indoor high voltage vacuum circuit breaker

• Model NO.: VHE-40.5

Product Description

 indoor high voltage vacuum circuit breaker

VHE-40.5 vacuum circuit breaker with 40.5KV rated voltage, indoor distribution device of three-phase ac 50HZ, Is a new product that developed by our company independently.  We have the intellectual property rights,The product can be compatible with the ZN85.VN1.VBD and so on.

VHE-40.5 indoor vacuum circuit breaker (hereinafter referred to as the circuit breaker) ,Is a type of high voltage switch equipment which appropriate to 40.5kv,50Hz three phase alternating current system.  For points and load current, overload current, fault current of industrial and mining enterprises,Power plant and substation.  Circuit breaker and operating mechanism arranged up and down structure,Effectively reduced the depth of the circuit breaker.  Three-phase arcing chamber and the associated charged body are isolated by three independent epoxy insulating tube,Constituting a compound insulation construction.  Circuit breaker can meet the normal operation requirements of the air distance and the creep age distance,and effectively reduce the volume of circuit breaker.  Main electric circuit of vacuum arcing chamber with dynamic and static conductive connection are installed in the insulation cylinder,Phase spacing is only 300mm.  The primary loop electrical connections with high reliability all adopt the fixed connection. Insulating cylinder is mounted on the top of circuit breaker frame.  The spring operating mechanism which is specially designed for this new type of circuit breaker is mounted on the circuit breaker, Its structure is much more suitable for up and down layout form of circuit breaker,And become the integral part of the whole structure.  Mechanism design is terse,The output curve and the performance is much more suitable for the characteristics and requirement of 40.5 kV vacuum circuit breaker.  Overall layout is reasonable, beautiful,Terse, compact design,Flexible operation, Electric reliable performance, long service life, Convenient maintenance and maintenance-free features.The circuit breaker is suitable for frequent operation,Various occasions and quite harsh operating conditions.
 
The normal conditions
 

1. Ambient temperature: max +40°C ,min -15ºC(storage and transportation under -30ºC is allowed);
2. Altitude: ≤1000m;
3. Relative humidity: Daily average relative humidity≤95%; Monthly average relative humidity≤90%; Daily average saturated vapor pressure:≤2.2*10^-3 MPa,Monthly average value ≤1.8*10^-3 MPa;
4. Earthquake intensity:≤8 degree;
5. The installation should be free from fire,Explosion, Severe vibration,Chemical corrosion and serious pollution.

Main Technical Data
 

No.	Item		Unit	Value
1	Rated voltage		KV	40.5
2	Rated insulation level	Rated lighting impulse withstand voltage (peak)	KV	185
		1min Short-time power frequency withstand voltage(1min)	KV	95
3	Rated short-circuit breaking current		KA	25	31.5
4	Rated current		A	1250/1600	1250/1600/2000
5	Rated withstand current(peak)		KA	63	80
6	Rated operations of short circuit breaking current interruption			20
7	Rated short-circuit duration		S	4
8	Rated operating sequence			-0.3S--180S- Opening-0.3S-closing opening-180S-closing opening
9	Rated power voltage of closing and opening operating loop		V	AC,DC220    AC,DC110
10	Closing time		ms	50~100
11	Opening time		ms	30~60
12	Rated breaking current( a capacitor)		A	630
13	Rated breaking current(back to back capacitor)		A	400
14	Mechanical life			20000

Mechanical characteristics of circuit breaker assembly after adjustment
 

No.	Item	Unit	Value
1	Contact distance	mm	22±2
2	Contact over travel	mm	8±2
3	Average opening speed	m/s	1.8±0.2
4	Average closing speed	m/s	0.65±0.2
5	Contact bouncing duration at closing operation	ms	≤3
6	Operating mechanism type		3AV Special spring mechanism
7	Three-pole closing operation un-simultaneity	ms	≤2
8	Conductive circuit resistance of each phases	μΩ	<45

 Dimensions