PI Manufacturing AC generators

Fig. 14.

ROTATING RECTIFIER ASSEMBLY

Contents

Main SAFETY PRECAUTIONS ELECTRICAL SHOCK CAN CAUSE SEVERE PERSONAL INJURY OR DEATH. ! Danger ! FOREWORD ELECTROMAGNETIC COMPATIBILITY ! CONTENTS Page SECTION 1 INTRODUCTION 1.1 INTRODUCTION 1.2 DESIGNATION 1.3 SERIAL NUMBER LOCATION AND IDENTITY NUMBER LOCATION SECTION 2 PRINCIPLE OF OPERATION 2.1 SELF-EXCITED AVR CONTROLLED 2.2 PERMANENT MAGNET GENERATOR (PMG) EXCITED - AVR CONTROLLED GENERATORS SECTION 3 APPLICATION OF THE GENERATOR Page SECTION 4 INSTALLATION - PART 1 4.1 LIFTING 4.2 ASSEMBLY 4.2.2 TWO BEARING GENERATORS 4.3 EARTHING ! 4.4 PRE-RUNNING CHECKS 4.4.1 INSULATION CHECK 4.4.2 DIRECTION OF ROTATION 4.4.3 VOLTAGE AND FREQUENCY 4.4.4 AVR SETTINGS 4.4.4.1 TYPE SX460 AVR 1. Frequency selection Page Page Page 4.7.1.2 EXC TRIP (Excitation Trip) AVR Types MX341 and MX321 4.7.1.3 OVER/V (Over Voltage) AVR Type SX421, MX321 4.7.1.4 TRANSIENT LOAD SWITCHING ADJUSTMENTS AVR Types SX421, MX341 and MX321 DIP AVR Types SX421, MX341 and MX321 DWELL AVR Type MX321 Page SECTION 5 INSTALLATION - PART 2 5.1 GENERAL 5.3 EARTHING 5.4 PROTECTION SECTION 6 ACCESSORIES 6.2.1.1 SETTING PROCEDURE 6.2.2 ASTATIC CONTROL 6.3 MANUAL VOLTAGE REGULATOR (MVR) - MX341 and MX321 AVR 6.4 OVERVOLTAGE DE-EXCITATION BREAKER MX321 AVR Page 6.6 POWER FACTOR CONTROLLER (PFC3) SECTION 7 SERVICE AND MAINTENANCE 7.1 WINDING CONDITION Guidance of Typical Insulation Resistance New Machines Page Blown Air Drying TYPICAL DRYING OUT CURVE 7.3 AIR FILTERS 7.3.1 CLEANING PROCEDURE Danger ! 7.4 FAULT FINDING 7.4.2 SX440 AVR - FAULT FINDING 7.4.3 SX421 AVR - FAULT FINDING 7.4.4 TRANSFORMER CONTROL - FAULT FINDING Page 7.4.7 RESIDUAL VOLTAGE CHECK 7.5 SEPARATE EXCITATION TEST PROCEDURE 7.5.1 GENERATOR WINDINGS, ROTATING DIODES and PERMANENT MAGNET GENERATOR (PMG) CHECKING PMG Rectifier Diodes Replacement of Faulty Diodes Surge Suppressor Main Excitation Windings 7.5.1.2 UNBALANCED MAIN TERMINAL VOLTAGES 7.5.2.2 TRANSFORMER CONTROL Two phase transformer Three phase transformer Rectifier units - Three phase and single phase 7.5.3.3 REMOVAL OF ENDBRACKET AND EXCITER STATOR 7.5.3.4 REMOVAL OF THE ROTOR ASSEMBLY TWO BEARING GENERATORS ALL SINGLE BEARING GENERATORS 7.6 RETURNING TO SERVICE SECTION 8 SPARES AND AFTER SALES SERVICE 8.1 RECOMMENDED SPARES AVR Controlled Generators Transformer Controlled Generators (UC22 Only) PARTS LIST TYPICAL SINGLE BEARING GENERATOR Page PARTS LIST TYPICAL TWO BEARING GENERATOR Page PARTS LIST TYPICAL TWO BEARING (SERIES 5) GENERATOR N.D.E. Non Driven End D.E. Driven End Page Page A.C. GENERATOR WARRANTY SUBSIDIARY COMPANIES