PSI63C0.734-L1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI63C0.734-L1 is a medium frequency inverter from the PSI Frequency Inverters series. It operates with a mains voltage of 400 to 480 VAC and supports a maximum output current of 800 Amps. The unit features air cooling, IP20 protection, and a clock frequency of 1 kHz.
Internal Product Review
The PSI63C0.734-L1 is a well-engineered medium frequency inverter with air-cooled operation and IP20 protection. Support for 400 to 480 VAC mains voltage and 800 A maximum output current gives the unit strong drive capability for demanding power conversion duties. Recessed mounting and a 24 VDC control supply simplify panel integration, making the inverter a highly capable choice for industrial systems.
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Product Description:
The PSI63C0.734-L1 is a medium-frequency inverter manufactured by Bosch Rexroth Indramat for the PSI Frequency Inverters series. In induction-heating and similar automation tasks, it converts three-phase utility power into a controlled medium-frequency output that drives resonant loads or transformer-coupled work coils. The unit integrates a 24 VDC control supply so the drive electronics remain energized during line disturbances. An internal 24 VDC, 2 A auxiliary source powers sensors or contactors inside the same cabinet.
This inverter accepts a three-phase input of 400–480 VAC at a frequency of 50/60 Hz. Its switching stage operates at a clock frequency of 1 kHz, allowing stable current regulation while limiting electromagnetic noise. The housing has a protection rating of IP20, making it suitable for clean, enclosed panels that accommodate its recessed mounting style. Conductors up to 35 mm² may be connected to the terminals, and the feeder lugs support a maximum conductor cross-section of 50 mm². The main bus can continuously deliver 110 A and provide a peak current of 800 A during short load surges. The medium-frequency secondary can reach 36 kA when coupled through the matching transformer. MOV surge arresters provide overvoltage protection, and an Ethernet timer interface coordinates operating times with supervisory controllers.
The inverter is air-cooled, and cabinet heat dissipation is 69 W during standby. Dissipation increases to 170 W under rated power, with additional inverter cooling losses of 360 W. Operation is permitted at ambient temperatures from +10 °C to 55 °C, while storage temperatures may range from -25 °C to +70 °C. The 3K3 climatic category under EN 60721-3-3 indicates suitability for production areas with moderate humidity and dust. The unit has an approximate mass of 20 kg. Its recessed installation geometry keeps the wiring within the enclosure, while the MOV devices protect internal circuits from voltage surges.
