Download BrochureOverhauling & testing of Circuit breakers
Our Services
Checklist for Vaccum Circuit Breakers
- Operation of the Mechanism both Electrically and Manually.
- Verification of Required Alignments.
- Verification of Tripping and Closing Operations.
- Inspection and Testing of Tightness for All Control Cables and Isolating Contact Tightness.
- Checking Of All Insulation Resistance. (Closed and opened condition)
- Checking, Cleaning and Correcting the Alignment for Moving & Fixed Arcing Contacts
- Checking Of Spring Snatch Gap and Will Be Aligned Correctly (I.E. Should Not Be More Than 5(+/-1) Mm).
- Verification, Cleaning and Functional Checking of Circuit Breaker Is Done.
- Inspection, Cleaning and Checking of the Insulation Value for DC Operating Coils.
- Cleaning of Vacuum Circuit Breaker with CRC-226 and Removal of old grease and re-greasing the same with recommended grease
- Alignment Checks for Draw-In and Draw-Out Operations.
- Contact Resistance Testing, Time Testing, Vacuum Travel.
- Dismantling, Cleaning, Spare replacement, Making Fine Through by Applying Rubbing Articles, Also Applying Jellies for The Fixed Contacts and Interrupting Chambers and Re-Fixing the Same.
Checklist for Air Circuit Breakers
- Cleaning Up of Breaker with Cotton Waste and Then Cleaning By CTC/CRC-226
- Cleaning Of Old Grease and Applying New Grease for Moving Parts Except Electrical Parts
- Check The Tightness of All Parts of Breaker
- Checking The Reset Mechanism and Ensure the Tripping Through Push Button
- Check And Adjust the Freeness of Trip Release Rod
- Check And Clean the Condition of Arc Chute
- Check The Gap Between Fixed And Moving Contacts
- Check The Condition of Arc & Main Contacts
- Check The Condition and Alignment of Jaw Contact with Cradle Terminals
- Check And Ensure Proper Closing of All Poles Together
- Check The Condition of Control Wiring and Replace It If Necessary
- Check The Operation of Racking Mechanism and Lubricating the Same
- Check The Under Voltage / Shunt Release Coils
- Check The Tightness of All Control Wiring Terminals and CT Wirings
- Check The Auto Operation of Spring Charging Motor and Its Limit Switch
- Check The Continuity and Proper Changeover of Aux Contact Block Insulation resistance, Contact Resistance Testing, Time Testing and primary Injection testing with ETU test.
Check List for Sulphur Hexafluoride (SF6) Circuit Breakers
- Operation Of the Mechanism Both Electrical and Manual
- Verification, Cleaning and Functional Checking of Circuit Breaker & Apply Lubrication Grease at Required Place
- Testing And Checking of Auxiliary Contacts, Limit switches, Micro Switches, Alpha Plugs, Density Switch (Or) Pressure Gauge, Service & Mechanical Interlock.
- Verification Of Tripping & Closing Mechanism and Apply Lubrication Grease at Required Place
- Inspecting, Cleaning and Checking of The Insulation Value for Dc Operating Coils
- Verification Of Spring Charging Gears & Motor
- Inspecting And Testing of Tightness for All Control Cables and Conducts
- Check The Gas Pressure, If Low, Build Up Pressure
- Checking Of All Insulation Resistance
- Thorough Checking of Sf6 Gas in Pressure Gauge (Or) Density Switch
- Alignment Checking for Draw-In and Draw-Out Operations.
- Dismantling, Cleaning, Making Fine Through by Applying Rubbing Articles, Also Checking Conduct Spring Tension & Applying Jelly for Isolating Conduct & Re-Fixing the Same.
- Verification of All Required Alignments
- Contact Resistance Testing, Time Testing,
Checklist for Oil Circuit Breakers (BOCB & MOCB)
- Operation of the Mechanism both Electrical and Mechanical.
- Complete Checking, Cleaning, And Testing of Switchgear Through Testing and Checking of Contacts, Limit and Micro Switches, Alpha Plugs, Secondary Pins, Moving & Fixed Contacts, Interrupting Chambers & Other Insulated Parts.
- Verification of Required Alignments.
- Inspection and Testing of Tightness of All Control Cables and Isolating Contact Tightness.
- Verification of Tripping and closing Operations.
- Checking Of Insulation Resistance, Contact Resistance Testing, Time Testing.
- Checking Of Pole Assembly, Connecting and Conducting Live Terminals and The Drain Out Way Will Be Cleaned Fine.
- Verification, Cleaning and Functional Checking of the Circuit Breaker.
- Checking Of the Transformer Oil & Replacing the Same If Required.
- Alignment Checks for Draw-In and Draw-Out Operations.
- Checking Of Moving and Fixed Contacts.
- Dismantling, Cleaning, Making Fine Through Applying Rubbing Articles, Applying Jellies for the Fixed Contacts & Interrupting Chambers & Re-Fixing the Same.