Winding Resistance Measurement Using Quick Test - Omicron CT SB2 User Manual

CT Analyzer User Manual
3.5.6

Winding resistance measurement using Quick Test

Applicable for Quick Test mode only.
To measure the winding resistance of VTs or CTs using CT Analyzer, you can either use the Quick Test
function of CT Analyzer (see chapter 10 on page 142) or the CT Analyzer Quick Test function of the
CT Analyzer Suite software.
Observe the general safety rules in section 3.1 on page 23 and the safety instructions given in chapter
1 "Safety instructions" on page 9.
For winding resistance measurements using Quick Test, connect CT Analyzer as shown in Figure 3-17.
For a detailed description on how to perform such measurements, please refer to section 10.8 on page
160.
Connect the CT Analyzer OUTPUT sockets and input SEC to the winding to be measured.
a
A
n
N
Figure 3-17: Connecting CT Analyzer for winding resistance measurement
WARNING
Death or severe injury caused by high voltage or current possible
Resistance measurement is performed with DC current. Feeding an inductance with DC
current will charge the inductance. CT Analyzer does not perform automatic discharge of
the inductance.
► Wait until the inductance has discharged completely before touching any connections
or disconnecting the measurement leads of CT Analyzer.
NOTICE
Equipment damage possible
Too high currents could destroy the winding.
► Use only low currents of e.g. 100 mA when measuring the primary side of VTs.
42 OMICRON