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European change

Product features

■ the structure of photovoltaic special box transformer is in the shape of "mesh" or "product"

■ the high-voltage ring network switchgear is installed in the high-voltage room, which can be switched by air pressure, vacuum, SF6 or vacuum load according to the needs of users, and has the "five prevention" function. When the current limiting high-voltage fuse is used, when a phase fuse is fused The automatic opening of load switch avoids the fault drop caused by phase failure operation.

■ the low-voltage room has the overall function of low-voltage switchgear, which can be selected by users and combined arbitrarily.

■ the transformer adopts oil immersed transformer or dry-type transformer. The oil immersed transformer can be fully sealed with oil conservator or without oil conservator;

■ the transformer room adopts natural ventilation and automatically controlled forced cooling air cooling device It has an exhaust system that is automatically controlled with temperature changes It can effectively control and reduce the temperature in the box Meet the operation requirements According to the requirements of users, anti condensation devices can also be used, which can be easily accessed from both sides of the transformer room and the gate along the track. The box material can prevent rainwater and dirt from entering It has the conditions for long-term outdoor use to ensure anti-corrosion and waterproof Dust proof performance Long service life Simple maintenance and beautiful appearance.

■ the box has good heat insulation, rain proof, radiation proof and ventilation effects;

■ special PV box transformer is equipped with communication cabinet, which can upload all internal parameters and status;

■ a DC screen or UPS is installed inside the special box transformer for photovoltaic, which is used for the power supply of the internal secondary circuit, avoiding the disadvantage that the opening and closing cannot be carried out due to power failure;

Hua Bian

Product features

Compact structure and small volume, only about 1/3--1/5 of the products produced with the same capacity, greatly reducing the floor area;

■ fully sealed, fully insulated structure, no insulation distance, reliable protection of personal safety;

■ high voltage is protected by load switch fuse combination;

■ high voltage wiring can be used for both ring network and terminal, with flexible power supply mode and high reliability;

■ excellent transformer performance: low loss, low noise, low temperature rise; Strong overload capacity, short circuit resistance and impact resistance;

■ meet various low-voltage feed out requirements, which can be selected according to the scheme or designed by ourselves;

■ there are two kinds of cable heads: 200A elbow cable connector and 600at connector. Elbow cable connector is suitable for cable cross-sectional area of 35-185mm2

The T-joint is suitable for the cable with a cross-sectional area of 35-500mm2. The material of the cable head is divided into copper core and aluminum core, both of which can be configured with full insulation

Zinc oxide arrester. The 200A elbow cable head can be plugged in and out with load, and can also play the role of isolation switch.

■ structural characteristics of sub box

■ the box transformer adopts the box structure:

The transformer body and high-voltage components such as high-voltage load switch, plug-in fuse and backup current limiting fuse are respectively placed in the sealed oil tank. The two boxes are horizontally arranged on the left and right, and are completely separated by partitions. There are insulating through wall bushings on the partitions for the wiring of transformer and load switch, which can be easily removed and replaced without affecting the use of another box.

■ advantages of two boxes arranged around:

1. The two boxes do not affect each other:

-It prevents the upper oil from flowing into the bottom oil tank due to the leakage of the diaphragm, resulting in the lack of oil in the upper oil tank (lack of oil or no oil leads to the arcing of the operating load switch, which is dangerous to equipment and personnel};

-Another advantage is that the left and right layout is convenient for maintenance. When the transformer room and load switch room are overhauled, the two boxes do not affect each other, which is convenient and fast (the upper oil tank of the transformer arranged above and below can be opened only after the upper oil tank is completely removed, which is extremely inconvenient for maintenance).