
Manual 26247
2301D/2301D-EC Digital Control
Woodward
97
Symptom Cause
Solution
Prime mover will not
stabilize at rated no load
speed. The instability
may occur at no load or it
may vary with load.
Control may be erratic
(continued).
Necessary external wires not
properly shielded.
Electrical noise, caused by wiring
carrying an ac voltage, stray
magnetic fields from transformers,
etc., can be picked up by
improperly shielded wire. Noise
will cause instability if picked up by
lines associated with the amplifier
summing point such as external
speed trim, paralleling lines, droop
contact, magnetic pickup lines,
and synchronizer input.
The following tests will isolate noise and
interference.
Do not perform these tests in other than
single-unit operating configuration.
Jumper terminal 28 to terminal 33 and
remove wires to the Close for Rated
contact.
Remove wires to terminals 10, 11, 34–38,
19, and 20. Jumper terminals 28 and 34.
Remove the wires to the minimum fuel
contact at terminal 31.
Verify that the switchgear frame, governor
chassis, and prime mover have a common
ground connection. Temporarily remove the
battery charger cables from the control
battery system.
If the prime mover operation is significantly
improved by these modifications, replace
the wiring one at a time to locate the source
of the trouble.
External wiring may require additional
shielding or rerouting from high-current
lines or components.
If the problem cannot be resolved by these
checks, it will be necessary to remove the
2301D control from the switchgear.
Temporarily mount it next to the prime
mover and connect only a battery, magnetic
pickup, and actuator to the control (use a
separate battery placed next to the prime
mover). After starting the prime mover,
place a small jumper wire across terminals
28 to 33 and terminals 29 to 30 to cause the
prime mover to accelerate to rated speed. If
necessary, apply load to check stability.
If stability occurs when the control is
mounted next to the prime mover, return the
control to the switchgear. Run new
magnetic pickup, actuator, and battery
power lines. Shield all wires to the control.
Route all wires through conduit or an outer
shield. Tie the outer shield to system
ground at end opposite of the control.
Содержание 2301D
Страница 12: ...2301D 2301D EC Digital Control Manual 26247 4 Woodward Figure 1 1a 2301D Outline Drawing Ordinary Locations ...
Страница 13: ...Manual 26247 2301D 2301D EC Digital Control Woodward 5 Figure 1 1b 2301D Outline Drawing Hazardous Locations ...
Страница 14: ...2301D 2301D EC Digital Control Manual 26247 6 Woodward Figure 1 2a 2301D Plant Wiring Diagram sheet 1 ...
Страница 16: ...2301D 2301D EC Digital Control Manual 26247 8 Woodward Figure 1 2c 2301D Plant Wiring Diagram notes ...
Страница 51: ...Manual 26247 2301D 2301D EC Digital Control Woodward 43 Figure 3 4 Typical Transient Response Curves ...
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Страница 129: ...Declarations ...