Vanguard Accu-Trans - Manual (Page 23)

Accu-Trans

Operating Procedures
19
a) Begin the date and time set by pressing
key # 4 (NEXT PAGE) and going to the
next step. The menu below appears. Go to
the next step.
b) Press key # 2 (SET TIME) and go to the
next step. The display below appears:
c) Enter the date and time, which appear in
the dashed-line areas, then press ENTER
key to set the calendar and clock and return
to the Start-UP Menu. This ends the Set
Time step sequence.
6.3.8 Enable Passive Test Mode
Operators have a choice between two test
modes: ACTIVE or PASSIVE. Normally,
the ACTIVE test mode is best suited for
quickly testing transformer resistances. In
this mode, the Accu-Trans automatically
ramps the test current up to its final test
value (when the magnetic field is saturated)
in the shortest possible time. However, in a
very large inductive load, the ACTIVE test
mode reading may appear to be unstable.
In this situation, the user may want to try the
PASSIVE test mode test. In this mode, the
Accu-Trans will take longer to provide a
reading, however, the reading is more stable.
Note
The Accu-Trans always defaults to the
ACTIVE test mode when power is first
applied to the unit. The user needs to enable
the PASSIVE test mode before using it.
a) This procedure begins in the Set-Up
Menu, shown below. Go to the next step:
b) Pressing key #4 (NEXT PAGE) and the
menu below appears:
c) Press key #3 to activate PASSIVE Test
mode.
Note
Once the PASSIVE test mode is
selected, the Accu-Trans will display the
test mode selection menu (shown below)
in step 6.2.2.a after the user presses key
#1 (TEST XFMR).
6.3.9 Voltage Regulator Test
Note
This test verifies that a regulating
switch in a primary-voltage tap
regulator changes contacts through its
selection range with no break in the
circuit (i.e., it checks the tap switch’s
make-before-break). This test is
important because, in actual use, any
breaks in current in a regulating tap
1. ACTIVE TEST
2. PASSIVE TEST
ENTER
MM-DD-YY HH:MM:SS
1. COMPUTER CONTROL
2. SET TIME
3. ENABLE TEST MODES
1. ENTER XFMR ID
2. REVIEW RECORD
3. RESTORE RECORD
4. NEXT PAGE
1. COMPUTER CONTROL
2. SET TIME
3. ENABLE TEST MODE