PSI6300.133-W1 Bosch Rexroth Indramat
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The PSI6300.133-W1 is a medium frequency inverter manufactured by Bosch Rexroth Indramat and is part of the PSI Frequency Inverters series. It has a max output current of 800 Amps, operates with a clock frequency of 1 kHz, and supports a mains voltage of 400 to 480 VAC. The inverter uses water cooling, with a recommended cooling water flow of 4 liters per minute and max water inlet temperature of 30 degrees Celsius.
Internal Product Review
The PSI6300.133-W1 is a Bosch Rexroth Indramat medium frequency inverter designed for reliable conversion on 400 to 480 VAC mains. Water-cooled construction and a 4 l/min cooling water flow support efficient thermal management during demanding duty cycles. A maximum output current of 800 A gives the unit excellent headroom for heavy industrial service.
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Product Description:
The PSI6300.133-W1 is a medium-frequency inverter produced by Bosch Rexroth Indramat within the PSI Frequency Inverters series. It converts three-phase mains energy into a regulated medium-frequency output for induction heating, forging, or similar industrial automation tasks that require tight current control. The unit integrates into cabinets that use water as the primary heat transfer medium and relies on external or internal 24 V DC logic power so it can remain operative during machine standby.
The inverter operates on a three-phase supply of 400 – 480 VAC and modulates its output with a drive clock of 1 kHz, which influences the spectral content of the secondary current. Under continuous duty it supports a nominal system load of 110 A, while short-term peaks can reach 800 A to accommodate rapid thermal ramps. Cabinet dissipation is limited to 69 W, so most generated heat is removed by the internal heat exchanger rather than the control enclosure. Reliable operation is maintained up to 55 °C ambient temperature, assisted by a serial communication link that reports transformer temperature, secondary current feedback, and the status of the external proportional valve that governs coolant pressure. Logic and timing functions share the same 24 V source used by the internal timer module, and all measurements are synchronized through secondary current feedback to keep the 36 kA maximum secondary loop within safe limits.
A water-cooled heat sink circulates coolant at 4 l/min through M16×1.5 threaded ports, and inlet water must not exceed 30 °C to protect the transformer winding varnish. The housing carries an IP20 rating, indicating finger protection and the need for installation inside a closed electrical cabinet. This arrangement supports enclosed cabinet mounting while the coolant circuit removes heat from the power section.
