Drives
PowerFlex Common Bus
PowerFlex® 20S Bus Supply for Common DC Bus Applications
The PowerFlex SCR Bus Supply is a non-regenerative DC bus supply used to supply power to a line-up of AC drives with common DC bus input. The supply converts incoming three-phase AC line voltage to a common DC bus voltage.
Bulletin 20S SCR Bus Supply offers the following features:
- Six-pulse, full-wave, three-phase SCR bridge rectifier unit.
- Stand alone and master-slave configurations (1,000 A units only). A maximum of five units (1 master and 4 slave units) may be connected in parallel.
- Built-in AC line and DC bus fuses (400 & 600 A units). Rectifier branch fuses, snubber circuit and DC bus feedback fuses (1,000 A units). All fuses feature trip indicator switches.
- Over temperature sensor located in the heat sink for thermal protection of the SCR bridge rectifier.
- RC snubber circuit for dampening and linearity of over voltages.
Ideal for the following applications:
- Paper Making Machines, Finishing Winders, Calendars, and Rereelers
- Metal Rolling Mills, and Slitters
- Winders, Coaters, and Calendars
- Cranes