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Siemens SIMOREG 6RA7087-6DS22

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6RA7087-6DS22

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The Siemens 6RA7087-6DS22 is a microprocessor-controlled, single-quadrant rectifier designed to efficiently convert AC to DC power. This model employs a 6-pulse bridge topology, which handles a three-phase, 400-volt input supply.

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Technical specifications for 6RA7087-6DS22

ManufacturerSiemens
Product TypeMicroprocessor DC single-quadrant rectifier
Product LineSIMOREG
Part Number6RA7087-6DS22
Topology6-pulse bridge
AC Supply3-phase, 400 V
AC Input Current≈705 A
Armature DC Voltage≈485 V DC
Armature DC Current≈850 A
Alternate Rating485 V DC @ ≈620 A (US)
Field Input400 V AC
Field (Excitation) Output≈325 V DC, 30 A
Mains Frequency45–65 Hz
CoolingForced-air (cabinet)
Nominal Armature Power≈412 kW (calculated)
Mounting / FormChassis / base-drive, cabinet mount
ControlEmbedded microprocessor control
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The 6RA7087-6DS22 is a microprocessor-controlled DC single-quadrant rectifier developed by Siemens as part of the SIMOREG series. This device is engineered with a 6-pulse bridge topology for improved power efficiency. It operates on a three-phase AC supply rated at 400 V, drawing an input current of about 705 A.

In terms of output, the rectifier provides approximately 485 V DC as armature voltage, capable of supplying around 850 A in current. For specific applications requiring higher output, it also has an alternate rating of 485 V DC at roughly 620 A. The field input operates at 400 V AC, with the system generating a field (excitation) output around 325 V DC at 30 A. This flexibility ensures adaptability to various operational needs.

The mains frequency supported ranges between 45 Hz and 65 Hz, accommodating different electrical standards. Effective cooling is achieved through forced-air ventilation, which is crucial for maintaining operational stability within cabinet environments.

Its nominal armature power calculation indicates approximately 412 kW, affirming its capability for demanding industrial applications. The 6RA7087-6DS22 is designed for chassis or base-drive mounting, making it suitable for cabinet installations. Its control system leverages embedded microprocessor technology, enhancing operational precision and responsiveness.