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!
IMPROPER POWER CABLE CONNECTIONS CAN
CAUSE EXCESSIVE HEAT AND SUBSEQUENT
EQUIPMENT FAILURE.
Tighten cable lugs to the torque identified on the label
affixed to the unit immediately adjacent to the lugs.
4.5 WIRING
!
POWER CONDUCTORS AND CONTROL WIRING
MAY HAVE VOLTAGE PRESENT THAT CAN CAUSE
SEVERE PERSONAL INJURY OR DEATH. DE-ENER-
GIZE ALL POWER OR CONTROL CIRCUIT CONDUC-
TORS BEFORE BEGINNING TO PERFORM ANY
WIRING ACTIVITY TO OR WITHIN THE TRANSFER
SWITCH EQUIPMENT.
!
CHECK THE TRANSFER SWITCH EQUIPMENT
NAMEPLATE FOR RATED VOLTAGE. IT SHOULD
BE THE SAME AS THE NORMAL AND EMERGENCY
LINE VOLTAGES. OPERATING THE EQUIPMENT ON
IMPROPER VOLTAGE CAN CAUSE EQUIPMENT
DAMAGE.
4.6 INSTALLATION
In a typical installation for critical loads (Figure 4-6), the
automatic transfer switch (ATS) (1) and the generator (2)
are connected to the residential power supply. The ATS
(1) and emergency distribution panel (3) receive normal
power from a dedicated breaker in the utility service panel
(4). The ATS and emergency panel receive emergency
power from the generator (2). Power from the utility feeds
the utility panel.
When normal power fails, the ATS will sense the failure,
start the generator, and switch all loads to the emergency
panel. All emergency loads will receive power from the
CAUTION
WARNING
CAUTION
generator. A line breaker is required between the emer-
gency source (generator) and the transfer switch (Figure
4-8). When normal power returns, the ATS will switch all
power back to the utility and shut down the generator.
In addition, another typical installation for household
loads can be considered (Figure 4-7). Refer to Figure
4-9 for a household loads connection diagram.
4.7 ENGINE START CONNECTION
The engine control contact connections are located on
the lower right of the intelligence portion of the ATS.
NOTE: Prior to making the engine start connection to
the switch, set the engine generator controls selector
switch in the OFF position to prevent an unwanted
engine start. Connect the engine start wires to the red
terminal blocks marked 51 and 52. A contact closes
between these terminal blocks when an engine start sig-
nal is provided by the ATS logic. The wiring diagram
(Figure 7-1) provides additional engine start connection
information.
4.8 PRELIMINARY CHECKS
After the ATS enclosure is installed and power cables
are connected to the equipment, thoroughly inspect the
unit to ensure that no tools were left inside and that the
cabinet is free of debris. If necessary, use a vacuum
cleaner to remove any and all construction or installation
debris from the equipment.
Read and understand all labels on the equipment.
Review and understand the wiring diagrams supplied
with the equipment. Note any optional accessories that
may have been furnished with this unit and review their
operation.
Verify that the phase-to-phase line voltages of both the
normal and emergency power sources are the same
and that they match rated voltage as indicated on the
ATS ratings label.
!
SEVERE EQUIPMENT DAMAGE CAN RESULT IF
UNIT IS NOT APPLIED AT PROPER VOLTAGE.
DO NOT ENERGIZE EQUIPMENT IF SUPPLY VOLT-
AGES DO NOT MATCH EQUIPMENT RATINGS
LABEL. CONTACT THE FACTORY FOR INSTRUC-
TIONS TO MODIFY THE VOLTAGE RATING IN THE
FIELD.
I.B. ATS-RM05
CAUTION
Effective 6/01
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