VTZ-12T mine high explosive cabinet Improved vacuum circuit breaker (special model for Tongzhong Electric) is a special vacuum circuit breaker for underground mining with a rated voltage of 12kV and AC 50/60Hz.

It adopts a modular operating mechanism, and the mechanical manual closing and opening interfaces are led out from the top, which is convenient for users to use. It is suitable for various places with explosion-proof requirements for power facilities.
The trolley unit is used in conjunction with the PJG-10 switchgear, and can also be used for new combined high-explosive switchgear; this product focuses on increasing the installation position of the varistor to prevent line overvoltage.

We can offer a variety of mine-use vacuum circuit breakers.For more information ,pls contact us at any time. welcome to inquiry .

Product Specifications

Specification Sheet

No.	Name	Unit	Data
1	Rated Voltage	kV	12
2	Rated Frequency	Hz	50/60
3	Rated current	A	1250
4	Rated power-frequency withstand voltage	kV	48(Across the contact gaps ) /42(To ground )
5	Rated lighting impulse withstand voltage	kV	75
6	Rated short-circuit breaking current	kA	25/31.5
7	Rated-short-circuit making current (peak)	kA	63/80
8	Rated withstand current (peak)	kA	63/80
9	Rated duration of short circuit	s	4
10	Operating cycles at rated short-circuit breaking current	Times	E2
11	Mechanical endurance	Times	20000
12	Standard Operating sequence	-	O-0.3s-CO-180s-CO
13	All0wable wearing thickness of contacts	mm	≤3

Mechanical Characteristics

No.	Name	Unit	Data
1	Clearance between open contacts	mm	9±1
2	Over-travel	mm	3.5±0.5
3	Average closing speed	m/s	0.7±0.2
4	Average opening speed(average speed at 6mm of initial opening)	m/s	1.1±0.2
5	Rated added external contact final force	N	2500±200N(25kA) 3100±200N(31.5kA)
6	Make time	ms	30~70ms
7	Breaking time	ms	20~50ms
8	Contact bouncing duration at closing operation	ms	≤2
9	Closing/opening no-simultaneity of 3-phase contacts	ms	≤2

Product Advantages

VTZ-12T mine high explosive cabinet Improved vacuum circuit breaker has many advantages:

Performance of circuit breaker：

E2-C2-M2

Simple and convenient maintenance:

With modular structure, the replacement of closing and opening coils does not require the removal of other components. Users can easily replace them, and no testing and adjustment is required after replacement, making later operation and maintenance more convenient;

SAFE AND RELIABLE

The circuit breaker and the cabinet can achieve reliable mechanical interlocking to ensure the safety of operators; the configuration of electric chassis can realize unattended remote operation.

High conductivity:

Reasonable conductive circuit design meets the temperature rise level of 1.1 times the rated current;

Intelligent configuration:

a. Wireless temperature intelligent monitoring solution can be added for self-power design, which is safe and maintenance-free;

b. Mechanical characteristics monitoring solution, real-time monitoring of circuit breaker operation data, early detection and early resolution of hidden dangers;

C. Electric cabinet entry solution, remote operation to ensure personal safety;

D. The bureau's detection can detect the aging of original parts in real time.

Product Applications

VTZ-12T mine high explosive cabinet Improved vacuum circuit breaker has many applications:

Coal mining industry

Metal mining industry

Product Outline Drawing

VTZ-12T mine high explosive cabinet Improved vacuum circuit breaker in stock

Secondary Wiring Diagram

VTZ-12T mine high explosive cabinet Improved vacuum circuit breaker for sale

Shaanxi West Power Tongzhong Electrical Co., Ltd.

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.

We offer a wide range of products, including indoor and outdoor vacuum circuit breakers, switchgear, low voltage switch equipment, and various electrical accessories. Each product is designed to meet the specific needs of our customers, they can operate stably in urban distribution networks, industrial melting, new energy power generation, rural power supply and other places, and can still maintain excellent reliability even in harsh environments. Our VTZ Series have become important switch equipment in major fields and power systems throughout China, and their reputation for reliability has earned us the trust of customers nationwide.

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why choose us

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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

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