Low-voltage electrical installations - Part 5-53: Selection and erection of electrical equipment - Switchgear and controlgear

This part of HD 60364 deals with general requirements for isolation, switching, control and monitoring and with the requirements for selection and erection of the devices provided to fulfil such functions

Errichten von Niederspannungsanlagen - Teil 5-53: Auswahl und Errichtung elektrischer Betriebsmittel - Schalt- und Steuergeräte

Installations électriques basse tension - Partie 5-53: Choix et mise en œuvre des matériels électriques - Appareillage

La présente partie du HD 60364 traite des exigences générales relatives au sectionnement, à la coupure, à la commande et à la surveillance, ainsi que des exigences relatives au choix et à la mise en œuvre des dispositifs assurant ces fonctions.

Nizkonapetostne električne inštalacije - 5-53. del: Izbira in namestitev električne opreme - Stikalne in krmilne naprave (verzija EN osnove november 2015)

Ta del standarda HD 60364 obravnava splošne zahteve za ločevanje, preklapljanje, krmiljenje in nadzor ter zahteve za izbiro in namestitev naprav, ki te funkcije opravljajo.

General Information

Status
Published
Publication Date
08-Dec-2015
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
02-Dec-2015
Due Date
06-Feb-2016
Completion Date
09-Dec-2015

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SLOVENSKI STANDARD
SIST HD 60364-5-53:2016
01-januar-2016
1DGRPHãþD
SIST HD 50573-5-57:2014
SIST HD 60364-5-53:2015

1L]NRQDSHWRVWQHHOHNWULþQHLQãWDODFLMHGHO,]ELUDLQQDPHVWLWHYHOHNWULþQH

RSUHPH6WLNDOQHLQNUPLOQHQDSUDYH YHU]LMD(1RVQRYHQRYHPEHU

Low-voltage electrical installations - Part 5-53: Selection and erection of electrical

equipment - Switchgear and controlgear

Errichten von Niederspannungsanlagen - Teil 5-53: Auswahl und Errichtung elektrischer

Betriebsmittel - Schalt- und Steuergeräte

Installations électriques basse tension - Partie 5-53: Choix et mise en œuvre des

matériels électriques - Appareillage
Ta slovenski standard je istoveten z: HD 60364-5-53:2015
ICS:
29.130.01 Stikalne in krmilne naprave Switchgear and controlgear
na splošno in general
91.140.50 Sistemi za oskrbo z elektriko Electricity supply systems
SIST HD 60364-5-53:2016 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST HD 60364-5-53:2016
HARMONIZATION DOCUMENT HD 60364-5-53
DOCUMENT D'HARMONISATION
HARMONISIERUNGSDOKUMENT
November 2015
ICS 91.140.50, 29.120.50 Supersedes HD 50573-5-57:2014, HD 60364-5-53:2015
English Version
Low-voltage electrical installations - Part 5-53: Selection and
erection of electrical equipment - Switchgear and controlgear

Installations électriques basse tension - Partie 5-53: Choix Errichten von Niederspannungsanlagen - Teil 5-53:

et mise en œuvre des matériels électriques - Appareillage Auswahl und Errichtung elektrischer Betriebsmittel - Schalt-

und Steuergeräte

This Harmonization Document was approved by CENELEC on 2015-07-17. CENELEC members are bound to comply with the

CEN/CENELEC Internal Regulations which stipulate the conditions for implementation of this Harmonization Document at national level.

Up-to-date lists and bibliographical references concerning such national implementations may be obtained on application to the CEN-

CENELEC Management Centre or to any CENELEC member.

This Harmonization Document exists in three official versions (English, French, German).

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,

Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. HD 60364-5-53:2015 E
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HD 60364-5-53:2015
European foreword

This document (HD 60364-5-53:2015) has been prepared by CLC/TC 64 "Electrical installations and

protection against electric shock".
The following dates are fixed:
(dop) 2016-07-17
• latest date by which this document h
as to be implemented at national
level by publication of an identical
national standard or by endorsement
(dow) 2018-07-17
• latest date by which the national
standards conflicting with this
document have to be withdrawn
This document supersedes HD 60364-5-53:2015 and HD 50573-5-57:2014.

