The SmartEMS- 50Amp
senses that the coach is connected to a 50Amp source by measuring the
line to line voltage. This is normally 240 volts. When the coach is
plugged into 50Ampservice the system "goes to sleep". If the
coach is "dog-boned down" to connect to a smaller service, the line to
line voltage will be zero. When it senses the smaller service, it
automatically takes control of loads. These are typically those whose
function can be postponed until there is enough power available to
operate them.
When the shore cord is first plugged in to a smaller service, SmartEMS- 50Amp turns on power to
the controlled loads, in order, as long as the total current doesn’t
exceed 30Amps. This happens within seconds, so it is transparent to the
owner. If the total current exceeds 30 Amps, the SmartEMS- 50Amp senses this
over-load and turns off the next controlled load in order. The system
notes the amount of current “decrease” and puts that amount in memory
as the amount of current that appliance was drawing. The system
continues to monitor the total current and when it drops to a level
that is the amount of the controlled load, it will turn that load back
on. At least two minutes must have passed before power will be
re-applied.
In this way, the actual current of the specific appliance operating at
that particular line voltage, temperature, and load will be learned and
used by the system. This current will be “re-learned” each time the
controlled load is turned off. This assures that the system will
operate the appliances when the exact amount of power is available and
will not unnecessarily cycle the appliances. Areceptacle can also be
one of the controlled loads, and SmartEMS-
50Amp will learn what the owner plugs in.
An optional monitor panel is available that offers a digital display of
the total current being drawn and status indication of which appliances
have power applied to them. This panel keeps the owner informed as to
how much current is being drawn, and helps them understand how current
is being drawn by each appliance.
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EcoVantage Mobile Catalog
