Mell What is the incoming current called?
A horizontal movement of water often accompanies the rising and falling of the tide. This is called the tidal current. The incoming tide along the coast and into the bays and estuaries is called a flood current; the outgoing tide is called an ebb current.
What are the two types of voltage transformer?
Two types of voltage transformer are used for protective-relaying purposes, as follows: (1) the “instrument potential transformer,” hereafter to be called simply “potential transformer,” and (2) the “capacitance potential device.” A potential transformer is a conventional transformer having primary and secondary …
How do you find the secondary voltage of a transformer?
The secondary voltage was measured through a Tektronix P6015 high-voltage probe with 1000:1 attenuation attached to a socket that is plugged to the end of the plasma antenna. The secondary current is measured by a Pearson 411 current transformer on the wire between the secondary coil and the plasma antenna.
How to calculate primary and secondary voltages in a transformer?
V (secondary) = Secondary Voltage in Volts. Transformer current calculations: Transformer turns ratio, V (primary) * I (Primary) = V (secondary) * I (secondary) The primary voltage is equal to the product of the secondary voltage and primary current divided by secondary current. V (primary) = V (secondary) * I (Primary) / I (secondary)
Which is the correct definition of a current transformer?
A current transformer (CT) is a type of transformer that is used to reduce or multiply an alternating current (AC). It produces a current in its secondary which is proportional to the current in its primary. Current transformers, along with voltage or potential transformers, are instrument transformers.
Can a voltage transformer be used in an open circuit?
Current transformers are intended to be used as proportional current devices. Therefore a current transformers secondary winding should never be operated into an open circuit, just as a voltage transformer should never be operated into a short circuit.
What should the knee point voltage be on a Transformers?
However, the concept of knee point voltage is very pertinent to protection current transformers, since they are necessarily exposed to fault currents of 20 to 30 times rated current. Ideally, the primary and secondary currents of a current transformer should be in phase.