What is the Difference Between MCCB & ACB & VCB
Answer Posted / ebrahim.p.b
MCCB-moulded case circuit breaker
ACB-air-blast circuit breaker
VCB-vaccum circuit breaker
their functions are same.......
ACB-These breakers employ a high pressure airblast as an arc
quenching medium.The contacts are opened in a flow of
airblast established by the opening of blast valve.The air
balst cools the arc and sweeps away the arcing product to
the atmosphere.This increases the dielectric strength of the
medium between contacts and prevents from reestablishing the
arc.Consequently the arc is extinguishedand flow of current
is interrupted.
VCB-in such breakers vaccum is used as the arc quenching
medium. Since vaccum offers highest insulating strength,it
has far superior arc quenching properties than any other medium.
Is This Answer Correct ? | 15 Yes | 2 No |
Post New Answer View All Answers
What is the effect on 3phase induction motor if current setting knob of DOL kept at minimum current?
What is the selection process of breakers. Can any one please give a formulation on same?
When a single pase capacitor run motor- run on 230vac and Case(1)run with 8 Mfd 250 vac.capacitor , Case( 2) run with 8 Mfd 400vac capacitor. What is difference between both case regarding power ,efficiency etc?
What is the abbreviation of NGT panel
Why colled 440V to 3-phase supply.
Can you explain about Restricited earth fault protection scheme
how flow current in 220 kv line to line
In the N-series schneider reclosers. What is the difference between current during fault time and current at tripping? This appears in the Event log in an event of a trip out.
What is VSCF windelectrical system?
why three phase capacitor takes unbalanced current in capacitor bank?
hi if anybody got model questions for cpcl Grade'A' electrical engineer position.send it to my mail please krishkumar22@gmail.com
How should i design a 1ph & 3 ph transformer. Kindly let meknow all steps and formulaes related to design from scratch.
Post possible questions for Power Factor Panel FAT / SAT
How to design a Unit auxiliary transformer for a power house having a unit of 65 MW and Generating voltage of 11 KV and Secondary voltage of 433V
how to flameproof electrical motor on the shaft?