first of all what kinda person asks thiz stup. question???
-cyco.
acb means AIR CIRCUIT BREAKER ,& vcb means VACUUM CIRCUIT BREAKER
which year was the circuit breaker invented? was it year 1924 or year 1925?
In a vacuum breaker the moving contact and fixed contact are sealed inside a vacuum chamber. Electrons cannot flow in a vacuum, therefore as soon as the moving contact seperates from the fixed contact the arc meets an infinite resistance and is immediately extinguished. Because of this, the gap between the fixed and moving contacts when the breaker is open need only be a tiny amount.
Vacuum circuit breaker is used in railway applications and as it is used in the applications where current chopping phenomenon is more
Such a circuit breaker is a sealed unit (to preserve the vacuum), and relies on the concept that if there is no ionizable material between the contacts, there can be no arc. In practice, a sufficiently strong arc could ionize some of the metal of the contacts, but a well designed vacuum circuit breaker is quite useful for even moderately high voltages - at least into the hundreds of volts. The vacuum is of course built into the device at manufacture.
acb means AIR CIRCUIT BREAKER ,& vcb means VACUUM CIRCUIT BREAKER
"Air" and "Vacuum" describe how the breaker extinguishes the arcing current. An Air breaker opens far enough that the dielectric strenght of air is enough to extinguish the arc. A vacuum breaker's contacts are in a vacuum. Oil breakers use oil. SF6 breakers use SF6 gas to extinguish the arc.
SION Vacuum Circuit-Breaker
A vacuum circuit breaker is a high-voltage circuit breaker whose contacts separate within a vacuum dielectric. The vacuum contributes to extinguishing the resulting arc because ionisation cannot take place while the arc is stretched between the separating contacts.
A vacuum breaker uses a vacuum to extinguish the arc when interrupting a circuit, while a SF6 gas circuit breaker uses sulfur hexafluoride gas. SF6 gas circuit breakers can handle higher voltages and currents compared to vacuum breakers. SF6 gas circuit breakers are also more environmentally harmful due to the greenhouse gas SF6, while vacuum breakers are considered more eco-friendly.
which year was the circuit breaker invented? was it year 1924 or year 1925?
To reset a circuit breaker on a shop vac, first unplug the machine. Locate the circuit breaker on the power cord or the vacuum itself and press the reset button. If the breaker doesn't reset, check for any obstructions or issues with the vacuum that may be causing the problem.
In a vacuum breaker the moving contact and fixed contact are sealed inside a vacuum chamber. Electrons cannot flow in a vacuum, therefore as soon as the moving contact seperates from the fixed contact the arc meets an infinite resistance and is immediately extinguished. Because of this, the gap between the fixed and moving contacts when the breaker is open need only be a tiny amount.
By means of Megger Vidar or Vanguad VBT Series
Granville Woods
VCB is Vacuum Circuit Breaker. It is one of the type of Circuit breaker. In VCB arching chamber is vacuum instead of oil or such arc quenching media. Its function is to break the circuit automatically in case of fault or to isolate the circuit under normal situation also.
Vacuum circuit breaker is used in railway applications and as it is used in the applications where current chopping phenomenon is more