China VD4 Medium-Voltage Indoor Vacuum Circuit Breaker Suppliers and Factory - 2.5 to 34.5kV, IEC 60694 Compliant
This circuit breaker is made with mature APG technology. The application of VB4P terminal buffer guarantees the indoor terminal is ever more reliable in any operation environment. VB4P can fully meet the requirement of GB, DL, IEC, DIN, VDE as well as standards of other advanced industrial countries.
General
VB4P medium-voltage indoor vacuum circuit breaker is applicable for three-phase AC power system of rated voltage up to 12~24kV and frequency 50/60Hz. It is widely used in many fields such as power plant, transformer substation, petrol chemical industry, metallurgy, manufacturing industry, airport, residential area, etc., to control and protect the electric equipment. Especially, it is used for the occasion that needs infrequent operation at rated current or multi-breaking short circuit current, and may be mounted in the indoor air insulating switchgear like type KYN28 or AMS, ABB type ZS1 series, etc. This circuit breaker complies with standards such as GB1984-2003, JB3855, DL/T403, and IEC60694.
Service Environment
🌡️
Air temperature: Maximum temperature: +40℃; Minimum temperature: -25℃.
💧
Humidity: Monthly average humidity 95%; Daily average humidity 90%.
🏔️
Altitude: Maximum installation altitude above sea level: 2500m.
🛡️
Ambient Air: Not apparently polluted by corrosive and flammable gas, vapor, etc.
🚫
Vibration: No frequent violent shake.
3D Mechanism Introduction
Innovative Product Design
Damper with perfect performance
Refined damper and new cam gear with curvilinear design reduce contact rebounding during opening, ensuring reliable operation and protecting the vacuum interrupter bellows.
Special design for repair
No special tools needed for disassembly. Secondary controlling components are located in front for convenient maintenance and repair.
Modularized operating mechanism
Divided into closing, opening, main axis, and secondary wiring modules. Standardized manufacturing ensures short production periods and rapid replacement.
Self-lubricative bearing without oil
Applicable to over-load and low-speed conditions, avoiding lubrication failure and enabling maintenance-free operation.
Conductors with silvered surface
Reduces contact resistance, improves conductivity, decreases heat generation, and lengthens the breaker's lifetime.
Single closing spring device
Self-lubricative Bearing without Oil
Conductors with Silvered Surface
Embedded Pole Design
✔ High Reliability
✔ Free Maintenance
✔ Stable Insulating Property
✔ Firm Structure
✔ Miniaturization
✔ Environmental Protection
Vacuum Interrupter with Excellent Performance
1. Unique R-shaped Contact Terminal Design
2. Complete One-Time Sea-Exhaust Technology
3. High & Stable Quality Ceramic Metallization Technology
4. Stainless Steel Direct Rivet Weld Technology
2. Complete One-Time Sea-Exhaust Technology
3. High & Stable Quality Ceramic Metallization Technology
4. Stainless Steel Direct Rivet Weld Technology
Installation Size
Frequently Asked Questions
Q1: What is the rated voltage range for the VB4P circuit breaker?
A: The VB4P medium-voltage indoor vacuum circuit breaker is designed for three-phase AC power systems with a rated voltage up to 12~24kV and a frequency of 50/60Hz.
Q2: What are the environmental temperature limits for operation?
A: The device operates reliably within an ambient air temperature range of -25℃ (minimum) to +40℃ (maximum).
Q3: Is the VB4P circuit breaker maintenance-free?
A: Yes, it features self-lubricative bearings without oil and an embedded pole design, which allows for maintenance-free operation and high reliability.
Q4: Which standards does this circuit breaker comply with?
A: It meets international and national standards including IEC60694, GB1984-2003, JB3855, and DL/T403, as well as DIN and VDE requirements.
Q5: What is the maximum installation altitude for the VB4P?
A: The maximum recommended installation altitude above sea level for the VB4P circuit breaker is 2500 meters.
Q6: What are the benefits of the silvered surface on the conductors?
A: The silvered process reduces contact resistance and improves electrical conductivity, which decreases heat generation and extends the mechanical lifetime of the breaker.