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Freedom Sequence Operational Concepts
Auto-Detection of AC Input Source
(Shore/Gen)
The Freedom Sequence power manager can be wired to a transfer switch
that is connected to either a shore power or a generator power source. When
AC voltage is detected at the input terminal of the Freedom Sequence, the
AC source is assumed to be coming from shore power if the B+ signal is not
active. Freedom Sequence detects the B+ signal two ways: via the Xanbus
Automatic Generator Start (AGS) on the Xanbus network or through the
presence of 12 volts on the B+ signal wired to the DC auxiliary connector
port. The Freedom Sequence power manager assumes a generator power
source is On when a high B+ signal is detected from either source.
Auto-Detection of AC Input Source Type
(1-Ph/2-Ph)
The AC source connected at both Line1 and Line2 of the Freedom
Sequence power manager can be either Split phase or Single phase.
• Single phase is determined when 120 volts is measured between
Line1-to-Neutral or Line2-to-Neutral or both, and there is no phase
difference between the voltages measured.
• Split phase is determined when 240 volts is measured between
Line1and Line2 and that the voltages are found out of phase by more
than 100 degrees.
Loading of Shore/Generator Breaker Ratings
The Freedom Sequence has the ability to automatically change the breaker
settings from shore power (Shore Breaker) to generator power
(Generator Breaker) when it detects the B+ signal. At any time if the B+
signal goes low, the Freedom Sequence will instantly switch to the shore
breaker setting.
IMPORTANT:
The Freedom Sequence power manager automatically sets a
ceiling on the current that’s coming from either input sources. The goal of
this ceiling (current clamp) is to avoid current draw in the RV from tripping
the input source’s breaker when an overload occurs within the RV's power
system. Instead, the power manager’s AC Load Shedding (see next page)
logic will determine which loads to disconnect within the power system
while staying within the current clamp value. The current clamp is always
80% of the breaker rating of the input source. For example, if the shore
breaker in an RV Camp is set to 50 amps then, the current clamp is 80% of
50, which is 40 amps. However, when BRK Derating is disabled, the
current clamp is 100% of the breaker rating. See “Breaker Derating” on
page 22.
FSequence IPM Owners Guide.book Page 33 Thursday, October 6, 2011 3:33 PM