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12KV Solid Sealed Pole VCB Circuit Breaker 25KA Explosion Proof

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12KV Solid Sealed Pole VCB Circuit Breaker 25KA Explosion Proof

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Brand Name :	KNKONG
Model Number :	VS1-12
Certification :	CB,ISO,IEC
Payment Terms :	L/C, T/T, Western Union
Supply Ability :	1000 Unit per month
Delivery Time :	15 working days

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Product Details
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12KV Solid Sealed Pole VCB Circuit Breaker 25KA Explosion Proof

Solid sealed pole vacuum circuit breaker 12KV for indoor electric panel

Voltage: 12-24KV

Current: Max 2000A

Breaking current: 20KA

Type: withdrawable/Fixed

Product overview

Vacuum circuit breaker: It is a new type of high-voltage circuit breaker developed in the 1960s (for example, the picture at the beginning of this article is ZN28-12 indoor high-voltage vacuum circuit breaker), which uses vacuum to extinguish arcs. Its advantages are small size, light weight, fast action, fireproof and explosion-proof, low noise and so on. At present, there is a trend to replace other circuit breakers, mainly used in substations below 35KV and places requiring frequent operations in industrial and mining enterprises.

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

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