| Brand | ROCKWILL |
| Model NO. | VD4 MV Vacuum Circuit Breakers |
| Rated voltage | 12kV |
| Rated normal current | 630A |
| Rated frequency | 50/60Hz |
| Series | VD4 |
Descaiption
VD4 MV Vacuum Circuit Breakers are high-reliability switching solutions for 12kV–40.5kV medium-voltage distribution networks. As standard and versatile equipment, they suit all primary applications, including power utilities, industrial parks, renewable energy stations, and commercial buildings, perfectly supporting smart grid and distribution automation upgrades. Featuring 30,000 overhaul-free mechanical operations across most ratings, they drastically reduce maintenance costs. Equipped with a modular spring-operated actuator for easy operation, the fully sealed vacuum interrupter ensures excellent arc-extinguishing and insulation performance, enabling stable work in harsh environments like high humidity, dust, and extreme temperatures. With a complete, standardized range of accessories and spare parts, installation and replacement are simplified. Compliant with IEC/ANSI standards, they support remote control and intelligent monitoring, enhancing power supply reliability and operational safety.
Feature
Technical Parameters
| Rated voltage | 12...24 kV |
| Withstand voltage at 50Hz | 38...65 kV / 1 min |
| Impulse withstand voltage | 75...125 kV |
| Rated frequency | 50/60 Hz |
| Rated normal current | 630...4000 A |
| Rated breaking capacity | 20...40 kA |
| Rated 4 s withstand current | 20...40 kA |
| Making capacity | 50...100 kA |
| Operation sequence | O-0.3 s-CO-15 s-CO |
| Opening time | 33...60 ms |
| Arcing time | 10...15 ms |
| Total breaking time | 43...75 ms |
| Closing time | 50...80 ms |
| Operating temperature | -15 ... +40 °C |
| Operating voltage | 24...250 V |
| Secondary withstand voltage | 2000V 50Hz (1 min) |
| Circuit breaker class | E2, C2, M2. |
VD4 MV vacuum circuit breakers offer 30,000 overhaul-free mechanical operations, modular spring-actuated design for easy use, and sealed vacuum interrupters. They excel in harsh environments, comply with IEC/ANSI standards, and support distribution automation.
VD4 medium-voltage vacuum circuit breakers are ideal for 12kV–40.5kV systems, including power utilities, industrial parks, renewable energy stations, and commercial buildings, enhancing power supply reliability and grid safety.