Attention is drawn to the possibility that some of the elements of this document may be the

subject of patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying

any or all such patent rights.
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HD 60364-5-53:2015
530 Introduction
530.1 Scope

This part of HD 60364 deals with general requirements for isolation, switching, control and

monitoring and with the requirements for selection and erection of the devices provided to

fulfil such functions.
530.2 Normative references

HD 384.4.46 S2, Electrical installations of buildings - Part 4: Protection for safety - Chapter

46: Isolation and switching

HD 384.5.537 S2, Electrical installations of buildings - Part 5: Selection and erection of

electrical equipment - Chapter 53: Switchgear and controlgear - Section 537: Devices for

isolation and switching

HD 50573-5-57, Co-ordination of electrical equipment for protection, isolation, switching and

control
EN 60269 (all parts), Low-voltage fuses (IEC 60269, all parts)

HD 60364-1, Low-voltage electrical installations - Part 1: Fundamental principles, assessment

of general characteristics, definitions (IEC 60364-1)

HD 60364-4-41, Low-voltage electrical installations - Part 4-41: Protection for safety -

Protection against electric shock (IEC 60364-4-41)

HD 60364-4-42, Low voltage electrical installations - Part 4-42: Protection for safety -

Protection against thermal effects (IEC 60364-4-42)

HD 60364-4-43:2010, Low-voltage electrical installations – Part 4-43: Protection for safety –

Protection against overcurrent (IEC 60364-4-43:2008, mod. + corrigendum Oct. 2008)

HD 60364-5-51:2009, Electrical installations of buildings – Part 5-51: Selection and erection

of electrical equipment – Common rules (IEC 60364-5-51:2005, mod.)

HD 60364-5-534, Low-voltage electrical installations - Part 5-53: Selection and erection of

electrical equipment - Isolation, switching and control - Clause 534: Devices for protection

against overvoltages (IEC 60364-5-534)

EN 60669-2-2, Switches for household and similar fixed electrical installations – Part 2-2:

particular requirements – Electromagnetic remote-control switches (RCS) (IEC 60069-2-2)

EN 60669-2-4, Switches for household and similar fixed electrical installations – Part 2-4:

particular requirements – Isolating switches (IEC 60669-2-4)

EN 60670 (all parts), Boxes and enclosures for electrical accessories for household and

similar fixed electrical installations (IEC 60670, all parts)

EN 60898-1, Electrical accessories - Circuit breakers for overcurrent protection for household

and similar installations - Part 1: Circuit-breakers for a.c. operation (IEC 60898-1)

EN 60898-2, Electrical accessories - Circuit-breakers for overcurrent protection for household

and similar installations - Part 2: Circuit-breakers for a.c. and d.c. operation (IEC 60898-2)

EN 60947-1, Low-voltage switchgear and controlgear – Part 1: General rules (IEC 60947-1)

EN 60947-2:2006, Low-voltage switchgear and controlgear - Part 2: Circuit-breakers

(IEC 60947-2:2006)

EN 60947-3, Low-voltage switchgear and controlgear - Part 3: Switches, disconnectors,

switch-disconnectors and fuse-combination units (IEC 60947-3)
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EN 60947-4-1, Low-voltage switchgear and controlgear – Part 4-1: Contactors and motor-

starters – Electromechanical contactors and motor starters (IEC 60947-4-1)

EN 60947-6-1, Low-voltage switchgear and controlgear – Part 6-1: multiple function

equipment – Transfer Switching Equipment (IEC 60947-6-1)

EN 60947-6-2, Low-voltage switchgear and controlgear - Part 6-2: Multiple function equipment

- Control and protective switching devices (or equipment) (CPS) (IEC 60947-6-2)

EN 61008-1, Residual current operated circuit-breakers without integral overcurrent protection

for household and similar uses (RCCBs) - Part 1: General rules (IEC 61008-1)

EN 61008-2-1, Residual current operated circuit-breakers without integral overcurrent

protection for household and similar uses (RCCB's) - Part 2-1: Applicability of the general

rules to RCCB's functionally independent of line voltage (IEC 61008-2-1)

EN 61009-1, Residual current operated circuit-breakers with integral overcurrent protection

for household and similar uses (RCBOs) - Part 1: General rules (IEC 61009-1)

EN 61009-2-1, Residual current operated circuit-breakers with integral overcurrent protection

for household and similar uses (RCBO's) - Part 2-1: Applicability of the general rules to

RCBO's functionally independent of line voltage (IEC 61009-2-1)

EN 61095, Electromechanical contactors for household and similar purposes (IEC 61095)

