西门子华南地区代理商

Braking resistor for PM240‑2 Power Modules, frame size FSD

Excess energy in the DC link is dissipated in the braking resistor. The braking resistors are intended for use with PM240‑2 Power Modules which feature an integrated braking chopper, but cannot regenerate energy to the supply system. For regenerative operation, e.g. the braking of a rotating mass with high moment of inertia, a braking resistor must be connected to convert the resulting energy into heat.

The braking resistors can be installed laterally next to the PM240‑2 Power Modules. The braking resistors for the Power Modules, frame sizes FSD to FSF, should be placed outside the control cabinet or outside the switchgear room so that the heat is dissipated away from the Power Modules. The level of air conditioning required is therefore reduced.

Every braking resistor has a temperature switch (UL-listed). The temperature switch should be evaluated to prevent consequential damage if the braking resistor overheats.

Note:

Shield connection kits are available for EMC-compliant installation of Power Modules.

A shield connection kit is supplied as standard with PM240‑2 Power Modules in frame sizes FSA to FSC. A set of shield plates is included in the scope of delivery for the motor and ** cables corresponding to the frame size for the frame sizes FSD to FSF. For the electromagnetically compatible connection of an optionally connectable braking resistor, the corresponding shield connection kit is to be ordered for frame sizes FSD to FSF.

For more information, see Shield connection kits for Power Modules in the section Supplementary system components.

Braking resistors that are optionally available depending on the Power Module used

S = Lateral mounting