Page 490 - Instrumentation Reference Book 3E
P. 490
The measurement of resistance, capacitance, and inductance 473
For an ideal transformer
n1 turns
n2 turns
Figure 20.63 Tapped transformer winding.
und
core
W
Figure 20.64 Construction ofatoroidal tapped
transformer.
Ib)
Figure 20.61 (a) Straycapacltances in afour-arm a.c.
bridge; (b) equivalent circuit of an a.c. four-arm bridge with
stray admittances.
A
C
Figure 20.62 Wagnerearthing arrangement
their resistance. Figure 20.65 shows an equivalent
circuit of such a tramformer. L1 and L2 are the
leakage inductances of the windings; R1 and R2 are
the winding resistances; M is the mutual induct-
ance between the windings; and R represents hys-
teresis and eddy-current loss in the core. Figure 20.65 Equivalent circuit of a tapped transformer.
