ST-3/XT3 User Guide
Page • 3
Table of Contents
Limited Warranty......................................................................................... 2
Disclaimer.................................................................................................... 2
Table of Contents ........................................................................................ 3
Chapter 1
Introduction..................................................................................................7
ST-3/XT3 Overview ...................................................................................... 7
Chapter 2
Description....................................................................................................9
ST-3/XT3 tester............................................................................................ 9
Front/Rear View of the ST-3/XT3..................................................... 10
Side View of the ST-3/XT3................................................................ 11
Theory of Operation.................................................................................. 13
Power Quality .................................................................................. 13
Primary/Secondary Analysis (CT/PT Ratio and Phase Shift)............. 14
CT Burden ........................................................................................ 14
Admittance ...................................................................................... 15
Accessories ................................................................................................ 16
ST-3/FLEX-CT.................................................................................... 16
ST-3/PT600....................................................................................... 16
ST-3/ALW ......................................................................................... 17
ST-3/VLW ......................................................................................... 17
ST-3/EXT........................................................................................... 17
Chapter 3
Operation....................................................................................................19
Summary ................................................................................................... 20
Installing the ST-3/XT3............................................................................... 21
Connecting to the ST-3/XT3....................................................................... 23
Running the Application ............................................................................ 24
Available Tests........................................................................................... 25
Test Examples............................................................................................ 26
Example 1: Power Quality Test: Form 9S Wye with 3CT and 3PT .... 27
Example 2: Primary/Secondary Analysis (CT Ratio Test): Form 3S
Single-Phase with CT........................................................................ 29
Example 3: Burden Test Form 5S Delta with CT............................... 31
Example 4: Admittance: form 9S Wye ............................................. 34
Accuracy Test............................................................................................. 35
