PSI6300.336-W1 Bosch Rexroth Indramat
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MPN: R911327095
The Bosch Rexroth Indramat PSI6300.336-W1 is a medium frequency inverter from the PSI Frequency Inverters series. It supports a mains voltage range of 400 to 480 VAC and delivers an output current of 800 Amps. This inverter uses water cooling with a flow rate of 4 liters per minute and offers IP20 protection.
Internal Product Review
The PSI6300.336-W1 is a medium frequency inverter with water-cooled thermal management and 800 A output current. Technical performance looks strong for high-demand welding systems, supported by a 400–480 VAC mains voltage range and INTERBUS timing integration. A 36 kA secondary current rating stands out as a key strength for consistent high-power operation.
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Product Description:
The PSI6300.336-W1 is a medium-frequency inverter produced by Bosch Rexroth Indramat for the PSI Frequency Inverters series. Installed in automated welding, brazing, or induction-heating cells, it converts factory mains power into a regulated medium-frequency output that can energize high-current secondary circuits. The unit combines a water-cooled power bridge with an INTERBUS timer, allowing process controllers to trigger precise energy windows that match motion cycles, temperature ramps, or material feed rates in repetitive manufacturing.
Incoming three-phase power at 400–480 VAC is rectified and inverted to the commanded medium frequency. During continuous operation, the inverter provides 800 A to the load. A switching rate of 1 kHz limits current ripple while controlling IGBT losses. The control electronics draw power from a separate 24 V DC rail. The enclosure has an IP20 rating and must be mounted inside a sealed panel. Installation requires 100 mm of vertical clearance for cable routing and airflow. The unit releases 110 W into the cabinet air, while the liquid circuit removes 420 W from the power section. MOV arresters provide overvoltage protection, the main terminals accept 50 mm² conductors, and auxiliary wiring can use 35 mm² conductors. The mains side draws 110 A RMS, with synchronization handled through the INTERBUS interface.
Cooling is provided by a water-cooled heat sink attached to the power modules. Facility water flows at 4 L/min and enters at 30 °C through M16 × 1.5 ports. Maintaining this flow allows operation at ambient temperatures up to 55 °C. The secondary-circuit current can peak at 36 kA during short welding pulses. The control system monitors coolant flow and system current and can adjust pulse timing through the INTERBUS timer to prevent thermal runaway. Hoses must remain clear of live busbars, and the power terminals must remain accessible for installation and maintenance.
