1
Scope
2 References
3 Definitions and abbreviations
3.1 Definitions
3.2 Abbreviations
3.3 Symbols
4 Overvoltage and overcurrent
conditions
5 Resistibility requirements (basic
and enhanced)
5.1 Basic resistibility requirement
5.2 Enhanced resistibility requirement
6 Equipment boundary
7 Test conditions
8 Protection coordination
8.1 General
8.2 Lightning
8.3 Power induction, earth potential
rise and power contact
8.4 Special test protector
8.4.1 Switching type protector
8.4.2 Clamping type protector
8.4.3 Multistage modules
9 Acceptance criteria
10 Tests
10.1 Symmetric pair port
10.1.1 Lightning voltage
10.1.2 Lightning current
10.1.3 Earth wire voltage drop
10.1.4 Power induction and earth potential rise
10.1.5 Mains power contact tests
10.2 Coaxial port
10.2.1 Lightning voltage
10.2.2 Lightning current
10.2.3 Lightning currents flowing on the shield
10.2.4 Power induction and earth potential rise
10.3 d.c. and a.c. dedicated power
feeding ports
10.3.1 Lightning voltage
10.3.2 Lightning current
10.3.3 Power induction and earth potential rise
10.3.4 Mains power contact
10.4 a.c. mains power port
10.4.1 Lightning voltage
10.4.2 Lightning current
10.4.3 Earth potential rise
10.4.4 Neutral potential rise
Annex A - Test
schematics
A.1 Introduction
A.2 Equipment and test schematics
A.2.1 Equipment ports
A.2.2 Test schematic
A.3 Test generators
A.4 Waveform generation
A.5 Test circuits including coupling,
decoupling and powering networks
A.5.1 Symmetric pair ports
A.5.2 Coaxial ports
A.5.3 a.c. or d.c. dedicated power feed ports
A.5.4 Mains power ports
A.6 Terminations
Appendix I -
Explanations which illustrate test conditions
I.1 Testing
I.1.1 General
I.1.2 Lightning surge tests
I.1.3 Power induction
I.1.4 Mains power contact
I.1.5 Terminations and SPDs on untested ports
I.1.6 Test connections for earthed and non-earthed equipment
I.2 Range of lightning and power
induction test levels
I.2.1 Lightning
I.2.2 Power induction test levels
I.3 Relationship between Recommendation K.44 and
other product/product family Recommendations
Appendix II -
Supplementary information for manufacturers and operators
II.1 Introduction
II.2 Primary protection coordination
II.2.1 Primary protection does not operate
II.2.2 Primary protection does operate
II.2.3 Principles of coordination
II.3 MDF voltage at the input of
equipment
II.3.1 General
II.3.2 MDF earth wire voltage drop
II.3.3 Earth voltage drop test
II.4 Current test on mains ports
II.5 Earth and neutral potential rise
II.5.1 Background
II.5.2 Explanation