| Technical Details | |
|---|---|
| Rated short circuit breaking current (kA) | up to 31.5kA |
| Rated internal arc current (kA) | 25kA & 31.5kA |
| Power frequency withstand voltage (kV) | 28kV (for 1 minute) / 38kV (for 1 minute) |
| Lightning Impulse voltage (kV peak) | 75kV / 95kV |
| Degree of protection for enclosure | IP4X (Indoor) |
| Maximum design ambient temperature (ºC) | 50ºC |
| Design ambient temperature | Up to 55ºC |
| Rated current ratings are at an ambient of 40ºC | |
- Medium Voltage Power Distribution Solutions for primary and secondary distribution up to 24kV
- Indoor type air insulated switchgear having sheet metal enclosure with compartmental design.
- Main switching devices are draw-out type Vacuum or SF6 Circuit Breakers as per client requirement
- Designed as per IEC 62271-200 and service continuity & partition category LSC2B/PM as per IEC.
- Internal Arc design and protection classification – ALFR as per IEC
- Compatibility with latest measuring & protection equipment including advance numerical relays.
- Engineered as per specific application, requirement of market segments and clients.
- Draw-out & Fixed (RMU) type alternatives
- The switchgear is extensible type
Operation & maintenance interlocks provided for:
- Circuit breaker door with test / service position of switching device
- Earth switch operation with test / service position of switching device
- Secondary plug with test / service position of switching device
- Emergency trip facility
- Special interlocks as per application & client requirement
Enclosures:
Switchgear enclosures are self supporting type and are made of 2mm sheet steel. Load bearing members are of 2.5/3mm sheets. Fabrication of sheet components is done using CNC & NC machines.
Fabricated components are powder coated or zinc plated for surface protection. The freestanding functional units are extensible type.
Components:
Power components like circuit breakers, current transformers, busbars are installed in separate compartment providing service continuity class LSC2B as per IEC 62271-200. Metallic partitions are provided to segregate these compartments. Busbar, Circuit breaker and Cable termination compartment are designed for internal arc protection.
Protection & Control:
LV control and protection apparatus is mounted in separate compartment installed on front side of the switchgear panel. The Switchgears offered are compatible with modern relays and monitoring equipment