PSI63C0.772-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI63C0.772-W1 is part of the PSI Frequency Inverters series and features a maximum output current of 800 Amps and a nominal system current of 110 Amps. This inverter uses water cooling, has a maximum cooling water flow of 4 liters per minute, and supports a maximum installation altitude of 2000 meters. It operates with a control supply voltage of 24 V DC and is rated at IP20 protection class.
Internal Product Review
The PSI63C0.772-W1 is a Bosch Rexroth Indramat frequency inverter with water cooling and 800 A maximum output current. IP20 protection and 55°C maximum ambient capability support dependable operation in demanding cabinet environments. An excellent inverter choice for high-current industrial applications.
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Product Description:
The PSI63C0.772-W1 is a frequency inverter produced by Bosch Rexroth Indramat within the PSI Frequency Inverters series. The unit converts incoming power into the regulated, high-current outputs required for resistance welding transformers, induction heating modules, and other automation loads that draw short, intense current pulses. By precisely controlling the output waveform, it allows machinery controllers to synchronize energy delivery with production cycles, improving process repeatability and component quality on the factory floor. This makes the inverter suitable for applications that depend on accurate, repeatable bursts of electrical energy rather than continuous motor control.
This inverter operates at a clock frequency of 1 kHz, giving the pulse pattern resolution needed for accurate current shaping. A control logic rail of 24 V DC powers the internal gate drivers and monitoring circuits. Under continuous duty, the power section carries a nominal system current of 110 A, while transient demands can rise to 800 A at the output terminals. When paired with a PSG 3100 welding transformer, the secondary circuit can reach 36 kA, so the power bars accept conductors up to 50 mm². Overall heat dissipation into the switchgear cabinet is limited to 110 W, supporting compact enclosure layouts. Reliable performance is maintained at installation altitudes up to 2000 m without derating.
Thermal management relies on water cooling, and the stainless manifold accepts an M16×1.5 (DIN EN 560) hose fitting for the required coolant connection. A flow of 4 l/min keeps semiconductor junctions below their design limits as long as the inlet temperature does not exceed 30 °C. The inverter can operate in ambient air up to 55 °C, and it may be stored between -25 °C and +70 °C without damage to seals or capacitors. Its ingress rating of IP20 indicates finger-safe live parts when mounted inside a cabinet. These limits apply to the available cabinet space and the coolant circuit during installation.
