GAC ESD5300 Series User manual

1ESD5300 Speed Control Unit 09-2020-H PIB1041
Governors America Corp. © 2020 Copyright All Rights Reserved
ESD5300 Series
Speed Control Unit
1OVERVIEW
PERFORMANCE
Isochronous Operation ± 0.25 %
Speed Range / Governor 1.0 - 7.5 KHz Continuous
Speed Drift with
Temperature ± 1% MAX
Idle Speed Adjust Range 25 - 85 % of rated speed
Droop Range 0 - 5 % for a 1.5 A actuator
current change
Speed Trim Range ± 200 Hz
Remote Variable Speed
Range
ACCEL: 266 Hz/s - 1300 Hz/s
DECEL: 250 Hz/s - 1000 Hz/s
Starting Fuel Adjustment
0.0 - 1.5 A
0.3 - 5.0 A
120, 175, 225, 275 Actuators / SW2-7
OFF
(24 V DC Only) 2001 Actuator / SW2-7
ON
Overspeed Set Point 2330 Hz - 8500 Hz
Crank Termination Set
Point
200 Hz - 2050 Hz
Terminal Sensitivity
H
M
K
N
105 Hz, ±15 Hz/V @ 5 kΩ Impedance
130 Hz, ±15 Hz/V @ 1 MΩ Impedance
685 Hz, ±40 Hz/V @ 326 kΩ Impedance
1000 Hz, ±50 Hz/V @ 8 k Ω Impedance
RELIABILITY
Vibration 1 G, 20 - 100 Hz
Shock 10 G (11 ms)
Testing 100 % Functional Testing
INPUT / OUTPUT
Supply 24 V DC Battery Systems
(Transient and
Reverse Voltage Protected)
Maximum Continuous
Supply
32 V DC
Polarity Negative Ground
(Case Isolated)
Power Consumption 100 mA (no actuator current)
Speed Signal Range 1.0 - 50 V AC
MAX Actuator Peak Current 15 A
MAX Current, Relay Contact
(Terminals 1 - 6) Rating 6 A
Chopping Frequency Range 60 - 380 Hz
ENVIRONMENTAL
Ambient Temperature -40 to 85 °C (-40 to 185 °F)
Relative Humidity up to 95 %
All Surface Finishes Fungus Proof
and Corrosion Resistant
COMPLIANCE / STANDARDS
Agency CE and RoHS Requirements
PHYSICAL
Dimension See Section 4, Installation
Weight 3 lbf ( 1.36 kgf )
Mounting Any position, vertical preferred
2SPECIFICATIONS
The ESD5300 Series Speed Control units are designed to precisely
control engine speed and provide fast, precise response to transient
engine loads. The ESD5330 and 5340 speed control can be used with
all GAC Actuators, including the ACB2001. A complete, closed-loop
control system is formed with the addition of a magnetic pickup signal
sensing engine speed and 24 V DC power.
◊ Two-element speed switch
◊ Speed ramping idle to operating speed
◊ Starting fuel control for lower engine exhaust emissions
◊ Unique actuator power drive circuit
◊ Accessory inputs for load sharing
◊ Variable speed governing
◊ Protection against reverse battery and transient voltage
◊ Advanced startup circuit for large-bore engines (ESD5340)

2ESD5300 Speed Control Unit 09-2020-H PIB1041
Governors America Corp. © 2020 Copyright All Rights Reserved
3INSTALLATION
The ESD5300 speed controller can be placed in a control cabinet or engine mounted enclosure with other control equipment. If water,
mist, or condensation can come in contact with the controller, it should be mounted vertically, to allow any accumulated uids to drain
away from the unit.
WIRING
4
TERMINAL DEFINITION NOTES
A & B Actuator (+/-) 14 AWG wire
C & D Battery Power (-/+)
• 14 AWG wire
• 20 amp fuse must be installed in the positive battery lead to protect against any overload or
short circuit
• Battery positive (+) input is Terminal D
E & F Magnetic Pickup
(- is ground)
• Wires must be twisted and/or shielded for their entire length
• Gap between speed sensor and gear teeth should not be smaller than 0.02 in. (0.45mm)
• Speed sensor voltage should be at least 1.0 V AC RMS during crank
G Ground Signal
HFrequency Trim Shielded cable required for lengths over 15 ft (5 m) and connected to Terminal G
J & K Droop Active when closed
L & R Gain 1 & Gain 2 Gain 1 when open / Gain 2 when closed
M Aux Input Load Sharing / Synchronizing, Ground at Terminal G
N & P Idle Active when closed
1 - 6 Overspeed Relay Contacts
5 - 6 Crank Relay Contacts Active when closed
RECOMMENDATIONS
1. Shielded cable should be used for all external connections to the ESD control.
2. One end of each shield, including the speed sensor shield, should be grounded to a single point on the ESD case.
An overspeed shutdown device, independent of the governor system, must be provided to prevent loss of engine control
which may cause personal injury or equipment damage. Do not rely exclusively on the governor system to prevent over-
speed. A secondary shuto󰀨 device such as a fuel solenoid must be used.

