VMH Vacuum Medium Voltage Switchgear
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Our VMH switchgear is of the fl ush fronted, metalclad type with air insulated busbars and a horizontally isolated, withdrawable vacuum circuit breaker. Developed after the introduction of the type VMV Vacuum Switchgear, this unit offers the alternative horizontally isolated vacuum circuit breakers but in addition, provides options for an enhanced fault rating (31.5kA) and internal arc protection. The fi xed housing is segregated into three compartments - the busbar chamber, circuit breaker chamber and a chamber enclosing the cable terminations, various current and voltage transformers when required, and a circuit earth switch. VMH Vacuum Medium Voltage Switchgear Key Features » Integral Fault making Cable Earth » High Reliability » Minimal maintenance » Proven Service experience » Fully Interlocked » Front & Rear Cabling Access » Metalclad Construction » Absence of fi re risk » Pressure relief fl aps Rated Voltage kV 12 Rated Impulse Withstand kV 75/95 Rated Frequency Hz 50 Symmetrical Breaking Current kA Up to 31.5 Rated Short-Time Current kA 3secs Up to 31.5 Rated Peak Making Current kApk Up to 80 Current Ratings A 630/1250/2000 Busbar Ratings A Up to 2000 Degree of Protection in Service IP4X RATINGS your power in safe hands HAWKER SIDDELEY SWITCHGEAR

Version 02 - August 2008. The design and manufacture of our products are subject to constant review, therefore slight variations may occur between the details given and the equipment supplied. Hawker Siddeley Switchgear Ltd Tel: +44 (0)1495 223001 Email: sales@hss-ltd.com Hawker Siddeley Switchgear Pty Australia Tel: +61 (0) 7 3888 2333 Email: hssaus@hss-ltd.com Hawker Sideley Switchgear South America Tel: +57 (0)1 256 4617 Email: sales@hss-ltd.com Hawker Siddeley Switchgear Ltd Technology Centre Tel: +44 (0)1706 674000 Email: sales@hss-ltd.com Whipp & Bourne Inc. Tel: +1 (0) 757 858 8972...