Overview

The YD4 (can replace VD4-1 2) indoor high-voltage vacuum circuit breaker produced by Daya Group Co., Ltd. is exclusively produced nationwide and is widely used in indoor armored air-insulated switchgear. It complies with the regulations of GBl984-2003, DL/T403-2000, German DINVDE0670-~IEC62271-100:2001 and IEC60694. Under normal use conditions, as long as it is within the technical parameters of the circuit breaker, it can ensure safe and reliable operation in the power grid of the corresponding voltage level. YD4 can replace the three-phase poles of the VD4-12 indoor high-voltage vacuum circuit breaker. Part of it is composed of an automatic pressure gel process (APG), which directly seals the equal vacuum arc extinguishing chamber and the upper and lower outlet terminals in epoxy resin. The arc extinguishing chamber is made by Siemens of Germany or made in China, which reduces the adjustment steps of the circuit breaker and The external environment contaminates the arc extinguishing chamber shell and improves reliability. In conditions of frequent operation or long breaking life, YD4 vacuum circuit breaker has special advantages. This vacuum circuit breaker has a reclosing function, extremely high operational reliability and service life, and the pole part is maintenance-free.

·Use environment

A Ambient air temperature: upper limit +40℃, lower limit -15℃;

b Altitude: ≤100m (if the altitude needs to be increased, the rated insulation level will be increased accordingly);

c Amplitude: earthquake sequence does not exceed 8 degrees;

d The daily average relative humidity of the air is not greater than 95%, and the monthly average is not greater than 90%

e. Places without risk of fire, explosion, serious pollution, chemical corrosion and severe vibration.