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…
Duplex Reactor
Duplex Reactor or Duplex Current Limiting Reactor consists of two otherwise single-phase reactors physically arranged such that their magnetic fields…
Star and Delta Connection of Capacitors
Power capacitors in 3 phase capacitor bank connections are either delta connected or star (wye) connected. Between the two types…
Current Limiting Reactor
Current Limiting Reactor (CLR) is used to reduce the available short circuit level to a value that matches the rating…
How to calculate reactive power of a transformer?
Transformer reactive power consumption Power transformers ‘consume’ inductive VARS during operation. This is due to the reactive power requirement of…