21
JAKSON & CO.
TROUBLE SHOOTING - ALTERNATOR
Description
Causes
Remedies
Decfective voltmeter
Check voltmeter and replace
Short circuit between phases
Check and ensure no short circuit
between phases.
Neutral earthing short with
body earthing
Check and rectify
Power cable faulty
Cehck and replace
Excitation circuit open
Check for loose connection
Incorrect excitation circuit
connection
Check for proper connection
Check for residual voltage. If residual
voltage is less than 2.5V(L-N) field
flashing required for few seconds.
Field fleshing procedure-
1. Disconnect regulator connections.
2. Connect 12/24V battery keeping F1
to positive and F2 to negative terminal
of excitor stator.
Grounded excitor field
Check and correct
Rotating rectifier faulty
Check rotating diodes
Fuse in AVR failed
Replace fuses
AVR Defective
Replace AVR
Rotating diode faulty
Check rotating diodes and replace
faulty diodes
Prime mover
Adjust prime mover
Prime mover speed is low
Adjust prime mover speed to rated speed
V-Trim pot incorrectly set
Adjust voltage by V-Trim pot in AVR
Low prime mover speed
Adjust prime mover speed
Loose or no connection to 'U'
terminals of the AVR
Check and correct
Incorrect voltage setting
Adjust voltage by V-Trim pot in AVR
AVR Defective
Replace AVR
Speed fluctuation of the prime
mover
Set the speed of the prime mover
Incorrect setting of stability pot Adjust stability pot in AVR
Leading load power factor
Correct the power factor
Load hunting,fluctuates
rapidly
Check and reduce the nonlinear load
High percentage of non-linear
load
Rectification, Correct percentage of
non linear load
Low residual voltage
No voltage from Alternator
Voltage developed but
excitation current is high
Low voltage build up
Voltage-High
Voltage fluctutation
Contd.
Содержание JakPower Kirloskar Koel Green EA10 G1
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