381333–067 H
50 Hanover Road, Florham Park, New Jersey 07932–1591 USA
For sales or service call 1 800 937–2726 (ASCO) www.ascopower.com
ASCO POWER TECHNOLOGIES CANADA PO Box 1238, 17 Airport Road, Brantford, Ontario, Canada N3T 5T3
telephone 519 758–8450, fax 519 758–0876, for service call 1 888 234–2726 (ASCO) www.asco.ca
Operator’s
Manual
Seri es 300
Automatic Transfer Switches
E de si gn, 260 an d 400 am p. si zes
DANGER is used in this manual to warn of high
voltages capable of causin g shock , burns, or death.
WARNINGisusedinthismanualtowarn
of possible personal injury.
CAUTIONisusedinthismanualtowarn
of possible equipment damage.
An experienced licensed electrician must install the ATS.
260 & 400 amp sizes
Refer to the outline and wiring drawings provided with
your ASCO Series 300 ATS for all installation details.
A SCO Series 300 A utomatic Transfer Switches (ATSs) are
Listed under Underwriters Laboratories UL 1008 Standard
for Safety for Automatic Transfer Switc hes . ASCO Series
300s are also Listed under CSA C22.2 No. 178 Standard for
Automatic Transfer Switches. All control features are UL
Component Recog nized, which assures that ASCO automatic
transfer switch es meet OSHA Safety Requiremen ts and wil l
be acc ep table to elec tric al inspec tor s.
ASCO Series 300 Automatic Transfer Switches are suitable
for emergency and standby system applications. They meet
emergency system rating requirements as defined in
National Electrical Code (NEC) Article 700 and UL 1008.
Also, they are suitable for the requirements of NEC Article
517 – Health Care Facilities, NEC Article 701 – Legally
Require d Standby Systems, NEC Article 702 – Optional
Standby Systems, NFPA 99 Health Care Facilities, and
NFPA 110 Emergency and Standby Power Systems.
Rating Label
Eac h automatic transfer sw itc h contains a r ating label to
define the loads and fault circuit withstand / closing ratings.
Refer to the lab el on the transfer switch for specific values.
Do not exceed the values on the rating label.
Exceeding the rating can cause personal injury
or serious equipment damage.
TABLE OF CONTENTS
section
INSTALLATION 1..........................
SEQUENCE OF OPERATION 2.............
TESTING & SERVICE 3....................
ADJUSTMENTS 4.........................
CONTROL FEATURES 5...................
INDEX back cover.........................
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