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Siemens SIMOREG 6RA7093-4KS22

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6RA7093-4KS22

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The Siemens 6RA7093-4KS22 is a robust single-quadrant DC rectifier and converter from the SIMOREG series. Designed for high performance, it operates on a three-phase 690 V supply and is capable of handling substantial currents and voltages.

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Technical specifications for 6RA7093-4KS22

ManufacturerSiemens
Product TypeDC rectifier/converter (single-quadrant)
Product LineSIMOREG
Part Number6RA7093-4KS22
Operation Mode1-quadrant (B6C)
AC Supply3-phase, 690 V
AC Input Current1,244 A (approx.)
DC Link Voltage830 V DC (approx.)
DC Continuous Current1,500 A (approx.)
Approx. DC Power1.24 MW
Field Supply Ratings460 V AC to 375 V DC, 40 A
Power Stage Topology6-pulse thyristor bridge
Control SystemDigital closed-loop speed/current
CoolingForced-air (fans)
Line Frequency50 / 60 Hz
Ambient Limits0–40 °C (derate >40 °C)
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The Siemens model 6RA7093-4KS22 is a high-capacity DC rectifier and converter that functions in a single quadrant. This device is characterized by its significant dimensions, measuring approximately 1980 x 790 x 580 mm, and a weight of around 150 kg. It is designed to be powered by a three-phase AC supply at 690 volts. The unit can handle an input current of about 1,244 A.

The converter achieves a DC link voltage of approximately 830 V DC, delivering a continuous DC current of around 1,500 A. This setup translates to an approximate DC power capability of 1.24 megawatts, making it suitable for demanding industrial applications. The field supply ratings indicate compatibility with 460 V AC input, delivering 375 V DC at a current rating of 40 A.

A 6-pulse thyristor bridge topology is employed for enhanced efficiency and performance. The internal control system utilizes digital closed-loop speed and current management to ensure precise operation under varying loads. Cooling is facilitated through forced-air mechanisms using fans, which maintain operational integrity during extensive use.

This rectifier operates effectively at line frequencies of 50 or 60 Hz and is limited to ambient temperatures ranging from 0 to 40 °C. If the ambient temperature exceeds 40 °C, the unit must be derated to ensure consistent performance and longevity.