EN 61439 (all parts), Low-voltage switchgear and controlgear assemblies (IEC 61439, all

parts)

EN 61557-8, Electrical safety in low voltage distribution systems up to 1 000 V a.c. and

1 500 V d.c. - Equipment for testing, measuring or monitoring of protective measures - Part 8:

Insulation monitoring devices for IT systems (IEC 61557-8)

EN 61557-9, Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500

V d.c. - Equipment for testing, measuring or monitoring of protective measures - Part 9:

Equipment for insulation fault location in IT systems (IEC 61557-9)

EN 62020, Electrical accessories - Residual current monitors for household and similar uses

(RCMs) (IEC 62020)

EN 62208, Empty enclosures for low-voltage switchgear and controlgear assemblies - General

requirements (IEC 62208)

EN 62423, Type F and type B residual current operated circuit-breakers with and without

integral overcurrent protection for household and similar uses (IEC 62423)
EN 62606, General requirements for arc fault detection devices (IEC 62606)
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530.3 Terms and definitions
530.3.1
control
1) deliberate action resulting in the operation of an apparatus;
2) a device which initiates the operation of an apparatus
[SOURCE: IEV 821-01-28]
530.3.2
isolation

function intended to make dead for reasons of safety all or a discrete section of the electrical

installation by separating the electrical installation, or section, from every source of electric

energy
[SOURCE: IEV 826-17-01]
530.3.3
monitor, verb

acquire a quantity value continuously or sequentially in order to check whether it is within

normal operating limits and, where appropriate, to signal if it passes its tolerance boundaries

[SOURCE: IEV 351-43-03]
530.3.4
switching
function intended to make or break the current in one or more electric circuits
530.3.5
co-ordination of electrical equipment

correct way of selecting electrical devices in series to ensure safety and continuity of service

of the installation taking into account short-circuit protection and/or overload protection and/or

selectivity
530.3.6
safety of electrical installation

safety of human, livestock and property against danger and damage which may arise in the

reasonable use of electrical installations and which is covered by measures for:
– protection against electric shock;
– protection against thermal effects;
– protection against overcurrent;
– protection against fault currents;
– protection against voltage disturbances and measures against o electromagnetic
influences;

– protection against power supply interruption where danger or damage is expected

Note 1 to entry: Continuity of supply may be necessary for certain circuits (e.g. circuits in medical locations,

circuits supplying emergency systems).
530.3.7
continuity of service

quality of an installation which is expressed by the extent to which the operation of an

electrical system approaches the ideal state of freedom from interruption, or which the

operation of electrical system minimizes supply interruption thanks to co-ordination of

electrical devices
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530.3.8
back-up protection

overcurrent co-ordination, in short-circuit conditions, of an OCPD in series with another

electrical device where the OCPD, generally but not necessarily on the supply side, effects

the overcurrent protection and prevents any excessive stress on the electrical device

Note 1 to entry: Back-up protection does not cover the combined short-circuit protection.

530.3.9
combined short-circuit protection

overcurrent co-ordination, in short-circuit conditions, of two OCPDs in series, resulting in a

combined short-circuit current capability higher than one OCPD alone
530.3.10
combined short-circuit capability

maximum short-circuit current which can be handled by two short-circuit protective devices in

series
530.3.11
selectivity

co-ordination of the operating characteristics of two or more protective devices such that, on

the incidence of overcurrents or residual currents within stated limits, the device intended to

operate within these limits does so, while the other(s) does (do) not
[SOURCE: IEV 441-17-15, modified]

Note 1 to entry: Distinction is made between series selectivity involving different overcurrent protective

devices passing substantially the same overcurrent and network selectivity involving protective devices passing

different proportions of the overcurrent.
530.3.12
total selectivity

selectivity where only the OCPD on the load side will operate up to the maximum prospective

short-circuit current at its point of installation
530.3.13
partial selectivity

selectivity where the OCPD on the load side only will operate up to a fault current (the

selectivity limit current) less than the maximum prospective short-circuit current at its point of

installation
530.3.14
overcurrent protective device (OCPD)

device provided to interrupt an electric circuit in case the conductor current in the electric

circuit exceeds a predetermined value for a specified duration
[SOURCE: IEV 826-14-14]

Note 1 to entry: Table 536.2 provides information regarding the different devices corresponding to the main

generic function.
530.3.15
short-circuit protective device (SCPD)

device intended to protect a circuit or parts of a circuit against short-circuit currents by

interrupting them
[SOURCE: EN 60947-1]

