Zago Electric
1 / 5
The 6.3KV switchgear, a key component in medium voltage (MV) power distribution systems, is designed to ensure safe and reliable electricity supply in industrial, commercial, and utility applications. As a type of HV switchgear, this metal-clad switchgear integrates advanced vacuum circuit breaker technology, offering superior performance and operational flexibility. The withdrawable design allows for easy maintenance and replacement of critical components, minimizing downtime and enhancing system availability. With a rated breaking capacity of 25KA, the 6.3KV switchgear meets the demanding requirements of modern power distribution networks, providing effective protection against overcurrent and short-circuit faults.
| Item | Unit | Numbers | |
|---|---|---|---|
| Rated insulation level | 1 min frequency withstand voltage (phase-to-ground/outlet) | kV | 42/48 |
| Rated insulation level | Lightning impulse withstand voltage (phase-to-ground/outlet) | kV | 75/85 |
| Rated Voltage | kV | 6.3KV 10KV 12KV 13.8KV 15KV 20KV 24KV | |
| Rated Frequency | Hz | 60/50HZ | |
| Rated current | A | 630~3150 | |
| Rated current of main busbar | A | 1250, 1600, 2000, 2500, 3150 | |
| Rated short-time withstand current(4s) | kA | 16, 20, 25, 31.5, 40, 50 | |
| Protection class | - | P4X for enclosure, IP2X for breaker door | |
The 6.3KV switchgear employs a metal-clad enclosure constructed from high-quality cold-rolled steel. The enclosure is divided into separate compartments, including the circuit breaker compartment, busbar compartment, cable compartment, and control compartment. This compartmentalization enhances safety by containing faults and preventing arc flash propagation.
The vacuum circuit breaker operates on the principle of arc quenching in a vacuum environment. When contacts separate, the vacuum interrupter rapidly extinguishes the arc within milliseconds. The system includes comprehensive protection functions like overcurrent, short-circuit, and earth fault protection monitored by microprocessor-based relays.
Widely used in industrial power distribution (manufacturing, processing plants), commercial buildings (shopping malls, hospitals), renewable energy systems (wind and solar farms), and utility substations.
Routine maintenance includes visual inspection, cleaning, tightness checks of electrical connections, and function testing of interlocks. Major maintenance involving vacuum integrity testing and contact replacement is recommended every 5-10 years.
A1: It is primarily used in medium voltage power distribution for industrial facilities, commercial buildings, renewable energy sites, and utility substations to ensure safe power control and protection.
A2: The withdrawable design allows the vacuum circuit breaker to be easily moved between test and disconnected positions, facilitating fast maintenance and replacement without shutting down the entire system.
A3: The enclosure is rated IP4X, providing protection against solid objects larger than 1mm, while the breaker compartment door opening is rated IP2X.
A4: It uses a vacuum interrupter where contacts separate in a vacuum. This environment has high dielectric strength, quenching arcs within milliseconds to interrupt high fault currents up to 25KA.
A5: Yes, it complies with IEC 62271-1:2017 and IEC 62271-200:2021, ensuring electrical performance, safety, and mechanical strength for global applications.
A6: Annual routine checks include visual inspections, cleaning, and functional testing. Major maintenance every 5-10 years involves testing vacuum integrity and replacing worn mechanical parts.
