A local manufacturing plant is fed with our power supply. There is a second supply from a seperate source (100amp, 120/240 single phase) that feeds a breaker panel which in turn feeds light fixtures situated thru-out the plant. Under normal conditions, all of these lights are non-energized. When our power supply is lost, a lighting contactor pulls in, and these circuits are energized. This is supposed to allow personal to move around in the plant, and exit if desired.
We want to remove this 2nd power supply (from another supplier), and instead feed this panel using another means, such as a ups, or some such thing. Of course this ups will not be used except when normal power is lost.
The actual load is under 50amps.
Anybody have any ideas on a vender who has just a battery backup, much like a ups, but without the power conditioning etc. that a ups provides.
Thanks in advance