Vanguard TRM-20_40 - Manual (Page 39)

REV 1 TRM-20 AND TRM-40 USER’S MANUAL
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3.10 Performing a Load Tap Changer / Voltage Regulator Resistance Test
The Load Tap Changer/Voltage Regulator Resistance Test can be used to conveniently measure
the resistance at each tap position. Once the number of taps has been entered, the TRM will
request the user to set the tap position, starting with the lower taps, then to neutral, and then
to the raise taps. At each tap position, the resistance is measured, displayed on the LCD screen,
and stored. The TRM then instructs the user to change to the next tap position and repeat the
testing process.
Use the steps below to perform an LTC/Voltage Regulator Test:
a. Start from the “START-UP” menu:
Press the [1] key (RUN TEST).
b. The following screen will be displayed:
Press the [1] key (RESISTANCE TEST).
c. The following screen will be displayed:
Press the [1] key (YES).
LTC OR VTG REGULATOR?
1. YES
2. NO
1. RESISTANCE TEST
2. SPECIAL RES TEST
3. DYNAMIC LTC TEST
4. DEGAUSS WINDING
1. RUN TEST
2. SETUP
3. USER DIAGNOSTICS
11/07/11
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