Grounding wire running over the tower or substation provides good protection to the electrical system against direct lightning stroke but they fail to provide protection against traveling high voltage or current waves that reach to terminal equipment. The lightning arrester…
The armature will draw a very high current due to the small resistance of the armature winding to avoid this heavy starting current 4 Point starter is used. Here we are going to discuss the 4-point starter it’s working principle and…
There are different types of lightning arresters like Rod Gap Arrester, Horn Gap Arrester, Valve type, and expulsion type and they differ from each other only in construction details. but they operate on the same principle which is to provide…
The conservator tank is the main part of the transformer, It provides space for the expansion of oil and acts as a reservoir for transformer oil. In this article, we will explore the construction, function, and working principle of the…
Why single-phase induction motor is not self-starting? Single-phase induction motor Starting winding to make self starting A single phase induction motor is very similar to a three phase squirrel cage induction motor except for single-phase motor, not self-starting.It has (i) a squirrel-cage rotor as to a…
An induction generator is also called an asynchronous generator. An induction machine can work as a generator. For working as a generator initially, the three-phase induction motor is started as a motor. During motoring operation, it draws reactive volt-amperes from…
The efficiency and regulation of the transformer can be calculated using open circuit and short circuit test on the transformer but to measure temperature rise during operation, it is necessary to conduct a full load test on the transformer. for…
Synchronous motors play a crucial role in various industries, although their usage is relatively limited compared to induction motors. While induction motors are widely used because of their cheap prices, rugged construction, and low maintenance, synchronous motors offer unique advantages…
The dielectric strength of transformer oil is known as BDV or break-down voltage. A Transformer Oil BDV test is performed to find the dielectric strength of transformer oil. BDV is the minimum voltage withstand the capacity of transformer oil without…
What Is Buchholz Relay? Buchholz relay is a mechanically operated relay that is used to protect the transformer from internal faults that occur inside the transformer tank like an inter-turn fault. Buchholz relay is an oil and gas-operated device. The…