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The low-set stage is a current with a definite time or inverse-time operation. The high-set stage has a definite time characteristic only without the inverse-time operation.
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How do you calculate DG set current?
To calculate the DG set current, you need the load current and the load voltage. To convert it into kilowatts it is divided by 1000.
Can you measure the emf of a cell with a voltmeter?
you can, but you will not get accurate answer as voltmeter consumes some current. so, potentiometer is used instead to measure emf ---- the potentiometer must be set to the expected emf from the cell before you put the zero detector in circuit if its set too high it will charge the cell too low it will load the cell perhaps if you dont know the voltage of the cell before you measure it you should get a hi impedance voltmeter(electrometer) to set the potentiometer as close as you can manage before you connect the zero detector
How does a current transformer work?
A current transformer is used in high voltage circuits where it is not possible to measure current directly. A CT is a step up transformer with only one turn in primary. There will be as many cores based on the purposes like metering, protection etc. The secondary of a CT should never be kept open circuited bcoz very high flux will be developed in the secondary and hence it may be damaged.
Why set an overload relay to full load current divide by root three in a star delta starter?
In a Wye/star system the overloads look at the phase to neutral/ground current; not phase to phase current. Which is always calculated as root three or 1.73205.............etc. Therefore the overloads have to be set to the phase to neutral/ground current.
What are the advantages of sinusoidal pulse width modulation?
1. Cheap to make. 2. Little heat whilst working. 3. Low power consumption. 4. Can utilize very high frequenzies (50-100 Khz is not uncommon.) 5. Very energy-efficient when used to convert voltages or to dim light bulbs. 6. High power handling capability 7. Efficiency up to 90%
What is the difference between high set and low set over current protection?
in on project that i saw for over current & earth fault protection high set setting had standard inverse curve and low set had l.t.i ( long time inverse) curve
With the lighting control set to an intensity setting low meduim or high what id the next step?
stobe control
Which setting is high on the rival crock pot?
its when its set high
How do you cook a chicken with an electric cooker what sign do i put it at?
Put it at "med high" or "high" setting to cook the raw chicken. Then, if you're going to make a stew or similar, set the sign at "low" or "med low" and add your other ingredients.
What is themeaning of setting?
of Set, The act of one who, or that which, sets; as, the setting of type, or of gems; the setting of the sun; the setting (hardening) of moist plaster of Paris; the setting (set) of a current., The act of marking the position of game, as a setter does; also, hunting with a setter., Something set in, or inserted., That in which something, as a gem, is set; as, the gold setting of a jeweled pin.
What is the literary meaning of setting?
of Set, The act of one who, or that which, sets; as, the setting of type, or of gems; the setting of the sun; the setting (hardening) of moist plaster of Paris; the setting (set) of a current., The act of marking the position of game, as a setter does; also, hunting with a setter., Something set in, or inserted., That in which something, as a gem, is set; as, the gold setting of a jeweled pin.
What is themeaning ofsetting?
of Set, The act of one who, or that which, sets; as, the setting of type, or of gems; the setting of the sun; the setting (hardening) of moist plaster of Paris; the setting (set) of a current., The act of marking the position of game, as a setter does; also, hunting with a setter., Something set in, or inserted., That in which something, as a gem, is set; as, the gold setting of a jeweled pin.
Why does a hairdryer on the 240 volt setting work in the US and does this mean the switch to change the voltage is faulty and it's not really operating on 240 volts?
Hair dryers usually have a HIGH and a LOW setting. The HIGH heating element is about 8 ohms. The LOW heating element is about 32 ohms. voltage (squared) / resistance = power (watts) 120*120 / 8 = 1800 watts ( HIGH ) 120*120 / 32 = 450 watts ( LOW ) When the voltage switch is set to 240 volts, ALL it does is limit the HIGH/LOW switch to the LOW setting. 240*240 / 32 = 1800 watts ( LOW ) 240*240 / 8 = 7200 watts ( HIGH ) (the heating element would burn out)
How do you calculate setting for over current earth fault relay setting?
An artificial neutral is crated in the CT of the line to be protected (for transmission lines) a CT is fixed in the neutral of the CT. if there is any imbalance in the 3 phase current then the relay will develop a difference in neutral.that can be sensed by the CT,then gives the trip command to relay
Setting the low pass filter on a car sub woofer?
LPF setting: typically 60-100Hz. Most use ~80Hz. Depending on the sub and the type of music You listen to, if set too low the sub won't put out the wanted frequencies; to high and power is wasted on higher frequencies.
How can a class A guitar amp be push pull?
Set the output tubes so that both of them conduct the whole cycle. Low plate voltage with high current.
True or false current is set too low or too high you should change the settings during welding?
I was always told not to so I say false.
