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381333–067 K
50 Hanover Road, Florham Park, New Jersey 07932–1591 USA
For sales or service call 1 800 800–2726 (ASCO) www.ascopower.com
ASCO POWER TECHNOLOGIES CANADA PO Box 1238, 17 Airport Road, Brantford, Ontario, Canada N3T 5T3
Operator’s
Manual
Seri es 300
Automatic Transfer Switches
E–d es ig n, 260 an d 400 A
DANGER is used in this manual to warn of a
hazardous situation w hich, if not avoided, will
result in death or serious injury.
WARNING is used in this manual to warn of a
hazardous situation which, if not avoided, could
result in death or serious injury.
CAUTION is used in this manual to warn of a
hazardous situation which, if not avoided, could
result in minor or moderate injury.
Refer to the outline and wiring drawings provided with
your ASCO Series 300 ATS for all installation details.
Rating Label
Eac h autom atic transfer switc h contains a rating lab el to
define the loads and fault circuit w ithstand / closing ratings.
Refer to the label on the transfer switch for specific values.
Do not e xceed the values on the rating label.
Exceeding the rating can cause personal injury or
serious equipment damage.
An experienced licensed electrician must install the
Automatic Transfer Switch (ATS).
TABLE OF CONTENTS
section-page
INSTALLATION 1-1........................
Mounting a nd Line Connections 1-1.........
Engine Starting Contacts 1-2...............
Input / Output Label 1-2....................
Functional Test 1-3, 1-4, 1-5.................
SEQUENCE OF OPERATION 2-1...........
TESTING & SERVICE 3-1..................
Preventive Maintenance 3-1................
Transfer Test 3-1..........................
Disconnecting the Controller 3-1............
Manual Load Transfer 3-2..................
Trouble- Shooting 3-2......................
ADJUSTMENTS 4-1.......................
Time Delay and Sensor Adjustments 4-1.....
How to Change a Setting 4-2...............
CONTROL FEATURES 5-1.................
Engine Exercisers 5-1, 5-2, 5-3..............
Motor Load Transfer 5-4...................
Load Disconnect & Remote Control 5-4......
INDEX back of manual.....................