OMEGA III efi - No battery required for the LV version.
The Omega is an Earth Fault relay with a dual indicator - RED LED & FLAG that can be operated from from a Bowden Band C/T or a conventional cast resin core balance C/T. It has user settable trip current, and trip duration settings, as well as a reset time range of between 3 and 12 hours. It can be powered by a replaceable long life Lithium battery giving a 15 year average life under normal operating conditions or it can a be powered from the incoming LV mains, in which case the option for LV supply reset is available. The indicator is driven by high capacity super caps whilst the LV supply is absent. This means that no batteries are required with the LV unit. The OMEGA III efi has a high intensity RED LED indicator as well as a BLACK/RED FLAG DISC and the facility for a remote LED indicator external to the substation. It has two alarm output relays with either latching or fleeting function. OMEGA III may also be powered and reset from an RTU supply.
It also has manual controls for TEST & RESET.
OMEGA II efi – as per Omega apart from: