Mark Carver wrote in news:i7t68hF6atsU1
@mid.individual.net:

On 02/02/2021 14:28, Peter Able wrote:

2. The dangerous aspect of supply voltage variation is motor stalling.
Are they any 'insufficient voltage' breakers available to mitigate
against that problem ?

Undervoltage relay or Voltage Monitoring Relay seem to be the key phrases,
going rate about 40quid.

https://uk.farnell.com/c/switches-re...itoring-relays