Nidec LSA 52.3 - Short Circuit Capacity of the Terminal Box

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Electric Power Generation

Installation and maintenance

5382 en - 2022.11 / h

LSA 52.3 / LSA 53.2 / LSA 54.2

Industrial Range Alternators

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7.1.3 Short circuit capacity of the terminal box

Main Page

Table of Contents2
General Information4
Introduction4
Safety Notes4
Conditions of Use4
Generalities4
Vibration Analysis4
Short-Circuit Capacity4
Object Projection Risk5
General Description5
Generator (Arep)5
Excitation System5
Description of Sub-Assemblies5
Stator5
Stator of the Electric Machine5
Excitation Field Winding6
Stator Protection6
Heating Resistance6
Stator Winding Temperature Sensor6
Stator Air Temperature Probe6
Bearing Vibration Sensor6
Rotor7
Pole Wheel (Laminated)7
Excitation Armature7
Fan (Machines: IC 0 A1)7
Rotating Diode Bridge7
Balancing (Single Fan Machine)7
Terminal Box8
Description (on Damper Buffers)8
Automatic Voltage Regulator (AVR)8
Nameplates8
Main Nameplate8
Lubrication Nameplate8
Rotation Direction Nameplate8
Roller-Bearing8
Description of Roller-Bearings8
Bearing Protection Devices8
Air Filters9
Transport Locking System9
General Information9
Machines with Bearings9
Double Roller Bearing Machine9
Single Roller Bearing Machine9
Installation10
Transport and Storage10
Transportation10
Warehouse Storage10
Storage in Maritime Packaging10
Unpacking and Installation10
Roller Bearing Storage Measures10
Uncovered Machinery Storage Measures10
Installation of the Machine11
Coupling Assembly (Double-Bearing Machine Only)11
Stator Attaching11
Machine Alignment11
General Information Concerning the Alignment11
General Information11
Shaft Elevation Caused by Heat Rise11
Elevation of the Shaft of a Roller Bearing Machine11
Inspection of the Generator before Alignment11
Alignment Procedure with the "Double Concentricity" Method11
Alignment of a Double-Flanged Bearing Machine12
Machines Without Axial Play (Standard)12
Electrical Connections13
General Information13
Phase Order13
Standard Units; IEC13
Upon Request; NEMA14
Insulation Distances14
Added Products in the Terminal Box14
Start-Up15
Electrical Start-Up Inspection15
General Information15
Insulation of the Winding15
Electrical Connections15
Parallel Operation15
Definition of Parallel Operation15
Possibility of Parallel Operation15
Parallel Coupling15
Mechanical Start-Up Inspection15
Terminal Box Start-Up16
Vibrations16
Start-Up Sequences16
Machine Stopped Checks16
Machine Running Checks16
Rotor Speed Ramp-Up (Standard Machine)16
Checks of Machine Running Without Excitation16
Checks of Excited Machine Running with no Load16
Generator and Site Safety Parameter16
Checks of Machine Running under Full Load Checks16
Generator Start-Up Checklist17
Maintenance and Servicing19
General Information19
Preventive Maintenance Programme20
General Information20
Stator20
Rotor20
Terminal Box20
Roller Bearing21
Rubber Dampers21
Filters21
Protection Devices21
Air Gap Check22
General Information22
Double-Bearing Machine22
Bearings22
Cleaning of Old Bearing Grease22
Cleaning of the Bearing Assembly Area23
Bearing Disassembly23
Bearing Reassembly23
Lubricants24
Greases24
Air Filter24
Cleaning24
Air Filter Cleaning Frequency24
Air Filter Cleaning Procedure24
Screw Tightening24
General Information24
Steel Screws in Steel Tapping25
Plugs25
Electrical Contact25
Rotating Diodes25
Synthetic Parts25
Electrical Measuring Instruments25
Instruments Used25
Insulation Check of Windings25
General Information25
Insulation Measurement26
Polarisation Index26
Rotary Diode Bridge Test27
Coil Cleaning27
General Information27
Coil Cleaning Products27
Cleaning Operation27
Winding Drying28
General Information28
Drying Method28
Drying Generator in a Stopped Position28
Drying Generator in Rotation28
New Varnish Application29
Terminal Box29
Spare Parts29
Mechanical Defects30
Electrical Faults31
Typical Assemblies and Drawings32
Machine Section Views32
Machine Type A52.332
Machine Type A53; A5434
Roller Bearing Mounting35
Machines A52, A53 and A54; Standard35
Standard Safety Regulations36
European Regulations and Directives36
Low Voltage Machines36
Medium and High Voltage Machines37
Short Circuit Capacity of the Terminal Box38

Nidec LSA 52.3 - Short Circuit Capacity of the Terminal Box

Table of Contents

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