T
ESTS AND
T
EST
C
ONDITIONS
P
AGE
7-66 V
OLTECH
AT
I
U
SER
M
ANUAL
Which equates to the actual ratios with a one-turn error on the
secondary.
In general, the voltages obtained during any voltage turns ratio test
will not equate exactly to the theoretical calculation of Np / Ns,
because, for example, of the relative positions of the windings with
respect to each other and the core.
General Rule
When setting turns ratio limits in absolute terms, use a limit of
½
turn
less
than the number of turns you want to detect. In this case,
set a limit of 0 (pri) and ½ (sec). This will result in equivalent limits
of 19 and 21. Ideal for detecting errors of one turn or more.
What happens if I set absolute limits for both primary and
secondary windings?
If you want to detect up to a ten-turn error on the primary and one-
turn on the secondary, in the above example, set
9½ (pri) and ½
(sec)
. The tester uses the equivalent ratio limits: 21.95 and 18.05.
Setting both limits WIDENS the limit to allow for an error of ten
turns on the primary SIMULTANEOUSLY with one turn on the
secondary
.
I.e., to allow 190:11 (17.27) and 210:9 (23.33).
Notice that these limits will NOT detect just a one-turn error on the
secondary because you have now chosen limits to allow for errors
on both primary and secondary, resulting in a broader tolerance on
the absolute ratio.
Summary of Contents for AT360
Page 8: ...INTRODUCTION PAGE 1 2 VOLTECH ATI USER MANUAL...
Page 10: ...INTRODUCTION PAGE 1 4 VOLTECH ATI USER MANUAL...
Page 35: ...VOLTECH ATI USER MANUAL PAGE 2 1 2 Getting Started...
Page 36: ...GETTING STARTED PAGE 2 2 VOLTECH ATI USER MANUAL...
Page 102: ...GETTING STARTED PAGE 2 68 VOLTECH ATI USER MANUAL...
Page 123: ...VOLTECH ATI USER MANUAL PAGE 3 1 3 PROGRAM EDITOR...
Page 124: ...PROGRAM EDITOR PAGE 3 2 VOLTECH ATI USER MANUAL...
Page 151: ...PROGRAM EDITOR VOLTECH ATI USER MANUAL PAGE 3 29 Minimum limit only Maximum limit only...
Page 172: ...PROGRAM EDITOR PAGE 3 50 VOLTECH ATI USER MANUAL...
Page 173: ...VOLTECH ATI USER MANUAL PAGE 4 1 4 AT SERIES SERVER...
Page 174: ...AT SERIES SERVER PAGE 4 2 VOLTECH ATI USER MANUAL...
Page 176: ...AT SERIES SERVER PAGE 4 4 VOLTECH ATI USER MANUAL...
Page 225: ...VOLTECH ATI USER MANUAL PAGE 5 1 5 FIXTURES...
Page 226: ...FIXTURES PAGE 5 2 VOLTECH ATI USER MANUAL...
Page 228: ...FIXTURES PAGE 5 4 VOLTECH ATI USER MANUAL...
Page 248: ...FIXTURES PAGE 5 24 VOLTECH ATI USER MANUAL...
Page 249: ...VOLTECH ATI USER MANUAL PAGE 6 1 6 FRONT PANEL MODES...
Page 250: ...FRONT PANEL MODES PAGE 6 2 VOLTECH ATI USER MANUAL...
Page 252: ...FRONT PANEL MODES PAGE 6 4 VOLTECH ATI USER MANUAL...
Page 299: ...VOLTECH ATI USER MANUAL PAGE 7 1 7 TESTS AND TEST CONDITIONS...
Page 425: ...VOLTECH ATI USER MANUAL PAGE 8 1 8 SPECIFICATIONS...
Page 426: ...SPECIFICATIONS PAGE 8 2 VOLTECH ATI USER MANUAL...
Page 461: ...VOLTECH ATI USER MANUAL PAGE 9 1 9 WARRANTY AND SERVICE...
Page 462: ...WARRANTY AND SERVICE PAGE 9 2 ATI USER MANUAL...
Page 464: ...WARRANTY AND SERVICE PAGE 9 4 ATI USER MANUAL...