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Related Manuals for Regal Marathon Electric Pancake
Summary of Contents for Regal Marathon Electric Pancake
- Page 1 PANCAKE GENERATOR Installation, Operation and Maintenance Manual A Regal Brand...
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Page 2: Table Of Contents
TABLE OF CONTENTS INTRODUCTION ..........2 SAFETY . -
Page 3: Introduction
ELECTRONIC VOLTAGE REGULATED BRUSHLESS GENERATOR INTRODUCTION Thank you for choosing a MARATHON ELECTRIC PANCAKE Generator. Please read the installation and service sections of this manual carefully. A clean environment and proper installation are critical to generator performance. If you have any difficulty in installing or servicing your Marathon Generator, our service and technical staff will be happy to help you. -
Page 4: Mounting
Detach main rotor leads from the red and black DO NOT obstruct the generator intake and outlet threaded studs on rectifier assembly (See Figure 2 air passages. on page 9. Provide sufficient air circulation around the set to Remove exciter armature (rotor) mounting bolt from remove engine heat and to provide ample generator center of shaft, marking position of the rotor to aid cooling. - Page 5 Remount exhaust screen band. Reconnect all incoming power leads as shown on wiring diagram. To reassemble the armature, pull main rotor leads through the holes in the exciter rotor. Replace pot cover or control box cover. DO NOT PINCH ROTOR LEADS. Remove jack support from under engine flywheel housing.
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Page 6: Operation
OPERATION Open the input power to the automatic voltage regulator (AVR). Remove the fuse or disconnect and Initial Pre-Start Inspection insulate one of the AVR input power leads (see AVR Before starting the unit for the first time, the following manual) inspections and checks are recommended: Insure that all prime mover manufacturer’s pre-start-... -
Page 7: Shut Down Procedures
Shut down procedures. Periodically, about once every 2000 operating There are no specific instructions for shut down of the hours, or in conjunction with scheduled engine generator; however, several good engineering practices maintenance, check the DC no load excitation should be observed to prolong equipment life. voltage. -
Page 8: Restoring Residual Magnetism (Flashing The Exciter Field)
Restoring Residual Magnetism (Flashing the Exciter The diodes may be tested in the field without removing Field) them from the heat sinks. Electrically isolate the To restore the small amount of residual magnetism individual diodes by removing each of exciter rotor lead necessary to begin voltage buildup, connect a 12-volt flag terminals from the quick connect diode terminals, battery to the exciter field while the generator set is at... -
Page 9: Spare Parts
SPARE PARTS Always include the name of the part, the quantity of each HIGH VOLTAGES MAY BE PRESENT AT THE part ordered, and the serial and model numbers from the GENERATOR TERMINALS WHEN THE UNIT IS generator nameplate when ordering parts. For ordering RUNNING. - Page 10 SYMPTOM: GENERATOR PRODUCES NO VOLTAGE, OR RESIDUAL VOLTAGE CAUSE CHECK AND REMEDY AVR fuse blown. Check fuse with ohmmeter. Replace if bad. Refer to AVR manual. Voltmeter Off. Check meter selector switch to insure it is not in the Off position. Defective voltmeter.
- Page 11 SYMPTOM: GENERATOR PRODUCES FLUCTUATING VOLTAGE (May be indicated by light flicker) CAUSE CHECK AND REMEDY Irregular engine speed. Check engine for malfunction, or load for fluctuation AVR stability. Adjust AVR stability. Refer to AVR manual. Loose terminal or load connections. Make better connection both mechanically and electrically.
- Page 12 Trouble Shooting Pancake Generators The Marathon PANCAKE is a 4 lead, brushless, AVR regulated generator. They are small, dedicated, single phase generators between 8kW – 20kW. Normal output voltage is either 240Vac or 120Vac. A complete listing of models and specifications is included at the end of this trouble shooting guide. An PANCAKE generator is simple to trouble shoot with 6 main components: the exciter stator and exciter rotor windings, a voltage regulator, a rectifier assembly, and the main stator and main rotor windings.
- Page 13 SAFETY NOTE – Dangerous Voltage May Be Present During Testing Step 1 : Check Exciter Stator Continuity and Resistance SAFETY NOTE –Testing the exciter stator must be done with the gen-set shut down. Disconnect exciter stator leads F+ & F- from the voltage regulator – white leads in Figure 2. Using digital multimeter or analog meter check continuity between F+ &...
- Page 14 Step 2 : Constant Excitation Test SAFETY NOTE – The Constant Excitation test MUST be done with the gen-set running. Disconnect exciter stator leads F+ & F- from the voltage regulator – white leads in Figure 1 and observing polarity, connect to a 12V battery. The gen-set starting battery can be used as the source of constant excitation.
- Page 15 Step 4 : Checking Diodes / Rectifier Assembly The diodes may be tested in place. The White leads connect to three FORWARD stud type diodes, and the Black leads connect to three REVERSE stud type diodes. Remove each of the exciter rotor leads from the quick-connect diode terminals and remove the mail rotor leads from the main rotor terminals –...
- Page 16 Field Flashing / Restoring Residual Magnetism If the generator has been sitting, unused, for 3 – 6 months, or longer it may have lost its residual magnetic field required to build voltage. 12V Dynamic Field Flash SAFETY NOTE – The Dynamic Field Flash MUST be done with the gen-set running. Disconnect sensing &...
- Page 17 Pancake Generator Specifications Current Production Models - 3/2/16 Main Stator Exciter Exciter Standard Main Model No Stator Rotor Rotor Ω L-L Res. Ω Ω Ω (Series) 331CSA / CSB3018 SE350EL 23.7 0.49 0.50 1.48 332CSA / CSB3020 SE350EL 24.5 0.49 0.395 1.58...
- Page 18 This information should be read together with all other printed information supplied by Marathon. For more information contact: Marathon, Regal Beloit America, Inc., 100 E. Randolph St., Wausau, WI 54401 Phone: 715-675-3359 or Fax: 715-675-8026...
- Page 19 NOTES...
- Page 20 100 E. Randolph Street (54401) A Regal Brand PO Box 8003 Wausau, WI 54402-8003 U.S.A. PH: 715-675-3359 FAX: 715-675-8026 www.marathonelectric.com ©2015 Regal Beloit Corporation MANUAL GPN016 7892J-NP/???/07-15/??? Printed in the U.S.A.
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Is there a front bearing ( engine end)
The document states that "Single bearing generators must have their rotor assembly properly secured," which suggests that the Regal Marathon Electric Pancake generator has a single bearing configuration. This implies that there is no front bearing at the engine end.
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