Product Description:

Bosch Rexroth Indramat manufactures the KVR01.3-30-3/S380, a power supply module in the KVR Power Supply Modules series. The unit converts three-phase mains energy into a regulated DC link that feeds multiple servo drives, and it also generates auxiliary low-voltage rails for control electronics and cooling hardware. By combining rectification, energy storage, and dynamic braking circuitry, the module stabilizes bus voltage, supports regenerative power flow back to the mains, and protects conveyor lines, metal-cutting centers, and packaging systems from overvoltage events during rapid deceleration cycles.

At the center of the module, the DC link is held at 320 VDC within a ±5% tolerance so inverter sections see a constant supply. The link circuit can furnish a continuous power of 30 kW to the drives, yet it supports a momentary peak of 90 kW for acceleration bursts. A dedicated bleeder resistor absorbs up to 40 kW to restrain voltage rise when the drives regenerate, and the capacitor bank can store as much as 100 kWs of returned energy before discharge. Separate auxiliary outputs deliver 11 A at +24 V and 2.0 A on each ±15 V rail for logic functions, with 500 VA set aside for electronics and 70 VA reserved for each heat sink-mounted fan.

For enclosure planning, the module dissipates 170 W inside the control cabinet, while its finned heat sinks radiate another 480 W to the outside environment, so airflow paths must accommodate both figures. Overall height is 390 mm, width is 215 mm, and depth is 355 mm, allowing installation on standard 300 mm rack rails. The housing weighs 31 kg, and each external fan adds 4.2 kg to the panel door or frame. Cabinet layout must account for the internal heat load and the heat released at the outer heat sink surfaces so nearby components are not exposed to concentrated hot air.