Transformer Excitation Current
What is transformer excitation current? When normal voltage is applied to the terminals of a transformer with the secondary circuit…
Overcompensation of reactive power for induction motors
When excessive amounts of reactive power compensation (PF Correction) is applied to terminals of induction motor, it can result in…
Single Phase Motor Starting
Basics of single-phase motor starting: A single phase motor connected to a single-phase supply will not rotate as the windings…
Autotransformer Starter: A reduced voltage motor starting method
Autotransformer starting of motors is used widely in starting large industrial motors due to its advantage of providing the highest…
MOTOR DIFFERENTIAL PROTECTION
Differential protection of induction motors provides very sensitive protection against internal phase -phase and internal phase-ground faults. Motor needs to…
Open Circuit Current Transformer Characteristics
Open circuit condition in a current transformer (CT) can result in dangerous over voltage condition at the secondary terminals of…
Medium Voltage Cable Shield Grounding
This article discusses the medium voltage (MV) or High Voltage (HV) cable shield grounding or termination methods. Why do high…
Potential Transformer Accuracy
Potential Transformer Definition: Potential transformers (PT) or Voltage Transformers (VT) can be defined as devices used to step down voltage…
Transformer Differential Protection
Transformer Differential Protection Basics: Differential protection of transformers provide complete protection of transformer. Differential protection is possible due to the…
Transformer Connections: Phase Shift and Polarity
Phase shift and phase polarity between two windings of a single-phase transformer depends on how the windings are wound on…