Description 02.00
3-2 Siemens AG 6RX1700-0AD76
SIMOREG DC Master Operating Instructions
3.2.1 Special features of devices with 460V rated connection voltage
• This device series is available with rated direct currents of 30A to 1200A.
• Devices with rated direct currents of 450A to 1200A are equipped with a 1-phase fan.
• On devices with rated direct currents of 60A to 850A, the power terminals are located on the
underside and on the top of the device.
3.3 Mode of operation
All open-loop and closed-loop drive control and communication functions are performed by two
powerful microprocessors. Drive control functions are implemented in the software as program
modules which can be "wired up" by parameters.
The rated DC currents (continuous DC currents), load class Ι, specified on the rated plate can be
exceeded by 180%, the permissible overload during being dependent on individual converters. The
microprocessor calculates the current I
2
t value of the power section cyclically to ensure that the
thyristors are not damaged in overload operation.
A selection table for overload operation can be found in Section 9 ”Description of functions".
Converters self-adapt to the frequency of the available supply voltage in the range from 45 to 65 Hz
(armature and field are independent)
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