Name: China ABB Fixed Type Vacuum Circuit Breaker Alternative Replacement and Retrofit Solution Manufacturers Suppliers Factory
Brand: XDTZ
SKU: 259390962

The VTZ-12 indoor high-voltage vacuum circuit breaker (a special model developed by Tongzhong Electrical Appliances) is designed for indoor switchgear with a rated voltage of 12kV and an AC frequency of 50/60Hz. It adopts a modular operating mechanism and is suitable for various industrial and mining enterprises, power grid equipment, and medium-voltage power distribution applications.

The circuit breaker can be configured as a withdrawable trolley unit for use with KYN28A-12 switchgear, or as a fixed unit with corresponding mechanical interlocking components for XGN2 and other fixed-type switchgear cabinets. Its flexible configuration allows it to meet different installation and application requirements.

This solution is designed as an ABB Fixed Type Vacuum Circuit Breaker Alternative Replacement and Retrofit Solution, providing reliable switching performance and good compatibility with existing equipment. It offers customers a practical and cost-effective option for equipment replacement, upgrading, and retrofit projects, while reducing the need for extensive modifications to the existing switchgear.

About us

Founded in 2014, Shaanxi West Power Tongzhong Electrical Co., Ltd. is a professional manufacturer and innovator in the electrical industry, backed by more than 20 years of industry experience. We are committed to the research, development, manufacturing, and supply of reliable high- and low-voltage electrical equipment, with a strong focus on vacuum circuit breakers and related electrical products.

Strategically located at No. 1 East Gaoxin Avenue, High-Tech Development Zone, Baoji City, Shaanxi Province, China, our facility benefits from convenient transportation and excellent regional connectivity. The surrounding transportation network, including major expressways and high-speed railway services, provides efficient access to major domestic cities and logistics hubs.

Advanced Manufacturing and Production

We operate one of the most advanced and standardized assembly-line manufacturing facilities in the industry, equipped with modern production equipment and advanced testing technology. This enables us to manufacture a wide range of high-quality electrical products with greater precision, efficiency, and consistency.

We comply with GB 1984-2024 and GB/T 11022-2020 standards and implement strict quality control throughout the production process to ensure reliable product performance. From component assembly to final testing, every stage is carefully controlled to maintain consistent quality.

Our commitment to continuous improvement and manufacturing excellence is reflected in the durability, reliability, stable performance, and compatibility of our products, providing customers with dependable electrical solutions for various applications.

xdtz

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
4	Rated Power Frequency Withstand Voltage	kV	48(Common value)/42(Across the isolating distance)
5	Rated Lightning Impulse Withstand Voltage	kV	95
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	Cycles	E2
11	Mechanical Endurance	Times	10000
12	Standard Operating Sequence	-	O-0.3s-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	0.7±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)
6	Closing Time	ms	30～70
7	Opening Time	ms	20～50
8	Contact Bouncing Duration at Closing Operation	ms	≤2
9	No-Simultaneity of Closing/Opening Operations of 3-Phase	ms	≤2

Product Advantages

3AE Siemens Circuit Breaker Retrofit has many advantages:

Circuit Breaker Performance

Meets E2-C2-M2 performance requirements, ensuring reliable electrical and mechanical endurance as well as stable switching performance under demanding operating conditions. This makes the circuit breaker suitable for applications requiring frequent operation and reliable fault interruption.
Easy Maintenance

The modular mechanism design allows for the replacement of closing and opening coils without the need to dismantle other components. Users can easily replace the coils, and no testing or adjustment is required after replacement, making future operation and maintenance more convenient.
High Conductivity

Features a well-designed conductive circuit that meets the temperature rise requirements at 1.1 times the rated current, ensuring reliable current-carrying capacity and stable electrical performance. The optimized design also helps reduce heat accumulation during continuous operation and enhances the overall reliability of the circuit breaker.
Large scope of use

series products cover a wide range, from rated current 630A to rated current 5000A, from rated breaking current 20KA to 50kA comprehensive coverage; cover all environments within 4500 metres above sea level; cover the -40 ℃ ~ 40 ℃ use of the environment.

Product Applications

3AE Siemens Circuit Breaker Retrofit has many applications:

MV Switchgear supplier

Power plants

Industrial fields

Power grid systems

Power infrastructures

Product Outline Drawing

Secondary Wiring Diagram

Reliable Vacuum Circuit Breakers, Customized for Global Clients
Professional Technical&Sales Team | On-Time Delivery

12~40.5KV indoor&outdoor vacuum circuit breaker

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ABB Fixed Type Vacuum Circuit Breaker Alternative Replacement and Retrofit Solution