Product Description:

Bosch Rexroth Indramat manufactures the KDV 3.1-100-220-300-W1-220 module for the KDV Supply Modules series. This supply unit rectifies three-phase AC, forms a common DC bus, and dissipates regenerated energy, making it a link between plant power and multiple servo drives in automated equipment that uses a shared DC bus. It also furnishes a constant 24 V rail so PLC I/O, encoder logic, and control electronics remain powered even when the main drives are idle.

The module uses a nominal supply of 3 × 220 V AC at line frequency. Under continuous operation, it can draw a line current of 100 A, which is the maximum permissible load on the upstream branch circuit. Internally, that energy is rectified to a DC link held at 300 V DC, which connected drives use for torque production and braking. A separate auxiliary winding provides 500 VA, so sensors, contactors, or embedded controllers can run without an extra transformer. For brief acceleration peaks, the bus can accept a surge of 160 A for 300 ms, allowing servos to start heavy loads without undervoltage trips. The module also supports 11.5 A of continuous 24 V current for fieldbus couplers and safety relays.

During recovery events, the supply can feed up to 48 kW back toward the mains, while a dedicated bleeder circuit can absorb 40 kW when line conditions prevent export. The housing releases 150 W of internal loss plus 500 W that the heat sink must carry away, so forced-air cooling is required. An IP10 protection rating restricts installation to enclosed panels inside the cabinet, and the integral fan runs from a 220 V AC source drawing 1 000 VA. Safe operation is specified up to 55 °C, and current derating applies above that temperature. The DC bus can accept 100 kWs of returned energy per event before the regenerative handling circuit intervenes.