Vanguard ATRT-01_01B_01D - Manual (Page 27)

Model ATRT-01 (v) Operating Instructions
Rev 02
May 02, 2002
26
25-3. Three-Phase Transformer Test Procedure using nameplate voltages
Table 25.3 shows the steps to test a three-phase transformer.
Table 25-3. Three-Phase Transformer Test Procedure.
STEP DESCRIPTION DISPLAY ACTION
1 Initiate Transformer Test 1. TEST XFMR 04/12/00
2. SETUP 13:06:00
3. CALCULATOR Press key 1
2 Select Delta to Y Phase
Transformer XFMR CONFIGURATION
1. SNGL PHS 2. dT-Y
3. Y-dT 4.dT-dT
5. Y-Y Press key 2
3 Select to use transformer name
plate voltage XFMR NAME PLATE VLTG
1. YES
2. NO Press key 1
4 Enter H line voltage ENTER H WINDING
NAME-PLATE VOLTAGE
V Use keys 0-9
5 Confirm H voltage ENTER H WINDING
NAME-PLATE VOLTAGE
7200 V
6 Enter X line voltage ENTER X WINDING
NAME-PLATE VOLTAGE
V Use keys 0-9
7 Confirm X voltage ENTER X WINDING
NAME-PLATE VOLTAGE
480 V Press ENTER
8 ATRT-01 display phase A cable
connection CABLE PHS-A XFMR
X1, X2 to X1, X0
H1, H2 to H1, H3
“START” TO RUN TEST Connect cables
9 Start phase A test CABLE PHS-A XFMR
X1, X2 to X1, X0
H1, H2 to H1, H3
“START” TO RUN TEST Press START
10 Observe phase A test results RATIO mA %DIFF
+15.003 001 0.02
“ENTER” TO CONTINUE None
11 ATRT-01 display phase B cable
connection CABLE PHS-B XFMR
X1, X2 to X2, X0
H1, H2 to H2, H1
“START” TO RUN TEST Connect cables
12 Start phase B test CABLE PHS-B XFMR
X1, X2 to X2, X0
H1, H2 to H2, H1
“START” TO RUN TEST Press START