VMX
Indoor Vacuum Circuit Breaker

The vertically isolated vacuum circuit breakers was introduced in 1985, in the well-established range of distgribution switchgear of AREVA T&D. This principle combined the advantages of British and International operating practices with modern vacuum technology. The type VMX design utilises time tested mechanism and AREVA make contemporary technology interrupters. VMX panels have logged more operation hours in the field than any other design in the country, having a presence of three decades. The moving portion comprises a truck-mounted circuit breaker with operating mechanism and incorporates vacuum interrupters manufactured in-house by AREVA T&D. VMX range is the simple, robust & time tested equipment which is tested for internal arc. With simple operating mechanism and linkages VMX range is the most reliable switchgear. It uses breaker transfer principle for earthing which makes it safe. The trefoil arrangement allows lowest possible width (540mm). The in-house vacuum interrupter guarantees high life. It is a Metal Clad switchgear, fully insulated, dead front type with front door. Approximate Weight (kg) Type Current rating Moving portion Fixed portion Standard VMX 630 A 260 585 Standard VMX 1250 A 310 711 Dimension (mm) Type Current rating Moving portion Fixed portion Standard VMX* 606 1867 2000 Low width VMX# 540 1360 2000 Technical Specification Technical Specification Rated voltage 12kV Rated continuous current upto 1250 A Rated frequency 50 Hz Rated interrupting current upto 26.3 kA (rms) Rated making current 65.5 kA (p) Rated short time (3 sec.) current 26.3 kA (rms) Operating duty O-0.3 sec-CO-3 min - CO (rapid auto reclosing duty on request) Applicable standard IEC 60056 IEC 56 (1987) / IS 13118 (1991) Power frequency withstand voltage 28/35 kV (rms) Impulse withstand voltage 75k(p) Busbar rating upto 2000 A

AIR INSULATED METALCLAD SINGLE BUSBAR SWITCHGEAR 8BK88

Type 8BK88 metal-clad switchgear is horizontal isolation and horizontal drawout type (site extensible) in both directions for system voltage up to 12kV. The switchgear is designed for single busbar system and is fully compartmentalised. The design incorporates a set of interlocks for safe operation of the switchgear. 1.1 Application The switchgear is suitable for use as a distribution unit and a switching load. The switchgear: Is type tested and is supplied ready assembled. Incorporated with drawable vacuum circuit breaker or vacuum contactor. Is available for a rated voltage up to 12kV. Is free of standing type. Type tested according to the following standards: IEC 298-1990/1S 2729-1988

1.2 Design features 1.2.1. Switchgear layout Metal partitions subdivide each panel into Circuit breaker compartment (1, Fig.2) Busbar compartment (2, Fig.2) Cable and CT compartment (3, Fig.2) Low voltage compartment (4, Fig.2) Each individual compartment is a separate housing, which is assembled separately and bolted, together to form a panel. The outside covers are bolted to the frame and the doors are hinged.

EPE - 10F / 10D 12KV METALCLAD SWITCHGEAR

Switchgear Model   EPE 10F Single Bus EPE10D Double Bus Rated voltage kV 12 Power frequency withstand voltage kV/ 1min 28 Lightning impulse withstand voltaage kV, 1.2/50 µs 75 Rated frequency Hz 50 Short time withstand current kA / 3s 25 Peak withstand current kA 63 Rated normal current in busbar A 800/1250/2000   Stand degree of protection (1) Enclosure 3X Compartment 2X   Dimension Width mm 600 700 Depth mm 1850 1950 Height mm 2150 2400