Fault Thrower 38kV 25kA Single Phase to earth fault making switch
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Key Features » Superior, proven Fit & Forget technology using a single phase vacuum interrupter driven by a magnetic actuator for fault initiation » The switch is housed in an aluminium tank, dielectric insulation is provided by SF6 gas » Connection to the system is achieved by either a separable connector or open terminal bushing » Manual release of the switch is available within the control cubicle housed under the tank Part of our Horizon family of products, the Fault Thrower provides a means of deliberately introducing a phase to earth fault in order to ensure remote end tripping of a circuit breaker, assuming pilot wires are not available for intertripping. The need to operate the remote circuit breaker can be due to equipment faults, such as thermal protection or low level fault currents that cannot be detected by the remote protection. A typical application is with transformer feeders to enable the remote feeder breaker to respond to the transformer local fault detecting relays, such as Buchholz protection, local earth fault protection etc. Fault Thrower 38kV 25kA Single Phase to earth fault making switch » The fault is 'thrown' through the aluminium tank, two earth points are provided for safely earthing the equipment steel work and to provide a fault path Rated Voltage kV 38 Short Circuit Making Current kA 25 Impulse Voltage Withstand kV 170 Power Frequency Withstand (Wet & Dry) kV 80 Control Voltage V dc 110 (48 & 220 Optional) Rated Frequency Hz 50/60 Rated 3 sec Short-Time Current kA 25 Peak Short Circuit Making Current kA 63 Peak Withstand Current kA 63 Internal Arc (EATS 41-36) kA 1sec 31.5 Fault Making Time 190ms Endurance at 25kA 50 makes Temperature Range ¢ªC -50 to +50 Weight Kg 500 RATINGS your power in safe hands HAWKER SIDDELEY SWITCHGEAR

Version 03 - 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...