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PSI6300.333-W1 Bosch Rexroth Indramat

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The Bosch Rexroth Indramat PSI6300.333-W1 is a medium frequency inverter from the PSI Frequency Inverters series. It features a mains voltage range of 400 to 480 VAC and a maximum output current of 800 Amps. This water-cooled inverter has a cabinet loss of 110 Watts and a protection rating of IP20.

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Product Description:

The PSI6300.333-W1 inverter is manufactured by Bosch Rexroth Indramat for the PSI Frequency Inverters series. Acting as a medium-frequency converter, it turns factory three-phase power into regulated output that feeds induction heaters, melting furnaces, or high-frequency drives within automated lines. The unit fits inside electrical cabinets and is designed for integration with water-cooled bus bars and remote control electronics.

The mains input is rated for 400–480 VAC, so the inverter can be connected directly to common industrial supply networks without a step-up transformer. Its nominal system current of 110 A supports continuous operation, while a maximum output current of 800 A is available for short bursts during startup or process peaks. The internal power electronics switch at a carrier frequency of 1 kHz, which determines the resolution of the synthesized medium-frequency waveform and influences transformer design on the load side. Control electronics are powered by a dedicated 24 V DC supply that keeps the gating, diagnostics, and bus communication active even when the mains is de-energized. Cabinet dissipation is limited to 110 W, reducing the heat load on enclosure climate systems.

The liquid circuit removes up to 420 W of semiconductor heat. A flow rate of 4 L/min through the water-cooled heat sink maintains device temperature as long as the inlet remains below 30 °C. Hydraulic connections use an M16 × 1.5 fitting, and the power terminals accept wire lugs for conductors up to 50 mm², while the control terminals accept conductors up to 35 mm². The enclosure carries an IP20 protection rating and requires a minimum clearance of 100 mm above and below to provide airflow around auxiliary parts. Overvoltage events are suppressed by a metal-oxide varistor network. The power section operates as a three-phase medium-frequency inverter, and communication with a PLC is handled through the INTERBUS interface.

Cabinet Loss
110 W
Clock Frequency
1 kHz
Control Supply
24 V DC
Cooling Flow
4 l/min
Cooling Method
Water Cooled
Mains Voltage
400 - 480 VAC
Max Cooling Loss
420 W
Max Output Current
800 A
Max Terminal Size
50 mm²
Max Water Inlet Temp
30 °C
Min Installation Clearance
100 mm
Nominal System Current
110 A
Overvoltage Protection
MOV
Power Stage Type
3-Phase MF Inverter
Product Type
Medium Frequency Inverter
Protection Rating
IP20
Timer Type
INTERBUS
Water Connection
M16 x 1.5
Wire Range
35 mm²

Frequently Asked Questions about PSI6300.333-W1:

Q: What mains voltage range does the PSI6300.333-W1 frequency inverter support?

A: The PSI6300.333-W1 frequency inverter operates with a mains voltage range of 400 to 480 VAC.

Q: What cooling method does the PSI6300.333-W1 use?

A: This model is cooled using a water-cooled system, requiring a flow of 4 liters per minute.

Q: What is the maximum output current capacity of the PSI6300.333-W1 inverter?

A: The maximum output current for the PSI6300.333-W1 is 800 A, allowing for high-power applications.

Q: What type of overvoltage protection is provided in the PSI6300.333-W1?

A: The PSI6300.333-W1 offers overvoltage protection via MOV technology to help safeguard the internal circuitry.

Q: What is the protection rating of the PSI6300.333-W1 frequency inverter?

A: The inverter features an IP20 protection rating, which means it is protected against solid objects greater than 12.5 mm.


Internal Product Review

  • ‘‘The PSI6300.333-W1 is a medium frequency inverter configured as a 3-phase MF inverter for demanding industrial power conversion. Water-cooled construction with 4 l/min cooling flow supports dependable thermal control in continuous-duty service. IP20 protection and 800 A maximum output current make this unit an excellent fit for high-current inverter applications.’’

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