VS1(ZN63A)-12 Indoor Vacuum Circuit Breaker | Reliable 12kV Power Protection | Chennuo Electric-Chennuo Electric Technology Group Co., Ltd

Parameter

Tech. parameters		Unit	Data
			20KA	25KA	31.5KA	40KA
Rated voltage		KV	12
Maximum working voltage		KV	12
Rated current		A	630-1250	630-1250	630-2000	1250-4000
Rated short circuit breaking current		KA	20	25	31.5	40
Rated short circuit making current		KA	50	63	80	100
Rated peak withstand current		KA	50	63	80	100
4S rated short circuit withstand current		KA	20	25	31.5	100
Rated insulation level	Power-frequency withstand voltage (before and after rated breaking)	KV	42(fracture 48)
	Impulse withstand voltage (before and after rated breaking)		75(fracture 84)
Rated operating sequence			Break-0.3s-Make and Break-180s-Make and Break
Mechanical life		Times	20000
Rated short circuit breaking current breaking times		Times	50
Rated making voltage of operating machinery (DC)		V	AC/DC 110/220
Rated breaking voltage of operating machinery (DC)		V	AC/DC 110/220
Clearance between open contacts		mm	11±1
Overtravel (contact spring compression length)		mm	3.5±0.5
Different phases of three-phase opening/closing		ms	≤2
Contact closing bounce duration		ms	≤2
Average breaking speed		m/s	0.9-1.2
Average making speed		m/s	0.5-0.8
Opening time		ms	20-60
Closing time		ms	≤70
Main circuit voltage of each phase		(μΩ)	630≤50 1250≤45	1600-2500≤40		3150≤35
Allowable cumulative wear thickness of dynamic and static contacts		mm	30

Key Features & Technical Advantages：

Dual Operating Mechanism Options: Offers two types of operating mechanisms—spring mechanisms and permanent magnet mechanisms—to suit various operational preferences.
Flexible Installation Modes: Can be used either as a fixed installation unit or configured with a dedicated propulsion mechanism to form a handcart unit.
High Operational Endurance: Specially optimized for frequent switching operations under rated working currents.
Frequent Short-Circuit Interruption: Engineered to reliably handle multiple interruptions of short-circuit currents.

Typical Application Scenarios：

3-10kV AC Power Systems: Deployed as indoor switchgear for power grid protection and control.
Industrial & Mining Enterprises: Acts as a primary protection and control unit for factory and mining power equipment.
Frequent Operation Environments: Ideal for sites requiring frequent working-current operations and multiple short-circuit current interruptions.

Why Choose Chennuo Electric?

Industry-Standard Reliability: The ZN63A (VS1)-12 is a globally trusted architecture renowned for its robust indoor performance and safety.
Versatile Adaptability: Supports both fixed and handcart configurations alongside spring or permanent magnet options to seamlessly integrate into diverse switchgear setups.
Built for High-Stress Duty Cycles: Excels in heavy-duty environments that demand high-frequency operations and dependable short-circuit clearance.
Responsive Global Support: Backed by professional engineering expertise to assist with selection, datasheets, and international export logistics.

Frequently Asked Questions (FAQ)

Q1: What are the alternative designations for the VS1-12 circuit breaker?
A: It is also widely referred to as the ZN63A-12 indoor high-voltage vacuum circuit breaker.

Q2: What power systems are compatible with the ZN63A(VS1)-12?
A: It is designed for use in 3-10kV AC 50Hz power systems as indoor switchgear.

Q3: What operating mechanisms are available for this series?
A: This model features two types of operating mechanisms: spring mechanisms and permanent magnet mechanisms.

Q4: Can this circuit breaker be used in handcart switchgear cabinets?
A: Yes. It can serve as a fixed installation unit or be paired with a dedicated propulsion mechanism to form a handcart unit.