It Networks; Dynamic Braking - WEG MW500 User Manual

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
R
S
T
Control power
supply
(*) The effective braking current can be calculated as follows:
Contactor
Thermal
relay
Thermostat
Figure 3.2: Installation of brake resistor
- English -
Installation and Connection
R
S
T
BR
Brake
resistor
DC+
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