Indoor Side Mounted 12Kv Vacuum Circuit Breaker for High Voltage

Indoor high voltage side mounted vacuum circuit breaker (circuit breaker) is suitable for indoor switchgear of 12kV/24kV power system. As a protection and control unit for power grid equipment and industrial and mining enterprise power design, it is suitable for switching various loads of different nature, frequent operations, and multiple interruption of short-circuit current.

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12Kv 24Kv Indoor Side Mounted Vacuum Circuit Breaker High Voltage VCB

Vacuum Circuit Breaker 

Product Description

The product adopts a new type of circuit breaker operating mechanism,

  1. The primary part of circuit breaker can use solid-sealed pole poles of international brands, and the vacuum interrupter and main conductive circuit parts can be solid-sealed into a whole
  2. Protect the interrupter from impact, dust and condensation
  3. Strong environmental adaptability, greatly reducing operation and maintenance costs
  4. The operating mechanism is integrated with the circuit breaker body, which has been verified by type tests
  5. With E2 electrical life, M12 mechanical life
Environmental requirements
  1. Ambient temperature: highest temperature + 4O℃, lowest temperature -15℃
  2. Environmental humidity: daily average relative humidity ≤95%, monthly average relative humidity: ≤90%, daily average vapor pressure ≤22×10-3MPa, monthly average vapor pressure ≤1.8×10-3MPa.
  3. Altitude: not more than 1000m;
  4. The earthquake intensity does not exceed 8 degrees;
  5. The surrounding air is not significantly polluted by dust, smoke, corrosive and/or flammable gas, steam or salt spray.

Note: If it exceeds the requirements of the above normal use environmental conditions, it is necessary to negotiate with the manufacturer.

Products based on standards

Comply with GB1984-2003 “High Voltage AC Circuit Breaker”, JB3855-1996 “3.6-40.5KV) Indoor AC High Voltage Vacuum Circuit Breaker” DL/T403-2000 “12-40.5KV High Voltage Vacuum Circuit Breaker Ordering Technical Conditions” and IEC62271-100 :2001 related requirements

Indoor Side Mounted 12Kv Vacuum Circuit Breaker for High Voltage

Technical parameters

ParameterUnitData
1Rated voltageKV12
2Rated currentA630-1250 1250 1250
3Rated short-circuit breaking currentKA20 25 31.5
4Rated short-circuit closing currentKA50 63 810
5Rated peak withstand currentKA50 63 80
64s rated short-circuit withstand currentKA20 25 31.5
7Rated insulation levelOperating withstand voltage (before and after rated opening)KV42 (break 48)
Impulse withstand pressure (before and after rated breaking)KV75 (break 85)
8Rated sequence of operationMinute-0.3s-sync Minute-180s-sync Minute
9Mechanical lifeTIMES1000
10Rated short-circuit breaking current breaking timesTIMES50
11Rated breaking voltage of operating mechanism (DC)V110, 220
12Rated breaking voltage of operating mechanism (DC)V110, 220
13contact opening distancemm11±1
14Overtravel (contact spring compression length)mm3.5±0.5
15Three-phase switching and closing bounce timems≤2
16Contact closure bounce timems≤2
17Average gate opening speedm/s1.1±0.2
18Average closing speedm/s0.6±0.2
19Switching timeAt maximum operating voltages≤0.05
At minimum operating voltages≤0.8
20Closing times0.1
21Allowable cumulative thickness of wear on
movable and static contacts
mm3

Drawing

12kv 24kv indoor side mounted vacuum circuit breaker high voltage vcb

Technical Support & FAQs

Our products are designed and manufactured in strict compliance with major international standards, including IEC 62271-100, IEC 62271-200 and IEEE C37.04 standards. All products are inspected by our Quality Control department.

We specialize in the medium-voltage range. Our vacuum circuit breakers and switchgear components are suitable for rated voltages from 7.2kV to 40.5kV. The normal current rating covers up to 4000A, and the short-circuit breaking capacity can be designed up to 40kA or higher to meet the demands of various applications, from simple distribution to heavy industrial use.

 Yes, customization is one of our core strengths. We understand that compatibility with existing equipment is critical. We offer OEM and ODM services and can customize components (like brackets, linkages, shutters) and modify breakers to be compatible with major switchgear brands such as Siemens, ABB, Schneider, GE, and others. Please provide your technical drawings or specifications for a precise solution.

Our quality assurance is embedded in every step of the process:

Material Sourcing: We use premium-grade raw materials and components from certified suppliers.

Manufacturing: Advanced CNC machinery and automated production lines ensure precision and consistency.

Testing: 100% routine tests (e.g., contact resistance, mechanical operation, HV withstand) are performed on every unit. We also conduct destructive and non-destructive tests on samples.

For standard products, our lead time is typically 1-4 weeks. For large or customized orders, the lead time will be confirmed based on the project's complexity and quantity.

Certainly. We provide comprehensive pre-sales and after-sales technical support. Our team of engineers can assist with product selection, technical drawings. We also offer detailed documentation, including manuals and drawings. In the rare event of an issue, we provide remote troubleshooting and have a efficient warranty claim process.

Our vacuum circuit breakers are engineered for superior performance and reliability, offering these key benefits:

High Breaking Capacity: Advanced vacuum interrupter technology ensures reliable interruption of high short-circuit currents.

Long Electrical and Mechanical Life: Designed for thousands of operations with minimal maintenance, significantly reducing life cycle costs.

Maintenance-Free Operation: The sealed vacuum interrupters eliminate the need for regular maintenance of the quenching medium, unlike oil or SF6 breakers.

Safety and Environmental Friendliness: They operate silently, are fire-safe, and contain no greenhouse gases (SF6), making them an eco-friendly choice.

Compact Design: Allows for space-saving switchgear designs, which is ideal for retrofitting or modernizing existing substations.

Our products are designed for global deployment. Please specify your environmental conditions for the most suitable product recommendation.

We stand behind our products with a standard 12-month warranty from the date of shipment, covering any defects in materials or workmanship under normal use and service conditions. Our warranty terms are clearly stated in our commercial contract.

 You can request a quote easily by clicking the Contact Us or  Request a Quote button. To provide you with the most accurate and competitive quotation, please have the following information ready:

Product name and model number (if known)

Technical specifications (such as Rated Voltage, Current, Short-circuit breaking current, etc.)

Quantity required

Any special requirements (customization, etc.)

Why Choose Us

technical support

Technical Support

From pre-sales consultation to after-sales service, we offer end-to-end technical support to maximize your project success. Our experts assist with product selection, system integration, troubleshooting, and maintenance, backed by continuous project tracking to keep your operations smooth and efficient.

customized solutions

Customized Solutions

We specialize in tailor-made solutions for switchgear and components, designed to fit your unique requirements. Our team collaborates closely with you to develop products optimized for performance, efficiency, and reliability—ensuring they excel in your specific application.

quality control

Quality Control

Quality is embedded at every stage. We rigorously test all materials prior to production and monitor manufacturing processes to ensure product stability. Before shipment, each unit undergoes comprehensive electrical, mechanical, and safety performance tests to comply with industry standards.

quick response (2) compressed

Quick Response

Our experienced service team provides 24/7 support year-round. Thanks to streamlined processes and a dedicated staff, we deliver 90% of quotations within 24 hours.

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