Table Of Contents - Raytech mini-ATOS Instruction Manual

Contents
1 Safety Precautions .............................................................................................................. 5
1.1 Operators Qualifications .............................................................................................. 5
1.2 High Voltage Apparatus Accessibility During the Tests ................................................ 5
1.3 Ground the Instrument ................................................................................................. 5
1.4 Before Applying Power ................................................................................................ 6
1.5 Keep Away from Live Circuits ...................................................................................... 6
1.6 Do Not Operate in An Explosive Atmosphere .............................................................. 6
1.7 Do Not Substitute Parts or Modify Instrument .............................................................. 6
1.8 Do Not Operate in A Condensing Humidity or Under Rain ........................................... 6
1.9 Always Keep Distance from the Test Object During the Tests ..................................... 6
2 Unpacking ........................................................................................................................... 8
3 Introduction ......................................................................................................................... 9
4 Calculation and Measurement Methods .............................................................................10
4.1 Turns Ratio Measurement...........................................................................................10
4.1.1 Principle ...............................................................................................................10
4.1.2 Voltage Ratio and Turns Ratio .............................................................................10
4.1.3 Relative Error .......................................................................................................12
4.2 DC Resistance Test ....................................................................................................13
4.2.1 Principle ...............................................................................................................13
4.2.2 Temperature Correction .......................................................................................14
4.2.3 Resistance Deviation ...........................................................................................15
4.3 Demagnetization .........................................................................................................16
4.3.1
Raytech SPP Demagnetization Method ...............................................................17
4.3.2 Three-Phase Transformer Demagnetization ........................................................18
4.4 Magnetic Balance .......................................................................................................19
5 Measurement Setup ...........................................................................................................20
5.1 Connecting Test Cables to Transformer Terminals .....................................................20
6 Operation Elements ...........................................................................................................22
6.1 Mains Input, Fuse and Mains Switch ...........................................................................22
6.2 Ethernet Interface .......................................................................................................22
6.3 USB Interfaces (1x Host, 2x Device) ...........................................................................22
6.4 Safety Indicators .........................................................................................................22
6.5 Protective Earth Terminal ...........................................................................................23
6.6 Emergency Stop .........................................................................................................23
90297-0.22 Instruction Manual mini-ATOS Page 2 of 92