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Vacuum Circuit Breaker

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Vacuum Circuit Breaker Specification

IP Rating
IP54

Insulation Material
Vacuum, Epoxy Resin

Mounting Type
Floor / Panel Mounted

Humidity %
95% RH at 40C

Overheating Protection
YES

Surface Finish
Powder Coated

Efficiency
>98%

Feature
High Interruption Capacity, Arc Quenching, Maintenance Free

Shape
Rectangular

Connector Type
Copper Bus Bar

Power Factor
0.95

Operating Temperature
-10C to +55C

Product Type
Vacuum Circuit Breaker

Application
Industrial, Power Distribution, Substations

Protection Level
High

Frequency (MHz)
50/60 Hz

Rated Voltage
11 kV

Energy Consumption
Low

Output Type
Electrical Switchgear Output

Color
Grey and Red

Dimension (L*W*H)
650 mm x 470 mm x 1100 mm

Weight
Approx. 40 kg

Input Voltage
11 kV AC

Size
Standard

Phase
Three Phase

Connection Type
Fixed and Withdrawable

No Of Poles
3

Material
Epoxy Resin, Copper, Ceramic

Auxiliary Voltage
110V/220V AC/DC

Voltage Withstand
28 kV (1 min, Power Frequency)

Breaking Capacity
20kA/25kA/31.5kA

Closing Mechanism
Spring Operated

Rated Current
630A / 1250A / 2500A

Tripping Mechanism
Shunt/Undervoltage/Manual Trip Available

Arcing Time
<20 ms

Testing Standard
IEC 62271-100

Short Time Withstand Current
16kA/25kA for 3 sec

Mechanical Life
10,000 operations

Altitude
Up to 1000 meters above sea level

Interlock Feature
Electrical and Mechanical Interlock

About Vacuum Circuit Breaker

Vacuum Circuit Breaker

VCBs

Switchgears offers a wide range of Vacuum Circuit Breaker, which delivers excellent performance. In order to prevent fires and power surges, these circuit breakers are used in areas where electric crisis may occur. These circuit breakers finds application in medium voltage power system. The different types of Vacuum Circuit Breakers offered by us are:

RANGES

6.6kV VCB Indoor Panels

7.5kV VCB Indoor Panel

12 KV VCB Outdoor Roof Bush Panel

11kV Double Bus Bar VCB Panel with dual sequence isolator for each incoming source

11 KV VCB Trolley

22kV Integra Series VCB Panels

33 KV VCB Trolley

36 kV VCB Outdoor Panels

Outdoor Panel With TVM Vacuum Circuit Breaker

Ring Main Units upto 36kV Indoor & Outdoor

ADVANTAGES

Compact and robust design
Easy integration in cubicle
High safety, reliability and continuity of service
Long durability
Low-maintenance
Low contact transition resistance
Up to 10,000 switching operations (M2)
Optional: Integrated digital unit

APPLICATIONS

Control and protection of the power supply to motors, transformers, capacitors and other feeder circuits. Designed for indoor / outdoor use and is particularly suitable for

Electric power plants
Substations
Industrial plants
Commercial buildings
Pumping stations
Pipeline stations and
Transportation systems.
Large infrastructures: Airports, railways, etc.
Installation in AIS cubicles
Power stations: Wind farms
Utilities: Primary distribution substations
Industry: Chemical, Iron and steel, automobile, etc.

The V Series VCBs are available at rated voltages of 6.6 to 36 kV, with rated short-circuit breaking capacities from 25 to 40 kA.

SALIENT FEATURES

HIGH RELIABILITY:
Testing is performed by an independent testing team. Fully Insulated Design and all the operations are behind the closed doors.
All components, such as current transformers, voltage transformers and multifunction relays are made of the highest quality materials.
Our new generation design has reduced the number of parts, which reduces the chance of failure.

SAFETY:
Compartment partitions and an automatic shutter system completely isolate live parts.
Comprehensive interlocking mechanisms are used for Safe Operations. VCBs are designed to withstand the huge pressure and burning effect of the arc to withstand in the event of an internal arc fault.

HIGH PROTECTION:
Specially designed Multiple Protection Relays are installed to provide protection, measurement, communications and control functionality.

FLEXIBLE DESIGN FOR EASY INSTALLATION:
Flexible features like Readily extensible, Panels with main circuit and control cable entry from either the top or bottom are available for easy installation. Installation and testing duration are considerably reduced as the panel is tested in the factory and then delivered as a complete unit.

Superior Arc Quenching for Enhanced Protection

The VCB utilizes vacuum and epoxy insulation to achieve rapid arc quenching in less than 20 milliseconds, which minimizes wear and maximizes safety. This feature, coupled with high breaking capacities up to 31.5kA, safeguards power systems during severe fault conditions, reducing downtime and extending equipment life.

Reliable Performance and Durability

With a mechanical life of 10,000 operations, the breaker is built for longevity in high-demand environments. The powder-coated exterior and IP54 ingress protection ensure resistance to dust and moisture, while its operating temperature range from -10C to +55C and altitude suitability up to 1,000 meters allow for versatile deployment.

Flexible Installation and Low Maintenance

Available in both fixed and withdrawable types, the VCB can be installed as floor or panel mounted to suit various operational requirements. Its maintenance-free design, robust copper connections, and efficient heat dissipation ensure minimal intervention, supporting continuous operation with low energy consumption.

FAQs of Vacuum Circuit Breaker:

Q: How does the vacuum circuit breaker enhance safety in industrial power distribution systems?

A: The breaker employs rapid arc quenching in less than 20 ms, high breaking capacities up to 31.5kA, and dual electrical and mechanical interlocks. These mechanisms quickly interrupt fault currents, prevent arcing-related damage, and minimize the risk of electrical failures or hazards in substations and other critical environments.

Q: What are the installation options and connection types for this VCB?

A: This circuit breaker supports both fixed and withdrawable mounting, providing flexibility for floor or panel installation. Copper bus bar connectors are used for reliable electrical connections, ensuring optimal integration in new or existing switchgear assemblies within industrial or substation settings.

Q: When is maintenance required for this vacuum circuit breaker?

A: Thanks to its vacuum and epoxy resin insulation and maintenance-free design, routine maintenance is minimal. However, regular visual inspections, periodic functional testing, and adherence to the manufacturers recommendations ensure peak performance and extend the devices operational life.

Q: Where can this vacuum circuit breaker be used?

A: Ideally suited for industrial plants, power distribution systems, and substation switchgear, the VCB operates efficiently at altitudes up to 1000 meters and in environments with humidity up to 95% RH at 40C. Its IP54 rating protects against dust and water ingress, making it highly reliable in various installation conditions.

Q: What features contribute to the breakers long lifespan and reliability?

A: The use of high-quality materials like epoxy resin, copper, and ceramic, combined with efficient arc quenching and a spring-operated closing mechanism, grants the breaker a mechanical life of 10,000 operations. Its robust construction and compliance with IEC 62271-100 ensure sustained, dependable operation.

Q: How does the breaker protect against overheating and power surges?

A: Integrated overheating protection and a low energy consumption design work together to safeguard internal components. The VCBs fast tripping (shunt, undervoltage, or manual) and high power factor (0.95) also help maintain stability and protect downstream equipment from damage during abnormal events.

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