1. What Methods Are Used To Put Out The Arc In An Ac Circuit Breaker?
1) Error With High Resistance.
2) Low Resistance Or Zero Point Interruption Is Put Out Of Commission At The Natural Current Zero Of An Ac Wave And Is Kept From Happening Again By A Quick Accumulation Of The Contact Space's Dielectric Strength.
2. How Do You Define An Anti pump Relay?
A Provision Included Into The Circuit Breaker Or Reclose Scheme That Prevents The Circuit Breaker From Repeatedly Functioning In The Event Of A Permanent Fault If The Closure Impulse Is Longer Than The Protection Relay's And The Circuit Breaker's Working Durations.
3. How Can The Vacuum Level Inside The Vacuum Bottle Be Ensured?
1) Vacuum Gauge
2) By Using A High Voltage, Power Frequency Test.
4. What Crucial Examinations Or OCBs Need To Be Performed During Maintenance?
1) Examine The Insulation Resistance Between Each Pole's Phase And Ground.
2) Examine The Oil's Dielectric Strength And Level.
3) Examine The Mechanical Processes.
4) Squeaky Insulators.
5) Verify The Terminal For Simultaneous Connections And Contact Length.
6) Calculate The Resistance To Contact.
5. What Kinds Of Circuit Breakers Are There?
A) Miniature Circuit Breakers, Or MCBs.
B) Molded Case Circuit Breakers, Or MCCBs.
D) Oil Circuit Breaker, Or OCB.
D) Minimum Oil Circuit Breaker (MOCB).
F) Air Circuit Breaker, Or ACB.
F) Vacuum Circuit Breaker (VCB).
G) Sulfur Hexa Fluoride Circuit Breaker, Or SF6.
6. How Do You Perform The VCB's Annual Preventative Maintenance?
A) Obtain The Permit.
B) Transfer The Breaker's Load.
C) Turn The Breaker Off And Rack It Out.
D) Discharge The Spring Already.
E) Clean The V.C.B. Physically.
F) Examine And Clean The Finger Contact.
G) Lubricate The Mechanism After Inspecting It.
H) Rack The Breaker Into The Test Position;
I) Turn The Breaker On Electrically Three Times For A Trial;
J) Rack The Breaker Into The Service Position And Provide The Load;
K) Close The Permit.
7. How Is The Maintenance Of A.C.B. Carried Out?
A) Get A Work Permit;
B) Shift The Breaker's Load;
C) Rack Out The Breaker And Release The Spring;
D) Physically Clean The A.C.B.;
E) Open The Arc Check; And
F) Inspect And Clean The Fixed And Movable Contacts.
F) Examine And Clean The Finger Contacts;
G) Examine And Grease The Mechanism;
H) Rack The Breaker In The Test Position;
I) Electrically Turn The Breaker On And Off For Testing;
J) Rack The Breaker In The Service Position;
K) Energize The Breaker;
L) Close The Permit.
8. What Upkeep Is Necessary For Oil Circuit Breakers?
A) Examine Every Component That Supports The Circuit And Take Care Of The Arcing Contact.
B) Check The Oil And Replace It If Necessary.
C) Examine The Insulation For Any Potential Harm.
D) Examine The Tripping And Closing Mechanism.
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