3ESD5300 Speed Control Unit 09-2020-H PIB1041
Governors America Corp. © 2020 Copyright All Rights Reserved
WIRING (CONTINUED)
4

4ESD5300 Speed Control Unit 09-2020-H PIB1041
Governors America Corp. © 2020 Copyright All Rights Reserved
PRE-START SETUP
5
Before starting the engine, preset at minimum the following adjustments.
1. Set GAIN, STABILITY, and External Frequency Trim (if used) are set to their mid point (50) positions.
2. Set STARTING FUEL is set to 100 initially.
3. Ensure Dip Switches SW2-5, SW2-6, and SW2-7 are set in their normal positions before starting the engine as shown in the DIP
SWITCHES table below.
4. Set all other Dip SW2 switches (1 - 4) for optimum engine performance per the DIP SWITCHES table. Take into account the factory
speed setting for the controller is 1400 Hz, or approximately set to idle speed. The crank termination is set very low initially.
* When switch C2 is ON, the Soft Coupling feature is enabled.
** SW2 Switches 5-8 must be set to match the actuator being used in the application. Contact GAC for questions.
DIP SWITCHES
ROW SWITCH FUNCTION NORMAL POSITION
SW1 1 Lead Lag Circuit OFF
2 Soft Coupling OFF
SW2
1 DTC 8X OFF
2* DTC 4X OFF
3 DTC 2X OFF
4 DTC 1X OFF
5**
(adjust with engine
stopped)
Speed Loop Gain 4X For Actuator
Series
120, 225, 175, 275 = ON
335, 2001 = OFF
6** Act Loop Gain
(7 A MAX) (15 A Peak)
For Actuator
Series
120, 225, 175, 275 = ON
335, 2001 = OFF
7** Act Loop Gain
(7 A MAX) (15 A Peak)
For Actuator
Series
120, 225, 175, 275 = OFF
335, 2001 = ON
8** Added DTC 11 ms
65 ms
For Actuator
Series
120, 225, 175, 275 = OFF
335, 2001 = ON
6START THE ENGINE
If crank termination occurs too quickly preventing the engine from starting, turn the crank termination adjustment clockwise (CW). The
actuator should snap to full fuel until the engine starts and run at a low idle setting. Adjust the SPEED setting CW for the desired oper-
ating speed. If the engine is still unstable, turn the GAIN and STABILITY adjustments CCW until the engine is stable.
If the IDLE speed adjustment is set too low, the engine may never exceed the crank termination point, possibly causing starter
damage.
If the system remains unstable or not operating properly, see SECTION 10, System Troubleshooting.
Read this entire document before starting your engine.
7GOVERNOR SPEED SETTING
The governed speed set point is increased by clockwise rotation of the SPEED adjustment pot. Remote speed adjustment can be ob-
tained with an optional 5K Frequency Trim Control. See Section 4, WIRING for more information.
Failure to set these dip switches may cause startup engine trouble. See Section 10, System Troubleshooting, SW2
SWITCH SETTINGS FOR INSTABILITY table for additional information.

