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What is the formula of the phase angle of the secondary load circuit?
a Explanation: The reactance and resistance of the external burden is first calculated. Next, the value is taken tan inverse to obtain the phase angle of secondary load circuit.
a
See lessExplanation: The reactance and resistance of the external burden is first calculated.
Next, the value is taken tan inverse to obtain the phase angle of secondary load circuit.
How many types of errors are present in the current transformers?
b Explanation: There are 2 types of errors present in the current transformers. They are ratio error and phase angle erro
b
See lessExplanation: There are 2 types of errors present in the current transformers. They are
ratio error and phase angle erro
What is the definition of the ideal current transformer?
a Explanation: The primary and secondary winding ratio are same. The phase relationship of the windings are also same.
a
See lessExplanation: The primary and secondary winding ratio are same. The phase relationship
of the windings are also same.
How many classifications are present for the current transformers?
: b Explanation: The current transformers is divided into 2 types. They are I) measuring current transformer and II) protective current transformer
: b
See lessExplanation: The current transformers is divided into 2 types. They are I) measuring
current transformer and II) protective current transformer
What is the definition of current transformer?
: c Explanation: For the measuring of high currents, the current transformer is made use of. The measured current is scaled down to lower values equivalently
: c
See lessExplanation: For the measuring of high currents, the current transformer is made use of.
The measured current is scaled down to lower values equivalently
What is the formula for the total winding area?
c Explanation: First the number of turns is calculated along with the area of each conductor. Next, the space factor is calculated and on substitution gives the total winding area.
c
See lessExplanation: First the number of turns is calculated along with the area of each
conductor. Next, the space factor is calculated and on substitution gives the total
winding area.
What is the formula for total number of turns in the magnet coils?
b Explanation: The mmf per coil is first calculated. Next, the current flowing through the coils is measured and on substitution gives the total number of turns
b
See lessExplanation: The mmf per coil is first calculated. Next, the current flowing through the
coils is measured and on substitution gives the total number of turns
What is the value of the resistance temperature coefficient of copper?
a Explanation: The resistance temperature coefficient of copper is calculated at a temperature of 20°C. The resistance temperature coefficient of copper is 0.00393 per °C.
a
See lessExplanation: The resistance temperature coefficient of copper is calculated at a
temperature of 20°C. The resistance temperature coefficient of copper is 0.00393 per
°C.
What is the value of the resistivity temperature coefficient of copper?
c Explanation: The resistivity temperature coefficient of copper is first calculated at a temperature of 20°C. The resistivity temperature coefficient of copper is 0.01734 ohm per m per mm
c
See lessExplanation: The resistivity temperature coefficient of copper is first calculated at a
temperature of 20°C. The resistivity temperature coefficient of copper is 0.01734 ohm
per m per mm
What is the formula for the area of the conductors of the magnet coils?
c Explanation: For calculating the area of the conductors, first the mmf per coil is calculated along with the resistivity of conductors. The length of mean turn and terminal voltage is calculated and on substitution gives the area of the conductors.
c
See lessExplanation: For calculating the area of the conductors, first the mmf per coil is
calculated along with the resistivity of conductors. The length of mean turn and terminal
voltage is calculated and on substitution gives the area of the conductors.