Question { L&T, 292792 }

What is the Difference Between MCCB & ACB & VCB

Answer

MCCB is Molded Case Circuit Breaker.Rated current up to
1000 A.Trip current may be adjustable.Thermal or thermal-
magnetic operation.

ACB is Air Circuit Breaker.Rated current up to 10,000 A.
Trip characteristics often fully adjustable including
configurable trip thresholds and delays.Usually
electronically controlled—some models are microprocessor
controlled.Often used for main power distribution in large
industrial plant,where the breakers are arranged in draw-
out enclosures for ease of maintenance.

VCB is Vacuum Circuit Breaker.Rated current up to 3000 A.
These breakers interrupt the arc in a vacuum bottle.These
can also be applied at up to 35,000 V. Vacuum circuit
breakers tend to have longer life expectancies between
overhaul than do air circuit breakers.

Question { 15976 }

what is the difference b/w bus reactor and line reactor?

Answer

BUS REACTOR:-(Electricity) An air-core inductor connected
between two buses or two sections of the same bus in order
to limit the effects of voltage transients on either bus.
Reduce fault current.Bus reactors a devise installed in a
bus to maintain system voltage when the load on the bus
changes by releasing reactive power as usable power to
bolster the voltage.
LINE REACTOR:- A line reactor is placed in line at point of
use or just after a transformer to maintain a stable
amperage to the user, capacitor.