5ESD5300 Speed Control Unit 09-2020-H PIB1041
Governors America Corp. © 2020 Copyright All Rights Reserved
A strip chart recorder can be used to further optimize the adjustments. If further performance improvements are required,
See Section 10, System Troubleshooting, for more information.
8INITIAL ADJUSTMENTS
Once the engine is running at operating speed and at no load, the following governor performance adjustment can be made to increase
engine stability.
PARAMETER ADJUSTMENT PROCEDURE
P
(GAIN)
1.
2.
3.
4.
Rotate the GAIN adjustments CW until instability develops.
Gradually move the adjustment CCW until stability returns.
Move the adjustment one division further CCW to ensure stable performance.
If instability persists, adjust the next parameter.
I
(STABILITY)
1.
2.
Follow the same adjustment procedure as the P parameter using the Stability potenti-
ometer.
If instability persists, adjust the next parameter.
D
(DEADTIME) 1. Follow the instability procedure in Section 10, System Troubleshooting.
NOTE
ADDITIONAL FEATURES
9
Many applications require a exible coupling between the engine and its load. This can take the
form of a soft rubber segmented coupling or a drive shaft which behaves as a natural spring.
These couplings are used for alignment purposes, torsional considerations, or due to excess
length of the drive shaft. When a drive train produces a resonant device causing variable loads
at a cylindrical rate to be placed on the engine and its ywheel, this can cause excessive throttle
movement at the same frequency as the resonance. The ESD5300 speed control unit has a
special circuit, SOFT COUPLING, that minimizes the o󰀨set on the resonances on the governor.
If the system exhibits these resonance characteristics, set dip switch SW1, C2 to
ON to activate soft coupling. Readjust the control system per the procedure in Sec-
tion 8, Adjustments, and the result should be a signicant reduction in throttle dither.
Although the governor does not respond to the resonance any longer does not mean the reso-
nance is not still present in the drive train.
If droop operation is desired (speed setting reduces with increased engine load), close the
switch contact across Terminals J and K.
Rotate the DROOP adjustment CW to increase the droop percentage 0 setting (Full CCW)
= Zero droop. 100 = maximum droop.
SOFT COUPLING / RESONANT DRIVE TRAINS
SPEED DROOP OPERATION
NOTE

6ESD5300 Speed Control Unit 09-2020-H PIB1041
Governors America Corp. © 2020 Copyright All Rights Reserved
Turn the STARTING FUEL to minimum CCW position (0).
Crank the engine and quickly rotate the STARTING FUEL adjustment CW until the engine starts
without excess smoke. Repeat several times to nd the best setting. Some engines require large
amounts of fuel to start but most modern engines respond to limited fuel during cranking.
Once the engine starts repeatedly in a satisfactory manner, adjust the FUEL RAMPING adjustment
CW so the engine accelerates to rated speed quickly, without excess smoke. The acceleration
adjustment may be set to the fastest positions if start fuel ramping is not desired.
The ESD5340 has an advanced startup circuit that adjusts cranking fuel for faster startups.
STARTING FUEL AND FUEL RAMPING ADJUSTMENT
ADDITIONAL FEATURES (CONTINUED)
9
To set idle and ramp speeds:
• Close the IDLE switch connecting Terminals N and P. This will cause the engine to slow to an
idle speed.
• Adjust the IDLE setting for desired idle speed.
• Open the IDLE switch between Terminals N and P. The engine will start accelerating toward
rated speed.
• Adjust the ACCEL control to allow the engine to accelerate with just enough fuel to bring the sys-
tem to operating speed with lowest emissions. The desired acceleration and deceleration rates
can be achieved by manipulating the ACCEL and DECEL adjustments.
• Cycle the IDLE switch after each ACCEL or DECEL adjustment change until the desired results
are achieved. Use an oil pressure switch to operate these contacts.
• Open Terminals N and P and the engine speed will decelerate at a rate set by the DECEL control
CW is faster for both ACCEL and DECEL functions.
IDLE AND RAMP SETTING
Each time the ESD5300 Series controller is started the speed ramping function operates by taking control of the engine at near idle po-
sition and automatically raises the engine speed until the speed set point is reached. The acceleration time is controlled by the acceler-
ation control. If the idle switch is then closed, the speed will decelerate at the rate set by the deceleration adjustment (DECEL) control.
During these ramping periods, the speed control has a small amount of droop added to attain stability at low engine speeds. The droop
is eliminated once rated speed is reached unless droop is added by closing the switch at Terminals J and K.
The internal ramp generator can also be used for a wide range variable speed applications.
• To add variable speeds, connecting a 0-10 V DC variable voltage to Terminal N with respect to Terminal G.
• To calibrate the speed range, either limit the voltage to a level which provides the desired range with an external potentiometer or
add resistance in series with Terminal N as shown in Section 4 Wiring.
INTERNAL SPEED RAMPING FUNCTION
The ESD5300 can operate with two distinct gain settings. The two gain adjustments, Gain 1 and Gain 2 are independent adjustments.
• With the connection from Terminals R and L set Open, the Gain 1 adjustment is in operation.
• With a connection from R to L set Closed, Gain 2 is in operation.
• Switching between the two gain settings should have an imperceptible di󰀨erence in speed change.
The dual gain function is especially useful for engines which exhibit di󰀨erent characteristics under di󰀨erent situations. An engine may
run very stable at high speeds and less stable at lower speeds. Setting a single gain control for the lower speeds then yields less than
an optimum setting at the higher speeds.
A simple switch can be toggled for low or high speed operation. Additionally in gaseous fuel engine applications where the quality or type
of gas is changed, the two gain settings can be used to idealize the governor for each type of fuel.
For cold engine instability, a temperature-sensing switch can reset the speed control gain once the engine has reached a normal operat-
ing temperature.
DUAL GAIN

