0
What happens to the meter reading when you invert the direction of the arrow on the current transformer of power meter?
Wiki User
∙ 10y ago
The wattmeter will read downscale (backwards).
Wiki User
∙ 10y ago
Add your answer:
Earn +20 pts
How may the direction of current flow in an armature be determined?
Just like reading a book. Left to right, up to down.
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.
what are the advantage of current transformer?
These are used with low range ammeters to measure current in HVAC 's where direct connection of instruments is impratical. They not only insulate the instruments from HV lines but also step down current in a known ratio. ( i .e . ) Iline =(I1 \I2) * Ammeter Reading where Iline = Line Current I1 \I2 = Current Ratio
How do you measure the circulating current in 3 phase parallel system?
The clamp on amp meter has to go around both of the parallel conductors to get an accurate reading of the line current. If you are using a current transformer, both wires have to go through the centre hole in the transformer.
What is the difference between rated current In and tripped current?
"Rated current" is the current the device (motor or transformer?) is designed to handle at full load. "Tripping current" is the current where a protective device (fuse, breaker) will open to protect the device from overload/overheating. "Tripped current", may be the current the tripping device measured prior to making the decision to trip, if you are reading this from a digital protective device like a relay or OCR.
What is a Current Reversing Transformer?
This is a transformer built into electrical appliance to make electricity meter to stop reading or made to read in reverse order. This reduces the consumption reading and cheats the system. That is bad.
What happens to the ammeter reading if resistor is removed?
Opening any circuit will stop the current from flowing.
How may the direction of current flow in an armature be determined?
Just like reading a book. Left to right, up to down.
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.
You have an avc avometer transformer 100 amps 100 ma it says to use with avc model 7.8 heavy duty avometers it looks old what is it used for?
Measuring currents to 100A A.C. You set the meter to 100 mA and connect the transformer output to the meter. When the primary current is connected the meter will read the current flow. Full scale (100mA) then means 100A in the transformer, so you multiply the scale reading by 1,000.
What is k factor in energy meter?
The K Factor in Current Transformer Metering is the Multiplyer. The current transformers might be a winding ratio of 200/5 therefore the K Factor would be 40. Meaning for every 100Amps in the meterered conductors only 2.5A is read by the meter the resultant reading is then multiplied by 40 to give the reading of 100A (or the calculated kWh reading for electricity consumption)
What happens to light waves when they pass through a window?
The light changes its direction. In case you want to do more reading on the subject, this is called "refraction".The light changes its direction. In case you want to do more reading on the subject, this is called "refraction".The light changes its direction. In case you want to do more reading on the subject, this is called "refraction".The light changes its direction. In case you want to do more reading on the subject, this is called "refraction".
What direction is London from reading?
From Reading, London is to the East.
what are the advantage of current transformer?
These are used with low range ammeters to measure current in HVAC 's where direct connection of instruments is impratical. They not only insulate the instruments from HV lines but also step down current in a known ratio. ( i .e . ) Iline =(I1 \I2) * Ammeter Reading where Iline = Line Current I1 \I2 = Current Ratio
How do you measure the circulating current in 3 phase parallel system?
The clamp on amp meter has to go around both of the parallel conductors to get an accurate reading of the line current. If you are using a current transformer, both wires have to go through the centre hole in the transformer.
What is the difference between rated current In and tripped current?
"Rated current" is the current the device (motor or transformer?) is designed to handle at full load. "Tripping current" is the current where a protective device (fuse, breaker) will open to protect the device from overload/overheating. "Tripped current", may be the current the tripping device measured prior to making the decision to trip, if you are reading this from a digital protective device like a relay or OCR.
What would happen if the direction of the current through a hall probe is reversed?
The idea is that the magnetic field of the device reacts with the external magnetic field. If the current is reversed, the magnetic field would also be reversed, and the reading would be the opposite.