Note 1 to entry: Table 536.2 provides information regarding the different devices corresponding to the main

generic function.
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530.3.16
circuit-breaker

mechanical switching device, capable of making, carrying and breaking currents under normal

circuit conditions and also making, carrying for a specified time and breaking currents under

specified abnormal circuit conditions such as those of short circuit
[SOURCE: IEV 441-14-20]

Note 1 to entry: Table 536.2 provides information regarding the different devices corresponding to the main

generic function.
530.3.17
switch
device for changing the electric connections among its terminals
[SOURCE: IEV 151-12-22]
530.3.18
residual current device (RCD)

mechanical switching device designed to make, carry and break currents under normal

service conditions and to cause the opening of the contacts when the residual current attains

a given value under specified conditions

Note 1 to entry: A residual current device can be a combination of various separate elements designed to

detect and evaluate the residual current and to make and break current.

Note 2 to entry: RCD includes devices such as RCCB, RCBO, CBR and MRCD. Table 536.2 provides

information regarding the different devices corresponding to the main generic function.

[SOURCE: IEV 442-05-02, modified]
530.3.19
fuse

device that by the fusing of one or more of its specially designed and proportioned

components, opens the circuit in which it is inserted by breaking the current when this

exceeds a given value for a sufficient time. The fuse comprises all the parts that form the

complete device
[SOURCE: IEV 441-18-01]
530.3.20
contactor

mechanical switching device having only one position of rest, operated otherwise than by

hand, capable of making, carrying and breaking currents under normal circuit conditions

including operating overload conditions
[SOURCE: IEV 441-14-33]
530.3.21
overload relay
overcurrent relay or release intended for protection against overloads
[SOURCE: EN 60947-1]
530.3.22
control and protective switching device (CPS)

switching device (or equipment) capable of operation other than by hand, but with or without

local manual operating means. A CPS device provides both functions of contactor and OCPD

[SOURCE: EN 60947-6-2 modified]
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530.3.23
conditional short-circuit current

prospective current that a circuit or a switching device, protected by a specified short-circuit

protective device, can satisfactorily withstand for the total operating time of that device under

specified conditions of use and behaviour
[SOURCE: EN 60947-1]
530.3.24
desk study

assessment of behaviour of devices connected in series, taking into account all relevant

parameters delivered by manufacturer such as:
– design current;
– prospective short-circuit or fault current;
– operating time of devices;
– system voltage;
– energy (let through I²t values);
– peak let through current
530.4 General and common requirements

530.4.1 Every item of equipment shall be selected and erected so as to allow compliance with

the requirements stated in the following clauses of this part as well as the fundamental

principles of HD 60364-1 and the relevant rules in other parts of the HD 60364 series.

530.4.2 The moving contacts of all poles of multipole devices for isolation and switching shall

be so coupled mechanically that they make and break substantially together.

The moving contacts of multipole switching devices marked for the connection of the neutral

or mid-point may close before and open after the other contacts.
530.4.3 A switching device shall not be inserted in the neutral conductor alone.

530.4.4 Devices embodying more than one function, as defined in the following clauses, shall

comply with the relevant requirements of this part appropriate to each separate function.

530.4.5 Equipment intended for protection only shall not be provided for functional switching

of circuits.

NOTE Functional switching does not include disconnection and isolation of circuits for the purposes of testing

servicing and maintenance.
530.5 Fixing of equipment

530.5.1 Equipment shall be erected according to the manufacturer’s instructions in such a

way that connections between wiring and equipment shall not be subject to undue stress or

strain resulting from the foreseen use of the equipment.

530.5.2 Unenclosed type equipment shall be mounted in a suitable mounting box or enclosure

in compliance with EN 60670, EN 62208 or other relevant standard like EN 61439.

530.5.3 Equipment such as circuit breakers, switches, socket outlets, control equipment, etc.

may be installed in or on a cable trunking system in accordance with EN 50085 series.

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531 Devices for protection against electric shock by automatic disconnection
of supply
531.1 General

Devices for protection against electric shock by automatic disconnection of supply shall be

suitable for isolation in accordance with HD 384.4.46 S2 and Clause 537.

Automatic re-closing of devices for protection against electric shock by automatic

disconnection of supply is permitted in installations where access is restricted to electrically

instructed persons (BA4) or skilled persons (BA5) only.

