Electrical Measurements |
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Page 141
... shunted instrument by constructing the shunt of material having the same temperature coefficient as the moving coil . This would not be practical in an instrument having separate external shunts since it might well be that , in use , a ...
... shunted instrument by constructing the shunt of material having the same temperature coefficient as the moving coil . This would not be practical in an instrument having separate external shunts since it might well be that , in use , a ...
Page 517
... shunt , resistance is varied at N in the lead from the shunt to the current element of the meter . An internal 60 - mv shunt is used with cur- rents up to 80 amp , and an external 75 - mv shunt with currents of 100 amp or more . The ...
... shunt , resistance is varied at N in the lead from the shunt to the current element of the meter . An internal 60 - mv shunt is used with cur- rents up to 80 amp , and an external 75 - mv shunt with currents of 100 amp or more . The ...
Page 556
... shunt resistance . The use of a shunt capacitance across the secondary ( or primary ) terminals of the transformer has the advantage that the compensating current adds at a small angle to I , and therefore changes the transformer ratio ...
... shunt resistance . The use of a shunt capacitance across the secondary ( or primary ) terminals of the transformer has the advantage that the compensating current adds at a small angle to I , and therefore changes the transformer ratio ...
Contents
The Art of Measurement | 1 |
Electrical Units | 15 |
DirectCurrent Galvanometers | 44 |
Copyright | |
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Common terms and phrases
accuracy adjustment air gap alternating current ammeter arrangement balance ballistic bridge C₁ calibration capacitance capacitor cell compensation connected constant construction decreases deflection detector dial direct current disc effect electrical electrode element emf's equation error field frequency friction function galvanometer heater impedance increase indication inductor instrument insulation load magnetic circuit magnetizing force magnitude manganin maximum measuring circuit mechanical ment meter method moving coil moving system mutual inductance ohms operating oscillograph permeability phase angle plate pointer position potentiometer power factor precision primary quantity R₁ R₂ range ratio arms reading relative damping resistance resistor result scale secondary sensitivity shield shown in Fig shunt slide wire specimen standard switch temperature coefficient terminals test coil thermal thermocouple torque transformer tube units usually V₁ vector voltage circuit voltage drop voltmeter volts wattmeter Wheatstone bridge winding Z₁ zero