China VD4 Medium Voltage Indoor Vacuum Circuit Breaker - Reliable Suppliers from Factory, Rated 2.5-34.5kV
This circuit breaker is made with mature APG technology. The application of VB4P terminal buffer guarantees the indoor terminal is ever more reliable in nay 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,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, may be mounted in the indoor air insulating switchgear like type KYN28 or AMS, ABB type ZS1 series, etc. This circuit breaker is standards as GB1984-2003 AC high voltage circuit breaker,JB3855 3.6-40.5Kv indoor AC High voltage circuit breaker,DL/T403 Specification of 12-40.5Kv indoor High voltage vacuum circuit breaker for order as well as IEC60694.
Service Environment
🌡️
Air Temperature: Max: +40℃; Min: -25℃.
💧
Humidity: Monthly avg 95%; Daily avg 90%.
🏔️
Altitude: Maximum installation altitude: 2500m.
☁️
Ambient Air: Not polluted by corrosive/flammable gas or vapor.
🚫
Vibration: No frequent violent shake.
3D Mechanism Introduction
Innovative Product Design
Damper with perfect performance: Thanks to the refined damper with perfect performance and the new cam gear with curvilinear design, the contacts rebounding value during the breaker opening is reduced more and the breaker can be opened reliably.
Special design of repair: During the design for VB4P circuit-breaker, the installation and repair must be taken into account. Users need no special tools and the repair becomes more convenient.
Modularized operating mechanism: Divided into closing module, opening module, mainaxis module and secondary wiring module for standard manufacture and rapid replacing.
Self-lubricative bearing: Applicable to over-load and low-speed conditions, avoiding lost-lubricative phenomena.
Conductors with silvered surface: Reduces contacting resistance and improves electricity-conducting capacity.
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
Installation Size
Frequently Asked Questions
What is the rated voltage range for the VB4P circuit breaker?
The VB4P medium-voltage indoor vacuum circuit breaker is designed for three-phase AC power systems with a rated voltage of up to 12~24kV and a frequency of 50/60Hz.
What are the primary applications of this vacuum circuit breaker?
It is widely used in power plants, transformer substations, petrochemical industries, metallurgy, manufacturing, airports, and residential areas for controlling and protecting electrical equipment.
Does the VB4P require frequent maintenance?
No, the VB4P features self-lubricative bearings and an embedded pole design which allows for maintenance-free operation and high reliability under various conditions.
Which international standards does the VB4P comply with?
It meets several major standards including GB1984-2003, JB3855, DL/T403, and IEC60694, as well as standards from other advanced industrial countries like DIN and VDE.
What are the environmental limits for installation?
The unit operates within a temperature range of -25℃ to +40℃, can handle up to 95% monthly humidity, and is suitable for installations up to an altitude of 2500m.
What makes the modularized operating mechanism beneficial?
The modular design (closing, opening, mainaxis, and wiring modules) allows for standardized manufacturing, shorter production cycles, and much faster, more convenient component replacement.