Product overview

YB27-12/0.4 pre-installed substation is a domestic American box change. As an important power supply unit in the cable-based distribution network, the product is a complete set of pre-installed products integrating high-voltage control, protection, substation and distribution equipment, and is widely used in urban and rural distribution networks. The product will be high-voltage load switch, high-voltage fuse placed in the transformer oil, with the transformer body box or sub-box two structural forms. The oil tank adopts a fully sealed structure and is equipped with oil temperature gauge, oil level gauge, pressure gauge, pressure relief valve, oil drain valve and other components to monitor the operation of the transformer.

In order to make this product more suitable for the actual requirements of China's power grid, the company has introduced a plug-type dry fuse, the fuse does not affect the performance of the transformer oil. According to the complexity of low-voltage feed-out requirements, YBM-12/0.4 products are divided into standard, reinforced and integrated three shell forms, so that users and design units in the selection, to achieve more flexible, more economical.

Main technical parameters

Product rated parameters

Rated voltage: 10KV/0.4KV high voltage switch thermal stability capacity: 20KA/26

Rated short-circuit breaking capacity of low-voltage main circuit switch: 35KA Rated voltage of high-voltage side: 10KV

High voltage side maximum voltage: 12KV low voltage distribution circuit switch rated short circuit breaking capacity: 35KA

Low voltage side rated voltage: 0.4KV high voltage load switch transfer current:>1500A

Rated frequency: 50Hz Noise level:<50dB Insulation level: (Table below)

Note: a. According to customer requirements, the high voltage tap range of the transformer can be designed to be 2 × 2.5%.

B, according to customer requirements, the low voltage of the transformer can be designed to 0.69kV.