IEC 62151 : 1.0

Table of Contents

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Definitions
4 TNV circuits
      4.1 TNV-0 circuits
      4.2 TNV-1, TNV-2 and TNV-3 circuits
5 Protection of telecommunication network service
      personnel, and users of other equipment connected to
      the network, from hazards in the equipment
      5.1 General
      5.2 Use of protective earthing
      5.3 Separation of the telecommunication network
             from earth
      5.4 Limitation of the touch current to a
             telecommunication network
6 Protection of equipment users from overvoltages on
      telecommunication networks
      6.1 Separation requirements
      6.2 Electric strength test procedure
7 Protection of the telecommunication wiring system from
      overheating
Annex A (normative) Criteria for telephone ringing signals
                    (see.4.2.1.1)
Annex B (normative) Impulse test generator (see 6.2.1)
Annex C (informative) Procedure for impulse testing (see
                      6.2.3)
Bibliography
Figure 1 - Maximum voltages permitted after a single fault
Figure 2 - Test generator
Figure 3 - Test probe
Figure 4 - Test for separation between a telecommunication
           network and earth
Figure 5 - Test circuit for touch current of single-phase
           equipment on a star TN to TT power supply system
Figure 6 - Test circuit for touch current of three-phase
           equipment on a star TN or TT power supply system
Figure 7 - Application points of test voltage
Figure A.1 - Definition of ringing period and cadence cycle
Figure A.2 - ITS1 limit curve for cadenced ringing signal
Figure A.3 - Peak and peak-to-peak currents
Figure A.4 - Ringing voltage trip criteria
Figure B.1 - Impulse generating circuit
Figure C.1 - Waveform on insulation without surge suppressors
             and no breakdown
Figure C.2 - Waveforms on insulation during breakdown without
             surge suppressors
Figure C.3 - Waveforms on insulation with surge suppressors
             in operation
Figure C.4 - Waveform on short-circuited surge suppressor and
             insulation
Table 1 - Voltage ranges of TNV circuits
Table 2 - Separation of TNV circuits

Abstract

Applies to equipment that is designed and meant to be connected directly to a telecommunication network, regardless of the source of power. It is meant for the enhancement of product safety standards to cover hazards that are associated only with connection of equipment to a telecommunication network.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	International Electrotechnical Committee
Pages
ISBN
Committee	TC 74
Supersedes	IEC GUIDE 105 : 1ED 85