Table of Contents

Introduction
1 General
1.1 Scope
1.2 SPD configurations
1.3 Use of this Standard
2 Normative references
3 Definitions
3.1 model number
3.2 preferred values
3.3 overstressed fault mode
3.4 protection
3.5 current response time
3.6 maximum continuous operating voltage U[c]
3.7 maximum interrupting voltage
3.8 surge protective device (SPD)
3.9 voltage limiting
3.10 current limiting
3.11 non-resettable current limiting
3.12 resettable current limiting
3.13 self-resetting current limiting
3.14 voltage-clamping-type SPD
3.15 voltage-switching-type spd
3.16 voltage protection level U[p]
3.17 multi-stage SPD
3.18 blind spot
3.19 a.c. durability
3.20 impulse durability
3.21 current reset time
3.22 rated current
3.23 insulation resistance
3.24 return loss
3.25 bit error ratio (BER)
3.26 insertion loss
3.27 near-end crosstalk (NEXT)
3.28 longitudinal balance (analogue voice frequency circuits)
3.29 longitudinal balance (data transmission)
3.30 longitudinal balance (communication and control cables)
3.31 longitudinal balance (telecommunications)
4 Service and test conditions
4.1 Service conditions
4.2 Test temperature and humidity
4.3 SPD testing
4.4 Waveform tolerances
5 Requirements
5.1 General requirements
5.2 Electrical requirements
5.3 Mechanical requirements
5.4 Environmental requirements
6 Type tests
6.1 General tests
6.2 Electrical tests
6.3 Mechanical tests
6.4 Environmental tests
6.5 Acceptance tests
Annex A (informative) Devices with current-limiting
components only
Annex B (informative) Selection of applicable transmission tests
Annex C (normative) Test sequence
Bibliography

Abstract

Gives performance requirements and testing methods of surge protective devices connected to telecommunications and signalling networks with nominal system voltages up to 1000 V (r.m.s.) a.c. and 1500 V d.c. SPDs limit surge voltage caused by indirect and direct effects of lightning or other transient overvoltages and contain one or more non-linear components to divert surge currents.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	Japanese Standards Association
Pages
ISBN
Supersedes	JIS C 5381-21:2004