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Summary of Contents for Nidec LEROY-SOMER R251
- Page 1 R251 110 0V 50Hz KNEE 47.5Hz LAM OFF SPECIAL KNEE 65Hz LAM OFF KNEE 57Hz 60Hz LAM OFF R251 Installation and maintenance...
- Page 2 Installation and maintenance Electric Power Generation 4092 en - 2024.01 / g R251 This manual concerns the alternator AVR which you have just purchased. We wish to draw your attention to the contents of this maintenance manual. SAFETY MEASURES Before using your machine for the first time, it is important to read the whole of this installation and maintenance manual.
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Page 3: Table Of Contents
Installation and maintenance Electric Power Generation 4092 en - 2024.01 / g R251 CONTENTS 1 - POWER SUPPLY ....................... 4 1.1 - SHUNT excitation system ....................4 2 - R251 AVR ...........................5 2.1 - Characteristics ......................5 2.2 - U/F function and LAM ....................5 2.3 - AVR options ........................ -
Page 4: Power Supply
Installation and maintenance Electric Power Generation 4092 en - 2024.01 / g R251 1 - POWER SUPPLY With a very simple conception, the SHUNT excitation alternator does not have a short 1.1 - SHUNT excitation system circuit capacity. The SHUNT excitation alternator is auto- The R251 is a R250 with a specific excita- excited with a R251 voltage regulator. -
Page 5: R251 Avr
Installation and maintenance Electric Power Generation 4092 en - 2024.01 / g R251 2 - R251 AVR The threshhold position and LAM function settings are done with the jumper. 2.1 - Characteristics - Storage: -55°C; +85°C Operating at 50 Hz: (U/F gradient) - Operation: -40°C;... -
Page 6: Avr Options
Installation and maintenance Electric Power Generation 4092 en - 2024.01 / g R251 2.3 - AVR options It is advised to use the “LAM” at 25% for load impacts > at 70% of the genset rated power. Potentiometer remote voltage adjustment, 1000 Ω... -
Page 7: Typical Effects Of The Lam
Installation and maintenance Electric Power Generation 4092 en - 2024.01 / g R251 2.5 - Typical effects of the LAM with a diesel engine or without a LAM (U/F only) 2.5.1 - Voltage Transient voltage drop (U/f) without LAM with Time 2.5.2 - Frequency Max speed drop... -
Page 8: Installation - Commisioning
Installation and maintenance Electric Power Generation 4092 en - 2024.01 / g R251 3 - INSTALLATION - 3.2.2 - Special type of use COMMISSIONING WARNING WARNING 3.1 - Electrical checks on the AVR - Check that all connections have been Excitation circuit E+, E- must not be left made properly as shown in the attached open when the machine is running: AVR... -
Page 9: Electrical Faults
Installation and maintenance Electric Power Generation 4092 en - 2024.01 / g R251 3.3 - Electrical faults Fault Action Effect Check/Cause The alternator builds up and its voltage is still correct when the - Lack of residual magnetism battery is removed The alternator builds up but its - Check the connection of the voltage Connect a new battery... -
Page 10: Spare Parts
Installation and maintenance Electric Power Generation 4092 en - 2024.01 / g R251 4 - SPARE PARTS 4.1 - Designation Description Type Code R251 AEM 110 RE 021 4.2 - Technical support service Our technical support service will be pleased provide additional information you may require. -
Page 11: Disposal And Recycling Instructions
Installation and maintenance Electric Power Generation 4092 en - 2024.01 / g R251 Disposal and recycling instructions All materials listed above need special committed limiting treatment separate waste from environmental impact of our activity. We reclaimable materials and should be continuously monitor production... - Page 12 Installation and maintenance Electric Power Generation 4092 en - 2024.01 / g R251...
- Page 13 Installation and maintenance Electric Power Generation 4092 en - 2024.01 / g R251...
- Page 14 Installation and maintenance Electric Power Generation 4092 en - 2024.01 / g R251...
- Page 15 Service & Support Our worldwide service network of over 80 facilities is at your service. This local presence is our guarantee for fast and efficient repair, support and maintenance services. Trust your alternator maintenance and support to electric power generation experts. Our field personnel are 100% qualified and fully trained to operate in all environments and on all machine types.
- Page 16 www.leroy-somer.com/epg Connect with us at: 4092 en - 2024.01 / g...
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