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Summary of Contents for Marathon MAGNAPLUS ATEX Zone 2
- Page 1 Generators ATEX Zone 2 IECEx Zone 2 Atmospheres 282 – 287 Frame Installation, Operation, and Maintenance Manual Regal Beloit America, Inc. P.O. Box 8003 Wausau, WI 54402-8003 www.marathonelectric.com...
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Page 2: Table Of Contents
shaft is rotating, and proceed accordingly. Residual voltage is CONTENTS present at the generator terminals and at the automatic Safety voltage regulator panel connections even with the regulator Receiving and Storage fuse removed. Caution must be exercised or serious injury or Principles of Operation death can result. - Page 3 UL CERTIFICATIONS ATEX: Generators with the mark on the nameplate are certified by DEMKO (Certificate 18ATEX2100) and comply with the ATEX Directive 2014/34/EU and the following standards: CENELEC EN 60079-0:2012+A11:2013 CENELEC EN 60079-7:2015 IECEx: Generators marked with the phrase “IECEx UL 18.0102X” are certified by UL LLC (Certificate IECEx UL 18.0102X); Generators marked with the phrase “IECEx UL 18.0099X”...
- Page 4 Table 2: IECEx Nameplate Markings Line 1 IECEx UL 18.0102X Reference to IECEx Scheme Name of Body Performing IECEx Certification Year of Original Certificate Issuance Certificate Number Line 2 200°C (T3) Explosion Protection Marking Specific Protection Type (ec = non-sparking) Gas Group Temperature Class (T3 = 200°C) Equipment for explosive gas atmospheres having an “enhanced”...
- Page 5 CSA CERTIFICATIONS ATEX: Generators with the mark on the nameplate are certified by Sira Test & Certification Ltd (Certificate 11ATEX4394X) and comply with the ATEX Directive 94/9/EC and the following standards: BS EN 60079-0:2014 “Explosive Atmospheres Part 0: Equipment - General Requirements” BS EN 60079-15:2010 “Explosive Atmospheres Part 15: Equipment Protection by Type of Protection “N”...
- Page 6 Table 2: IECEx Nameplate Markings Line 1 IECEx 0033X Reference to IECEx Scheme Name of Body Performing IECEx Certification Year of Original Certificate Issuance Certificate Number Line 2 T3 (200°C) Explosion Protection Marking Specific Protection Type (nA = non-sparking) Gas Group Temperature Class (T3 = 200°C) Equipment for explosive gas atmospheres having an “enhanced”...
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Page 7: Principles Of Operation
PRINCIPLES OF OPERATION ® FIGURE 1 -- MagnaPLUS Circuit Diagram FIGURE 2 -- Typical MagnaPLUS ® Layout Diagram ‐ SB504ATEX Rev 12/6/2018 ... -
Page 8: Installation
(field) is not powered. This AC voltage is rectified to DC Consult Marathon Electric for further information relative to by the rotating rectifier assembly and fed directly to the main nonlinear loads. - Page 9 A bearing life calculation should be Although the generator has been carefully inspected performed. Marathon Electric recommends a minimum B-10 and tested in operation prior to shipment from the life of 40,000 hours. If cog type belts are used, a vibration may...
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Page 10: Wiring Connections
IP54. To will be supplied by Marathon Electric upon request. minimize the transmission of vibration, it is essential that flexible conduit or cable be used for all electrical entrance to the generator conduit box. - Page 11 LOW (PARALLEL) WYE CONNECTION VOLTAGE (LOW WYE) L-L0 12 Lead L - L L - L0 HIGH (SERIES) DELTA CONNECTION VOLTAGE (HIGH DELTA) L-L0 L-L0 L-L0 T8 T5 L3 T11 T2 L2 LOW (PARALLEL) DELTA CONNECTION 12 Lead VOLTAGE (LOW DELTA) L - L L - L ...
- Page 12 DOUBLE DELTA -- SINGLE PHASE CONNECTION VOLTAGE (DOUBLE DELTA) L-LO Note: Single phase KW/KVA ratings are approximately equal to 50% of the generator’s three phase ratings. L - L0 L - L0 L - L LOW ZIG ZAG -- SINGLE PHASE (PARALLEL) CONNECTION VOLTAGE (LOW ZIGZAG) L-LO 12 Lead...
- Page 13 DEDICATED SINGLE PHASE CONNECTION HIGH VOLTAGE - SERIES CONNECTED VOLTAGE (DEDICATED) SINGLE PHASE CONNECTION - SINGLE VOLTAGE PARALLEL VOLTAGE 60 HZ 50 HZ Note: For 120 volt only service. Use an AVC63-4A or a VR63-4C voltage regulator to replace the standard SE350 regulator.
