Voltech AT360, User Manual

Page: 34 / 470

I
NTRODUCTION
P
AGE
1-28 V
OLTECH
AT
I
U
SER
M
ANUAL
As an example, the sequence for measuring inductance may be summarized
below:
Y
N
Ramp-down
Source Voltage
Calculate
Inductance
Compare With
Test Limits
Signal Level
Correct?
Select Nodes
(Relay Switching)
Select Type
Of Source
Change Source
Voltage
Set-up Source
Frequency
Ramp-up Source
Voltage
Measure V & I
Harmonic Analysis
For other tests, the sequence may be more complicated.
Notes
All the relay switching is completed before the test source is energized. This
will ensure that there can be no arcing, and prolong the life of the relays.
In contrast to some LCR bridges, the AT Series testers trim the test source to
give the user programmed test conditions. This will guarantee that the same
test conditions are applied to all transformers that use the same test program.
At the end of the test, the source is safely ramped down, so that the relay
switching for any subsequent test will always occur with the source removed.