China Wholesale Cable Branch Boxes Suppliers – YBM intelligent integrated substation – Jonchn

Model and meaning

High voltage main circuit common scheme

1. Ambient temperature: maximum +40℃，minimum-30℃;
2. Altitude:≤3000m
3. Wind speed: About34m/s (≤700Pa);
4. Humidity: Average daily relative humidity≤95%
Average monthly relative humidity≤90%
5. Shake-proof: Level acceleration≤0. 4m/s2 ;vertical acceleration≤0.15m/s2 ;
6. Gradient of installation position:≤ 3°.
7. Installing environment: ambient air has not been obviously polluted by corrosive or flammable gas,and there is no strong feeling of shock.
8. Please negotiate with the company when the purchased product is beyond above stipulated conditions.

Product rated parameters

Insulation level

Structural features

The framework structure of the box enclosure is made of channel steel and angle steel with higher mechanical strength. the enclosure is made of aluminum alloy plate with smooth surface, beautiful outline and better anti corrosion performance, the base of the box body is 300-600mm higher than the ground.All the doors of the box enclosure are open to outside,and the opening angle is larger than 90° and is set with location device, handles, secret door, as well as built-in locks which have the functions of rain protection, anti-blockage and rust protection. the box bodies are of the full-sealed theft-proof structure. to assure the operation under the normal ambient air temperature, the temperature of all the electrical equipment can’ t exceed the maximum allowable temperature, and the box body has enough natural ventilation openings and heat insulation measures. the box body of the prefabricated substation is designed with special grounding conductor, on which there are more than 2 fixed connecting terminals connected to the grounding network and on which there are obvious grounding marks. the grounding terminal is the copper bolt, the diameter of which is not less than 12mm. the grounding conductor is made from copper strip, the current density of which is not higher than 200A/㎜² and the cross section of which is not less than 30㎜², and it is guaranteed that there is no overheat and there is no bad effect to the safety of the surrounding objects when the maximum short circuit current passes. the dynamic and thermal stability current that the special grounding conductor endures must be combined with the grounding mode of high voltage power distribution device.

Transformer performance parameters

For 10kV prefabricated substation performance level of S9, S10, S11 series oil-immersed transformer

a. The high-voltage tapping range can be designed to ±2×2.5% according to customer ‘s requirement.
b. The low voltage of transformer can be designed to 0.69kV according to customer ‘s requirement.

Transformer performance parameters

Performance parameter of load switch

Schematic diagram of main circuit

a. The rated values of plug- in type fuse and backup current limiting fuse are subject to transformer’s capacity by manufacturer.
b.High-voltage charged indicator or fault indicator can be extra installed for incoming line.
c.High-voltage metering device can be extra installed according to requirement.