WARNING
For more information visit: www.generac.com
IB01602078E
Instruction Booklet
Page
2
Effective: September 2011
40-400A (480/600Vac) ATC-300+ 3-Postion
Contactor Based Transfer Switch
READ AND UNDERSTAND THE INSTRUCTIONS CONTAINED HEREIN-
AFTER BEFORE ATTEMPTING TO UNPACK, ASSEMBLE, OPERATE,
OR MAINTAIN THIS EQUIPMENT.
HAZARDOUS VOLTAGES ARE PRESENT INSIDE TRANSFER SWITCH
ENCLOSURES THAT CAN CAUSE DEATH OR SEVERE PERSONAL
INJURY. FOLLOW PROPER INSTALLATION, OPERATION, AND MAIN-
TENANCE PROCEDURES TO AVOID THESE VOLTAGES.
TRANSFER SWITCH EQUIPMENT COVERED BY THIS INSTRUCTION
BOOK IS DESIGNED AND TESTED TO OPERATE WITHIN ITS NAME-
PLATE RATINGS. OPERATION OUTSIDE OF THESE RATINGS MAY
CAUSE THE EQUIPMENT TO FAIL RESULTING IN DEATH, SERIOUS
BODILY INJURY, AND/OR PROPERTY DAMAGE. ALL RESPONSIBLE
PERSONNEL SHOULD LOCATE THE DOOR MOUNTED EQUIPMENT
NAMEPLATE AND BE FAMILIAR WITH THE INFORMATION PROVIDED
ON THE NAMEPLATE. A TYPICAL EQUIPMENT NAMEPLATE IS
SHOWN IN FIGURE 1.
Cat No: ATC3C3X30400WRU
Style No:
ASSEMBLED IN MEXICO
WITH U.S. COMPONENTS 30 - 43465
ITEM: 001
PIECE: 001
CS#: 123456
J050412234
Volts: 240
Poles: 3
Amps: 400
Phase: 3
Hertz: 60
Wire: 3/4
GO No: ABC0123
OF: 001
Figure 1. Typical Automatic Transfer Switch (ATS) Equipment
Nameplate.
All possible contingencies that may arise during installation, oper-
ation, or maintenance, and all details and variations of this equip-
ment do no purport to be covered by these instructions. If further
information is desired by the purchaser regarding a particular
installation, operation, or maintenance of particular equipment,
please contact an authorized Generac Sales Representative or the
installing contractor.
Section 1: Introduction
1.1 Preliminary Comments and Safety Precautions
This technical document is intended to cover most aspects asso-
ciated with the installation, application, operation, and mainte-
nance of the Automatic Transfer Controller (ATC-300+)
controlled contactor based ATS with ratings from 40 through
400 amperes (A). It is provided as a guide for authorized and
qualified personnel only. Please refer to the specific WARNING
and CAUTION in Section 1.1.2 before proceeding. If further infor-
mation is required by the purchaser regarding a particular installa-
tion, application, or maintenance activity, please contact an
authorized Generac sales representative or the installing contrac-
tor.
1.1.1 Warranty and Liability Information
No warranties, expressed or implied, including warranties of fit-
ness for a particular purpose of merchantability, or warranties
arising from course of dealing or usage of trade, are made regard-
ing the information, recommendations and descriptions contained
herein. In no event will Generac be responsible to the purchaser
or user in contract, in tort (including negligence), strict liability or
otherwise for any special, indirect, incidental or consequential
damage or loss whatsoever, including but not limited to damage
or loss of use of equipment, plant or power system, cost of capi-
tal, loss of power, additional expenses in the use of existing
power facilities, or claims against the purchaser or user by its
customers resulting from the use of the information and descrip-
tions contained herein.
1.1.2 Safety Precautions
All safety codes, safety standards, and/or regulations must be
strictly observed in the installation, operation, and maintenance
of this device.
WARNING
THE WARNINGS AND CAUTIONS INCLUDED AS PART OF THE PRO-
CEDURAL STEPS IN THIS DOCUMENT ARE FOR PERSONAL SAFETY
AND PROTECTION OF EQUIPMENT FROM DAMAGE. AN EXAMPLE
OF A TYPICAL WARNING LABEL HEADING IS SHOWN ABOVE TO
FAMILIARIZE PERSONNEL WITH THE STYLE OF PRESENTATION.
THIS WILL HELP TO INSURE THAT PERSONNEL ARE ALERT TO
WARNINGS, WHICH APPEAR THROUGHOUT THE DOCUMENT. IN
ADDITION, WARNINGS AND CAUTIONS ARE ALL UPPER CASE AND
BOLDFACE.
CAUTION
COMPLETELY READ AND UNDERSTAND THE MATERIAL PRESENTED
IN THIS DOCUMENT BEFORE ATTEMPTING INSTALLATION, OPERA-
TION, OR APPLICATION OF THE EQUIPMENT. IN ADDITION, ONLY
QUALIFIED PERSONS SHOULD BE PERMITTED TO PERFORM ANY
WORK ASSOCIATED WITH THIS EQUIPMENT. ANY WIRING
INSTRUCTIONS PRESENTED IN THIS DOCUMENT MUST BE FOL-
LOWED PRECISELY. FAILURE TO DO SO COULD CAUSE PERMANENT
EQUIPMENT DAMAGE.
