Home Companies Knkong Electric Co.,Ltd

Fixed Type Vacuum VCB Circuit Breaker With Environmental Protection

Active Member

Contact Us

[China]

Address: No. 25 Street , Hanghai Road, Zhengzhou,Henan,China

Contact name:Ken Chan (English)

Knkong Electric Co.,Ltd

Fixed Type Vacuum VCB Circuit Breaker With Environmental Protection

Country/Region	china
City & Province	zhengzhou henan
Categories	Battery Chargers

Product Details

Fixed type 205mm phase spacing vacuum circuit breaker with environmental protection

Voltage: 12KV-24KV

Current: 630A-2000A

Breaking current: 20KA-25KA

Type: Fixed

Product overview

"High-voltage vacuum circuit breaker" is named because its arc extinguishing medium and the insulating medium in the contact gap after arc extinguishing are both vacuum; vacuum circuit breakers are small in size, light in weight, suitable for frequent operation, and arc extinguishing without maintenance. Advantages, it is more popular in the distribution network.

Vacuum circuit breakers can usually be divided into multiple voltage levels. The low-voltage type is generally used for explosion-proof electrical applications. Like coal mines and so on.

Technical Parameters

No.	Item		Unit	Parameter
1	Rated voltage		KV	12
2	Rated frequency		Hz	50/60
3	Rated insulation level	1min power frequency withstand voltage(r. m. s)	KV	42(phase-to-phase, phase-to-earth) 48(across the isolating distance)
		Lighting impulse withstand voltage (peak)		75(phase-to-phase, phase-to-earth) 85(across the isolating distance)
4	Rated current		A	630	630		1250		1600
				1250	1250		1600		2000
							2000		2500
							2500		3150
									4000
5	Rated short-circuit breaking current		KA	20	25		31.5		40
6	Rated short-time withstand current			20	25		31.5		40
7	Rated short-circuit marking current			50	63		80		100
8	Rated peak withstand current			50	63		80		100
9	Rated duration of short-circuit		s	4
10	Rated operating sequence			O-0.3s-O/C-180s-O/C
11	Breaking times of rated short-circuit current		Times	30/20 times(40KA)
12	Mechanical endurance		Ops	20000
13	Rated single capacitor bank breaking current		A	630
14	Rated back-to-back capacitor bank breaking current			400
15	Double-earth fault breaking current			27.4
16	Allowable maximum contact erosion		mm	3
17	Clearance between open contacts			10±1
18	Over stroke			3.5±0.5
19	Non-simultaneity of 3-phase opening and closing		ms	≤2
20	Bounce duration of contact closing			≤2
21	Average breaking speed (instant breaking 6mm)		m/s	1.1±0.2
22	Average making speed			0.8±0.2
23	Making time		ms	≤100
24	Breaking time			≤50
25	Resistance of each phase main circuit		μ Ω	630A			≤50
				1250A			≤45
				1600A~2000A			≤35
				≥2500A			≤25
26	Contact breaking bounce amplitude		mm	≤2
27	Rated operating voltage	Rated operating voltage(V)AC/DC	V	24*		110		220
		Scope of normal operation voltage		Opening:65%-120% rated voltage, in case the voltage is lower than 30% rated voltage, opening operation is not allowed
28	Rated voltage of energy storage motor		V	AC110/220,DC110/220
29	Energy storage time		S	≤15