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SF6 Circuit Breaker

SF6 circuit breaker: One of the recent developments in the field of high voltage switchgear is the SF6 circuit breaker. In this a gas called sulphur hexafluoride is used as…

Air Blast Circuit Breaker

Air Blast Circuit Breaker: Air Blast Circuit Breaker - It is not possible to produce a low resistance arc without a considerable gas pressure so that the only type available…

Bus Zone Protection: Bus Zone Protection includes, besides the bus itself the apparatus such as circuit breakers, disconnecting switches, instrument transformers and bus sectionalizing reactors, etc. Although bus zone faults…

Types of Feeder Protection Relay

Types of Feeder Protection Relay: A composite transmission system may use one or more of the following types of Feeder Protection Relay. Overcurrent Protection: This is of two types: (i)…

Common Source Amplifier Using an Op Amp Driver Stage

Common Source Power Amplifier Using an Op Amp Driver Stage: Basic Circuit Operation - The Class-AB MOSFET Power Amplifier with OP Amp Driver Stage circuit in Fig. 18-45(a) consists of…

Operational Amplifier Frequency Response Articles

Operational Amplifier Frequency Response Articles: Operational Amplifier Circuit Stability: Loop Gain and Loop Phase Shift – Consider the inverting amplifier circuit and waveforms in Fig. 15-1(a). The signal voltage voltage…

Small Signal Amplifiers Articles

Small Signal Amplifiers Articles: Single Stage Common Emitter Amplifier Circuit: Specification – Bias circuit design for the Single Stage Common Emitter Amplifier Circuit in shown in Fig. 12-1 and ac…

Circuit Stability Precautions

Circuit Stability Precautions: Power Supply Decoupling - Feedback along supply lines is another source of op-amp circuit instability. This can be minimized by connecting 0.01 μF high-frequency capacitors from each…