Anti pumping relay is used in the circuit breakers to prevent unwanted closing of the breaker after immediate tripping. Due to failure of the TNC…
Posts published in “Power Systems”
Power Systems
The trip circuit supervision relay always monitors the healthiness of the trip circuit including a connected trip coil of the CB. Tripping or isolation of…
Grading capacitor is commonly used in High Voltage Circuit Breaker for uniform voltage distribution across the Breaker contacts at CB open position. In a multi-break…
In addition to the general protection, backup impedance protection or distance protection is also used in Generator, Transformer & Reactor to protect during external faults…
The main difference between earthing and grounding is that – Under Earthing, the circuit is physically connected to the ground to flow circulating current or…
Floating neutral is a condition, in which the neutral wire of any circuit is disconnected from the ground. In AC system, the neutral wire is…
OLTC stands for On-load tap changer which is used in Transformer to regulate the output voltage. OLTC is installed inside the transformer main tank. It…
When the voltage goes higher than the rated voltage is called Over Voltage. It is a very common issue in Power systems. System voltage is…
After opening the Circuit Breaker under load or fault condition, a transit voltage appears across the breaker contacts which is called Restriking Voltage. Frequency of…
The Corona Effect is the phenomenon of electric discharge in high voltage transmission lines and substations. Hissing noise and violet glow were observed under the…