ДСТУ CLC/TS 61643-22:2015 Устройства защиты от импульсных перенапряжений низковольтные. Часть 22. Устройства защиты от импульсных перенапряжений, подключенные к низковольтным распределительным системам. Принц...

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CLC/TS 61643-22:2006

Low-voltage surge protective devices
Part 22: Surge protective devices connected to telecommunications
and signalling networks - Selection and application principles

прийнято як національний стандарт
методом «підтвердження» за позначенням
 

ДСТУ CLC/TS 61643-22:2015
(CLC/TS 61643-22:2006, IDT)

Пристрої захисту від імпульсних перенапруг низьковольтні. Частина 22. Пристрої
захисту від імпульсних перенапруг, підключені до низьковольтних розподільчих систем.
Принципи вибору та застосування

З наданням чинності від 2016–01–01

Contents

Introduction

1 Scope

2 Normative references

3 Terms and definitions

4 Description of technologies

4.1 Voltage-limiting devices

4.1.1 Clamping-type

4.1.2 Switching-type

4.2 Current-limiting devices

4.2.1 Current-interrupting type

4.2.2 Current-reducing type

4.2.3 Current-diverting type

5 Parameters for selection of SPDs and appropriate tests from EN 61643-21

5.1 Controlled and uncontrolled environments

5.1.1  Controlled environments

5.1.2  Uncontrolled environments

5.2 SPD parameters that may affect normal system operation

6 Risk management

6.1 Risk analysis

6.2 Risk identification

6.3 Risk treatment

7 Application of SPDs

7.1 General

7.2 Coupling mechanisms

7.3 Application, selection and installation of surge protective devices (SPDs)

7.3.1  Application requirements for SPDs

7.3.2  SPD installation cabling considerations

8 Multiservice surge protective devices

9 Coordination of SPDs/ITE

Annex A (informative) Voltage-limiting devices

A.1 Voltage-clamping devices

A.1.1  Metal oxide varistor (MOV)

A.1.2  Silicon semiconductors

A.2 Voltage-switching devices

A.2.1  Gas discharge tube (GDT)

A.2.2  Air gaps

A.2.3  Thyristor surge suppressor (TSS) – Fixed voltage types (self-gating)

Annex B (informative) Current-limiting devices

B.1 Current-interrupting devices

B.1.1  Fusible resistor

B.1.2  Fuses

B.1.3  Thermal fuses

B.2 Current-reducing devices

B.2.1  Polymer PTC (positive temperature coefficient resistor)

B.2.2  Ceramic PTC

B.2.3  Electronic current limiters

B.3 Current-diverting devices

B.3.1  Heat coils

B.3.2  Gated thyristor, current operated

B.3.3  Thermal switch

Annex C (informative) Risk management

C.1 Risk due to lightning discharges

C.1.1 Risk assessment

C.1.2  Risk analysis

C.1.3  Risk evaluation

C.1.4  Risk treatment

C.2  Risk due to power line faults

C.2.1  AC power systems

C.2.2  DC power systems

C.3  Earth potential rise

Annex D (informative) Transmission characteristics related to IT systems

D.1  Telecommunications systems

D.2  Signalling, measurement and control systems

D.3  Cable TV systems

Annex E (informative) Coordination of SPDs/ITE

E.1 Determination of UIN and IIN

E.2 Determine the output protective voltage and current waveforms for SPD 1

E.3 Compare SPD 1 and SPD 2 values

E.4 Necessity of verification of the coordination by testing

Figure 1 – SPD installation in telecommunications and signalling networks

Figure 2 – Coupling mechanisms

Figure 3 – Example of a configuration of the lightning protection concept

Figure 4 – Example of a configuration according to the zones (Figure 2)

Figure 5 – Example of protecting measures against common-mode voltages and differential mode voltages of the data (f) and supply voltage input (g) of an ITE

Figure 6 – Influence of the voltages U L1 and U L2 on the protection level U P caused by the inductance of the leads

Figure 7 – Removal of the voltages U L1 and U L2 from the protector unit by connecting leads to a common point

Figure 8 – Necessary installation conditions of a three, five or multi-terminal SPD with an ITE for minimizing the interference influences on the protection level

Figure 9 – Coordination of two SPDs

Figure A.1 – Circuit for voltage-clamping devices

Figure A.2 – Circuit for voltage-switching devices

Figure B.1 – Circuit for interrupting devices

Figure B.2 – Circuit for current-reducing devices

Figure B.3 – Circuit for current-diverting devices

Figure C.1 – Risk evaluation procedure

Figure E.1 – Coordination verification process

Table 1 – Responsibility for managing the protective measures

Table 2 – Coupling mechanisms

Table 3 – Selection aid for rating SPDs for the use in (zone) interfaces according to IEC 61312-1 and EN 61000-4-5

Table C.1 – AC overhead power systems

Table C.2 – AC underground electric cables

Table C.3 – DC overhead power systems

Table C.4 – DC underground electric cables

Table D.1 – Transmission characteristics for telecommunications systems in access networks

Table D.2 – Transmission characteristics of IT systems in customer premises

Table D.3 – Transmission characteristics of cable TV-systems