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Functions of Instrument Transformers (CTs and PTs)
AC type protective relays are actuated by the current and voltage supplied by the current and potential (voltage) transformers which ... -
Advantages & Disadvantages of Synchronous Motors
In industries induction motors are employed mostly because of less cost, rugged construction, good starting torques and very less maintenance. ... -
Advantages & Disadvantages Electromagnetic Relays
In Electromagnetic relays operating current flows through the coil. When this operating current increases, coil energizes the electromagnet. When the ... -
Neutral Grounding Practice in Power System
Generally on neutral grounding is provided at each voltage. There will be several voltage levels between the generation of the ... -
Shunt Capacitor Advantages in Power System
Normal loads on ac supply system are inductive in nature (eg: motors, power transformers, voltage regulators, induction furnace, choke coils, ... -
Crowbar fault protection circuit
Crowbar circuit is used to protect circuit or equipment under fault condition Over Current Causes: Over current flow through thyristors ... -
R R-C Firing Circuits Disadvantages
Firing Circuits: Gate triggering is the most commonly used turn-on method employed to switch on the thyristors. Triggering circuits is ... -
Importance of Hysteresis Loop
Hysteresis Loss: When a magnetic material is subjected to a cycle of magnetization (magnetized first in one direction and later ... -
Advantages of Star and Delta Systems
In a 3-phase system the alternators or generators may be star connected or delta connected. Likewise 3-phase loads may be star connected ... -
Reactive Power Sources and Sinks in Power System
Dynamic Reactive Power Sources: It includes reactive power compensators which have the ability to respond within duration of cycles and ...