Omicron CP TD12 - Necessary measurements for two-winding transformers

OMICRON 39
Power transformers
5.4 Measurements on two-winding transformers
Figure 5-5 shows the measurements necessary for a two-winding transformer, according to IEEE 62
1995
[1]
.
Figure 5-5: Two-winding transformer test according to IEEE 62-1995
1. ANSI Standard 62-1995: "IEEE Guide for Diagnostic Field testing of Electric Power Apparatus - Part 1: Oil Filled Power
Transformers, Regulators, and Reactors", IEEE New York, 1995
Table 5-3: The necessary measurements
Test mode Energize Ground Guard UST Measure
GST High (HV) - Low - C
H
GST Low (LV) - High - C
L
Alternative test for C
HL
UST High (HV) - - Low (LV) C
HL
UST Low (LV) - - High (HV) C
HL
Low High
C
HL
C
L
C
H