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It is the transient voltage that appears across the contacts of the circuit breaker at or near the zero current instant during arcing period. A high frequency transient voltage appears across the contacts and is caused by the rapid distribution of energy between the magnetic & electric field associated with the station & transmission lines of the system at the zero current. This transient voltage is known as restriking voltage.
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Define electrical panel board and what its purpose?
Answer for UK, Europe and countries running a 50 Hz supply service.A domestic power supply enters the property as a single-phase two-wire circuit with a large fuse or cut-out. The distribution panel splits the circuit off into several smaller circuits each with its own fuse or circuit breaker.A simple example in Europe would the nominal 230 v supply which would have a 60 amp fuse for a typical small property. The distribution panel would split that off into a 30 amp ring circuit, a 30 amp cooker circuit and a 10 amp lighting circuit. The advantage is that a fault in one circuit would blow only one of the fuses and would not disconnect the entire supply to the property.
What are the three basic electrical quantities?
It sounds like you are asking about current, voltage, and resistance - which are related by Ohms law. There are, however other electrical quantities such as charge, inductance and capacitance.
If an insulator with a lamp is connected in a electrical circuit The switch is turned-on What happens?
If an insulator with a lamp is connected in an electrical circuit and the switch is turned on, the lamp will not light up. Insulators do not allow the flow of electric current, so the circuit will not be completed, and no electricity will reach the lamp to cause it to light up.
What are Technical parameters of vacuum circuit breaker?
Technical parameters of a vacuum circuit breaker (VCB) include its rated voltage, rated current, and breaking capacity, which define its ability to interrupt fault currents. Other important parameters are the insulation level, making and breaking time, and the number of operations it can perform before maintenance is required. Additionally, the design pressure of the vacuum chamber and the operational mechanism type (spring-operated or hydraulic) are crucial for performance and reliability. These parameters ensure the VCB operates effectively in various electrical systems, providing protection and fault isolation.
How do you define a pole in circuit breaker?
A pole In a circut breaker refers to the number of circuts it controls, single pole only controls one, double controls 2 at same time
Define voltage in electrical?
Voltage (of a circuit) as defined in the NEC: n. The greatest root-mean-square(rms) (effective) difference of potential between any two conductors of the circuit concerned. Voltage as defined by Webster's: n. Electromotive force or potential difference, usually expressed in volts.
Define the puncture voltage?
whta is puncture voltage
Define generator short circuit ratio?
Checked Stephen J. Chapman's Electric Machinery Fundamentals page 287. It says: Short Circuit Ratio (SCR) for the synchronous generator is the ratio of the field current required for the rated voltage at OPEN circuit to the field current require for the rated armature current at SHORT circuit.
Define rated impulse voltage?
Simply, the voltage which is withstand by the test object as an impulse is called as rated impulse voltage.
How you can reduce voltage of a transformer?
Number of turns in the secondary winding define the voltage. Change the number of turn to change the voltage.
What is an electrical isolator?
Something that doesn't let electricity throughAnswerAn isolator (UK terminology) or disconnector (US terminology) is a switch used to isolate a section of a circuit from any energised conductors, by presenting a visible break in the circuit. Isolators are not designed to break load currents (unless fitted with optional arc-breaking feature) or to break fault currents. In high-voltage systems, isolators are used in conjunction with circuit breakers -with the isolators opened after a circuit breaker has opened the circuit, and closed before the circuit breaker closes the circuit. For example, before one can perform maintenance work on, say, a high-voltage circuit breaker, the following sequence must be followed:the circuit breaker is opened, breaking the circuit.isolators located on either side of the circuit breaker are opened, presenting a visible break between the isolator and energised lines.temporary earth (ground) connections are applied to each side of the circuit breaker.barriers and warning signs are erected around the circuit breaker to define the permitted work area.a permit to work card, listing the work to be performed, and any potential hazards, is issued to the personnel who are to maintain the circuit breaker.
How would you define concurrency and recovery?
Concurrency is when computer science and the system works together. Recovery is taking the time to heal.
What is making capacity of a circuit breaker?
Hard to define... A four year old child has the strength to physically "make" a typical household circuit breaker, while a teen would be able to "make" a typical industrial circuit breaker. (The latter breaker being physically much larger than the former.) Circuit breakers have their "breaking capacity" rated in AMPS. A typical household breaker is rated at 20, 30 or 50 Amps. Industrial breakers might be rated at 500 amps or a thousand or even more. Hope this helps but if it didn't answer your question, please rephrase it and ask again.
Define rms reverse voltage of a diode?
A DIODE will breakdown at a certain reverse voltage if RMS VOLTAGE IS SPECIFIED THEN the actual voltage will be RMS volts times 1.41
Will the circuit be completed when Jesus comes according to Jehovah's Witnesses?
The word 'circuit' is not a Biblical word, so you will need to define what you mean by circuit.
Define the term regulation as applied to dc power supply?
change in load voltage or output voltage changes in load current
How do you define voltage regulator?
A voltage regulator is a part of the engine that keeps the vehicle from sending too much electricity through the engine from the battery.
