4C OPTION
OPERATION
The inverter power system’s 4C option allows lighting fixtures or other load types on
circuits controlled by local switching devices to be easily connected to and powered by
the VST system during utility power outages. The 4C option provides four local
switching device override circuits which, under emergency mode operating conditions,
automatically disconnect the load side of the local control device(s) and connect the
selected loads to the inverter output assuring normal operation of connected loads
regardless of local control device switch position operating status.
CONNECTIVITY
Any or all of the 4C option override circuits may be used to power lighting fixtures or
other loads, up to the maximum output capacity of the system. The outstanding features
of the SPS and LPS sy-stems provide additional connectivity and flexibility features to
the 4C option. The system’s universal output allows for the powering of 120VAC and/or
277VAC loads and because the system’s output is a clean, sinusoidal waveform, load
compatibility issues are never a problem. Additionally, provisions are provided so that
emergency loads can be configured for normally-on, normally-off, combinat
io
n
along
with switched operation.
