centered at 25 °C. For higher temperatures, float voltages go down. For lower
temperatures, float voltages go up.
7.3 Inverter Mode
Inverter Mode can have several other names such as Emergency Power and Battery
Power Mode. This terminology may be used throughout this document.
During Inverter Mode, the inverter is producing a pure sine wave for the output loads
and the batteries are being discharged. The output current is limited by an active pulse
by pulse current limit technique and prevents the inverter from failure.
In the event of an overload there are several ways that the inverter will protect itself.
First is the pulse-by-pulse limit and second is by average sensing. The pulse-by-pulse is a
transient protection and occurs in the micro-second time scale, the average sensing
looks at a heavily filtered signal and occurs in the seconds time scale.
Due to the high crest factor on the E3-MAC Series, loads that have high inrush
currents are quickly up and running. This is very beneficial with Switched or Normally-
Off loads. The Normally-On and multipurpose Normally-Off/Switched outputs all
produce voltage during Inverter Power mode.
7.4 Normally-On Output
There is one Normally-On Output located on the terminal block and is labeled N-ON.
The Normally-On Output is energized 24/7 as long as the system is powered on.
7.5 Normally-Off/ Switched Output
Normally-Off outputs are energized only during an Emergency condition or when the
system test button is pressed.
Switched outputs are controlled by applying an AC voltage to the Switched Command.
These output types function as an interface to energy saving controls such as time
clocks, daylight harvesting, photo-sensors, occupation sensing or lighting control
systems.
NOTE - When the E3-MAC Series changes mode of operation from Charge Mode to the
Inverter Mode, ALL output types will automatically energize regardless of the state of
the Switched Command Input.
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