It is proposed to use a non-inductive shunt to increase the range of a 10A moving iron-ammeter to 100A. The resistance of the instrument, including the leads to the shunt, is 0.06 ohms and the Inductance is 15 × 10^-6 H at full scale. If the combination is correct on a d.c circuit, find the error at full scale on a 50 Hz a.c circuit.
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It is proposed to use a non-inductive shunt to increase the range of a 10A moving...
It is proposed to use a non-inductive shunt to increase the range of a 10-A moving iron ammeter to 100 A. The resistance of the instrument, including the leads to the shunt, is 0.06 Ω and the inductance is 15 μH at full scale. If the combination is correct on a.d.c circuit, find the error at full scale on a 50 Hz a.c. circuit
1. (a) i. Briefly explain the three (3) main functions of instruments and give examples each. ii. Explain loading effects in a measurement system.(b) A Maxwell bridge in Fig 1 below is used to measure an inductive impedance. The bridge constants at balance are:R1 = 235 kΩ, C1 = 0.012 µF, R2 = 2.5 kΩ, R3 = 50 kΩFind the series equivalent of the unknown impedance. 2. (a) The power input to a 3-phase induction...