PSI63C0.224-L1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI63C0.224-L1 is a medium frequency inverter from the PSI Frequency Inverters series. It has a maximum output current of 800 Amps, a nominal system current of 110 Amps, and operates with a control supply of 24 V DC. The PSI63C0.224-L1 features air cooling, IP20 protection, and can handle ambient temperatures up to 55°C.
Internal Product Review
The PSI63C0.224-L1 is a medium frequency inverter with a 400 to 480 VAC mains voltage range. Air-cooled construction and IP20 protection support dependable integration in industrial cabinets. A maximum output current of 800 A gives this Bosch Rexroth Indramat unit especially strong appeal for demanding power conversion applications.
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Product Description:
The PSI63C0.224-L1 is a medium-frequency inverter built by Bosch Rexroth Indramat and supplied within the PSI Frequency Inverters series. Used in automated welding and induction heating stations, the unit converts the plant’s three-phase mains supply into a controllable medium-frequency output that drives high-current transformers or resonant loads. By regulating frequency and current, it lets production cells adjust energy transfer without mechanical tap-changing.
The inverter operates from a three-phase input of 400 – 480 VAC, and the internal power stage clocks at 1 kHz, so the output waveform can be modulated with 1-millisecond resolution. A control logic rail of 24 V DC powers the gating circuits and PROFIBUS interface, while the power section can deliver up to 800 A of continuous output current for the connected secondary circuit. The housing carries an IP20 protection rating, meaning basic finger-safe shielding inside a closed cabinet but no water sealing. Overvoltage transients at the input are suppressed by an integrated metal-oxide varistor network, and the air-cooled heat sink is optimized for recessed mounting so cabinet airflow can remove switching losses.
During steady production, the inverter’s nominal system current is 110 A, yet the design allows short bursts up to 36 kA on the transformer secondary to achieve rapid energy deposition in the workpiece. Safe operation is maintained up to an ambient temperature of 55 °C; beyond this point, derating is required to protect the silicon. Thermal losses are limited to 360 W, a value that sets cabinet ventilation demand and helps prevent hot spots around neighboring drives. Field wiring is accommodated by screw terminals that accept conductors up to 50 mm², with a recommended lead size of 35 mm². The total mass is 20 kg, and the built-in PROFIBUS timer coordinates firing angles with the cell controller so multiple inverters share a synchronized frequency profile.