NOTE Automatic re-closing of devices used for continuity of supply may also be used according to local or National

wiring rules for installations were access is permitted to ordinary persons (BA1) or children (BA2) or handicapped

persons (BA3) provided assessment means according to 4.3.2 of EN 50557:2011 are complied with.

Requirements for the selection of devices for protection against electric shock by automatic

disconnection of supply are given in the following sections:
In TN, TT and IT systems the following protective devices may be used:
– overcurrent protective devices in accordance with 531.2;
– residual current devices (RCDs) in accordance with 531.3.

Devices according to EN 60947-2 marked with the voltage value followed by the symbol

shall not be used in IT systems for such voltage.

In addition, in IT-systems the following monitoring devices may be used to detect insulation

fault conditions:
– Insulation monitoring devices (IMDs) in accordance with 538.1;
– equipment for insulation fault location in accordance with 538.2;
– residual current monitors (RCMs) in accordance with 538.4.
531.2 Overcurrent protective devices
531.2.1 General

Where overcurrent protective devices are used for the protection against electric shock by

automatic disconnection of supply they shall be selected in accordance with 533.
531.2.2 TN systems

In TN systems overcurrent protective devices when used as devices for fault protection shall

be selected and erected in order to comply with the requirements specified in Part 4-41 (see

in particular sub-clause 411.4.4).

If for certain equipment or for certain parts of the installation, the maximum tripping time of

the Table 41A cannot be fulfilled by the overcurrent protective devices, those parts shall be

protected by a residual current device (RCD) in compliance with 531.3.5.2.

In TN-S systems, the neutral need not be disconnected if the supply conditions are such that

the neutral conductor can be considered to be reliably at earth potential.
In TN-C systems, the PEN conductor shall not be disconnected.
531.2.3 TT systems

In TT systems, overcurrent protective devices may be used for fault protection provided that a

suitably low value of Z is permanently and reliably assured (see also 411.5.4 of Part 4-41) so

that in case of a fault, tripping of the overcurrent protective device in compliance with the

required disconnection times is ensured.
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531.2.4 IT systems

Overcurrent protective devices when used as devices for fault protection, in the event of a

second fault, shall comply with:

– 531.2.2, taking into account the requirements of 411.6.4.a) of Part 4-41, where exposed-

conductive-parts are interconnected; or

– 531.2.3, taking into account the requirements of 411.6.4.b) of Part 4-41, where exposed-

conductive-parts are earthed in groups or individually.

In IT systems, if disconnection required by part 4-41 in the event of the second fault to earth

cannot be achieved by an overcurrent protective device, one or more residual current devices

(RCDs) shall be used to provide the required fault protection within the installation.

NOTE Reference is also made to 411.3.2.6 where supplementary protective equipotential bonding is required in

those cases where automatic disconnection according to 411.3.2.1 cannot be achieved.

Overcurrent protective devices used in IT systems shall have line poles suitable for line-to-

line voltage applications and a neutral pole, if applicable, suitable for the line to neutral

voltage for operation in case of a second insulation fault.

In IT systems, in the event of a second fault, the operation of the overcurrent protective

device shall result in the disconnection of all corresponding live conductors, including the

neutral conductor, if any (see also 431.2.2 of Part 4-43).
531.3 Residual current devices (RCDs)
531.3.1 General

A residual current device shall ensure the disconnection of all live conductors of the circuit

protected.

The protective conductor shall not pass through the sensor of the residual current device

(RCD) beside exceptional cases, where passing through the sensor is unavoidable, e.g. in

case of armoured cables. In such exceptional cases the protective conductor alone has to be

passed again through the sensor but in the reverse direction. The protective conductor shall

be insulated and shall not be earthed neither at the first nor at the second passing through the

sensor.

A protective conductor current shall not contribute to the measurement of the residual current.

531.3.2 Unwanted tripping

Residual current protective devices shall be so selected and erected to limit the risk of

unwanted tripping. The following shall be considered:

– subdivision of circuits with individual associated residual current devices (RCDs). RCDs

shall be selected and the electrical circuits shall be subdivided in such a way that any

earth-leakage current likely to occur during normal operation of the connected load, will

not cause unwanted tripping of the device. See also Clause 314 of HD 60364-1.