7ESD5300 Speed Control Unit 09-2020-H PIB1041
Governors America Corp. © 2020 Copyright All Rights Reserved
The actuator chopping frequency can be varied using the potentiometer labeled CF ADJ. This
chopping frequency applied to the actuator provides an additional stability enhancement as
the dither shakes the actuator to overcome static friction and ensure its immediate response.
ADDITIONAL FEATURES (CONTINUED)
9
The overspeed monitor circuit trip point is set by the multi-turn potentiometer.
• Set overspeed by raising the engine speed to the specic trip point speed and turning
the OVERSPEED adjustment CCW until the overspeed circuit turns ON (Red LED).
This will also turn o󰀨 the actuator output circuit and change the state of the internal
relay contacts at Terminals 1, 2, 3.
• To reset the overspeed circuit, push the RESET switch through the hole provided or
cycle the DC power to the unit. The Test switch will reduce the overspeed setting about
20%. If the engine is running at rated speed and the Test button is pushed the over-
speed monitor circuit should trip.
The relay contacts at Terminals 1, 2, 3 should be used to turn o󰀨 the engine, either fuel or
air.
Do not rely on time control to turn o󰀨 the actuator as a means of shutting o󰀨 the
engine. A fault could have occurred in the actuator, linkage, cables, etc. which the
ESD5300 does not control.
When no power is applied to the ESD5300, the crank relay contacts, Terminals 5 and 6,
are normally closed.
As the speed increases, the internal relay will change state and the green LED will light.
The speed setting at which the LED lights is determined by the multi-turn CRANK TERMI-
NATION speed setting potentiometer.
Adjust CRANK TERMINATION CW to increase the speed at which this transition takes
place.
Once the circuit has tripped, the crank termination circuit will remain tripped until DC power
is removed from the unit. This will reset the function.
ADJUSTABLE CHOPPING FREQUENCY
OVERSPEED MONITOR
CRANK TERMINATION
After the Droop, Frequency Trim, and/or accessory inputs have been connected, readjust the operating SPEED and IDLE.
FINAL SPEED SETTING

8ESD5300 Speed Control Unit 09-2020-H PIB1041
Governors America Corp. © 2020 Copyright All Rights Reserved
The AUXiliary input, Terminal M. directly accepts output signals from GAC Load Sharing units, Auto Synchronizers and other governor
system accessories. Consult the applicable GAC publications for details. It is recommended that this connection from accessories be a
shielded cable as it is a sensitive input terminal.
If the GAC Auto Synchronizer is used alone, not in conjunction with a Load Sharing Module, a resistor must be installed be-
tween Terminals M and L. If a frequency trim potentiometer is also used, the resistor should be 910 K Ω. If no frequency trim is
used, the resistor should be 1.2M Ω. This is required to match the voltage levels between the ESD5300 speed controller and
the synchronizer.
NOTE
The +10 V regulated supply, Terminal L, can be utilized to provide power to GAC governor system accessories. Up to 40 mA of current
can be drawn from this supply. The ground reference for this supply is Terminal G.
10 SYSTEM TROUBLESHOOTING
If the engine governing system does not function, the fault may be determined by performing the voltage tests described in Steps 1
through 3. Positive (+) and negative (-) refer to meter polarity. Should normal values be indicated during troubleshooting steps, then the
fault may be with the actuator or the wiring to the actuator. Tests are performed with battery power on and the engine o󰀨, except where
noted. See your actuator publication for the testing procedure for that actuator.
HertzMAG PICKUP = (RPM x #Teeth)
60sec
RPM = (HertzMAG PICKUP x 60sec)
#Teeth
Conversion Formulas
STEP WIRES NORMAL READ-
ING
PROBABLE CAUSE OF
ABNORMAL READING
1 D(+)&C(-) Battery Supply
Voltage
1.
2.
3.
DC battery power not connected. Check for blown fuse
Low battery voltage
Wiring error
2 E & F 1.0 V AC RMS min.
while cranking
1.
2.
3.
Gap between speed sensor and gear teeth too great. Check Gap
Improper or defective wiring to the speed sensor. Resistance between 3 and Ground should be 160
to 1200 ohms. See your specic magnetic pickup data for resistance.
Defective speed sensor.
3 L(+)&G(-) 10 VDC,
Internal Supply
1.
2.
Short on Terminal P. ( This will cause a defective unit)
Defective speed control unit
4 A(+)&C(-) 2.0 V less than bat-
tery voltage while
cranking
1.
2.
3.
4.
5.
6.
Starting FUEL LIMIT set too low.
IDLE set too low.
SPEED adjustment set too low.
Wiring error to the actuator.
Defective speed control.
Defective actuator.
ACCESSORY INPUT
ADDITIONAL FEATURES (CONTINUED)
9
ACCESSORY SUPPLY
SYSTEM INOPERATIVE

