Power Connections - WEG CFW700 Serie Manual Del Usuario

Input fuses
The fuses to be used at the input must be HS (High-Speed) type with I
„
value indicated in the
page 220 (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
Table B.3 on page 220.
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.

3.2.3 Power Connections

PE
R
S
T
Power
Disconnect
supply
switch
The switch-disconnector is not necessary if the inverter has the DS optional item (with
„
switch-disconnector).
Table B.1 on page 218,
Table B.1 on page
PE R S T U V W PE
Fuses
Figure 3.2: Power and grounding connections
Installation and Connection
2
Table B.2 on page 219
218, Table B.2 on page 219
Shielding
t equal or lower the
and Table B.3 on
and
PE W V U
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