JCB Generator Self Regulating Alternator Service Repair Manual – PDF Download

Description

JCB Generator Self Regulating Alternator Service Repair Manual

Description:

JCB Generator Self Regulating Alternator Service Repair Manual

• All machinery can be hazardous. When a machine is correctly operated and properly maintained, it is a safe machine to work with. But when it is carelessly operated or poorly maintained it can become a danger to you (the operator) and others.
• In this manual and on the machine you will find warning messages. Read and understand them. They tell you of potential hazards and how to avoid them. If you do not fully understand the warning messages, ask your employer or JCB distributor to explain them.
• But safety is not just a matter of responding to the warnings. All the time you are working on or with the machine you must be thinking what hazards there might be and how to avoid them.
• Do not work with the machine until you are sure that you can control it.
• Do not start any job until you are sure that you and those around you will be safe.
• If you are unsure of anything, about the machine or the job, ask someone who knows. Do not assume anything.

Table of Contents:

JCB Generator Self Regulating Alternator Service Repair Manual

Care and Safety
Safety Check List 1-1
Safety – Yours and Others 1-1
Safety Warnings 1-1
Safety Check List 1-2
Principle of Operation
Self-Excited AVR Controlled 1-5
AVR Accessories 1-6
Identification 1-7
Key Component 1-8
Maintenance
JCB HM Range Alternators 1-9
Assessment of windings conditions after long periods of storage or inactivity
1-9
Assessment of current functioning (absence of anomalous noises or vibrations)
1-9
Mechanical checks of fastening bolts and, in particular, of electric connections
1-10
Internal and external cleaning of the generator 1-10
Maintenance and replacement (if necessary) of bearings 1-11
Generator versions HM160-200-250 1-12
Generator versions HM230-HM355 1-13
Cleaning of Air Filters (if available) 1-14
Cleaning of Windings 1-15
Replacement of Diode Bridge 1-18
Generator versions: HM160-200 Procedure to check the diodes of the exciter
rotor 1-19
Replacement of exciter Generator versions: HM160-250 1-21
Generator versions: HM280-355 1-22
Replacement of voltage 1-23
Check of Residual Voltage 1-25
DSR AVR 1-26
Cummins Range Alternators 1-29
Guidance of Typical Insulation Resistance [IR] Values 1-29
New Machines 1-29
At Generating Set Manufacturers Works 1-29
Generators in Service 1-29
Winding Condition Assessment 1-29
Procedure for Insulation Testing 1-30
Methods of Drying Out Generators 1-30
Typical Drying Out Curve 1-31
Air Filters 1-32
Fault Finding 1-32
SX460 AVR – Fault Finding 1-32
SX440 AVR – Fault Finding 1-33
SX421 AVR – Fault Finding 1-33
Transformer Control – Fault Finding 1-33
MX341 AVR – Fault Finding 1-34
MX321 AVR – Fault Finding 1-34
Residual Voltage Check 1-35
Separate Excitation Test Procedure 1-36
AVR Maintenance
HM Range Regulators 1-40
Electrical Connection 1-40
DSR Digital Regulator 1-45
Cummins Range 1-49
Direction of Rotation 1-49
Generator Set Testing 1-52
Connections Electrical
HM Range Alternators 1-57
Winding Resistance at 20°C Ambient 1-57
4 Poles 50Hz 3 Phase 1-79
4 Poles 50Hz 3 Phase 1-80
4 Poles 50Hz 3 Phase 1-81
4 Poles 50Hz 3 Phase 1-82
4 Poles 50Hz 3 Phase 1-83
4 Poles 50Hz 3 Phase 1-84
4 Poles 60Hz 3 Phase 1-85
4 Poles 60Hz 3 Phase 1-87
Ratings Book Glossary 1-89
Winding Configurations and Winding Numbers 1-89
Specification
Rating Definitions 1-91
Base Continuous Ratings 1-91
Peak Standby Rating (40ºc ambient temperature) 1-91
Peak Standby Rating (27ºC ambient temperature) 1-91
Winding Numbers Used On Cummins/Stamford Alternators 1-92
AVR Controlled 40°C Ambient Temperature Class H Temp Rise 125°C
(Base Continuous Rating) 1-93

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