Phase Failure Relays

What is a Phase Failure Relay? A Phase Failure Relays is a type of control and monitoring relay designed to detect problems typically with a three phase supply but some can be used for single phase applications. The conditions which are monitored are Complete Phase Loss, Under Voltage, Over Voltage, Phase Sequence, Phase Asymmetry and Neutral Loss Phase Failure Relays …

UK Water Authorities Product Approval

It’s been a long time in the making with lots of phone calls and meetings but we have finally made progress in getting the UK Water Authorities to approve our products for use. Several weeks ago Malcolm, Murray and Steve were exhibiting at the Pump Centre Conference Exhibition 2017 where they met with many of our customers who work on the …

Phase Failure Relays: their design and good installation practice

Phase failure relays (PFRs) do occasionally fail, and the biggest enemy is heat – heat generated as a result of incorrect installation, harmonics and voltage spikes. The first thing to consider is what is expected from the PFR, and how good design and good installation practice can mitigate potential problems. Malcolm Greenhill of Charter Controls reports. How many electronic devices …