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MICROPROCESSOR BASED IMPEDANCE RELAY



INTRODUCTION

In some applications it is necessary that the relay protecting a part of the power system operate for faults within a certain distance of the location on any one of the lines. The protecting scheme accordingly uses distance relays and is divided into three zones. The zones are classified based on the impedance seen by the relay and the relays are hence called impedance relays.

OPERRATING PRICIPLE O ....etc

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Electrical impedance tomography (EIT) is a medical imaging technique in which an image of the conductivity or permittivity of part of the body is inferred from surface electrical measurements. Typically, conducting electrodes are attached to the skin of the subject and small alternating currents are applied to some or all of the electrodes. The resulting electrical potentials are measured, and the process may be repeated for numerous different configurations of applied current.

Proposed applications include monitoring of lung function, dete ....etc

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Output relay Back-EMF Protection



Description

When an electric lock is de-energised, the collapsing magnetic field produces energy to be
generated within the windings of the coil. This energy produces a voltage (or EMF) within the
coil, of the opposite polarity to the normally applied voltage used to energise the magnet.
This ‘back-EMF’ can result in hundreds of volts and can cause damage to the switching relay,
as it sparks across the contacts.
It is normal practice to install a diode, or bridge ....etc

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How do you calculate relay settings of backup impedance of 400kv,63MVAR Shunt line reactor,line lengh of 254km, ....etc

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To begin with, the word tomography can be explained with reference to ?tomo? and
?graphy?; ?tomo? originates from the Greek word ?tomos? which means section or slice,
and ?graphy? refers to representation. Hence tomography refers to any method which
involves reconstruction of the internal structural information within an object mathematically from a series of projections.

The projection here is the visual information probed using an emanation which are physical processes involved. These include physical processes such as radiation, wa ....etc

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calculation to set 7sj600 relay for 200kw,1485 rpm,fla- 346A alstom make 3 phase induction motor for pump application. ....etc

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Like all magazines, we retouch images removing wrinkles in fabric, stray hairs, a few zits, random bra straps but we never alter the way the girls on our pages really look. It crucial that we represent girls of all shapes, sizes, and skin tones for their real beauty. Our Body Peace Project is one of the cornerstones of our mission: We want every girl to stop obsessing about what her body looks like and start appreciating it for what it can do! While we work hard behind the scenes to make sure we being authentic, your notes made me realize that ....etc

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i need mre info abt the EIT ....etc

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