Thursday, May 22, 2014

OPERATION & MAINTENANCE OF SERVO VOLTAGE STABILIZER

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.



Sr. No
Symptom
Probable Causes
Remedial Action
1
SVS not working in AUTO Mode
1.Servo Card Malfunctioning
Replace Servo Card
2.T Type Transformer Malfunctioning
Replace Transformer
2
SVS not working in MANUAL Mode
1.Carbon Brush Broken/Setting Disturb
Replace/Adjust Carbon Brush
2.Gear Broken/Setting Disturb
Replace/Adjust Gear
3.R-C Set Defective
Replace
4.Fuse Open
Change Fuse
3
Abnormal Temp. Meter Reading
1.Inverted Connection/Faulty
Interchange Connection/Replace
2.Fault in Sensor
Replace Sensor
4
Input/ Output Voltage not Being Display
1.Open Fuse
Replace fuse
2.Push V-in Button Faulty
Setting
3.Voltmeter Defective
Replace Card
4.24-Pin Connector Loose
Tighten the Connector
5
Output Voltage Unbalanced
1.Pot Setting Disturbed
Setting
2.Neutral Disconnected
Check the Neutral
3.Input Voltage Out of Range
Check Input Voltage
6
Tripping Frequently
1.Input Voltage Out of Range
Check Input Voltage
2.Loose Connection on MCCB
Tighten the Connection
3.MCCB Defective
Replace
4.SVS  Overload
Reduce Loading as per Capacity
5.Neutral is not Proper
Check the Neutral
7
Abnormal Noise
1.Gear Broken
Replace the Gear
2.Carbon Brush Defective
Check Carbon Brush for Adjustment or Replacement.
3.Motor is Continuously ON
Adjust/Replace Limit Switch
8
Humming Noise
1.Overloading
Reduce Loading as per Capacity
2.Input Voltage Out of Range
Check Input Voltage
3.Loose Neutral
Check the Neutral/Phase Connection


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.



S. No.

Inspection

Frequency


Items to be inspected


Inspection Notes

Action reqd. if inspection shows unsatisfactory conditions

1


Monthly
i.  Oil level in SVS

ii.  Connections
Check Oil level

Check tightness
If low, top up with dry oil.  Examine SVS for leaks If loose, tighten
2
Quarterly
i. Terminals

Examine for cracks and dirt deposits.
Clean or replace
3
Half-yearly
 Gasketted Joints, Gauges and general paint work
Check of moisture under cover inspects.
 Improve ventilation, check oil.
4
Yearly
i.  Oil in SVS

ii. Megger Value
Check for dielectric Strength
More than 10Mohm        
Take suitable action to restore quality of oil.If value is less than 10Mohm,
In case any enquiry free feel to contact us at info@saielectricals.com or visit our website www.saielectricals.com

2 Comments:

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At December 5, 2014 at 1:43 AM , Blogger Sai Electricals said...

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