Principles of Electrical Measurements |
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Page 468
... current coils on a common magnetic circuit . The current coils are connected to current transformers in the circuits ... transformer . This has several primary windings each connected to a normal current transformer and the secondary ...
... current coils on a common magnetic circuit . The current coils are connected to current transformers in the circuits ... transformer . This has several primary windings each connected to a normal current transformer and the secondary ...
Page 474
... current trans- formers and voltage transformers may be summarised as follows ... transformer in a high - voltage circuit . As an additional safeguard it is ... TRANSFORMERS VOLTAGE TRANSFORMERS.
... current trans- formers and voltage transformers may be summarised as follows ... transformer in a high - voltage circuit . As an additional safeguard it is ... TRANSFORMERS VOLTAGE TRANSFORMERS.
Page 508
... current transformer testing in § 11.24.2 . , can also be adapted to voltage transformer tests . The testing procedure is similar to that given for current transformers . VSTI sin ( ẞT — Bs ) - 2 - βγ - βs βτ VSTI - Pы1 CURRENT TRANSFORMER ...
... current transformer testing in § 11.24.2 . , can also be adapted to voltage transformer tests . The testing procedure is similar to that given for current transformers . VSTI sin ( ẞT — Bs ) - 2 - βγ - βs βτ VSTI - Pы1 CURRENT TRANSFORMER ...
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accuracy adjustment alternating amount anode applied arms arrangement balance beam bridge calibrated capacitance carrying causes characteristics circuit coil compared compensation component connected constant construction convenient core damping deflection depends determined difference direct disc earth effect electrical electrode elements employed equal equation error example factor field fixed flux force frequency galvanometer give given grid Hence impedance increase indication inductance instrument known leads less limited load magnetic material means measured meter method movement moving mutual necessary negative obtained ohms operating oscillator phase plates position possible potential potentiometer power-factor practice primary principle proportional range ratio reading reduced represents resistance resonance scale screen secondary sensitivity shown in Fig shunt standard suitable supply switch takes temperature torque transformer turns units usually valve variable variation voltage voltmeter winding zero