PSI6300.737-L2 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI6300.737-L2 is a medium frequency inverter and part of the PSI Frequency Inverters series. It operates with a mains voltage range of 480 to 690 VAC and has a maximum primary current of 800 Amps. The device features air cooling, an 8-bit analog output resolution, and supports discrete I/O voltage of 24 VDC.
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Product Description:
The PSI6300.737-L2 medium-frequency inverter is manufactured by Bosch Rexroth Indramat within the PSI Frequency Inverters series. It converts a three-phase supply into a regulated medium-frequency output for induction heating, welding transformers, and other high-current loads used in automated production lines. By modulating current at kilohertz rates, it maintains stable energy delivery so that process parameters remain consistent across production cycles. This operating role makes it suitable for applications that depend on repeatable thermal input and closely controlled power delivery during each work cycle.
This model accepts a mains input range of 480 - 690 VAC and draws a nominal line current of 110 A, figures that guide feeder sizing and fuse selection. It chops energy at 1000 Hz, providing continuous medium-frequency power while keeping eddy-current losses acceptable. An 8-bit analog output, scaled against a serial full-scale code of 255, forwards process variables to external controllers. Air cooling removes up to 420 W of heat from the power section, so adequate airflow inside the switch cabinet is required. Logic interfaces operate with 24 VDC discrete I/O, the stop circuit tolerates 3 A at that voltage, contactor feedback is polled every 250 ms, and an automatic idle timeout trips after 60 s. Time-critical tasks are synchronized through an EtherNet timer channel, which helps the inverter coordinate switching events with the surrounding control system.
Primary inrush capability reaches 800 A, and the transformer-coupled secondary can deliver 36 kA to the work coil during each heating pulse. Line terminations accommodate conductors up to 50 mm², while at least 35 mm² must be used to satisfy thermal limits. The pressure feedback circuit inserts a 5 s delay to filter transient spikes before the controller reacts. Cabinet heat calculations must include 100 W of base loss and a possible 200 W peak when auxiliary boards are active. These values help determine cable selection, thermal management, and protective device sizing for stable inverter operation.
