Appendix 4 Temperature Correction Table
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付録
索引
171
The temperature correction function uses
the tables below.
• Tables No.0 to 8 are based on Chinese
standards.
• Table No.9 is based on the US IEEE stan-
dards.
Source
→
GB50150-91 Standard for hand-over
test of electric equipment, electric
equipment installation engineering
(Chinese)
Reference
→
DL/T596-1996 Power installation pre-
ventive maintenance code (Chinese)
Appendix 4 Temperature Correction
Table
Object under test
Oil-impregnated power transformer
Selectable reference
temperature range
-10 to 70°C (default 20°C)
Convertible range of
actual temperature
used for measurement
-10.0 to 70.0°C
Correction formula
Rtref : Resistance after correction
for reference temperature
of tref°C
Rt
: Resistance measured at
the temperature of t°C
tref
: Reference temperature [°C]
t
: Actual temperature used
for measurement [°C]
Rt
5
.
1
tref
10
/
)
(
R
×
=
−
tref
t
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