Technical FAQs

Ask a Question

Who provides support for Class 8801 Type PF Ramsey products?

The 8801 PF (i.e., Pump and Fan) drives were rated from 25 to 500hp at 460vac for variable torque applications.

They used SCRs on both the converter and inverter section producing a six step voltage waveform on the output. Additionally, they were not designed with regenerative breaking but could produce 150% overload.

These devices were obsoleted in the late 1980s and there is no support for them. Users may be able to replace these devices using a standard variable torque drive.

CTA-ID : 2005677
Was this helpful?
What can we do to improve the information ?