Product Description:

The KVR01.3-30/S380 is a supply unit manufactured by Bosch Rexroth Indramat within the KVR Power Supply Modules series. It rectifies three-phase AC and maintains the shared DC bus that energizes multiple servo drives, letting axis controllers draw operating power from a centralized source. By housing the required link capacitors, bleeder circuitry, and auxiliary logic rails, the unit simplifies cabinet wiring and consolidates protective functions for industrial automation lines that require coordinated motion and regulated regeneration.

This model delivers a continuous bus throughput of 30 kW, enough to feed several medium-frame drives simultaneously, while the auxiliary 24 V rail can supply control electronics with 11 A. An internal rectifier stabilizes the DC link at 320 V, and the capacitors can momentarily furnish up to 90 kW of peak link power during acceleration spikes. During steady operation, the power stage dissipates 170 W inside the housing, while an additional 480 W is transferred out of the cabinet through conductive surfaces, so airflow planning remains important. Two ±15 V taps rated at 2.0 A each support feedback transducers, and 500 VA is reserved for onboard logic. The connected drive system can use 24 kW of output power after typical conversion losses.

For deceleration events, the unit can absorb 20 kW of continuous regenerative power and store up to 100 kWs of energy in the link capacitors before the bleeder activates. The discrete resistor bank can momentarily convert surplus bus energy at a 40 kW peak, which helps prevent overvoltage trips when multiple axes brake at the same time. Forced-air cooling is provided by a 70 VA fan section, and the overall protection rating is IP10, so placement inside a closed control cabinet is required. Reliable service is specified up to an ambient temperature of 55 °C, and operation above that level requires derating to protect the semiconductors.