VSG-40.5 series vacuum circuit breaker is a new type of three-phase 50Hz according to the unique design concept and combined with the market demand and development, the rated voltage of indoor switchgear 40.5kV, it can be provided to industrial and mining enterprises, power plant and substation as the control and protection of electrical equipment, and is suitable for frequent operation.
VBI indoor high-voltage vacum circuit breaker is an indoor device with three-phase AC 50Hz and rated voltage of 40.5kV. It can be used for the control and protection of electrical equipment in industrial and mining enterprises, power plants and substations, especially for places with frequent operations. The installation form of the circuit breaker in the switch cabinet can be either a fixed type or a withdrawable type installed on a trolley.VBI indoor high-voltage vacuum circuit breaker has reliable performance and is easy to install. It is the best choice for the control and protection of high-voltage transmission and distribution systems.
The VBI-40.5 Floor Mounted Vacuum Circuit Breaker is a high-performance, medium-voltage switching device designed for reliable protection and control of electrical systems rated at 40.5kV. Utilizing advanced vacuum interrupter technology, it ensures efficient arc quenching, minimal maintenance, and a long operational lifespan. Ideal for power distribution networks, industrial plants, and substations, this breaker combines robust construction with user-friendly operation.
Current Rating: Up to 2500A continuous, 31.5kA short-circuit breaking capacity.
Vacuum Interrupter: Hermetically sealed, maintenance-free, and environmentally friendly (no SF₆ gas).
Mechanism: Spring-operated or motor-driven储能 mechanism for quick closing/opening (<50ms).
Safety: Integrated anti-slip design, mechanical/electrical interlocks, and grounding switches.
Standards Compliance: Meets IEC 62271, GB/T 1984, and ANSI C37.04.
3.1 Pre-Installation Checks
Verify intact packaging and no physical damage.
Confirm rated parameters match system requirements.
Ensure a level, vibration-free concrete foundation.
3.2 Mounting Steps
Secure the breaker to the floor using anchor bolts (M16 recommended).
Connect primary busbars with torque settings per manufacturer specs (e.g., 50Nm).
Wire secondary control cables to terminals (labeled “Open/Close Coil,” “Auxiliary Contacts”).
Ground the breaker chassis securely (接地电阻 ≤4Ω)
4.1 Manual Operation
Closing: Rotate the manual handle clockwise until a “click” confirms engagement.
Opening: Press the red “Trip” button or pull the mechanical trip lever.
4.2 Electrical Operation
Apply 220VDC/110VAC to the closing coil (momentary pulse) for remote control.
Use the local/remote selector switch for mode.
4.3 Indicators & Alarms
Green LED: Breaker closed.
Red LED: Breaker open/tripped.
Alarm Contacts: Trigger for SF₆ pressure loss (if equipped) or spring
5.1 Routine Checks
Inspect contacts every 5,000 operations (via viewport).
Lubricate moving parts annually with high-temperature grease.
Test insulation resistance (>1000MΩ @5kV).
5.2 Common Issues
Failure to Close: Check control power, spring charge, or interlock conditions.
Excessive Heating: Tighten connections; measure contact resistance (<50μΩ).
De-energize the breaker before servicing.
Only trained personnel should perform maintenance.
Never operate with visible damage or abnormal noises.
Dispose of vacuum interrupters as electronic waste (non-hazardous).
Recycle metals and plastics per local regulations.
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After adjusting the circuit breaker, the mechanical characteristic parameters are shown below:
1. Ambient temperature: -10C ~ +40C (It allows storage and transportation at -30 degrees centigrade);
2. Ambient humidity: the average humidity of a day should be no more than 95%. The average humidity of a month should be no more than 90% ;
3. Saturated vapor pressure: the average pressure of a day should be no more than 2.2kPa; the average pressure of a month should be no more
than 1.8kPa;
4. Altitude:≤1500m;
5. Earthquake intensity:≤8 degree;
6. It should be installed in the place without fire, explosion, serious filth, and chemical erosion and violent vibration.
Q1: Are you a manufacturer or a trader?
A1: We are a leading professional manufacturer.
Q2: How long is your delivery cycle?
A2: It depends on your product requirements and quantity. Generally, 5 to 10 working days are required for delivery
Q3: What is your after-sales service?
A3: We can answer users' questions solve their problems 24 hours a day, and provide comprehensive technical support for all our products promptly.
Q4: How do you solve quality problems?
A4: Please provide detailed photos of the quality problems. Our technical and quality inspection departments will analyze them. We will give a satisfactory solution within 2 days.
Q5: Do you accept customized services?
A5: We provide OEM/ODM services and can print your logo on the products. Our professional technical and quotation team can provide satisfactory projects according to your drawings and parameters.
Factory
Certificate
Address
No.1083 Zhongshan East Road, Yinzhou District, Ningbo City, Zhejiang Province, China
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