Wheatstone Bridge

The equipment used for resistance measurements above 1 Ohm
is a Wheatstone Bridge,
while for the smaller prisoner
of 1 ohm used Precition Double Bridge.
Measurements were taken at each phase transformer, which is between
terminal:
1) Measurement of the high-voltage terminal
a) In the three-phase transformer
- Phase A - phase B
- Phase B - phase C
- C phase - phase A
b) 1 phase transformer
Terminal H1-H2 for double transformer bushing and
H with Ground Terminal for single transformer bushing
and measurement of the low-voltage side
c) In the three-phase transformer
- Phase A - phase b
- Phase b - c phase
- C phase - a phase
d) The transformer 1 phase (terminals X1-X2-X3 X4 with
linked short).