Q1. If a watt hour meter draws 1.5 W and 11.3 vars from a potential transformer, and 1.2 W and 1.8 vars from a current transformer, the total apparent power burden placed on the current transformer is
A. 1.92 VA
B. 3.24 VA.
C. 2.16 VA.
D. 4.68 VA.
Q2. If a 0.6 accuracy class current transformer has a phase angle β of +10' at 100% rated current, the ratio correction factor is
A. 0.989.
B. 1.005.
C. 0.995.
D. 1.007.
Q3. For a 1.2 accuracy class potential transformer used at a lagging phase angle γ of 10', the RCF value is
A. 0.977.
B. 0.991.
C. 0.988.
D. 0.999.
Q4. In a single-phase wattmeter application at full load, the potential transformer phase-angle error γ is -8' and the current transformer phase-angle error β is -3'. If the load operates at a 0.90 leading pf, the combined PACF of the transformer is
A. 0.99930.
B. 1.00014.
C. 0.99986.
D. 1.00070.