MGE UPS Systems S3 - Manual (Page 23)

A circuit breaker is located on the front panel and identified
as "DC INPUT". Turning the breaker to the ON position will
apply the input D.C. voltage to a capacitor bank through a
resistor network to limit the inrush current.
After a few
seconds of delay, the DC capacitor bank voltage will be
within a few volts of the input. Then a relay will close and
apply the full battery voltage to the capacitor bank.
After
energizing of the relay, the Inverter will be allowed to operate.
Placing the circuit breaker to the OFF position will disable the
Inverter. If the BYPASS option is available, the unit will
transfer to BYPASS, thus the load will be powered from the
Utility power source through the BYPASS switches.
The
receiver cabinet contains a maintenance bypass relay to
allow the inverter module to be removed without removing
power from the load provided the BYPASS option is
available.
This is a three position rocker switch and is associated with
the digital LCD. The center position is OFF.
Pushing the
UPPER switch will allow scrolling through the various LINE 1
read-outs.
Pushing the LOWER switch allows scrolling
through various LINE 2 read-outs in the reverse direction.
When looking at the left hand side of the inverter module,
openings are provided to select the output voltage (120 or
240 VAC) and switches to set up various commands to the
microprocessor. See Figure 1-3A and Figure 1-3B.
1.6.5 Inverter Module
Switches and
Controls
1.6.4.2 Scroll Switch
1.6.4.1 Input DC Circuit
Breaker
86-153061-00 1 — 11 Introduction
Owner’s Manual