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Recovery Voltage

Recovery Voltage: Recovery Voltage - While closing or opening the circuit breaker, the circuit constants play an important role. It was noticed in practice a circuit breaker that would operate…

Silicon Unilateral Switch

Silicon Unilateral Switch: The Silicon Unilateral Switch (SUS), also known as a four layer diode and as a Schokley diode, can be treated as a low-current SCR without a gate…

Power Factor Improvement Methods

Power Factor Improvement Methods: There are many drives which operate at a low power factor. Some of Power Factor Improvement Methods are: An induction motor direct on line. ac-dc diode…

Operation of Synchronous Motor

Operation of Synchronous Motor: Operation of Synchronous Motor - For any speed other than synchronous speed, the relative speed between air gap flux wave and the rotor is not zero.…

Overvoltage Protection Articles

Overvoltage Protection Articles: Lightning : An electric discharge between cloud and earth, between clouds or between the charge centres of the same cloud is known as lightning. Lightning is a…

Rogowski Coil Integrator Design

Rogowski Coil Integrator Design: If a Rogowski Coil Integrator Design is placed surrounding a current carrying conductor, the voltage signal induced in the coil is vi(t) = M dI(t)/dt where…

Multistage Impulse Generator Circuit

Multistage Impulse Generator Circuit: In the early discussion, the generator capacitance C1 is to be first charged and then discharged into the wave shaping circuits. A single capacitor C1 may…

Types of Lightning Strikes: There are two Types of Lightning Strikes may strike the power system (e.g. overhead lines, towers, sub-stations etc.), namely; Direct stroke Indirect stroke 1. Direct stroke:…