Product Description:

The PSI63C0.133-W2 is a medium-frequency inverter manufactured by Bosch Rexroth Indramat for the PSI Frequency Inverters series. The device converts three-phase mains energy into regulated medium-frequency output so it can power equipment that requires controlled frequency and current in industrial automation. It is suited for installations where stable power conversion is needed to support repeatable process performance during varying load conditions.

It operates from a mains window of 480 – 690 VAC, allowing connection to high-voltage plant networks. Internally, its IGBT bridge switches at a 1 kHz clock frequency, a rate that balances dynamic response with manageable switching losses. Logic and auxiliary circuits are powered through a 24 V DC control supply, separating low-voltage electronics from the power section. Under rated conditions, the inverter can deliver a maximum output current of 800 A, while the nominal system current remains 110 A for continuous service. A metal-oxide varistor network provides MOV overvoltage suppression, and the housing has an IP20 protection rating, indicating finger-safe but unsealed construction. Temperature monitoring is integrated and triggers protective shutdown if internal limits are exceeded.

The power stage is water-cooled, and a flow rate of 4 l/min is required to carry away up to 500 W of cooling loss while keeping the inlet temperature below 30 °C. This thermal arrangement lets the inverter sustain ambient conditions up to 55 °C and installation altitudes to 2000 m without derating. Secondary current capability reaches 36 kA, supplying short, high-energy pulses to matching transformers or work coils. The unit weighs 26 kg, accepts conductors up to 35 mm², and uses a 24 V timer circuit for coordinated start or stop sequences. Water temperature, flow, and internal heat sinks are supervised by integrated sensors, allowing protective functions to respond when cooling conditions move outside the permitted range.