The measured Power in KWh will become one-third
beacause the output of one CT which is reveresed will cancel the output of other CT and therefore the final output will be from only one CT (i.e 1/3 of total output)
it will work as a rectifier . because the AC current to be rectified will not be effected by this change. the out put DC polarity will be changed.
THIS MULTIPLIER WHETHER USED FOR MEASURING POWER (WATT METER/KILOWATT METER) OR ENERGY (KILOWATT-HOUR METER) ARE USUALLY USED FOR HIGH AMPERE LOAD UNLIKE IN RESIDENTIAL APPLICATION THAT METERING ARE DIRECTLY CONNECTED TO SUPPLY LINE. THIS MULTIPLIER IS OBTAINED FROM THE RATIO OF CURRENT TRANSFORMER USED, FOR EXAMPLE 300:5 THIS MEANS YOU HAVE TO MULTIPLY YOUR GATHERED READINGS TO 60 TO HAVE THE ACTUAL CONSUMPTION. THE CURRENT TRANSFORMER (INSTRUMENT TRANSFORMER) IS NORMALLY SHAPED LIKE "DOUGHNUT" WHERE CABLE PASS THROUGH OR RECTANGULAR SHAPED FOR BUSBARS TO MEASURE ACTUAL LINE CURRENT AND COMBINED WITH POTENTIAL (VOLTAGE) TRANSFORMER FOR REMOTE METERING AND SYSTEM PROTECTION PURPOSES IN COMMERCIAL & INDUSTRIAL APPLICATIONS OR WHERE LOAD ARE HIGHER AND FOR SAFETY PURPOSES TO PERSONNEL/TECHNICIANS.
The mgnetic inrush current is the current drawn by the transformer when power is applied to the primary winding
load
Yes, if they are reversed the reading is also reversed. On a digital meter this will usually be displayed as a negative value, but on the older style mechanical analog multimeters it may actually damage the meter by "pegging" the needle in the backwards direction and bending it causing all future readings to be wrong.
when two transformer are connected in parallel condition,and the polarity of transformer are opposite to each other then a large circulating current flow through out the winding,therefore a very small current flow thro, the load .therefore lifespan of transformer will be reduced.
sketch the I-V characteristics of a semiconducto zener diode
The windings of a transformer do have poles, which alternate in polarity in step with the A.C. magnetising current. As the polarity of the poles reverse, so too does the direction of the magnetic flux within the transformer's core.
AC current alternates polarity back-and-forth continually, by definition. Therefore, it is not possible to reverse AC direction. It is DC current that is directional such that when it's polarity is reversed the motor responds by turning in the opposite direction.
When changing the auxilary face winding connection the current flow in the winding is changed so that the rotating emf direction is changed . Thats why the motor rotates in opposite direction.
it will work as a rectifier . because the AC current to be rectified will not be effected by this change. the out put DC polarity will be changed.
Because if you reversed the polarity at the battery it would blow the fuse through which current flows to the drain.
A 'polarity test' is conducted on a single-phase transformer, not a three-phase transformer (or transformer bank). The polarity of a single-phase transformer being important if two transformers are to be connected in parallel, or three transformers are going to be connected to form a three-phase transformer bank.'Angular displacement' is, to a three-phase transformer, what 'polarity' is to a single-phase transformer. So you really should be asking about angular displacement, rather than polarity. Angular displacement, or 'phase displacement', is the angle by which the secondary line voltage lags the primary line voltage.Angular displacement can be determined either by drawing a phasor diagram of the three-phase connection and measuring it, or by looking up the connection in a vector-group chart/table -you would nor normally 'calculate' angular displacement.
A current transformer step downs the current in a power circuit to a lower amperage. A voltage transformer steps down the voltage in a power circuit, typically to 110 volts AC for residential and business use.
The current is reversed in a galvanometer
There is no positive and negative on a transformer. Transformers will only pass AC (alternating current), due to the fact that induction will only occur with a moving field. The current has to be changing polarity and intensity continuosly, for the current to be induced in the windings. Both terminals on the output vary, with relation to each other. Put DC into a transformer and the coils will saturate, overheat and probably burn out.
The polarity of DC generator can be reversed by reversing the field current as well as direction of rotation