Marathon Electric Magna Plus 280-430 Frame Installation, Operation & Maintenance Manual

2, 2 CONTENTS Safety 2 Receiving and Storage 2 Principles of Operation 3 - 4 Installation 4 - 6 Wiring Connections 6 - 9 Operation 9 - 10 Maintenance 10 - 11 Testing 11 - 12 Service 12 - 14 Troubleshooting 14 - 17 Specifications 18 Parts List & Recommended Spare Parts 19 - 20 SA…

12, 12 Insulation Test Insulation resistance is a measure of the integrity of the insulating materials that separate the electrical windings from the generator’s steel core. This resistance can degrade over time or be degraded by contaminants: dust, dirt, oil, grease, and especially moistu…

13, Marathon Electric Magna Plus 280-430 Frame 13 CAUTION: Failure to remove the exciter field leads from the automatic voltage regulator during flashing procedures may destroy the regulator. 2. Connect the F+ and F- leads to the battery’s corresponding positive and negative terminals. This should be done using an appropriate length of lead …

11, 11 or the rotating rectifier assembly. Ensure that RPM is the same as initial test. 5. Monitor and record insulation resistance with a 500 volt mega-ohm meter. The minimum acceptable reading is 2 mega-ohms. If the reading drops below the minimum, the generator should be cleaned and dried at …

7, 7 LOW (PARALLEL) WYE CONNECTION L 2 T 7 T 10 T 1 T 4 L 1 L 3 T 5 T 2 T 11 T 8 T 6 T 3 T 12 T 9 L - L L - N VOLTAGE (LOW WYE) Hz L-L L-N 60 240 139 230 133 220 127 208 120 190 110 50 208 120 200 115 190 110 HIGH (SERIES) DELTA CONNECTION L 1 L 2 L 3 T 1 T 4 T 7 T 10 T 2 T 5 T 8 T 11…

14, 14 430 FRAME 280 / 360 FRAME A - Exciter Rotor Lead, B - Main Rotor Lead, C - Red (+) Suppressor Lead, D - Black (-) Suppressor Lead FIGURE 4: ROTATING RECTIFIER ASSEMBLY RETURNED GOODS Contact Marathon Electric Manufacturing Corporation for authorization before returning any product. …