Installation; Power Connections; Engine Start Control Connections - GE ZTS Series Operation And Maintenance

Installation

Turn OFF all power before installation, adjustment, or removal of transfer switch or any of its components.

Power Connections

GE Zenith transfer switches are supplied with UL listed
solderless screw type terminals as standard for the
Source 1, Source 2 and Load power connections.
Table 1 lists the number and sizes of cable lugs supplied
as standard for each switch amp rating.
Connect the Source 1, Source 2, and Load conductors
to the clearly marked terminals on the transfer switch.
Remove surface oxides from cables by cleaning with a
wire brush. Verify that all connections are correct before
tightening the lugs. All cable lug connections must be
tightened to the proper torque values as shown in
Table 2.
NOTE : Do not run cables or wiring behind
front-connected transfer switches.
Power Connections: Screw Type Terminals for External Power Connections
Source 1, Source 2 & Load Terminals
Switch Size
(Amps)
Cable Per Pole
40
80
100
150
200, 225, 2500
260, 300*, 400
600
800, 1000, 1200
1600, 2000
2600, 3000, 4000
Table 1
Engine Start
Control Connections
Engine-start control wires connect to control terminals
beside the Entelli-Switch 250. Engine start terminals are
indicated by a schematic symbol (the symbol indicates
the contact state for a de-energized normal source).
Figure 2 shows the engine-start contacts.
Make all other necessary control connections to the
control panel terminal blocks per the schematics
supplied with the ATS.
: All control wires (18-12
NOTE
torqued to 19 in/lbs.
2
ZTS / ZTSD Operation and Maintenance Manual (71R-3000)
DANGER
HAZARDOUS VOLTAGE
(Can Cause Severe Injury or Death)
Range of Wire Sizes
1 #8 AWG to 1/0
1 #8 AWG to 1/0
1 #8 AWG to 1/0
1 #8 AWG to 3/0
1 #6 AWG to 250 MCM
1 #4 AWG to 600 MCM
2 #2 AWG to 600 MCM
4 #2 AWG to 600 MCM
Line, Load and Neutral terminals are located in the rear of switch
and arranged for bus bar locations
) must be
AWG
45°
H
LIFTING EYES
CABINET
Figure 1
NOTE : When lifting the switch using a spreader bar,
height H must be equal to half of distance D.
Neutral Bar (When Required)
No. of Cables
3 #8 AWG to 1/0
3 #8 AWG to 1/0
3 #8 AWG to 1/0
3 #8 AWG to 300 MCM
3 #6 AWG to 300 MCM
3 #4 AWG to 300 MCM
8 #2 AWG to 600 MCM
12 #2 AWG to 600 MCM
Tightening Torque for Lugs
Socket Size
Across Flats
Lb. - In.
1/8 45
5/32 100
3/16 120
7/32 150
1/4 200
5/16 275
3/8 375
1/2 500
9/16 600
Table 2
SPREADER BAR
D
Range of Wire Sizes
Torque
Lb. - Ft.
4
8
10
12
17
23
31
42
50
GE Zenith Controls