformers with strong oil circulation cooling shall be capable of controlling the switching of the cooler according to temperature and/or load.
The power transformer shall be equipped with a temperature measuring device as follows:
1. There should be a thermometer for measuring the top oil temperature (the transformer on the column can be downloaded)
2, oil-immersed transformers of 1000kVA and above, oil-immersed transformers of 800kVA and above and dry-type transformers of 630kVA and above, the signal thermometer should be connected to the remote signal;
3. Transformers with strong oil circulating water cooling should be equipped with temperature measuring devices at the inlet and outlet of the cooler;
4. When measuring temperature, the temperature calculation tube holder should be filled with transformer oil.
In accordance with the above requirements, try to ensure that the power transformer is in a good environment, achieve a good working condition, and strive to achieve higher work efficiency.

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