Power / Grounding Wiring And Fuses - WEG CFW700 Manual Del Usuario

Installation and Connection
(4xM8, 4xM5)
Figure 3.1 (c) (cont.): Power terminals and grounding points – sizes A to E

3.2.2 Power / Grounding Wiring and Fuses

ATTENTION!
Use proper cable lugs for the power and grounding connection cables.
Refer to tables B.1 and
specifications of the power terminals.
NOTE!
The gauges values presented in
Installation conditions and the maximum permitted voltage drop shall be
considered for the proper wiring sizing.
Input fuses
The fuses to be used at the input must be HS (High-Speed) type with I
„
value indicated in the
(it is not the fusion value)), to protect the inverter diode rectifiers and input wiring.
In order to meet UL requirements, use class J fuses at the inverter supply with a current not
„
higher than the values presented in
Optionally, slow blow fuses can be used at the input. They shall be sized for 1.2 x the rated
„
input current of the inverter. In this case, the installation is protected against short-circuit, but
not the inverter input rectifier. This may result in major damage to the inverter in the event of
an internal component failure.
10 | CFW700
Ground
(c) Size E
B.2 for the recommended wiring and fuses and
tables B.1 and B.2 (consider extinction current value in cold situation
tables B.1
R/L1, S/L2, T/L3: AC power supply.
U/T1, V/T2, W/T3: motor connection.
DC+: this is the positive potential terminal in
the DC bus circuit.
BR: braking resistor connection.
DC-: this is the negative potential terminal in
the DC bus circuit.
tables B.1 and B.2 are for reference only.
and B.2.
table B.4 for the
t equal or lower the
2