Product Description:

The PSI65C0.733-W1 medium-frequency inverter is manufactured by Bosch Rexroth Indramat within the PSI Frequency Inverters series. It serves as the power stage in industrial automation cells that require controlled medium-frequency energy, such as induction heating stations or surface-treatment baths. The unit modulates incoming AC power through an integrated converter. Its logic section maintains waveform quality while coordinating start, stop, and ramp functions with plant controllers.

The power section accepts a three-phase supply of 400 to 480 VAC and switches it at a carrier rate of 1 kHz to create a stable medium-frequency output. The maximum output current is 2400 A, while an MOV network provides overvoltage suppression on the DC link. Water is the designated cooling medium, and the heat exchanger requires a flow rate of 10 L/min. The cabinet provides a protection level of IP20 when installed in a closed electrical room. Thermal data indicate 100 W of basic cabinet loss and up to 4400 W of heat from the liquid-cooled heat sink under full demand. The control electronics operate from a 24 V DC logic rail, and timing commands are distributed over the internal Ethernet timer channel.

The nominal system current is rated at 660 A, representing the continuous operating load on bus bars secured with M10 terminal bolts. Maximum enclosure heat dissipation is limited to 850 W, allowing the unit to be installed in cabinets that share forced-air plenums with other drives. Water must enter the heat exchanger below 30 °C, because higher inlet temperatures reduce its heat-removal capacity. The maximum conductor cross section at the power studs is 120 mm², and the matching water manifold uses an M16 × 1.5 thread. The inverter tolerates ambient temperatures up to 45 °C and withstands up to 120 kA on the secondary side during fault clearing.