In order to avoid unwanted tripping by protective conductor currents and/or earth leakage

currents the accumulation of such currents downstream the residual current device (RCD)

shall be not more than 0,3 times the rated residual operating current.

NOTE 1 This will also allow a better selection of the type of residual current devices (RCDs) according to the

nature of the circuit or the load.

NOTE 2 Residual current devices (RCDs) may operate at any value of residual current in excess of 50 % of the

rated residual current.

– use of short time-delayed residual current devices (RCDs) provided the applicable

requirements of HD 60364-4-41 are met.

NOTE 3 In the case of transient effects tripping of the residual current protective device may occur by charging of

bypass capacitors or by other electromagnetic disturbances.
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– coordination of general type residual current devices (RCDs), selective type RCDs and

time delayed RCDs (CBRs according to EN 60947-2) as covered in subclause 536
(currently covered in HD 50573-5-57).

– coordination of residual current devices (RCDs) with surge protective devices (SPD)

according subclause 534.2.6.
531.3.3 Types of RCDs

Different types of residual current devices (RCDs) exist depending on their behaviour in the

presence of d.c. components and frequencies other than the rated frequency:

– RCD Type AC: RCD tripping on alternating sinusoidal residual current, suddenly applied or

smoothly increasing.

– RCD Type A: RCD tripping on alternating sinusoidal residual current and on residual

pulsating direct current, suddenly applied or smoothly increasing.

NOTE 1 For RCD Type A tripping is ensured for residual pulsating direct currents superimposed on a smooth direct

current up to 0,006 A.
– RCD Type F: RCD for which tripping is ensured as for Type A and in addition:

– for composite residual currents, whether suddenly applied or slowly rising intended for

circuit supplied between phase and neutral or phase and earthed middle conductor;

– for residual pulsating direct currents superimposed on smooth direct current.

NOTE 2 For RCD Type F tripping is ensured for residual pulsating direct currents superimposed on a smooth direct

current up to 0,010 A.
– RCD Type B: RCD for which tripping is ensured as for Type F and in addition:
– for residual sinusoidal alternating currents up to 1 000 Hz;
– for residual alternating currents superimposed on a smooth direct current;

– for residual pulsating direct currents superimposed on a smooth direct current;

– for residual pulsating rectified direct current which results from two or more phases;

– for residual smooth direct currents whether suddenly applied or slowly increased

independent of polarity.

NOTE 3 For RCD Type B tripping is ensured for residual pulsating direct currents superimposed on a smooth direct

current up to 0,006 A.
For general purpose, type AC RCD may be used.

NOTE 4 For a guidance for the correct use of residual current operated protective devices for household and

similar use, see IEC/TR 62350.

NOTE 5 Some typical fault currents in circuits comprising semiconductors are given in the Informative Annex A.

531.3.4 Selection according to the accessibility to the installation

531.3.4.1 In a.c. installations where residual current devices (RCDs) are accessible to

ordinary persons (BA1), children (BA2) or handicapped persons (BA3) residual current

protective devices shall comply with:
– EN 61008-1 and EN 61008-2-1 for RCCBs; or
– EN 61009-1 and EN 61009-2-1 for RCBOs; or
– EN 62423 for RCCBs and RCBOs.

NOTE RCCB is a Residual Current operated Circuit Breaker without integral overcurrent protection. RCBO is a

Residual Current operated Circuit Breaker with integral overcurrent protection.

531.3.4.2 In a.c. installations where residual current devices (RCDs) are accessible only to

instructed persons (BA4) or skilled persons (BA5) residual current protective devices shall

comply with:
– EN 61008-1 and EN 61008-2-1 for RCCBs; or
– EN 61009-1 and EN 61009-2-1 for RCBOs; or
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SIST HD 60364-5-53:2016
HD 60364-5-53:2015
– EN 62423 for RCCBs and RCBOs; or
– EN 60947-2 for CBRs and MRCDs.

NOTE CBR is a circuit-breaker incorporating residual current protection. MRCD is a modular residual current

device.
531.3.5 Residual current devices (RCDs) for fault protection
531.3.5.1 General

The use of residual current devices (RCDs) shall ensure the protection against fault in

compliance with 411.3 of Part 4-41.

The selection of residual current devices (RCDs) depends on the type of earthing system (see

531.3.5.2, 531.3.5.3 and 531.3.5.4).
531.3.5.2 TN system
Residual current devices (RCDs) shall be erected at the origin of that part
...

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