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GAC ESD-5550 Series, Manual

The GAC ESD-5550 Series manual is available for free download on our website. This comprehensive user manual provides step-by-step instructions on operating and maintaining your GAC ESD-5550 series product. Download now and get acquainted with all the features and functionalities to optimize your experience with this exceptional product.

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3

Governors America Corp. © 2020 Copyright All Rights Reserved

ESD5550-5570 Series Speed Control Unit

   

9-2020-E

   

PIB1003

4

WIRINg

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 shutoff device such as a fuel solenoid must be used. 

Summary of Contents for ESD-5550 Series

Page 1: ...er DNV GL Bureau Vertas PHYSICAL Dimension See Section 3 Installation Weight 1 8 lbf 0 82 kgf Mounting Any position vertical preferred The ESD5550 5570 series speed control unit is an all electronic device de signed to control engine speed with fast and precise response to transient load changes This closed loop control when connected to a proportional electric actuator and supplied with a magneti...

Page 2: ...ed Control Unit 9 2020 E PIB1003 3 Installation Mount in a cabinet engine enclosure or sealed metal box Vertical orientation allows fluids to drain in moist environments Dimensions Avoid extreme heat in mm Take into account the following preferences when mounting the speed controller ...

Page 3: ...1003 4 Wiring 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 shutoff device such as a fuel solenoid must be used ...

Page 4: ...sure no other part of the shield comes in contact with engine ground otherwise stray speed signals may be introduced into the speed control unit With the engine stopped adjust the gap between the magnetic speed sensor and the ring gear teeth The gap should not be any smaller than 0 020 in 0 45 mm Usually backing out the speed sensor 1 4 to 1 2 turn after touching the ring gear teeth will achieve a...

Page 5: ...g The overspeed function is now set to approximately 10 above the requested speed 1 2 ON STABILITY GAIN SPEED OVERSPEED ADJUSTING OVERSPEED ADJUSTMENT SWITCH POTENTIOMETER SWITCH FACTORY SETTING NOTES SPEED 25 turn 1470 Hz 50 Hz w min trim GAIN 270 turn 50 Middle position STABILITY 270 turn 50 Middle position DROOP 270 turn 0 CCW IDLE 270 turn 1075 75 Hz STARTING FUEL RAMP 270 turn 100 CW Maximum ...

Page 6: ...obtained with an optional 5K Speed Trim Control See section 4 Wiring diagram Once the engine is at operating speed and at no load the following governor performance adjustment can be made PARAMETER PROCEDURE GAIN 1 Rotate the GAIN adjustment clockwise until instability develops 2 Gradually move the adjustment counterclockwise until stability returns 3 Move the adjustment one division further count...

Page 7: ...t governs well with 0 5 volts RMS speed sensor signal A speed sensor signal of 3 volts RMS or greater at governed speed is recommended Measurement of the signal is made at Terminals C and D 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 02 in 0 5 mm When the engine is stopped ...

Page 8: ... governor system After the actuator goes to full fuel disconnect the speed sensor at Terminal C D If the actuator is still at full fuel speed then the speed control unit is defective 2 Manually hold the engine at the desired running speed Measure the DC voltage between Terminals A F on the speed control unit 1 If the voltage reading is 1 0 to 2 0 V DC SPEED adjustment is set above desired speed De...

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