VSM-12 indoor permanent magnetic vacuum circuit breaker is used for rated voltage 12kV, AC 50/60Hz indoor switchgear, adopting monostable permanent magnetic actuator, frame one-piece layout.

Suitable for all kinds of industrial and mining enterprises, power grid equipment, trolley unit and KYN28A-12 switchgear supporting the use of the unit, but also can be used as a fixed unit with the corresponding position interlocking, used in the XGN2 and other Fixed cabinet.

product-500-500

Product Specifications

Specification Sheet

No.	Name	Unit	Data
1	Rated Voltage	kV	12
2	Rated Frequency	Hz	50/60
3	Rated Current	A	630/1250/1600/2000/2500/3150/4000
4	Rated Power Frequency Withstand Voltage	kV	48(Common value) /42(Across the isolating Distance)
5	Rated Lighting Impulse Withstand Voltage	kV	75(Common value) /85(Across the isolating Distance)
6	Rated Short-Circuit Breaking Current	kA	25/31.5/40
7	Rated Short-Circuit Making Current (Peak)	kA	63/80/100
8	Rated Withstand Current (Peak)	kA	63/80/100
9	Rated Duration of Short-Circuit	s	4
10	Operating Cycles at Rated Short-Circuit Breaking Current	Times	E2
11	Mechanical Endurance	Times	30000
12	Standard Operating Sequence	-	O-0.3s-CO-180s-CO O-180s-CO-180s-CO
13	Allowable Wear Thickness of Contact	mm	≤3

Mechanical Characteristics

No.	Name	Unit	Data
1	Clearance between Moved and Fixed Contact	mm	9±1
2	Contact Overtravel	mm	3.5±0.5
3	Average Closing Speed	m/s	0.6±0.2
4	Average Opening Speed (Average Speed of First Opening at 6mm)	m/s	1.1±0.2
5	Rated Contact Pressure	N	2500±200N(25kA) 3100±200N(31.5kA) 4800±300N(40kA)
6	Closing Time	ms	30～70
7	Opening Time	ms	15～50
8	Contact Bouncing Duration at Closing Operation	ms	≤3
9	No-Simultaneity of Closing/Opening Operations of 3-Phase	ms	≤2

Product Advantages

VSM-12 indoor permanent magnetic vacuum circuit breaker has many advantages:

Performance of circuit breaker：

E2-C2-M2

Stable and reliable:

the most monostable permanent magnetic actuator mechanism, the framework of the integrated layout, compared with the spring actuator mechanism to reduce about 60% of the parts of the mechanism, reducing the vast majority of mechanical failures, safe and reliable.

Good insulation performance:

the main conductive circuit adopts APG high-strength epoxy resin composite insulation type, with higher than the IEC standard insulation performance.

Wide range of use:

series products cover a wide range, from rated current 630A to rated current 4000A, from rated breaking current 20KA to 40kA comprehensive coverage; cover all environments within the altitude of 4500 metres.

Product Applications

1. Power plants

2. Industrial fields (chemical industry, steel, petroleum, coal, etc.)

3. Power grid system

4. Power infrastructure

Why Choose Us

product-717-476

Our Mission and Vision

Since our founding, we have been driven by a mission to revolutionize power transmission and distribution systems. Our vision is to expand our international market share and establish our VTZ brand as a symbol of quality and innovation in the electrical industry. We are committed to becoming a global leader, known for our dedication to advancing technology, ensuring quality, and prioritizing customer satisfaction.

After-sales and Service

We are committed to providing exceptional after-sales support to our global customers. Our services include worldwide technical support and warranty coverage, such as online remote technical support, video training, and on-site installation guidance. During the warranty period, we respond quickly to equipment defaults, and provide repair or replacement services, with the option to extend warranties as needed. To ensure effective communication, we also offer multilingual support and provide a comprehensive feedback mechanism that allows us to track customer satisfaction and continuously improve our service quality.

Excellence in research and development

Innovation is at the core of our business. We have independently developed the VTZ Series Vacuum Circuit Breakers and continue to invest in research and development to meet the evolving needs of the electrical industry. Our R&D team consists of senior technical experts with decades of experience in the design and manufacture of high and low voltage electrical equipment. Their expertise, combined with our advanced facilities, allows us to stay ahead of industry trends and continually optimize our product offerings.

Advanced manufacturing and production

We operate one of the most advanced and standardized assembly line manufacturing facilities in the industry, equipped with the latest technology, enabling us to produce a wide range of high quality electrical products with precision and efficiency. Wecomply with GB 1984-2024 and GB/T11022-2020 standards to ensure the highest quality. Our commitment to excellence is reflected in the durability, reliability, and compatibility of our products.

Adapting to industry trends

Guided by our strategic development plan, we continuously adapt our products to align with the latest trends in smart grids, power system automation, and high altitude environments. Our leading high-current, high-voltage, and long-life products are designed to meet the rigorous demands of today's power systems, providing our customers with reliable, maintenance-free solutions that stand the test of time.

Honors And Certifications

product-620-877 product-880-1274