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2
Description
2.1
Base Drive Panel Description
Series 6RA70 SIMOREG DC MASTER Base Drive Panels are complete drive assemblies ready to be
installed and operated. They include a 3-phase armature converter, single-phase field converter, main
contactor, protective semiconductor fuses, control power transformer, and power / control terminals.
Base Drive Panels are fully digital, compact units which supply the armature and field of variable-
speed DC drives with rated armature currents from 15A to 1680A. The motor field circuit can be
supplied with DC currents of up to 85A (current levels depend on the armature rated current).
2.2
General Information
Series 6RA70 SIMOREG DC MASTER converters are characterized by their compact, space-saving
construction. Their compact design makes them particularly easy to service and maintain since
individual components are readily accessible. The electronics box contains the basic electronic
circuitry as well as any supplementary option boards.
All SIMOREG DC MASTER units are equipped with a PMU simple operator panel mounted in the
converter door. The panel consists of a five-digit, seven-segment display, three LED's as status
indicators and three parameterization keys. The PMU also features connector X300 with an USS
interface in accordance with the RS232 or RS485 standard. The panel provides all the facilities for
making adjustments or settings and displaying measured values required to start-up the converter.
The OP1S optional converter operator panel can be mounted directly in the converter door or
externally, e.g., in the cubicle door. When mounted remotely, the OP1S can be connected to the
converter with cables up to 5 meters (15 feet) length. Cable up to 50 meter (164 feet) in length can be
used if a separate 5 VDC power supply is available. The OP1S connects to the SIMOREG through
connector X300 using the RS485 interface. The OP1S can be installed as an economic alternative to
conventional door mounted metering devices (i.e., voltmeters, ammeters, and speed indicator).
The OP1S features a liquid crystal display with 4 x 16 characters for displaying parameter names in
plain text. English, German, French, Spanish and Italian can be selected as the display languages. In
addition the OP1S can store parameter sets for easy downloading to other drives.
The converter can also be parameterized on a standard PC with appropriate software connected to the
serial interface on the basic unit. This PC interface is used during start-up, for maintenance during
shutdown and for diagnosis in operation. Furthermore, converter software upgrades can be loaded
through this interface for storage in flash memory.
On single-quadrant converters, a fully controlled three-phase bridge supplies the armature. On four-
quadrant converters, two fully controlled three-phase bridges are connected in an inverse-parallel
connection to allow both positive and negative armature current. For the field converter, a single-
phase, half-controlled 2-pulse bridge supplies the motor shunt field.
The armature and field converters can operate with AC line frequencies from 45 to 65 Hz. If required
for a specific application, the frequency of the armature and field AC supplies can be different. The
armature converter 3 phase AC supply is phase insensitive however on base drives rated 1180, 1660
and 1680 amperes, the 3 phase cooling fan must be connected to get the proper direction of rotation.
The power section cooling system is monitored by means of temperature sensors.
Siemens Energy & Automation
SIMOREG DC Master Base Drive Panel Operating Instructions
2-1
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