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

Installation and Connection
Ground
(4xM8, 4xM5)
(c) Size E
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 B.2 for the recommended wiring and fuses and table B.5 for the
specifications of the power terminals.
NOTE!
The gauges values presented in tables B.1 and B.2 are for reference only.
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 tables B.1 and B.2 (consider extinction current value in cold situation
(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 tables B.1 and B.2.
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.
16 | CFW700
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.
- English -
2 t equal or lower the