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Etrel Load Guard | User manual
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LOAD GUARD
Load Guard is a device that measures the current and voltage across
phases of a particular segment of the power grid, calculates power and
sends all data to the master station.
Power management of master charging station decides, based on
information provided by Load Guard, what target current to set on its
connector and other stations of the cluster. If necessary, it will increase
or decrease the charging power or even stop it completely to prevent the
fuses from switching off due to overcharging.
Load Guard allows charging with maximum current without overloading
the fuses.
Figure 3: LED lights of Load Guard
The Load Guard has three LEDs on the front plate labelled PWR, DATA and
PLC. When the Load Guard is connected to the power supply, the PWR
light should light up. If the connection between the Load Guard and the
charging station is established, the DATA light flashes. If a PLC connection
is established, the PLC light should light up.
Figure 4: Measuring current transformers set on all three phases
