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Withdrawable Solid Sealed Pole VCB Circuit Breaker 20KA Breaking

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Knkong Electric Co.,Ltd

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Withdrawable Solid Sealed Pole VCB Circuit Breaker 20KA Breaking

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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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Withdrawable Solid Sealed Pole VCB Circuit Breaker 20KA Breaking

20KA Breaking alternating withdrawable solid-sealed pole VCB 12KV VS1 series

Voltage: 12-24 KV

Current: 630-1250A-2000A

Breaking current: max 20KA

Type: withdrawable

Product overview

Secondary circuit

The secondary control circuit board of Knkong-electric's VS1 series vacuum circuit breaker uses a modular design. The electrical connection of the machine uses high-grade self-buckle plugs, which are convenient for replacement and ensures reliable operation of the electrical connection.

High-performance oil buffer

The high-performance breaking buffer can significantly reduce the amplitude of overshoot and spring back generated by the moving contact of the VS1 vacuum circuit breaker during breaking, and avoid the overshoot of the moving contact leading to partial fatigue of the vacuum interrupter bellows Loss of mechanical durability. With the decrease of the rebound amplitude of the moving contact, the reignition phenomenon has not been found in the test of the switched capacitor bank.

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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