www.weg.net
WEG Molded Case Circuit Breakers - User’s Manual
6
CAUTION
Overheating can cause nuisance tripping and damage tothe circuit breaker.
When aluminum conductors are used, the application of a suitable joint
compound is recommended to reduce the possibility of terminal overheating.
7. Connect line and load conductors and accessory leads.
Note: the circuit breakerissuitable for reverse feed application. Observe warning label on cover before attempting
to remove cover.
8. After the circuit breaker is installed, check all mounting hardware and terminal
connecting hardware for correct torque loading. Torque values for line/load
terminals are given in Table 2 and on the circuit breaker nameplates.
3. MANUAL OPERATION
Note: the trip unit and rating plug must be installed before attempting to close the circuit breaker.
Manual operation of the circuit breaker is controlled by the circuit breaker handle
and the PUSH-TO-TRIP button. The circuit breaker handle has three positions,
two of which are shown on the cover with raised lettering to indicate ON and OFF.
On the handle, ON, OFF, and trip are also shown by a color-coded strip for each
circuit breaker handle position: red for ON, white for tripped, and green for OFF
(see Figure 6).
Catalog number
Maximum
br
eaker Amps
Terminal body
material
Har
dwar
e
A
WG/MCM wir
e
Range / No. conductors
Metric wir
e
range mm
2
Wir
e type
Torque valves Lb-in
(N.m)
Wire lug
Mtg.
hardware
Wire
terminals
LT1A UBW1600
1600
Aluminium
Metric
500-1000 (4)
300-500
Cu/Al
550 (62)
300 (34)
LT1C UBW1600
1600
Copper
Metric
1-600 (4)
50-300
Cu
375 (42)
300 (34)
Rear
connectors
RT1 UBW2500
2)
2500
Copper
Metric
180 (20)
Table 2:
terminal types
Note: 1) Required and shipped with 2500 Amp frames.
