When
you require a complete basic automatic transfer switch, we have the solution.
The AST3225 Transfer Switch is designed to UL-1008, and has an ES-53 Auto-Start
Engine Controller that has all the necessary delay timers. Available as options
are a 7 day exerciser and an adjustable drop-out voltage relay. The AST3225 is
rated at 225Amps, to 240VACin the 2 pole configuration. It comes complete with a
NEMA3R enclosure.
FEATURES
The
AST 3225 Auto-Start Transfer Switch System provides an automatic transfer of an
electrical load to a stand-by power supply in the event of a drop, or loss of
voltage, on any or all phases of the normal power supply. Upon the restoration
of normal power, the electrical load is automatically re-transferred to the
normal power supply. The base unit comes complete with an ES-53 Controller,
which starts the engine automatically and provides the necessary timing
functions. All time delays are built into the ES-53, and are fixed to simplify
installation, start-up, and field servicing. Included are the following timers:
-
TDES
(Time Delay Engine Start): Adjustable
from 0-32 seconds. This delay is necessary to prevent unnecessary engine starts.
This delay also doubles as a preheat timer utilizing terminal 12 for diesel
glow-plugs, if necessary.
-
TDNE
(Time Delay Normal to Emergency): 4
seconds. This allows the engine to stabilize before load transfer.
-
TDEN
(Time Delay Emergency to Normal): 3
minutes. This allows a delay after the utility returns, to ensure it has indeed
returned and stabilized.
-
TDEC
(Time Delay Engine Cool): 5 minutes.
This allows the engine to continue running for a set time after transfer of the
load back to the utility, to circulate coolant for a safe cool-down.
OPTIONS
Engine Exerciser:
This 7-day adjustable timer
allows the engine to start automatically, to recharge the battery and exercise
the engine, without initiating transfer.
Adjustable Low Voltage Sensing Relay:
In some
areas, the utility power supply may be prone to brown-out or low voltage
conditions. This relay prevents motor burnout conditions.
BENEFITS
With an AST3225
Auto-Start Transfer Switch
System, and any generator having an electric starter, you can have a dependable
stand-by power system, that will automatically supply you with back-up power
when your primary power supply is lost. You can install an ES-53 Controller on
your engine now, for remote start capability, and at a later date, purchase the
remainder of the system, at no increase in total cost. Our removable connectors
permit "PLUG AND RUN" operation. The molded case switches have zero
stand-by power draw, unlike contactor based systems. The 225Amp rating enables
handling of full load to most residential and small commercial electrical
services; this enables stand-by power to be sent to any circuit in the facility.
With a "PONY PANEL" installation, only the dedicated circuits can be
powered when the utility is absent.
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