potential transformer is that which transforms one range of voltage (potential difference ) to another range without changing frequency.AnswerA 'potential transformer' is the North American term for what, elsewhere, is called a 'voltage transformer'. It, together with a current transformer, belongs to a class of transformers known as 'instrument transformers'.Potential transformers are used to (1) reduce the value of a high-voltage supply to a lower value (often 120 V) so that it may be read by ordinary voltmeters, and (2) to electrically-isolate the voltmeter from the high-voltage source for the purpose of safety.In electricity substations, potential transformers are also used to provide an input to certain types of protective relay.
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This is a class of current transformers, and is a fairly low class. This has to do with what kind of burden can be placed on the secondary. A general rule is a C200 current transformer can supply ~200 volts at full ratio to its' secondary. If the burden (the CT resistance + cable resistance + relay or instrument resistance) times the maximum expected current is higher than 200 volts, the CT is likely to saturate. During multiple fault events, a CT may keep some magnetizing current causing CT saturation to be higher on a reclose event. Typically CT's are sized and their ratios are chosen to minimize saturation when feasible.
Difference is in the work spot of voltage. Because of that, difference is in the graphics too. Also, angle(A)>180 , 90<angle(B)<180, angle(C)<90
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
PS class means protectionclass CT. 5P10 means 5% errorshown while 10 times fault current flows.and 5P20 5% errorshown while 20 times fault current flowshence 5P20 superior comparing to 5P10
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
The difference between the Class 365 and Class 465, 466 is basically the cost.
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public means this can be accessed from any class private means this can be accessed only from the current class
The keyword super is used to explicitly call methods/values from the parent class The keyword this is used to explicitly call methods/values from the current class
class III rated for up to 5,000lbs, class IV is rated for up to 10,000lbs towing capacity
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thanks