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Governors America Corp. © 2020 Copyright All Rights Reserved
ESD5500E Series Speed Control Unit 9-2020-F PIB1002
11
ADDITIONAl FEATURES AND OPTIONAl WIRINg
IDLe SPeeD SettInG
If the IDLE speed setting was not adjusted as detailed in Section 9 Starting
Fuel Adjustment, then place the optional external selector switch in the IDLE
position.
The idle speed set point is increased by the clockwise rotation of the IDLE
adjustment control. When the engine is at idle speed, the speed control unit
applies droop to the governor system to ensure stable operation.
If not using the idle method, you can lower idle to the bare minimum (even if it’s
not being used) for smoke reduction.
5.000
(127)
Ø0.266
(6,6)
CW
*
SEE SPECIFIC ACTUATOR PUBLICATION FOR PROPER
WIRING OF ACTUATOR BASED ON BATTERY VOLTAGE
1.031
(26)
*
OPTIONAL ACTUATOR
CABLE SHIELDING TO
MEET CE DIRECTIVE
5.750
(146)
5.000
(127)
5.500
(140)
A B C D E F G H J
L M N P
ACTUATOR
PICK-UP
BATTERY
AUX
10V
OUTPUT
C1 OFF
ON
LEAD CIRCUIT
OFF
ON
C2
SOFT COUPLING
BATTERY
_
+
S1
FUSE
15A MAX
GROUND REFERENCE
ADD JUMPER FOR 12V
BATTERY OR ACTUATOR
CURRENTS ABOVE 5A
SPEED TRIM
CONTROL - 5K
K
CLOSE FOR DROOP
CLOSE FOR IDLE
ACTUATOR
MAGNETIC
PICK-UP
DROOP
IDLE
- +
CAUTION
ENGINE SPEED CONTROL
COMPONENT. WHEN INSTALLING
OR SERVICING REFER TO
PRODUCT PUBLICATION.
SPEED CONTROL UNIT
ACCESSORY POWER
SUPPLY
ACCESSORY INPUT
DROOP
IDLE
SPEED
E3
GAIN
STABILITY
SWITCH
PROFILE
SPEED
RAMPING
STARTING
FUEL
E2
E1
DEAD TIME
COMPENSATION
JUMPER
S/N :
MODEL:
GA C
OVERNORS
MERICA
ORP.
MADE IN AGAWAM, MA U.S.A.
ESD5500E
WD554
LeaD cIrcuIt & Soft couPLInG
Switch 1(C1) controls the Lead Circuit. The normal position is ON.
Move the switch to the OFF position if there is fast instability in the
system.
Switch 2(C2) controls a circuit designed to eliminate fast erratic gover-
nor behavior, caused by very soft or worn couplings in the drive train
between the engine and generator.
The normal position is OFF. Use the ON position if you experience
fast erratic engine behavior between the engine and generator due to
a soft coupling.
C1 OFF
ON
LEAD CIRCUIT
OFF
ON
C2
SOFT COUPLING
DROOP
IDLE
SPEED
C1 OFF
ON
LEAD CIRCUIT
OFF
ON
C2
SOFT COUPLING
DROOP
IDLE
SPEED
acceSSorY InPut
The Auxiliary Terminal N accepts input signals from load sharing units,
auto synchronizers, and other governor system accessories, GAC ac-
cessories are directly connected to this terminal.
Terminal N is sensitive (145 Hz/V). Accessory connections
must be shielded.
When an accessory is connected to Terminal N, the speed will de-
crease and the speed adjustment must be reset.
If the auto synchronizer is used alone, not in conjunction with a load shar-
ing module, a 3 Ω resistor should be connected between Terminals N and
P. This is required to match the voltage levels between the speed control
unit and the synchronizer.
note
acceSSorY SuPPLY
The +10 volt regulated supply, Terminal P, can be utilized to provide power to GAC governor system accessories. Up to 20 mA of current can
be drawn from this supply. Ground reference is Terminal G.
2750 Hz x 60 seconds = 1500 RPM
110 Teeth
A short circuit on this terminal can damage the speed control unit.
Do not connect Terminals N and P directly to each other.
