End of life
When the protector comes to the end of its working life it should
not leave equipment unprotected. Thus in-line protectors should
take the line out of commission, preventing subsequent transients
from damaging equipment. Protectors for data communication,
signal and telephone lines and protectors for low current mains
power supplies are usually in-line devices. Where protectors
are installed at mains power distribution boards it is usually
unacceptable for these to suddenly fail, cutting the power supply.
Consequently, to prevent equipment being left unprotected, the
protector should have a clear pre end-of-life warning, which
allows plenty of time for it to be replaced. |
