Name: Solid Sealed Pole Vacuum VCB Circuit Breaker 12KV For Transformer Substation
Brand: KNKONG
Price: 1 USD

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Solid Sealed Pole Vacuum VCB Circuit Breaker 12KV For Transformer Substation

Brand Name:KNKONG

Certification:CB,ISO,IEC

Model Number:VS1-12

Minimum Order Quantity:1

Delivery Time:15 working days

Payment Terms:L/C, T/T, Western Union

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Knkong Electric Co.,Ltd

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Location: Zhengzhou Henan China

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

Supplier`s last login times: within 11 hours

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Product Details

VCB solid-sealed pole vacuum circuit breaker 2000A 12KV for transformer substation using

Voltage: 12-24KV

Current: Max 2000A

Breaking current: 20KA

Type: withdrawable/Fixed

Product overview

VS1-series solid-sealed pole vacuum circuit breaker is suitable for 12kV, 24KV, three-phase alternating current frequency of 50, 60Hz indoor switchgear KYN28-12 (24) central and fixed switchgear operation together. The VS1 vacuum circuit breaker can be fixedly installed or combined with a trolley.

Special service condition

The special operating conditions are negotiated in advance by the manufacturer and the user (the manufacturer must consult the user in advance for each special operating condition) such as:

-Whether the site altitude exceeds 1000m (or need to order a prototype circuit breaker).

-Allows reducing the dielectric strength of the air.

-Corresponding insulation requirements.

-Situations where the ambient temperature rises.

-Whether the current carrying capacity is reduced.

-Is it necessary to provide additional ventilation for heat dissipation

Other precautions should be negotiated with the manufacturer according to section 2.2 of IEC 62271-1

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

Operation safety

VS1 vacuum circuit breaker has anti-misoperation lockout protection, realizes the "five guarantee" interlock function in the switch cabinet, avoids misoperation, and protects the personal safety of operators to the greatest extent.

Only when the VS1 vacuum circuit breaker and the grounding switch are in the off position at the same time, can the trolley roll from the "detection position" to the "service position".

The VS1 vacuum circuit breaker can only be closed in the "service/test" position.

When the VS1 vacuum circuit breaker is closed, the trolley cannot be moved in or out, only when the circuit breaker is in the off position.

The VS1 vacuum circuit breaker in the closed position cannot be shaken out from the "service position" to the "detection position".

The circuit breaker cannot be closed when pushed in.

When the circuit breaker is closed, if the closing signal is not released in time, the internal anti-trip control circuit will cut off the closing circuit to prevent multiple reclosing (optional).

Note: If the customer chooses electric closing and locking instead of manual closing and locking, the circuit breaker will not be closed when the secondary circuit cannot provide power or the power provided cannot meet the normal operation of the locking electromagnet (optional).