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low is below 600V
medium 600 to 2500V
High above 2500V
usually medium and high voltage equipment is called switchgear
the current is monitored and 3 shorts within 10 minutes will open the switch
overloads are usually 200% for over 20 minutes
but the big stuff is programable
Wiki User
∙ 13y ago
Wiki User
∙ 13y agofor 15A contact resistance will be 166.66 ohm
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What is the difference of a Circuit Breaker from an Air Circuit breaker?
They are completely different. A moulded-case circuit breaker is a low- or medium-voltage device, whereas an air circuit breaker is a very large circuit breaker designed for use in high-voltage transmission/distribution substations.
Can 11kv breaker be installed on 6.6kv line?
Yes. But,circuit breaker are usually rated in terms of current they can interrupt,not the voltage.
What happens if a circuit has no resistance?
Then the voltage in will equal the voltage out. The purpose of a resistor is to reduce the amount of electrical flow of current. You 'short out' the supply and blow a fuse/circuit breaker.
For voltage drop calculation you must use the current of the circuit breaker or the normal currents?
For voltage drop calculation you must use the current of the load and the distance of the load from the supply source. The circuit breaker is then used to limit the current to the rating of the wire that feeds the load.
An example series circuit might be what?
A voltage or current source in series with a circuit breaker or fuse in series with a switch in series with a light bulb.
What is a Circuit breaker and explain type circuit breakers?
A circuit breaker is a switching device which can make,brake and carrying (or trip the circuit) that specified over currents for a small interval of time . There is a different types of Circuit Breaker's are there 1.According to their arc quenching media these are divided into 4 types a) Oil circuit breaker b) Air blast circuit breaker c) SF6 circuit breaker d) vacuum circuit breaker 2. According to their services the circuit breaker can be divided as a) Outdoor Circuit Breaker b) Indoor Breaker 3. According to the operating mechanism of circuit breaker they can be divided as a) Spring operated Circuit Breaker b) Pneumatic Circuit Breaker c) Hydrolic Circuit Breaker 4. According to the voltage level of installation these are divided into 3 types a) High Voltage Circuit Breaker b) Medium Voltage Circuit Breaker c) Low Voltage Circuit Breaker.
What is the difference of a Circuit Breaker from an Air Circuit breaker?
They are completely different. A moulded-case circuit breaker is a low- or medium-voltage device, whereas an air circuit breaker is a very large circuit breaker designed for use in high-voltage transmission/distribution substations.
What is the role of a breaker in a circuit?
the breaker makes sure that nothing in the circuit is damaged by an increased amount of amperage or voltage
What are the three main types of high voltage switching gear met with in industrial installations?
High voltage switch gear operates in the voltage range of 36 kV and above. Minimum oil circuit breaker, air blast circuit breaker and SF6 (Sulphur hexafluoride) circuit breaker are the three mostly used disconnects for high voltage switchgear.
Do you have a circuit breaker which operates for one millon volts?
Circuit breakers operate on current not voltage.
High voltage will trip a circuit breaker?
A higher voltage means that a higher current will flow in the same load. It is the current that causes the breaker to trip.
Where is medium trip circuit breaker used?
on safety related loads
What is a mcb and what is it used for?
mcb is master circuit breaker. it is used in the circuit for the protection of equipments from over voltage.
What is RRRV in power plants?
Rate of Rise of Re-striking Voltage is a voltage which is found when fault occurs in a power circuit protected by Circuit Breaker. This voltage may be twice the system voltage.
Where is the circuit breaker for a hot water heater?
The best way to determine which circuit breaker is for the water heater is with a voltage meter, It is suppose to be only one circuit breaker, but in a faulty application it could be two breakers
What is the requirement for energizing a 120 volt circuit breaker?
Before energizing a breaker for a circuit, the circuit has to be clear of any short circuits or grounds. This can be accomplished by the use of a megger on the correct voltage setting.
What is miniature circuit breakers?
miniature circuit breaker or MCB in low voltage electrical network instead of fuse.
