Star Engineering

• The ESD5550 Speed Control Unit is an all electronic device designed to control engine seed with fast and precise response to transient load changes.
• The primary features of the Speed Control Unit ESD5550E are the engine STARTING FUEL and SPEED RAMPING adjustment.
• The ESD5550 Speed Control Unit is compatible with all proportional actuators except the ACB2000 electric actuator.
• When the ESD5550E Speed Governor is used with a ADC100 Series electric actuator, the DROOP adjustment range will be less due to this actuator’s low current demand
• ESD5550E Speed Control Unit Engine Governor Controller for Diesel Generator
• Simplicity of installation and adjustment was foremost in the design. Non-interacting performance controls allow near optimum response to be easily obtained.
• The primary features of the Speed Control Unit ESD5550E are the engine STARTING FUEL and SPEED RAMPING adjustment. The use of these features will minimize engine exhaust smoke experienced prior to attaining engine operating speed.
• Other features include adjustable droop and idle operation, inputs for accessories used in multi-engine or special applications, protection against reverse battery voltage, transient voltages, accidental short circuit of the actuator and fail safe design in the event of loss of speed sensor or battery provide.
• The speed control unit is rugged enough to be placed in a control cabinet or engine mountedenclosure with other dedicated control equipment. If water, mist, or condensation may come in contact with the controller, it should be mounted vertically. This will allow the fluid to drain  away from the speed control unit. Extreme heat should be avoided.
• An overspeed shutdown device, independent of the governor system, should be provided to prevent loss of engine control, which may cause personal injury or equipment damage. Do not rely exclusively on the governor system electric actuator to prevent overspeed. A secondary shutoff device, such as a fuel solenoid, must be used. 
• Basic electrical connections are illustrated in Diagram 2 (for the ESD-5550, ESD-5555 and the
• ESD-5570) and Diagram 3 (for the ESD-5556 only). Actuator and battery connections to Terminals A, B, E, and F should be #16 AWG (1.3 mm2) or larger. Long cables require an increased wire size to minimize voltage drops. The battery positive (+) input, Terminal F, should be fused for 15 amps as illustrated.
• Magnetic speed sensor wires connected to Terminals C and D MUST BE TWISTED AND/OR
• SHIELDED for their entire length. The speed sensor cable shield should ideally be connected as shown in Diagram 2 or 3. The shield should be insulated to insure 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 3/4 turn after touching the ring gear teeth will achieve a satisfactory air gap. The magnetic speed sensor voltage should be at least 1 VAC RMS during cranking
• The speed control unit governed speed setting is factory set at approximately engine idle speed. (1000 Hz., speed sensor signal) Crank the engine with DC power applied to the governor system. The governor system should control the engine at a low idle speed. If the engine is unstable after starting, turn the GAIN and STABILITY adjustments CCW until the engine is stable.
• The governed speed set point is increased by a CW rotation of the SPEED adjustment control. Remote speed adjustment can be obtained with an optional 5K Speed Trim Control.
• Release the TEST button. After the engine stops, press the RESET button or remove battery power

• This is the best way of governing a generator where strict control of engine speed is desired irrespective of engine load. As the load is added and removed, the governor maintains a constant engine speed, stabilizing the load.
• Save Energy Cost by regulating your engine speed according to the load requirements. Control a wide variety of engines in an isochronous or droop mode. It is designed for high reliability and built ruggedly to withstand the engine environment. Accessory Inputs for Load Sharing Variable Speed Operation available.
• Speed Control Units are application based and can be used with any of GAC's actuators. Types of Actuators: Throttle Body, Pump Mounted, Engine Mounted and/or Universal.
• An electronic speed control system consists of four major components: flywheel, magnetic speed pickup, speed controller and an actuator .The speed controller compares the desired speed to the speed measured from the magnetic speed pickup.
• Application in: MILlitary grade equipment, Rail, Marine, Industrial, Heavy Machinery, Gaseous Engines, Power Generation, Oil & Gas and much more... GAC is ISO 9001 certified | We carry the complete line of Governors America Corp products, email Thunder Parts your requirements!
• ESD5111 | Designed to control engine speed with fast and precise response to transient load changes | Multi-VDC / Isochronous, Variable & Droop Operation | 100% Original GAC | 1 Year Warranty! ESD5100 SERIES (CE)- ANALOG GOVERNORS The ESD5100 Series speed control unit is an all- electronic device designed 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 magnetic speed sensor signal, will control a wide variety of engines in an isochronous or droop mode. It is designed for high reliability and it's hard potted to withstand the engine environment. Multi-VDC - Isochronous, Variable & Droop Operation - Adjustable PID - Idle Speed Adjustment - Auxiliary Accessory Input - Temperature Compensated Available - Soft Coupling Options - Available - EFC Reverse Acting Options Available - EFC Forward Acting - Light Force Option - Av
• The ESD5100 Series speed control unit is an all- electronic device designed 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 magnetic speed sensor signal, will control a wide variety of engines in an isochronous or droop mode. It is designed for high reliability and it's hard potted to withstand the engine environment.
• Basic electrical connections are illustrated in Diagram 2. Actuator and battery connections to
• Terminals A, B, E, and F should be #16 AWG (1.3 mm sq.) or larger. Long cables require an increased wire size to minimize voltage drops.
• The battery positive (+) input, Terminal F, should be fused for 15 amps as illustrated. The
• ESD-5100 series is suitable for 12 VDC and 24 VDC operation.
• Magnetic speed sensor wires connected to Terminals C and D MUST BE TWISTED AND/OR SHIELDED for their entire length. The speed sensor cable shield should ideally be connected as shown in Diagram 2. The shield should be insulated to insure 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 3/4 turn after touching the ring gear teeth will achieve a satisfactory air gap. The magnetic speed sensor voltage should be at least 1 VAC RMS during cranking. 
• The speed control unit governed speed setting is factory.

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