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Zenith ZBTS T-series 100-1200A, INSTALLATION AND OPERATING INSTRUCTION
—
7.2 Installation
7.2.1 Power Connections with Screw
Type Terminals (as standard)
ABB Zenith Bypass-isolation automatic
transfer switches are supplied with UL
listed solderless screw-type terminals as
standard for the Source 1, Source 2 and
Load power connections.
Connect the Source 1, Source 2 and Load
conductors to the clearly marked termi-
nals on the busbars, see Fig. 7.4:
1 Source 1 Connectors
2 Source 2 Connectors
3 Load Connectors
Remove surface oxides from cables by
cleaning with a wire brush. Verify that all
connections are correct places before
tightening the terminals. All connections
must be tightened to the proper torque
values as shown in Table 7.1.
Warning
Torquing srew-type terminal or compression
lugs with the improper tool and/or to a torque
value exceeding the defined parameters may
result in damage to the switch.
Danger
Hazardous voltage may be present. Only an au-
thorised electrician may perform the electri-
cal installation and maintenance of OX_ auto-
matic transfer switches. Do not attempt any
installation or maintenance actions when By-
pass-Isolation automatic transfer switch is
connected to the electrical mains. Before
starting work, make sure that the switch is
de-energised.
Warning
The cable lug must be pushed into the oval
hole of the terminal as close as possible to the
switch pole.
ZBTS T-series Al/Cu UL Listed Solderless Screw-Type Terminals for External Power
Connections
Model Amperage Cables
per
phase &
neutral
Lug Type Cables
per
pole
Range of wire sizes Cables -
Tightening
Torque*,
lb-in (Nm)
ZBTS
)
/
)
)
)
* Do not exceed this value - may cause damage to switch, voiding warranty
—
Table 7.1 Tightening torque and wire size for screw-type terminals, see Fig. 7.5
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