5.8 Measurement & Limits
The measurement & limits settings provide options
for running and evaluating turns ratio tests.
5.8.1 Measurement &
Limits Options
Option
Available Settings
50Hz
60Hz
° - Degrees
” - Minutes
On
Off
After bootup, open last test
0.1% - 9.9% (0.1% steps)
0.1° - 9.9° (0.1° steps)
6” - 594” (6” steps)
On
Off
Line Frequency
Ratio Error Limit
Test Buzzer
Ratio Display
Imbalance Limit
Phase Deviation Limit
Error Limited OLTC
Phase
Auto Continue
5.9 Transformer Nameplate
The default transformer nameplate for running a test
can be set here.
5.9.1 Transformer Nameplate
Options and Buttons
Option
Available Settings
See Primary Vector
Selection Screen (5.9.2)
1 - 150
ANSI
IEC
AUS
On
Off
Optional SW Feature
On
Off
Optional SW Feature
DETC
OLTC
1
A,B,C
1,2,3
1R,N,1L
+1,0,-1
See Secondary Vector
Selection Screen (5.9.3)
Primary Vector
Primary Tap Changer
Secondary Tap Changer
Primary Tap Labels
Secondary Tap Labels
Primary # Taps
Secondary # Taps
Secondary Vector
Standard
Tap Ø Shift
Relative Phase Shift
TNR
TVR
0.1% - 9.9% (0.1% steps)
Optional SW Feature
1 V, 5 V, 10 V
1 - 9
1
Only one winding can be OLTC
Round Tap Voltages
# OLTC Nominals
On
Off
Optional SW feature
Operation
24 TTRU3 User Manual us.megger.com
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