Setup, Connections & Operation
AVTMTTR20 Rev 4 Dec 2015
19
Bushing Current Transformer (BCT) Mounted on Single-Phase, Two-
Winding Transformer
A turn-ratio test can be performed on a BCT after it has been mounted on a
circuit breaker or power transformer entrance bushing. The test can be
performed without removal of the BCT from the equipment. Connect the TTR20
to BCT as shown in Figure 4-10.
NOTES:
1. Expect that polarity of the windings is normal (“+” sign is displayed
in front of the turns ratio test result).
2. A jumper lead is not supplied with the TTR20.
Figure 4-10 Setup for Testing BCT Mounted on Single-Phase Two-Winding Transformer
BCT POLARITY MARKER (TYP)
X1 LEAD
H1 LEAD
H2 LEAD
X1
X2
BCT
H1
H2
JUMPER
LEAD
POWER
TRANSFORMER
X2 LEAD
Содержание TTR20
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