Voltage stabilizers are manufactured to exacting quality standards, however,in the unlikely Event there may be some problems, therefore proper operation & maintenance could be enhanced the life span of servo voltage stabilizer, with regular and periodical maintenance schedule we are able to get reliable output as well as better efficiency of equipment. Here we are giving fault diagnostic chart which could be useful in diagnoses the fault in servo voltage stabilizer so that we can take necessary corrective and preventive measures.
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Sr. No
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Symptom
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Probable Causes
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Remedial Action
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1
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SVS not working in AUTO Mode
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1.Servo Card Malfunctioning
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Replace Servo Card
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2.T Type Transformer Malfunctioning
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Replace Transformer
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2
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SVS not working in MANUAL Mode
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1.Carbon Brush Broken/Setting Disturb
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Replace/Adjust Carbon Brush
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2.Gear Broken/Setting Disturb
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Replace/Adjust Gear
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3.R-C Set Defective
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Replace
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4.Fuse Open
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Change Fuse
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3
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Abnormal Temp. Meter Reading
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1.Inverted Connection/Faulty
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Interchange Connection/Replace
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2.Fault in Sensor
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Replace Sensor
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4
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Input/ Output Voltage not Being Display
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1.Open Fuse
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Replace fuse
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2.Push V-in Button Faulty
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Setting
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3.Voltmeter Defective
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Replace Card
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4.24-Pin Connector Loose
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Tighten the Connector
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5
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Output Voltage Unbalanced
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1.Pot Setting Disturbed
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Setting
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2.Neutral Disconnected
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Check the Neutral
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3.Input Voltage Out of Range
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Check Input Voltage
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6
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Tripping Frequently
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1.Input Voltage Out of Range
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Check Input Voltage
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2.Loose Connection on MCCB
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Tighten the Connection
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3.MCCB Defective
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Replace
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4.SVS Overload
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Reduce Loading as per Capacity
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5.Neutral is not Proper
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Check the Neutral
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7
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Abnormal Noise
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1.Gear Broken
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Replace the Gear
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2.Carbon Brush Defective
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Check Carbon Brush for Adjustment or Replacement.
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3.Motor is Continuously ON
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Adjust/Replace Limit Switch
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8
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Humming Noise
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1.Overloading
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Reduce Loading as per Capacity
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2.Input Voltage Out of Range
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Check Input Voltage
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3.Loose Neutral
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Check the Neutral/Phase Connection
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RECOMMENDED MAINTENANCE SCHEDULE:
Here we are showing some tips for maintenance for servo voltage stabilizer which will be useful in enhance the life span as well as also improve the efficiency of equipment.
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S. No.
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Inspection
Frequency |
Items to be inspected |
Inspection Notes |
Action reqd. if inspection shows unsatisfactory conditions |
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1
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Monthly
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i. Oil level in SVS
ii. Connections
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Check Oil level
Check tightness
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If low, top up with dry oil. Examine SVS for leaks If loose, tighten
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2
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Quarterly
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i. Terminals
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Examine for cracks and dirt deposits.
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Clean or replace
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3
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Half-yearly
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Gasketted Joints, Gauges and general paint work
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Check of moisture under cover inspects.
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Improve ventilation, check oil.
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4
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Yearly
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i. Oil in SVS
ii. Megger Value
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Check for dielectric Strength
More than 10Mohm
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Take suitable action to restore quality of oil.If value is less than 10Mohm,
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