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VTZ-17.5 Vacuum Circuit Breaker
2.Rated Frequency : 50/60HZ
3.Operating Mechanism: Modular Mechanism
4.Installation Method: Center Mounted Hand Truck or Fixed Cabinet
5.Compatible Cabinet: KYN28-17.5 series switch cabinet, XGN fixed cabinet, HXGN series ring network cabinet.
6.Product compliance standards: GB/T1984-2014, GB/T11022-2011;
7.Product advantages: E2-C2-M2 performance, easy and convenient maintenance, high conductivity, stable performance and Support intelligent system.
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Product Introduction
VTZ-17.5 Vacuum Circuit Breaker(Tongzhong Electric special model) is used for rated voltage 17.5kV, AC 50/60Hz indoor switchgear, modular operating mechanism, suitable for a variety of industrial and mining enterprises, power grid equipment, handcar unit and KYN28A-17.5 switchgear supporting use, can also be used as a fixed unit and matched with the corresponding mechanical chain. Suitable for fixed cabinets such as XGN2.
Product Specifications
Specification Sheet
|
No. |
Name |
Unit |
Data |
|
1 |
Rated Voltage |
kV |
12 |
|
2 |
Rated Frequency |
Hz |
50/60 |
|
3 |
Rated Current |
A |
630/1250/1600/2000/2500/3150/4000/5000 |
|
4 |
Rated PowerFrequency Withstand Voltage |
kV |
48(Common Value) / 42(Across the Isolating Distance) |
|
5 |
Rated Lightning Impulse Withstand Voltage |
kV |
75(Common Value) / 85(Across the Isolating Distance) |
|
6 |
Rated Short-Circuit Breaking Current |
kA |
25/31.5/40/50 |
|
7 |
Rated Short-Circuit Making Current (Peak) |
kA |
63/80/100/125 |
|
8 |
Rated Withstand Current (Peak) |
kA |
63/80/100/125 |
|
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 |
|
13 |
Allowable Wear Thickness of Contact |
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) 4800±300N(40kA) 6000±500N(50kA) |
|
6 |
Make time |
ms |
30～70 |
|
7 |
Breaking time |
ms |
20～50 |
|
8 |
Contact bouncing duration at closing operation |
ms |
≤2 |
|
9 |
Closing/opening no-simultaneity of 3-phase contacts |
ms |
≤2 |
Product Advantages
VTZ-17.5 Vacuum Circuit Breaker has many advantages:
Performance of circuit breaker：
E2-C2-M2
Simple and convenient maintenance:
the use of modular mechanism, the replacement of the opening and closing coils do not need to dismantle the rest of the components, the user can be easily replaced, and no need to test and adjust after the replacement, so that the later operation and maintenance is more convenient.
High conductivity:
reasonable design of the conductive circuit to meet the 1.1 times the rated current temperature rise level.
Wide range of use:
the serialized 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 meters above sea level; cover the use of the environment of -40 ℃ ~ 40 ℃.
Support intelligent customization::
a. It can add a wireless temperature monitoring solution with self-powered design to ensure safety and maintenance-free operation.
b. It has a mechanical characteristics monitoring solution to provide real-time monitoring of circuit breaker operating data for early detection and resolution of potential problems.
c. It has a motorized cabinet entry solution to allow remote operation for ensuring personal safety.
d. Real-time component aging can be detected by partial discharge testing.
We can provide customized circuit breakers according to your requirements.we can provide the other current level and voltage level vacuum circuit breaker .
Product Applications
VTZ-17.5 vacuum circuit breaker has many applications:
Power plants
Industrial fields (chemical industry, steel, petroleum, coal, etc.)
Power grid systems
Power infrastructures
Product Outline Drawing
Figure 1: Handcart Type Outline Drawing
Figure 2: Handcart Type Outline Drawing
Figure 3: Handcart Type Outline Drawing(630-1600A)
Figure 4: Fixed Type Outline Drawing(2000-4000A)
Secondary Wiring Diagram
Figure 5: Handcart Type secondry wiring diagram
Figure 6: Fixed Type secondary wiring Diagram (2000-4000A)
company profile
Shaanxi West Power Tongzhong Electrical Co., Ltd. is a leading manufacturer with over 20 years of experience, specializing in high quality 7 to 40.5kV vacuum circuit breakers, switchgears, and a wide range of electrical products. Our advanced manufacturing process ensures reliable, durable solutions, especially our VTZ series vacuum circuit breakers, which are maintenance-free for up to 20 years. With a team of expert technicians, we excel in R&D, manufacturing, and after-sales service for both high and low voltage equipment, delivering excellence at every stage.
why choose us
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.
Wide range of products
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, and 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.
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