Description
8444-1067 Digital governor system
8444-1067 Digital governor system
Module Clips Drive controller servo motor
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The 2301A Full
Authority Speed
Control sets the
speed or load of a
diesel engine, gas
engine, steam
turbine, or gas
turbine according
to the demand of
a process or a
computer control
signal of 4–20 mA
or 1–5 Vdc.
The unit provides
isochronous
operation, with
droop control
available through
an externallywired
potentiometer. The isochronous mode is used for constant speed of the controlled
prime mover as long as it is able to provide power to satisfy the load. Droop control
is provided when parallel-bus operation is required.
The Full Authority Speed Control is compatible with Woodward SPM-A
synchronizers, load sensors, and other power generation controls. These auxiliary
controls can be added to the system at any time, connecting the auxiliary or SPM
inputs to the 2301A Speed Control.
The control is available for forward- or reverse-acting applications.
High-voltage models accept 88 to 132 Vac or 90 to 150 Vdc. Low-voltage models
accept 10 to 40 Vdc supply.
Programmable Logic Control (PLC) is easily adapted to engine control with the use
of the 4–20 mA speed setting input. The low-limit setting can prevent engine
shutdown, even with loss of the PLC signal. Reverse-acting controls may be teamed
with EGB or PG-EG governor/actuator for a mechanical ballhead backup.
Description
The 2301A Full Authority Speed Control is housed in a sheet-metal chassis and
consists of a single printed-circuit-board assembly. All adjustments are accessible
through the front of the chassis.
Speed range is set by positioning an internal switch, accessible inside the cover of
the control. Speeds are set according to the speed-sensor output frequency in hertz.
4–20 mA or 1–5
Vdc full authority
speed setting
Isochronous or
droop speed
control
Low- and highvoltage models
Signal converter
included in same
control package
High and low
speed adjustments
Start fuel limit with
override
Woodward 02301 p.2
Special circuits provide high- and low-limit adjustments. These limits set the maximum and minimum speed that can
be set by varying the speed-setting milliamp or voltage reference. The low limit can be set as high as rated speed, if
desired, limiting the ability of the process or computer speed setting to reduce speed. If needed, the low-limit setting
can be used to control engine operation on loss of the speed-reference signal.
The start-fuel limit sets a maximum actuator position during the start sequence. It is biased out of the way when
speed reaches the control set point. This feature
can be used to limit excessive startup smoke, reduce cylinder wear caused by the washing action of excessive fuel,
and help reduce startup time. An external switch connection is provided to disable the start-fuel limit, if desired, to
prevent reverse-acting systems from reverting to the start-fuel position on loss of magnetic pickup.
All 2301A controls feature an internal, isolated power supply for improved noise immunity and ground-loop
protection. The control provides maximum protection from electromagnetic and radio-frequency interference.
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1.Has been engaged in industrial control industry for a long time, with a large number of inventories.
2.Industry leading, price advantage, quality assurance
3.Diversified models and products, and all kinds of rare and discontinued products
4.15 days free replacement for quality problems
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