General
The BW.../BW...-T braking resistors are adapted to the technical characteristics of the inverter.
Braking resistors with different continuous and peak braking powers are available.
The braking resistors can be protected against overload and overtemperature by the customer when a thermal overload relay is used. The tripping current is set to the value IF; see the following tables.
The braking resistors of the BW...-T series are equipped with an integrated temperature switch that monitors the temperature. If the nominal operating temperature is exceeded, the temperature switch triggers a signal contact. The temperature switch does not switch off the braking resistor. This is why the temperature switch must be evaluated to avoid thermal overload of the braking resistor.
The BW012-002 braking resistor protects itself against a thermal overload with the help of an overload protection mechanism (non-replaceable fuses).
If the supply and regenerative module is operated on a grid with a line voltage of 500 V, a braking resistor of type BW012-002 must be used.
At lower line voltages, a braking resistor is only necessary if the regenerative function is inhibited, but regenerative energy is to be dissipated, e.g. if power is supplied by a generator.
INFORMATION
Using protection devices
Use only the protection devices listed in the following section:
- Internal temperature switch -T
- External bimetallic relay
- See also chapter "Protection of the braking resistor against thermal overload".
