WEG MW500 User Manual - page 17
MW500 | 11
Installation and Connection
- English -
Power supply capacity
The MW500 is suitable for use in a circuit capable of delivering not more than 30.000 Arms
symmetrically (380 V - 480 V).
In case the MW500 is installed in power supplies with current capacity over 30.000 Arms,
it is necessary to use proper protection circuits for those power supplies, such as
fuses or circuit breakers.
3.2.3.2 IT Networks
ATTENTION!
When drives with internal RFI filter is used in IT networks (neutral conductor
not grounded or grounded through a high ohmic value resistor), remove
grounding screw XE1, since those kinds of network cause damage to
the filter capacitors of the drive.
3.2.3.3 Dynamic Braking
Refer to
table B.1
for the following specifications of the dynamic braking: maximum
current, recommended resistance, effective current
(*) and cable gauge.
Input Power
supply
Thermostat
Brake
resistor
Thermal
relay
R
S
T
Control power
supply
Contactor
BR
DC+
R
S
T
Figure 3.2: Installation of brake resistor
(*) The effective braking current can be calculated as follows: