Product Description:

Bosch Rexroth Indramat designates the PSI6300.641-L1 as a medium-frequency inverter within the PSI Frequency Inverters series. The unit converts fixed mains power into a variable medium-frequency output so induction heating coils, forging presses, or specialized test benches can regulate energy precisely during production cycles. DeviceNet timing coordinates gating with external controllers so process sequences can stay synchronized during operation.

The inverter accepts a three-phase line of 400 – 480 VAC, letting it tie directly into standard factory networks without an upstream transformer. During continuous duty it carries 110 A, while transient demands can rise to 800 A for short acceleration or load peaks. A pulse-width-modulated bridge operates at a 1 kHz clock frequency, balancing switching losses with output waveform quality. Internal logic and pilot relays draw from a separate 24 V DC control supply, keeping command circuits alive when the power stage is isolated. Air-cooled construction removes the 69 W of basic cabinet loss, and the stated cooling loss guides the sizing of forced-ventilation hardware. Cables land on terminals up to 50 mm², and conductors in the 35 mm² wire range exit through glands that require 100 mm of top or bottom clearance.

An enclosure rating of IP20 means the unit must be mounted inside a closed cabinet to avoid contact with live parts, yet it tolerates ambient temperatures up to 55 °C when cabinet airflow meets the required design values. Adding a fan cowl lowers the allowable ambient temperature to 45 °C. The cooling circuit must carry away the declared 360 W so semiconductor junctions stay within limits when secondary current surges approach 36 kA. Surge events generated by back-EMF or grid spikes are diverted by the integrated MOV network, preventing overvoltage damage to the IGBT stack and its driver electronics.