ДСТУ CLC/TS 61643-12:2015 Устройства защиты от импульсных перенапряжений низковольтные. Часть 12. Устройства защиты от импульсных перенапряжений, подключенные к низковольтным распределительным системам. Принц...

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CLC/TS 61643-12:2009

Low-voltage surge protective devices -
Part 12: Surge protective devices connected to low-voltage power distribution systems -
Selection and application principles

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ДСТУ CLC/TS 61643-12:2015
(CLC/TS 61643-12:2009, IDT)

Пристрої захисту від імпульсних перенапруг низьковольтні. Частина 12.
Пристрої захисту від імпульсних перенапруг, підключені до низьковольтних
розподільчих систем. Принципи вибору та застосування

З наданням чинності від 2016-01-01

Contents

0 Introduction

0.1 General

0.2 Keys to understanding the structure of this Technical Specification

1 Scope

2 Normative references

3 Terms, definitions and abbreviated terms

3.1 Terms and definitions

3.2 List of variables and abbreviations used in this Technical Specification

4 Systems and equipment to be protected

4.1 Low-voltage power distribution systems

4.2 Characteristics of the equipment to be protected

5 Surge protective devices

5.1 Basic functions of SPDs

5.2 Additional requirements

5.3 Classification of SPDs

5.4 Characteristics of SPDs

5.5 Additional information on characteristics of SPDs

6 Application of SPDs in low-voltage power distribution systems

6.1 Installation and its effect on the protection given by SPDs

6.2 Selection of SPD

6.3 Characteristics of auxiliary devices

7 Risk analysis

8 Co-ordination where equipment has both signalling and power terminals

Annex A (informative) Examples of various SPD technologies

A.1 Examples of internal circuits for one port and two port SPDs

A.2 Response of SPDs to a combination wave impulse

Annex B (informative) Explanation of testing procedures used in EN 61643-11

B.1 Determination of U res for SPDs tested in accordance with class I and class II tests

B.2 Impulse waveshape for assessment of U res

B.3 Influence of a back filter on determination of U res

B.4 Operating duty test for SPDs

B.5 TOV failure test

B.6 Differences in the testing conditions of Type 1 (test class I), 2 (test class II) and 3 (tests class III) SPDs

B.7 Short-circuit withstand capability test in conjunction with overcurrent protection (if any)

Annex C (informative) Partial lightning current calculations

Annex D (informative) Examples of application of CLC/TS 61643-12

D.1 Domestic application

D.2 Industrial application

D.3 Presence of a lightning protection system

Annex E (informative) Examples of application of the risk analysis

Annex F (informative) Consideration for SPDs when Type 1 SPDs are to be applied

Annex G (informative) Immunity versus insulation withstand

Annex H (informative) Examples of SPD installation in power distribution boards in some countries

Annex I (informative) Short circuit backup protection and surge withstand

I.1 Introduction

I.2 Information single shot 8/20 and 10/350 fuses withstand

I.3 Fuse influencing factors (reduction) for preconditioning and operating duty test

I.4 Specific examples with estimated range of factors for reduction of single shot fuse withstand

Annex J (informative) SPD coordination test principles

J.1 Introduction

J.2 Coordination criteria

J.3 Coordination techniques

J.4 Coordination test

Annex K (informative) Simple calculation of I imp for a Type 1 SPD in case of a building protected by a LPS

Bibliography

Figures

Figure 1 – Examples of components and combinations of components

Figure 2 – Relationship between U p , U 0 , U c and U cs

Figure 3 – Typical curve of U res versus I for ZnO varistors

Figure 4 – Typical curve for a spark gap

Figure 5 – Flowchart for SPD application

Figure 6 – Connection Type 1

Figure 7 – Connection Type 2

Figure 8 – Influence of SPD connecting lead lengths

Figure 9 – Need for additional protection

Figure 10 – Flowchart for the selection of an SPD

Figure 11 – Typical use of two SPDs – Electrical drawing

Figure A.1 – Examples of one-port SPDs

Figure A.2 – Examples of two-port SPDs

Figure A.3 – Response of one-port and two-port SPDs to a combination wave impulse

Figure B.1 – Test setting

Figure C.1 – Simple calculation of the sum of partial lightning currents into the power distribution system

Figure D.1 – Domestic installation

Figure D.2 – Industrial installation

Figure D.3 – Industrial installation circuitry

Figure D.4 – Example for a lightning protection system

Figure E.1 – HV and LV overhead lines

Figure E.2 – HV overhead line and buried LV lines

Figure E.3 – HV and LV buried lines

Figure E.4 – HV line overhead

Figure F.1 – General distribution of lightning current

Figure H.1 – Wiring diagram of an SPD connected on the load side of the main incoming isolator via a separate isolator (which could be included in SPD enclosure)

Figure H.2 – SPD connected to the nearest available outgoing way (MCB) to the incoming supply (TNS installation typically seen in the UK)

Figure H.3 – Single line-wiring diagram of an SPD connected in shunt on the first outgoing way of the distribution panel via a fuse (or MCB)

Figure J.1 – SPDs arrangement for the coordination test

Tables

Table 1 – Maximum TOV values as given in IEC 60364-4-44

Table 2 – Preferred values of I imp

Table 3 – Possible modes of protection for various LV systems

Table 4 – Minimum required U c of the SPD dependent on supply system configuration

Table 5 – Typical TOV test values

Table I.1 – Examples of ratio between single shot withstand and full preconditioning/operating duty test

Table J.1 – Test procedure for coordination

Table K.1 – Determination of the value of I imp on the AC side of PV generators