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Page 14: Operation
OPERATION START-UP The following procedure should be followed when starting the generator set for the first time. PRE-START INSPECTION The generator output must be disconnected from the Before starting the generator for the first time, the following load. Be sure that the main circuit breaker or fused inspection checks are recommended: disconnect is in the open position. -
Page 15: Maintenance
If the reading drops below the minimum, the generator should be cleaned and dried at an authorized service shop. Consult Marathon Electric for more information. TO MINIMIZE THE LIKELIHOOD OF ELECTRO- STATIC BUILDUP, DO NOT CLEAN OR WIPE... -
Page 16: Testing
Forced Air that the generator’s air gaps (main rotor and exciter) are free Another method to dry the generator is to run the set with no from obstructions. If possible, rotate the generator manually excitation (see startup procedure item #2). The natural flow of to ensure free rotation. -
Page 17: Service
Insulation Test When the positive test probe is connected to the diode's anode and the negative test probe is connected to the diode's cathode (forward biased), the diode will switch on and Insulation resistance is a measure of the integrity of the conduct electricity (Figure 4). - Page 18 Reassembly note: Before the bearing bracket is seated against the frame, a threaded rod may be used to help align the inner bearing cap with the bearing bracket. Failure to remove the exciter field leads from the automatic voltage regulator during flashing procedures may destroy the regulator.
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Page 19: Troubleshooting
FIGURE 5: ROTATING RECTIFIER ASSEMBLY RETURNED GOODS TROUBLESHOOTING Contact Marathon Electric Manufacturing Corporation for This section is intended to suggest a systematic approach to authorization before returning any product. We can not be locating and correcting generator malfunctions. The section is responsible for any items returned without authorization. - Page 20 WARNING HIGH VOLTAGES MAY BE PRESENT AT THE GENERATOR’S TERMINALS WHEN THE UNIT IS RUNNING. SOME ACCESSORY EQUIPMENT SUCH AS SPACE HEATERS MAY BE ENERGIZED FROM AN OUTSIDE POWER SOURCE WHEN THE UNIT IS AT REST. TOOLS, EQUIPMENT, CLOTHING AND YOUR BODY MUST BE KEPT CLEAR OF ROTATING PARTS AND ELECTRICAL CONNECTIONS.
- Page 21 GENERATOR PRODUCES LOW VOLTAGE WHEN LOAD APPLIED CAUSE CHECK AND REMEDY Excessive load Reduce load. The load on each leg should be evenly balanced, and rated current should not be exceeded on any leg. Large motor starting or low Motor starting currents are too large for the generator. When starting multiple motors, load power factor sequence the motors and start the largest motors first.
- Page 22 Distorted voltage waveform Analyze load. Excessive SCR (thyristor) loading will cause distortion. Some equipment may be sensitive to distorted waveforms. Refer to Marathon Electric.. Improper generator voltage or frequency Check name plates of devices comprising the load. Compare required voltage and frequency with that of the generator.
- Page 23 PARTS LIST – SINGLE BEARING Typical Generator Cross Section Reference Part Name Reference Part Name Number Number End Bracket Main Stator Bearing Main Rotor O-ring Rotor Integral Keyway Rectifier Assembly Air Intake Cover Mounting Adapter (SAE) Exciter Rotor Shaft Exciter Stator Drive Hub Fixed Terminal Block Drive Disk (SAE)
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Page 24: Parts List & Recommended Spare Parts
PARTS LIST – DUAL BEARING, HYDRAULIC Typical Generator Cross Section Reference Part Name Reference Part Name Number Number End Bracket Main Stator Bearing (nondrive end) Main Rotor O-ring Rotor Integral Keyway Rectifier Assembly Air Intake Cover End Bracket (drive end) Exciter Rotor Bearing (drive end) Exciter Stator... - Page 25 PARTS LIST – DUAL BEARING Typical Generator Cross Section Reference Part Name Reference Part Name Number Number End Bracket Main Stator Bearing (nondrive end) Main Rotor O-ring Rotor Integral Keyway Rectifier Assembly Air Intake Cover End Bracket (drive end) Exciter Rotor Bearing (drive end) Exciter Stator Shaft...
- Page 26 Regal Beloit America, Inc. P.O. Box 8003 Wausau, WI 54402-8003 USA www.marathonelectric.com SB504ATEX Rev. 12/6/2018 ...
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