Basic Elements of Electric Drive: Basic Elements of Electric Drive- Before discussion makes clear that an electric drive system basically consists of a mechanical load to which the required mechanical motion is imparted through a transmission drive usually equipped with gears or pulleys. Gearless transmission is possible sometimes, in which case there exists a direct […]
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Classification of Electric Drive: Classification of Electric Drive are normally classified into three groups, based on their development, namely group, individual and multi motor electric drives. If several groups of mechanisms or machines are organised on one shaft and driven or actuated by one motor, the system is called a group drive or shaft drive.
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Dynamic Electric: Dynamic Electric – An industrial drive system basically consists of a mechanical working equipment or load, which has to be kept in motion to turn out mechanical work, equipment to do this job, called the prime mover, and a transmission to transfer energy from the prime mover to the mechanical load. Transmission equipment
Mesh Analysis Equation: Mesh Analysis Equation and nodal analysis are two basic important techniques used in finding solutions for a network. The suitability of either mesh or nodal analysis to a particular problem depends mainly on the number of voltage sources or current sources. If a network has a large number of voltage sources, it is
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Cut Set Matrix and Tree Branch Voltages: A Cut Set Matrix is a minimal set of branches of a connected graph such that the removal of these branches causes the graph to be cut into exactly two parts. The important property of a Cut Set Matrix is that by restoring anyone of the branches of
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Switching Transistor: The characteristics of modern Switching Transistor are specially suited to the functional requirements mentioned already. These along with the other Semiconductor production of static relays. The properties particularly useful in the realisation of the functional requirements are amplification, switching characteristics, sensitivity, high speeds of response, flexibility of design and application, long life, compact
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Characteristics of Protective Relay: Characteristics of Protective Relay elements using different operating principles. These principles and design criteria determine how well the basic function is performed and how in practice it deviates from the ideal. Static relays can achieve such a high performance that the departures from the ideal in practice are negligible. This high
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Generator Transformer Protection: Generator Transformer Protection – Protective relays, being component parts of electrical switchgear, should be closely associated with the control section of such systems, e.g. indicating and signalling systems. Thus the signalling and indicating systems must also be designed on a static basis. The plug in type modular chassis has been widely adopted already in electronic regulating and control equipment.
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3 Phase Relays: In a 3 Phase Relays, it is economical to build it on a single phase basis. Thus there will be three converter elements, one for each phase, but thereafter the rest of the 3 Phase Relays circuits (e.g. measuring element, output element, etc.) will be common to all the three circuits. This
Types of Protective Relays: Basically, Types of Protective Relays are analogue-binary signal converters with measuring functions. The variables such as current, voltage, phase angle or frequency and derived values obtained by differentiation, integration or other arithmetical operations, appear always as analogue signals at the input of the measuring unit. The output will always have a
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