Vanguard Accu-Trans - Manual (Page 24)

Accu-Trans

Operating Procedures
20
switch generates large reactive voltage
spikes that are hazardous and exceed
the switch’s voltage ratings, thus
causing irreparable damage.
By connecting the Accu-Trans
continuity test input across the
switching input and running the
regulator switch through all the
contacts in it’s range, any breaks in
continuity caused by faulty tap
switching are detected.
a) To run the Voltage-Regulator test,
perform the following step-by-step
sequence, starting with the STARTUP
MENU (see below):
b) Press key #2 (SETUP) to produce the
SETUP MENU (see below):
c) Press key #4 (NEXT PAGE) to produce
the next menu of test options (see next
display):
d) Connect Accu-Trans input to the
regulating tap-switch input. Press key #4
(VOLTAGE REG. TEST) to start the
regulator test (high-voltage advisory notice
displays—see following):
e) Press ENTER key for next display (see
below):
f) Press START key to run the voltage
regulator tap-switch test. The test begins as
the magnetic field in the transformer ramps
up to a stable plateau with the advisory that
the transformer is charging (the red High-
voltage warning indicator lights) When the
transformer current stabilizes, the following
prompt displays (see below):
No operator action required; when
transformer current ramps nears a flat
plateau, the run tap switch prompt displays
(see below):
If no transient is detected as taps are
switching, the display above will remain.
Press “STOP” to end the voltage regulator
test.
1. TEST XFMR 08/14/01
2. SETUP 12:21:01
1. ENTER XFMR ID
2. REVIEW RECORD
3. RESTORE RECORD
4. NEXT PAGE
1. COMPUTER CONTROL
2. SET TIME
3. ENABLE TEST MODES
4. VOLTAGE REG. TEST
*****WARNING!*****
DANGEROUS FLASH-OVER
MAY OCCUR IF CABLES
ARE DISCONNECTED!
VOLTAGE REG. TEST
“START” TO RUN TEST
or
“STOP” TO ABORT
VOLTAGE REG. TEST
CURRENT RAMP: xx %
*XFMR CHARGING*
VOLTAGE REG. TEST
RUN TAP CHANGER NOW
“STOP” TO EXIT TEST
XFMR CHARGING