Emerson ASCO ATS Switchboards, ASCO Three-Source System, ASCO Two-Source Automatic Transfer System, ASCO Custom Applications Brochures and Data Sheets

Suitable for Emergency, Peak and Prime Power System Applications

Low Voltage Automatic Transfer

Switch Systems

THE POWER AUTHORITY

THE POWER AUTHORITY

ASCO’s experience and commitment to excellence in designing and building Emergency Power Control Systems for any application has made us the premier manufacturing and service organization in the world.

For over 100 years we have built upon a tradition of providing our customers a full range of high performance and quality products. ASCO’s experience spans the history of the power control industry and since 1888 we have set the standard for the entire industry. Our reputation as the leader in emergency power control equipment speaks to the quality of our products and the dedication of our people.

ASCO operates two modern facilities dedicated to manufacturing low and medium voltage power control systems. Located in Parsippany, New Jersey and Stockton, California, these manufacturing plants produce state-of-the-art power control systems for emergency or standby power generation, peak load shaving, prime power, parallel with utility, cogeneration, emergency load management and power distribution. These products are designed and manufactured to meet and exceed the demands of a growing global market.

Our ongoing dedication to research & development and extensive testing have confirmed ASCO products as the industry standard. Since our beginnings this same dedication has established ASCO as the pioneering innovator in the emergency power control industry. This commitment continues to set ASCO apart as the company that stands at the threshold of new technologies and has resulted in a long list of industry firsts throughout the years.

ASCO has always been committed to providing a full range of products with only one thing in mind... transferring power from an available source to a critical load. Telecommunications systems, data networks, industrial processes and critical installations demand proven emergency and standby power transfer solutions. As the worlds leader in emergency and standby power, ASCO products and systems safeguard your business... because we keep your power on.

Fig. 1 Parsippany, New Jersey, USA

Fig. 2 Stockton, California, USA

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Automatic Transfer Systems

Product Overview

Content	Page
Service Entrance Rated Transfer System	............................................. 4
ATS Switchboard ..................................................................................	5
Two Source Automatic Transfer System ..............................................	6
Three Source ATS System ....................................................................	7
Three Source Priority System ..............................................................	8
Soft Load Transfer System ...................................................................	9
Custom Applications .......................................................................	10-11

For more information on ASCO Automatic Transfer Systems contact your nearest ASCO source at 800-937-ASCO or visit our website at www.asco.com.

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Service Entrance Rated Transfer System

ASCO service entrance rated transfer systems are designed for automatic switching of loads between the utility source and an alternate source of power. The transfer system also contains a disconnect device on the normal source, plus a disconnect link on the utility neutral, and a disconnect link between neutral and ground. If the utility source is Y connected, the voltage is greater than 250 volts phase to neutral and the system continuous current is greater than 1000 amperes, the utility disconnect device will be equipped with ground fault trip.

Figure 3 shows a typical service entrance rated transfer system with a 1200 ampere automatic transfer switch and a 1200 ampere utility circuit breaker.

Product Features

•The utility disconnect device will be equipped with ground fault trip if the voltage between neutral and ground is greater than 250 volts, and the continuous current is greater than 1000 amperes.

•Disconnect link for the utility neutral bus.

•Disconnect link between the neutral bus and the ground bus.

•Meets all NEC requirements for service entrance rating, and is labeled to UL 891 standards.

•Available up through 4000 amperes using ASCO 940, 962, 434, 436 and ASCO's new 7000 series automatic transfer switches.

Fig. 3 Service entrance rated transfer system.

Ground		Utility
Disconnect
Link
			Utility
Neutral			CB
Disconnect
Link	GFCT
N		Acc. 28
Load			ATS
Ø
			GFCT -
			Ground Fault
			Current
			Transformer
	N	Ø	ATS - Automatic
			Transfer Switch
		Emergency

Fig. 4 One line diagram of the service entrance rated transfer system shown in figure 3.

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