General Description
The Regenerative Power Module (RPM) is a universal brake chopper circuit designed to dissipate regenerative energy produced by a motor into a fixed resistor load. The universal module covers the DC supply voltage range from 200V to 660V. The voltage selector link located on the outside front cover of the unit configures the module for LOW voltage (200V to 300V), MED voltage (300V to 500V) or HIGH voltage (500V to 660V).
The module is powered from the DC bus and requires no additional power supplies. The module can either be connected behind the M contactor of each drive or can be connected to the incoming DC bus using a separate mounted controller that includes additional protective components and line capacitance.
This module is required whenever the main power supply cannot receive the regenerated power being return to the line. The voltage on the OmniPulse DDC bus rises rapidly during regeneration (100 ms). Bus feed rectifier units that do not have a dump circuit or have slow reacting circuits require the use of the RPM module and dump resistor.
RPM Features
Ratings
Input Voltage Range | Minimum 200VDC |
| Maximum 660 VDC |
Brake Level Adjustment Range | Minimum 256 VDC |
| Maximum 800 VDC |
Rated Amps | 400A |
Peak Brake Current | 800A |
Duty Cycle (800A peak) | 10% (40° C ambient) |
| 5% (60° C ambient) |
Minimum connected dump resistor | 1 ohm |
Maximum Operating Temperature | 60° C |
Minimum Operating Temperature |
Universal Module (Voltage selector link, located on the front of the unit, configures module to DC Bus voltage)
Link Setting | DC Bus Range |
330 V (Low) | 200 – 300 VDC |
495 V (Medium) | 300 – 500 VDC |
660 V (High) | 500 – 660 VDC |
Regenerative Power Module - September 2010
Page 5 of 20