INTRODUCTION
1 Scope
2 Normative references
3 Definitions
4 Test site
4.1 Test site environment
4.2 Test transformer
4.3 Earthed neutral conductor
5 Measuring equipment
5.1 Selection of measuring network
5.1.1 Perception and reaction (a.c.)
5.1.2 Lot-go (a.c.)
5.1.3 Electric burn (a.c.)
5.1.4 Ripple-free d.c.
5.2 Test electrodes
5.2.1 Construction
5.2.2 Connection
5.3 Configuration
5.4 Power connections during test
5.4.1 General
5.4.2 Equipment for use only on TN to TT
star power distribution systems
5.4.3 Equipment for use on IT power
distribution systems including
unearthed delta systems
5.4.4 Equipment for use on single-phase
centre-earthed power supply systems
or on centre-earthed delta power supply
systems
5.5 Supply voltage and frequency
5.5.1 Supply voltage
5.5.2 Supply frequency
6 Test procedure
6.1 General
6.1.1 Control switches, equipment and supply
conditions
6.1.2 Use of measuring networks
6.2 Normal and fault conditions of equipment
6.2.1 Normal operation of equipment
6.2.2 Equipment and supply fault conditions
7 Evaluation of results
7.1 Perception, reaction and let- go
7.2 Electric burn
8 Measurement of protective conductor current
8.1 General
8.2 Multiple equipment
8.3 Measuring method
Annex A (normative) Equipment
Annex B (normative) use of conductive plane
Annex C (normative) Incidentally connected parts
Annex D (informative) Choice of current limits
Annex E (informative) Networks for use in measurement of
touch current
Annex F (informative) Measuring network limitations and
construction
Annex G (informative) Construction and application of touch
current measuring instruments
Annex H (informative) Grippable part
Annex J (informative) AC power distribution systems (see 5.4)
Annex K (informative) Routine and periodic touch current
tests, and tests after repair or
modification of mains operated equipment
Annex L (normative) Performance and calibration
Annex M (informative) Bibliography
Annex ZA (normative) Normative references to international
publications with their corresponding
European publications
Figure 1 - Example of earthed neutral, direct supply
Figure 2 - Example of earthed neutral, with transformer for
isolation
Figure 3 - Measuring network, unweighted touch current
Figure 4 - Measuring network, touch current weighted for
perception or reaction
Figure 5 - Measuring network, touch current weighted for
let-go
Figure 6 - Test configuration: single-phase equipment on
star TN or TT system
Figure 7 - Test configuration: single-phase equipment on
centre-earthed TN or TT system
Figure 8 - Test configuration: single-phase equipment
connected line-to-line on star TN or TT system
Figure 9 - Test configuration: single-phase equipment
connected line-to-neutral on star IT system
Figure 10 - Test configuration: single-phase equipment
connected line-to-line on star IT system
Figure 11 - Test configuration: three-phase equipment on
star TN or TT system
Figure 12 - Test configuration: three-phase equipment on
star IT system
Figure 13 - Test configuration: unearthed delta system
Figure 14 - Test configuration: three-phase equipment on
centre-earthed delta system
Figure A.1 - Equipment
Figure B.1 - Equipment platform
Figure F.1 - Frequency factor for electric burn
Figure F.2 - Frequency factor for perception or reaction
Figure F.3 - Frequency factor for let-go
Figure H.1 - Grippable part test device
Figure J.1 - Examples of TN-S power system
Figure J.2 - Example of TN-C-S power system
Figure J.3 - Example of TN-C power system
Figure J.4 - Example of single-phase, 3- wire TN-C power
system
Figure K.5 - Example of 3-line and neutral TT power system
Figure J.6 - Example of 3-line TT power system
Figure J.7 - Example of 3-line (and neutral) IT power system
Figure J.8 - Example of 3-line IT power system
Table L.1 - Calculated input impedance and transfer impedance
for unweighted touch current measuring network
(Figure 3)
Table L.2 - Calculated input impedance and transfer impedance
for perception or reaction touch current measuring
network (Figure 4)
Table L.3 - Calculated input impedance and transfer impedance
for let-go current measuring network (Figure 5)
Table L.4 - Output voltage to input voltage ratios for
unweighted touch current measuring network
(Figure 3)
Table L.5 - Output voltage to input voltage ratios for
perception of reaction measuring network
(Figure 4)
Table L.6 - Output voltage to input voltage ratios for
let-go measuring network (Figure 5)