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long travelling and cross travelling meter
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Why a 5amp. rating ammeter is connected to secondary side of current transformer?
The maximum current output of a CT is 5 amps. Connected to a meter this will be full scale. What ever the ratio of the CT will dictate the scale face on the meter. A 500 amp CT's output will be 5 amps at 500 amps on the buss. 250 amps on the buss, the CT will output 2.5 amp or half scale on the meter face.
How do you calculate watt meter constant?
K=(voltmeter range*ammeter range*power factor)/wattmeter range
Where is 5P20 CT used and where is Class PS CT used?
5P20 CT give more accuracy than PS class CT. 5P20 cant be used in unit protection. Class PS CT is a protection class ct. It is used for differtial proction,distance (UNIT)proction.
What is CT burden in electrical engineering?
CT (current transformer) Burden is the maximum load that the CT secondary can drive (e.g. meters or protection relays) Why do you care about burden when ordering current transformers? The burden is the termination impedance of the measuring instrument. The measuring instrument can be an analog or digital energy meter, a data logger or a recorder. All instruments that use a current transformer to measure line current must terminate the CT with a resistance (impedance in same case which means there is some inductance involved). A CT supplier should be given the burden when ordering. Technically, the total burden for a CT is the internal winding resistance, the connecting lead resistance and the measuring instrument input resistance. Some Ct's are installed a long distance from the measuring instrument and the connecting leads can have a resistance as much as 0.002 ohms per foot (both ways because the current makes a complete round trip). This resistance will cause an error if not taken into account.
How electronic energy meter works?
By Using CT and PT, The RMS Current, RMS Voltage, True Power are measured by using Sample and Hold Circuits and converts into ADC then using Microcontroller or Microprocessor to calculate the Real values.
LT and CT of EOT crane?
Lt means - long travelling ct means- cross travelling
Multification factor of digital energy meter with ct and pt connection?
Multiplication factor can be derived from Meter CT, Meter PT, Connected CT and Connected PT values.
How do you calculate multiplying factor in 3 phase 4 wire energy meter?
mf is ratio of CT ration of meter box to CT ration written on meter. ex: CT meter box: 30/5, Meter ct ration 1/1. MF : (30/5)/(1/1)= 6
How do you calculate multiplying factor in 3 phase kwh meter using c.t. ratio is 2505VA 5 class 5.0?
multiplying factor = Line CT Ratio / Meter CT Ratio Usually it is mentioned on Meter that MF = 1 if CT Ratio is 200/5 or MF = 2 if CT Ratio is 400/5. There can be an additional multiplication factor that would be mentioned on the meter.
What is the use of CT METER?
is 3 phase Meter electicity to for the measurement of elektricity 3 phase.
Can we used CT meter for measurement of different voltage level?
CT metering circuit can not be used to measure voltage
Why a 5amp. rating ammeter is connected to secondary side of current transformer?
The maximum current output of a CT is 5 amps. Connected to a meter this will be full scale. What ever the ratio of the CT will dictate the scale face on the meter. A 500 amp CT's output will be 5 amps at 500 amps on the buss. 250 amps on the buss, the CT will output 2.5 amp or half scale on the meter face.
What will happen if we use current transformer of different rating for each phase in three phase supply?
A current transformer has to have the same ratio as the meter that it drives. Full scale deflection on the meter is 5 amps which equals the maximum allowed current on the phase that it is reading. A different ratio on the CT to meter would show an erroneous reading on the meter depending on the ratio of the connected CT. To keep costs down the meter is common to all three phases and is read by connecting the meter to the phase CT through a three position switch.
How do you calculate three phase meter reading in kWh with ct coils?
If, Ct value = 50 meter unit = 30 so, 50 x 30 = 1500 kwh
What is heavier 1 kg or 1 meter or 1 lt 1 coin?
It is 1kg
What is the ct multiplier?
A CT multiplier is the ratio of current trough a CT to the output of a CT. Example: A 200/5 Multiplier means that the cable passing through the CT must see 200A to provide a 5A output to the reading meter. The reading meter will then display 200A on it's display but it of course is only seeing 5A itself. Many digital meters have selectable Multipliers so you don't have to stock a wide selection of meters.
How do you calculate multiplying factor in 3 phase kwh meter using ct ratio is 600VA 5 class 5.0?
The question is incomplete, because there are no mention about CT & PT ratios. 600VA 5 can not be CT ratio.
