Emerson 300 Series manual Maximum Reliability & Excellent Value, Features

Series 300 Power Transfer Switches

Maximum Reliability & Excellent Value

With a Series 300 Transfer Switch, you get a product backed by ASCO Power Technologies, the industry leader responsible for virtually every major technological advance in the Transfer Switch industry.

The ASCO Series 300 was designed for one purpose–to automatically transfer critical loads in the event of a power outage. Each and every standard component was designed

by ASCO engineers for this purpose.

The rugged construction and proven performance of the ASCO Series 300 assure the user of many years of complete reliability. The Series 300 is even designed to handle the extraordinary demands placed on the switch when starting or restarting stalled motors and switching high inrush loads.

ASCO s Series 300 modular, compact design makes it easy to install, inspect and maintain. All parts are accessible from the front so switch contacts can be easily inspected.

Features

lThe Series 300 is listed to UL 1008 standard for Transfer Switch Equipment and CSA standard C22.2 for automatic transfer switches.

lMeets NFPA 110 for Emergency and Standby Power Systems and the National Electrical Code (NEC) Articles 700, 701 and 702.

l30 through 3000 amps in a compact design. l Available to 600 VAC, single or three phase.

l True double-throw operation: The single solenoid design is inherently interlocked and prevents contacts from stopping between sources or from being in contact with both sources at the same time.

UL Listed Withstand & Close-On Ratings

	Available Symmetrical Amperes RMS
Switch Ratings
	When Used		When Used
amps		Maximum
			With Specific
	With Current
		Voltage	Circuit Breakers
	Limiting Fuses
			@ 480V/60Hz
30 - 200	200,000	480v/60Hz	22,000
230	100,000	480v/60Hz	22,000
260, 400	200,000	480v/60Hz	42,000
600,800,1000,1200	200,000	600v/60Hz	65,000
1600, 2000	200,000	600v/60Hz	85,000
2600, 3000	200,000	600v/60Hz	100,000

Notes: 1. Current – limiting fuse should be Class J type through 400 amps: use Class L type above 400 - amp fuse rating

2. Refer to publication 1128 for specific manufacture’s breakers

Fig. 1: ASCO Power Transfer Switch rated 200 amperes shown in Type 3R enclosure

lThere s no danger of the Series 300 ATS transferring loads to a dead source because the unique ASCO single-solenoid operator derives power to operate from the source to which the load is being transferred.

lEasy-to-read flush-mounted control and display panel provides LED indicators for switch position and source availability. It also includes test and time-delay bypass switches as standard features.

lStandard engine exerciser for weekly automatic testing of engine generator set with or without load.

lAdjustable time-delay feature prevents switch from being activated due to momentary utility power outages and generator dips.

lSupplied with solid neutral termination. Optional switched neutral pole available.

lAccessory kits available.

lAvailable for immediate delivery.

lNow available for service entrance applications. Contact ASCO for assistance.

4