Transformers Level 2 Study Guide - - Questions With
Accurate Answers
What is a Reactor? Right Ans - A coil added in series with a load to reduce
inrush current, voltage notching effects, and voltage spikes.
Define Saturable Core reactor Right Ans - inductor whose inductance is
controlled through the use of a magnetic field crated by a second winding
wound around the same iron core as the primary winding.
Define Noch Right Ans - Distortion in a voltage waveform where the
voltage quickly drops toward zero and then returns to the correct value.
Define Common Mode Noise Right Ans - type of electromagnetic
interference induced on power of communications lines.
Define Harmonics Right Ans - Voltage or current at a frequency that is an
integer of the fundamental frequency.
Inrush Current Right Ans - Instantaneous high input current drawn by a
power supply or electrical equipment at turn-on.
What are the two common types of reactors? Right Ans - Dry type
Oil Immersed
Define Saturable Core Reactor Right Ans - An inductor whose inductance is
controlled through the use of a magnetic field created by a second winding
wound around the same iron core as the primary winding.
Define Choke Right Ans - A reactor used to restrict the current to AC or DC
drives in the case of short circuits in the drive itself.
What is an Autotransformer? Right Ans - Any Transformer in which the
primary and secondary circuits have a portion of their two windings in
common.
Accurate Answers
What is a Reactor? Right Ans - A coil added in series with a load to reduce
inrush current, voltage notching effects, and voltage spikes.
Define Saturable Core reactor Right Ans - inductor whose inductance is
controlled through the use of a magnetic field crated by a second winding
wound around the same iron core as the primary winding.
Define Noch Right Ans - Distortion in a voltage waveform where the
voltage quickly drops toward zero and then returns to the correct value.
Define Common Mode Noise Right Ans - type of electromagnetic
interference induced on power of communications lines.
Define Harmonics Right Ans - Voltage or current at a frequency that is an
integer of the fundamental frequency.
Inrush Current Right Ans - Instantaneous high input current drawn by a
power supply or electrical equipment at turn-on.
What are the two common types of reactors? Right Ans - Dry type
Oil Immersed
Define Saturable Core Reactor Right Ans - An inductor whose inductance is
controlled through the use of a magnetic field created by a second winding
wound around the same iron core as the primary winding.
Define Choke Right Ans - A reactor used to restrict the current to AC or DC
drives in the case of short circuits in the drive itself.
What is an Autotransformer? Right Ans - Any Transformer in which the
primary and secondary circuits have a portion of their two windings in
common.
