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What are the Causes of phase angle error and ratio error at Current Transformers?
Wiki User
∙ 14y ago
RATIO ERROR The secondary current is less than the expected value. The secondary is less in magnitude. This diffence is known as ratio error. PHASE ERROR The angle between the expected and actual secondary current is known as phase error.
Wiki User
∙ 15y ago
Wiki User
∙ 14y agoThe ratio error is caused just because of making mistakes in the number of turns of the transformer. The under test transformer is compared with the standard transformer using an Instrument Transformer Test Set and the ratio error of the under test transformer is calculated. The ratio error is then corrected by inserting more turns or removing turns from the current transformer.
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What is 5P10 in current transformer?
Two types of CTs. one is for metering another one is for ProtectionThe metering CT has very less error,the protection CT has more error but thathas more saturation level.5 - 5% error. P for protection and 10 indicates 10 times the rated current.
What is cl PS current transformer?
CL of a CT is its accuracy class.. it is an approximate measure of the CT's accuracy. e.g. The ratio (primary to secondary current) error of a Class 1 (CL:1.0) CT is 1% at rated current
What is acceptable ratio error for 5P20 class ct?
A 5P20 CT has a guaranteed error of less than 5% at 20 times it's rated current (in this case 5A, so at 100A), when it's secondary burden is at it's nominal VA rating. The acceptable ratio error has to allow the CT to perform within these bounds to be declared a 5P20 CT.
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.
Experimental error caused by instrumental limitations?
Error caused by instrumental limitations is actually called systematic error, not experimental error.
What is phase angle error of current transformer?
The angle between the expected and actual secondary current is known as phase error.
What is difference between 5P10 and 5P20 Current transformers?
it means accuracy class of CT. 5 p means 5 % of composite error will happen till 20 times of current is applied . So CT will follow its rated characterstics upto 20 times currentRead more: What_does_mean_by_5p20_CT
What are the release dates for Transformers Animated - 2007 Human Error Part I 3-8?
Transformers Animated - 2007 Human Error Part I 3-8 was released on: USA: 18 April 2009
What are the release dates for Transformers Animated - 2007 Human Error Part II 3-9?
Transformers Animated - 2007 Human Error Part II 3-9 was released on: USA: 25 April 2009
What is the difference between a right angle and a squaer angle?
A right angle is an angle that measures 90 degrees. A squaer angle is a typographic error.
What is voltage error circuit and current error circuit?
A voltage error circuit is called an error amplifier and happens when there are discrepancies between the voltage output and the reference voltage. A current error circuit happens when there is a disruption of flow in an ammeter.
What causes parity error?
The main causes of parity error are magnetic or electrostatic conditions. This will result mainly into corruption of the computer memory chips.
How do you get a on error code for transformers bot shots?
check this guy could bunk and he gives u 5 cheats :p
What happens when parity memory detects an error?
A parity error always causes the system to halt.
A stop error is an error so drastic it causes Windows to hang or lock up?
true
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it is because of human error
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human error