9ESD5300 Speed Control Unit 09-2020-H PIB1041
Governors America Corp. © 2020 Copyright All Rights Reserved
If unsuccessful in solving instability, contact GAC for assistance.
[email protected] or 413-233-1888
SW2 SWITCH SETTINGS FOR INSTABILITY
SLOW INSTABILITY
SEQUENCE SW2-1 SW2-2 SW2-3 SW2-4 FAST INSTABILITY
SEQUENCE
1ON ON ON ON 16
2ON ON ON OFF 15
3ON ON OFF ON 14
4ON ON OFF OFF 13
5ON OFF ON ON 12
6ON OFF ON OFF 11
7ON OFF OFF ON 10
8ON OFF OFF OFF 9
9 OFF ON ON ON 8
10 OFF ON ON OFF 7
11 OFF ON OFF ON 6
12 OFF ON OFF OFF 5
13 OFF OFF ON ON 4
14 OFF OFF ON OFF 3
15 OFF OFF OFF ON 2
16 OFF OFF OFF OFF 1
The speed control unit will govern well with 1.0 V AC RMS speed sensor signal. A speed sensor signal of 3 V RMS or greater at
governed speed is recommended. A strong magnetic speed sensor signal will eliminate the possibility of missed or extra pulses. The
amplitude of the speed sensor signal can be raised by reducing the gap between the speed sensor tip and the engine ring gear. The
gap should not be any smaller than 0.020 in (0.45 mm). When the engine is stopped, back the speed sensor out by 3/4 turn after
touching the ring gear tooth to achieve a satisfactory air gap.
INSTABILITY SYMPTOM PROBABLE CAUSE OF
ABNORMAL READING
Fast Insta-
bility
An irregularity of
speed above 3Hz.
(Perceived as a
jitter)
1.
2.
3.
Set SW1 C1 to OFF (Lead/Lag) and/or set SW2 switches 1,2, and 3 to ON (DTC).
If instability continues set SW1 C2 (Soft Coupling Filter) to ON.
If instability continues turn o󰀨 battery changers or other electrical equipment to see if the symptom
disappears.
Slow Periodic An irregularity of
speed below 3Hz.
(Sometimes severe)
1.
2.
Set SW1 C1 (Lead/Lag) to ON.
If instability continues set SW2 switches (DTC) to the ON/OFF positions in the sequential order de-
scribed in the SW2 SWITCH SETTINGS FOR INSTABILITY table.
Slow Periodic
(continued)
An irregularity of
speed below 3Hz.
(Sometimes severe)
1. If slow stability is una󰀨ected by the explained procedure above, add a small amount of droop.
Additional Dead Time Control can be added by connecting a capacitor across the two posts below the
ACCEL/DECEL adjustments. The positive side (+) of the cap is to be connected to E3. 20 MFD and
above should be used.
For slow instability use the table below to set the SLOW INSTABILITY SEQUENCE and for fast instability use the FAST INSTABILITY
SEQUENCE. Start by setting the switches to reect Sequence 1. If instability persists, adjust the switches to reect Sequence 2.
Continue through each sequence until instability stops.
10 SYSTEM TROUBLESHOOTING (CONTINUED)
INSTABILITY
INSUFFICIENT MAGNETIC SPEED SIGNAL
EMI SUSCEPTIBILITY
The governor system can be adversely a󰀨ected by large interfering signals that are conducted through the cabling or through direct
radiation into the control circuits. All GAC speed control sensors contain lters and shielding designed to protect the units sensitive
circuits from moderate external interfering sources.
If it is suspected that external elds, either those that are radiated or conducted, are or will a󰀨ect the governor systems operation, it is
recommended to use shielded cable for all external connections. Be sure that only one end of the shields, including the speed sensor
shield, is connected to a single point on the case of the speed control unit. Mount the speed control to a grounded metal back plate
or place it in a sealed metal box.