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Siemens SIMOREG 6RA7088-6LS22

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6RA7088-6LS22

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The Siemens 6RA7088-6LS22 is a DC-Master rectifier that utilizes a six-pulse bridge topology. It is designed to handle an AC supply of approximately 830 V at a current of around 746 A and converts this to a DC output voltage of about 1000 V, with a continuous DC power capacity of approximately 900 kW.

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Technical specifications for 6RA7088-6LS22

ManufacturerSiemens
Product TypeDC-Master Rectifier
Product LineSIMOREG
Part Number6RA7088-6LS22
TopologyB6C (six-pulse bridge)
AC Supply~830 V, 3φ
AC Input Current~746 A
DC Output Voltage≈1000 V DC
DC Output Current≈900 A
Continuous DC Power≈900 kW
Alternate/Regional RatingUS: 1000 V DC, ~632 A
Field Input Voltage≈460 V AC
Field Output≈375 V DC, ≤30 A
Field CapabilityControllable Field Rectifier
CoolingForced-air (fan)
Power SemiconductorsThyristors
Control & InterfacesLocal panel; serial/fieldbus
Frequency50/60 Hz (45–65 Hz)
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Part number 6RA7088-6LS22, belonging to the Siemens SIMOREG series, is a DC-Master rectifier designed for robust industrial applications. The rectifier operates with an impressive input of ~830 volts AC derived from a three-phase supply, drawing an input current of approximately 746 A. Its DC output measures around 1000 V while it can deliver a significant output current of about 900 A, capable of sustaining continuous DC power around 900 kW, making it suitable for demanding operations. In the US market, this unit is rated for 1000 V DC at around 632 A.

The unit is equipped with a field input voltage of about 460 V AC, while it produces an output of approximately 375 V DC with a current limitation of 30 A. The controllable field rectifier provides enhanced flexibility for various applications. Effective temperature regulation is achieved through forced-air cooling, employing a fan to maintain optimal thermal conditions.

The power semiconductor technology used in this rectifier comprises thyristors, known for their durability and effectiveness in high-power applications. Users can access the control and monitoring interfaces via the local panel, in addition to serial and fieldbus connections. The operational frequency spans 50/60 Hz, with allowances for a range from 45 to 65 Hz, ensuring adaptability in various electrical environments.