Editorial Reviews:
Synopsis
3-PH 30 AMP Designed for emergency and standby applications, this Generator ASCO Series 300 Automatic Transfer Switch has its contacts readily accessible for easy inspection and preventive maintenance. It has true double-throw, inherently interlocked construction and is mechanically held and electrically operated. This automatic transfer switch is 3-PH and 30 AMP. Features: -Close differential voltage sensing on all phases of normal source -Voltage sensing of emergency source, pickup adjustable from 85pct to 100pct of nominal -3 Second time delay to override momentary normal source outage to delay all transfer switch and engine-starting signals -Retransfer to normal time delay, adjustable from 0 to 30 minutes -5 Minute unloaded running time delay for emergency engine generator cool down -Transfer to emergency time delay, adjustable from 0 to 8 minutes for controlled timing of load transfer to emergency -Switch position indicating signal lights -Solid neutral plate -Excercise timer with 3 selector switch for; with load, without load, and off -Test switch to momentarily simulate normal source failure -Switch position indicating contacts rated 10 amps 480 volt AC -Gold plated engine start contacts
