RELAY CONTACT ARCING WAVEFORM
When current flow through inductive circuit is interrupted, voltage proportional to V= L (di/dt) is produced. This voltage can be…
When current flow through inductive circuit is interrupted, voltage proportional to V= L (di/dt) is produced. This voltage can be…
Current Transformer (CT) failure can be due to many reasons some of which are contamination, open circuit secondary, incorrect application…
Saturation of current transformers (CT) when carrying high magnitude current is a well-known phenomenon. Usually symmetrical fault current is used…
High magnitude current lasting few power cycles during switching on a power transformer is known as transformer inrush current. Magnitude…
Power transformer can saturate when voltage to frequency ratio for the particular transformer design is violated. Transformer is said to…
High impedance bus differential is a method of differential bus protection using parallel set of current transformers (CT) from each…
In this article an actual fault waveform captured on high impedance bus differential relay at 13.2 kV is discussed. Fault…
Multi ratio current transformers (CT) allow users to pick current transformation ratio needed for specific application from a given CT.…
Short circuit test is performed on a transformer to measure the equivalent series resistance and reactance. Series resistance provides information…
Ground Potential Rise [GPR] Ground potential Rise (GPR) per IEEE Std 80 is defined as “The maximum electrical potential that…