Table Of Contents - Leroy-Somer R452 Installation And Maintenance Manual

Voltage regulator

Table of Contents

LEROY-SOMER

1 - Presentation of the R 452 .................................................................................................................. 4

1.1 - Application ................................................................................................................................ 4

1.2 - Description ............................................................................................................................... 4

1.3 - Electrical characteristics............................................................................................................ 5

1.3.1 - Operating diagram ....................................................................................................... 5

1.3.2 - Sensing ........................................................................................................................ 6

1.3.3 - Voltage accuracy ......................................................................................................... 6

1.3.4 - Voltage setting ............................................................................................................. 6

1.3.5 - Power supply ............................................................................................................... 6

1.3.6 - Output power ............................................................................................................... 6

1.3.7 - Quadrature droop (1F) ................................................................................................. 6

1.3.8 - Frequency/Underspeed ............................................................................................... 6

1.3.9 - Stability ........................................................................................................................ 8

1.3.10 - Limiting the excitation current Iex .............................................................................. 8

1.3.11 - Protection ................................................................................................................... 8

1.3.12 - Voltage build-up ......................................................................................................... 8

1.3.13 - Power usage .............................................................................................................. 8

1.3.14 - De-energising ............................................................................................................ 8

1.4 - Environment ............................................................................................................................. 8

2 - R 726: Regulation of power factor (2F) and mains voltage sensing (3F) ...................................... 9

2.1 - Potentiometers ......................................................................................................................... 9

2.2 - Operating diagram ................................................................................................................. 10

3 - Typical diagrams .............................................................................................................................. 11

3.1 - AREP 1F LV excitation ........................................................................................................... 11

3.2 - AREP 1F MV excitation .......................................................................................................... 12

3.3 - AREP 3F LV excitation ........................................................................................................... 13

3.4 - AREP 3F MV excitation .......................................................................................................... 14

3.5 - 1F LV shunt + booster excitation ........................................................................................... 15

3.6 - 1F LV PMG excitation ............................................................................................................ 16

4 - Commissioning ................................................................................................................................. 17

4.1 - For standalone regulation ...................................................................................................... 17

4.2 - For 1F regulation (parallel operation between alternators) .................................................... 17

4.3 - For 2F regulation (regulation of power factor) and 3F regulation (voltage match circuit) ....... 17

5 - Troubleshooting ............................................................................................................................... 19

5.1 - Checking the windings and rotating diodes using a separate excitation ................................ 19

5.2 - Static checking of the regulator .............................................................................................. 19

5.3 - Troubleshooting table ............................................................................................................. 20

5.3.1 - For 1F regulation, parallel operation between alternators ........................................ 20

5.3.2 - For 2F and 3F ............................................................................................................ 22

5.3.3 - Checking the alternator using a separate excitation .................................................. 22

5.4 - Replacing the regulator with a spare voltage regulator .......................................................... 22

INSTALLATION AND MAINTENANCE

VOLTAGE REGULATOR R452

CONTENTS

Ref. 3563 GB - 4.33 / a - 01.02