MS1 3Phases VCB

Ultra-Fast Operation: Standard opening time under 5ms with minimal action dispersion.
Zero Bounce Stability: Ensures bounce-free closing throughout its entire operational lifespan.
Compact & Lightweight: Volume and weight reduced by 50-67% versus traditional switches.
High Reliability: Simplified magnetic drive structure eliminates mechanical failure points.
Energy-Efficient Design: Features low operating power and minimal standby energy consumption.
Intelligent Integration: Supports integrated design of primary and secondary systems.

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Describe Display

MS Series Circuit Breaker is a three-phase AC 50Hz/60Hz primary switching device rated for medium-voltage power systems. It is designed for breaking and closing load currents, overload currents, and short-circuit currents, mainly used in power distribution networks of substations, industrial and mining enterprises, and new energy projects requiring high reliability and fast action response.

Equipped with an advanced magnetically controlled shape memory alloy operating mechanism and monostable magnetic control structure, it achieves zero bounce during closing and ultra-fast action performance. The product can be paired with intelligent controllers to support distribution automation, remote control, and status monitoring functions, adapting to the development needs of modern smart grids.

Product parameters

No.	Item	Unit	MS1-01	MS1-02
1	Rated voltage	kV	12	12
2	Rated current	A	630	630
3	(1min)Rated power frequency withstand voltage	kV	42	42
4	Rated impulse withstand voltage	kV	85	85
5	Rated short circuit breaking current	kA	20	25
6	Rated peak withstand current	kA	50	63
7	Rated short-circuit withstand current	kA	20	25
8	Duration of short circuit	s	4	4
9	Rated frequency	Hz	50	50
10	Phase center distance	mm	150	150
11	Contact distance	mm	8±0.5	8±0.5
12	Over travel	mm	2±0.5	2±0.5
13	Rated operation cycle	-	O-0.3s-CO-15s-CO	O-0.3s-CO-15s-CO
14	Inherent closing time(don’t include DM time)	ms	＜25	＜25
15	Different time of closing operation	ms	≤2	≤2
16	Bouncing time	ms	≤2	≤2
17	Inherent opening time(don’t include DM time)	ms	5±0.5	5±0.5
18	Different time of opening operation	ms	≤2	≤2
19	Mechanical operations (CO-cycles)	Times	50000	50000
20	Rated short-circuit breaking current time	Times	50	50
21	Number of auxiliary switches	pcs	6NO+6NC	6NO+6NC
22	Weight	kg	32	32

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Service & Support

Our certification team consists of 85+ engineers with more than 20 years of professional experience

24/7 Service. Average emergency response time is limited to less than 12 hours

Suitable for substations, industrial power grids, new energy projects and other demanding scenarios

MS1 3Phases VCB

Applicable Environment/Application Scenarios