A.c. electrical connections – Winco ULPSS40/G WITH DSE 7310 CONTROL (2013) User Manual
Page 9
60706-216
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1270-00 REV 2
breaker panel, the battery tender is shipped already plugged into
the receptacle.
The engine blockheater installed on this unit\ should also be
plugged in this receptacle. The block heater is thermostatically
controlled and when plugged in will maintain the engine coolant
temperature between 100 and 120 degrees F.
MOUNTING THE AUTOMATIC
TRANSFER SWITCH (A.T.S.)
****************
***** WARNING *****
****************
FIRE HAZARD - All wiring must be done by a licensed electri-
cian, and must conform to the national electrical code and comply
with all state and local codes and regulations. Check with the
local authorities before proceeding!
INSTALLATION NOTES
Because of the many different types of service, feeder, and
distribution equipment, no specific wiring instructions can be
provided. It is recommended that only copper wire be used. In
all cases it is essential that while the load is connected to the
generator, there can be absolutely no feedback from the genera-
tor to the power line or the power line to the generator. When
properly installed, the normal A.T.S. Control and safety systems
will eliminate all paths for feedback.
To wire the automatic transfer switch into the existing wiring, first
determine which circuits will be on the emergency load circuit. If
the entire load is to be transferred, the transfer switch can be
wired in directly after the watt-hour meter and the service en-
trance, providing the service entrance ampere rating is within the
transfer switch’s rated capability.
If only specific circuits are to be powered under emergency power
failure conditions, an additional distribution panel designated
“emergency distribution panel” must be installed.
All selected emergency circuits are removed from main distribu-
tion panels and installed in the emergency distribution panel. The
A.T.S. is then installed between the main panel and the emer-
gency distribution panel. Suggested circuits: freezer, refrigerator,
furnace, emergency lights, sump pump, emergency outlet circuits,
etc. Total running load must not exceed generator rating.
A.C. ELECTRICAL
CONNECTIONS
NOTICE - CLASS 1 WIRING METHODS ARE TO BE USED FOR
ALL FIELD WIRING CONNECTIONS TO TERMINALS OF A
CLASS 2 CIRCUIT
Note: This symbol always indicates ground where
used.
INSTALLERS NOTE:
To access the AC and DC inter-
connections on this unit, open the single door on the
right hand side of the units. Then remove the safety
panel covering the mainline circuit breaker. All connec-
tion are behind this panel.
A - Neutral Lugs, These neutral lugs are isolated from ground
and provided for you to connect your neutral wire from the
transfer switch to. The lugs on the 40 kW will handle wire sizes
#4 AWG to 300 MCM and should be torqued to 250 in. lbs. The
lugs on the 30 kW will accommodate #4 AWG to 300 MCM and
should be torqued to 250 in. lbs.
B - Generator Circuit Breaker, This circuit breaker provides
overload protection for the generator. Your power feeds from the
transfer switch will connect to the bottom lugs on the circuit
breaker. The generator power feeds have already been wired
into the upper lugs.
The table below gives you the circuit breaker size, lug wire sizes
and torque specification. (see the actual breaker for additional
information and restrictions)
kW
Voltage PH
Amp
Wire Capability
Lug Torque
40
120/240
1
175
#4 AWG - 300 MCM 250 in lbs
40
120/208
3
150
#4 AWG - 300 MCM 250 in lbs
40
120/240
3
125
#4 AWG - 300 MCM 250 in lbs
40
277/480
3
60
#14 - #1/0 AWG
80 in lbs
30
120/240
1
125
#12 AWG -2/0 AWG 50 in lbs
30
120/208
3
100
#12 AWG -2/0 AWG 50 in lbs
30
120/240
3
90
#12 AWG -2/0 AWG 50 in lbs
30
277/480
3
45
#14 - #1/0 AWG
80 in lbs
Minimum Conductor Sizes between the Generator and the ATS.
Based on wire type and temperature rating. Wire has been
derated for 40
o
C ambient temperatures.
Cu Conductor
Al Conductor
C/B
Wire Temperature Rating
kW Voltage PH Amp 75
0
C
90
0
C
75
0
C
90
0
C
40 120/240 1
175
3/0 AWG 2/0 AWG 250 MCM 4/0 AWG
40 120/208 3
150
2/0 AWG 1/0 AWG 3/0 AWG 2/0 AWG
40 120/240 3
125
1/0 AWG #1 AWG 3/0 AWG 2/0 AWG
40 277/480 3
60
#4 AWG #6 AWG #3 AWG #4 AWG
30 120/240 1
125
1/0 AWG #1 AWG 3/0 AWG 2/0 AWG
30 120/208 3
100
#2 AWG #3 AWG 1/0 AWG #1 AWG
30 120/240 3
90
#2 AWG #3 AWG 1/0 AWG #2 AWG
30 277/480 3
45
#6 AWG #8 AWG #4 AWG #6 AWG
For additional information on wire sizing refer to table 310-16 of
the National Electrical Code ANSI/NFPA 70.