Indoor High Voltage Vacuum Circuit Breaker

24 kV vacuum circuit breaker Each poles embedded in expoxy resin Rated current from 630A to 4000A Withdrawable or fixed type

24kV vacuum circuit breaker 

CHFE 12kV series of indoor MV vacuum circuit breakers are used in the indoor switchgear rated 12 kV, 50(60)Hz. They are suitable for making different types of loads and frequent operation, to protect and control the electric equipments in industrial & mining enterprises, power plants and substations.  

 

The main electric conduction loop of the circuit breaker is casted with epoxy resin by APG technics, embedding its vacuum arc extinguish chamber and main loop as an integration. Thereby, its insulation performs with high strength, the size is small, and the surface of its vacuum arc extinguishing chamber avoids the influence of ambient environment, realizing the maintenance-free purpose.

 

Main features:  

·       small size, 

·       water-condensation proof,

·       high insulation,

·       pollution-proof,

·       low resistance,

·       free maintenance.  

  

Normal Service Condition 

·       Ambient temperature: -15 +40

·       Altitude: ≤1000m

·       Relative humidity: daily average relative humidity ≤ 95%; monthly average relative humidity ≤ 90%

·       Free from fire, explosion, heavy pollution, chemical corrosion and severe vibration.

·       Earthquake intensity ≤ 8 degree

If the service condition differs from the above , the user should consult it with manufacturer.

 

Specification

 

NO	Item					Unit	Technical Date
1	Rated voltage					kV	24
2	Rated insulating level		Rated short time power frequency withstand voltage(1min)				65
			Rated lighting inpulse withstand voltage (peak value)				125
3	Rated Frequency					Hz	50
4	Rated current					A	630	630	1250
							1250	1250	1600
									2000
									2500
5	Rated short circuit breaking current					kA	20	25	31.5
6	Rated short time withstand current						20	25	31.5
7	Rated peak withstand current						50	63	80
8	4S rated short-time withstand current						20	25	31.5
9	Rated shock steady current						50	63	80
10	Rated short-circuit closing current (peak value)						50	63	80
11	Duration of rated short-circuit current					S	4
12	Mechanical life					Times	20000(M2)
13	Rated making surge current of capacitor bank					kA	12.5(The frequency is less than 1000Hz)
14	Rated breaking current of single/symmetrical capacitor bank					A	630/400
15	Breaking times at rated short-circuit current					Times	274 times (E2)
16	Power frequency withstand voltage of secondary circuit					V	2000
17	Rated operating voltage						AC110/220		DC110/220
18	Rated operating order						O-0.3s-CO-180s-CO
19	Energy storage times					S	≤15
20	Contactor space					mm	13± 1
21	Contacting travel						4 ± 1
22	Pole distance						210 ± 1.5/275±1.5
23	Bounce time of Contactor during making					ms	≤2
24	Different time of breaking / making of 3 phases						≤2
25	Average breaking speed					m/s	1.1-1.7
26	Average making speed						0.6-1.1
27	Making time					ms	≤60
28	Brealing time						≤45
29	Rebound amplitude of contact breaking					mm	≤3
30	Permitted abrasion thickness of moving and fixed contacts						3
31	Conductance circuit resistance					μΩ	Handcart way		Rated current
							≤45		630-1250A
							≤35		1600-2000A
							≤25		more than 2500A

Indoor High Voltage Vacuum Circuit Breaker