Description:
The MINGTUO VD4 12kV Vacuum Circuit Breaker (VCB) is a medium-voltage indoor breaker designed to provide precise protection and control for three-phase AC systems operating at 50Hz, with rated voltages from 3.6kV to 12kV. Supporting rated currents from 630A to 1250A, this breaker is ideal for indoor switchgear installations in substations, industrial facilities, and commercial power distribution systems. Employing advanced vacuum interrupter technology, it ensures rapid fault interruption, operational reliability, and long-term safety.
Applications:
Indoor medium-voltage switchgear panels
Industrial plants requiring reliable MV protection
Commercial infrastructure including hospitals, airports, and data centers
Systems demanding frequent operation and low-maintenance solutions
 |
 |
 |
 |
 |
 |
Under normal conditions, main contacts remain closed to allow continuous current flow. Upon detecting overcurrent or a short-circuit, the spring mechanism quickly separates the contacts, producing an arc contained within the vacuum interrupter. The arc is cooled and extinguished, safely isolating the faulty circuit and preventing damage to downstream equipment. This ensures high operational reliability and minimal maintenance needs.
To ensure transportation safety, our electrical products are exported in reinforced wooden crates. The crates undergo heat treatment and bear the ISPM-15 mark, enabling swift customs clearance. The raised base design facilitates forklift operation, while internal shock-absorbing fastening ensures the products arrive intact. All exterior crates are clearly labeled and comply with international logistics standards.
Applications:
MINGTUO VCBs are essential components in medium-voltage electrical systems, providing both control and protection across a variety of scenarios:
Power Generation:
Generator protection and output control in thermal and hydropower plants
Integration with solar and wind energy systems
Auxiliary power distribution for plant equipment
Transmission & Distribution Networks:
Protection of substation feeders and distribution transformers
Ring main unit and indoor switchgear applications
Fault isolation in urban and industrial power distribution
Industrial Systems:
High-capacity motor protection in steel and manufacturing plants
Transformers and rectifier safeguarding in chemical facilities
Underground and surface power distribution in mining operations
Infrastructure & Public Services:
Railway and metro traction power supply systems
Airport, hospital, and data center backup power protection
Industrial parks and commercial building power distribution
Harsh or Special Environments:
Offshore platform electrical systems
Desert mining operations and extreme climate installations
High-altitude substations requiring robust, reliable breakers
|
|
|
|
|
|
 |
|
 |
 |
 |
 |
 |
 |
 |
 |
Applications:
The ZW28 Outdoor Vacuum Circuit Breaker is widely applied in:
Overhead medium-voltage distribution lines
Pole-mounted distribution systems
Outdoor substations and feeder protection points
Industrial power distribution networks
Renewable energy grid connection systems
Its design supports continuous outdoor operation while maintaining consistent switching performance and system protection.
 |
 |
 |
|
 |
 |
 |
|
 |
|
 |
|
Zhejiang Mingtuo Electrical Technology Co., Ltd. is a technology-driven enterprise specializing in the research, development, and manufacturing of low-voltage and medium-voltage circuit breakers. Low Voltage Air Circuit Breaker Suppliers. Leveraging Liushi’s comprehensive electrical industry chain and local advantages, we provide reliable and safe electrical protection products along with customized solutions for global industrial, commercial, and residential power distribution systems. We are committed to becoming a trusted electrical protection partner for global customers through professional engineering capabilities, consistent manufacturing quality, and flexible customization services.
Providing one-stop distribution solutions from ACB and MCCB to ATS and socket boxes, welcoming business opportunities in the Year of
This week, Mingtuo Electric announces a significant expansion of its motor protection portfolio with the official launch of three integrated
This week, Mingtuo Electric officially announced the launch of two new products to further improve its product solutions in the field of
Our goal is to help people in the best way possible. this is a basic principle in every case and cause for success. contact us today for a free consultation.
Sign up to our newsletter
Reviews
Clear filtersThere are no reviews yet.