Detailed Product Description

1.       Introduction

      YD4 indoor vacuum high voltage circuit breaker is used in the indoor switch equipment of 12kV power system as power design protection and controlling unit of power equipment, industrial and mining establishments. Because of the unique advantage of this breaker, it especially applies to the situation of frequent operation with rated working current or the situation of opening short-circuit current repeatedly.

This breaker adopts the one-piece structure combined spring mechanism with the breaker body, which can be both as fixed installation unit and as handcart unit for using combined with special promote mechanism.

2.     The Standard of Product

This breaker meets the standard requirements of GB1984-2003 HV AC circuit breaker, JB 3855-1996 3.6-40.5kV indoor AC HV vacuum circuit breaker, DL/T 403-2000 12-40.5kV technical order condition of HV vacuum circuit breaker and the relative requirements of IEC62271-110:2001.

3.     Using Surrounding Conditions

a) Ambient temperature

   Maximum temperature:    +40

   Minimum temperature:     -15

b) Ambient humidity

   Daily average relative humidity:      95%

   Monthly average relative humidity:    90%

   Daily average vapor tension:          2.2

   Monthly average vapor tension:        1.8

c) Altitude:    1000m

d) Earthquake intensity:    level8 

e)  Ambient air do not obviously polluted by dust, smoke, corrosive  or  flammable gas, vapor or salt frog.