3.0 Operation; Inverter Mode; By-Pass Mode - Sensata Magnum Energy CSW3012-X Owner's Manual

3.0 Operation

3.0 Operation
The CSW3012-X inverter has two normal modes of operation; Inverter
mode, which powers your loads using the batteries, and By-Pass mode,
which transfers the incoming AC power (i.e., shorepower or a generator) to
power your loads.
3.1

Inverter Mode

In Invert mode, the inverter supplies AC power to your appliances by inverting
the DC power from the battery. The amount of time the inverter can provide
power is directly related to the capacity of the battery (or battery bank).
When the CSW3012-X is first connected to battery power, it is off. To turn
the inverter on, press and hold the Power button until a beep sound is heard
(about 1 second).
OFF – When the inverter is OFF, no power is used from the batteries to
power the AC loads, and the status LED will be OFF.
ON – When the inverter is turned ON, it operates either by "searching" or
"inverting", depending on the connected AC loads and the inverter PS setting
(see Table 3-2).
Info: The factory default setting for Inverter mode is PS1, which
turns the Search mode feature off.
Searching – The Search feature is provided to conserve battery power when
AC power is not required. If this feature is enabled, the inverter pulses the
AC output looking for an AC load (i.e., electrical appliance). Whenever an AC
load (greater than 10 watts) is turned on, the inverter recognizes the need
for power and automatically starts inverting. When there is no load (or less
than 3 watts) detected, the inverter automatically goes back into Search
mode to minimize energy consumption from the battery bank.
Inverting – When the inverter is on and not searching, the CSW3012-X uses
the DC power from the battery to supply 120 VAC power to your loads. The
amount of time the inverter can be inverting and providing power is directly
related to the amount of AC loads that are connected, and the capacity of
the battery bank.
3.2

By-Pass Mode

If AC power from an external source (utility or generator) is connected and
qualified on the inverter's AC input, the inverter will automatically go into
By-Pass (pass-through) mode and pass the incoming AC power through the
inverter to power your AC loads. If there is a power failure or the AC power
is disconnected, the inverter PS setting (see Table 3-2) determines how the
inverter will respond.
Info: The factory default setting for Inverter mode is PS1, which
enables the inverter to automatically transfer back to the Inverter
mode when the AC power is removed.
Transfer time – When the AC power fails or is disconnected, the relay
transfers from By-Pass mode to Invert mode in less than 30 milliseconds.
When switching from Invert mode to By-Pass mode, the inverter waits
approximately 20 seconds to ensure the grid is stable (or the generator is up
to speed) and then makes the transfer.
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