National foreword

This British Standard is the UK implementation of EN 50678:2020, incorporating corrigendum April 2021.

The start and finish of text introduced or altered by corrigendum is indicated in the text by tags. Text altered by CENELEC corrigendum April 2021 is indicated in the text by .

The UK participation in its preparation was entrusted to Technical Committee PEL/85, Measuring equipment for electrical and electromagnetic quantities.

A list of organizations represented on this committee can be obtained on request to its secretary.

Contractual and legal considerations

This publication has been prepared in good faith, however no representation, warranty, assurance or undertaking (express or implied) is or will be made, and no responsibility or liability is or will be accepted by BSI in relation to the adequacy, accuracy, completeness or reasonableness of this publication. All and any such responsibility and liability is expressly disclaimed to the full extent permitted by the law.

This publication is provided as is, and is to be used at the recipient’s own risk.

The recipient is advised to consider seeking professional guidance with respect to its use of this publication.

This publication is not intended to constitute a contract. Users are responsible for its correct application.

Compliance with a British Standard cannot confer immunity from legal obligations.

This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2020.

This European Standard was approved by CENELEC on 2019-12-16. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

European foreword

This document (EN 50678:2020) has been prepared by CLC/TC 85X “Measuring equipment for electrical and electromagnetic quantities”.

The following dates are fixed:

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

Introduction

This standard intends to provide a general test procedure to verify the effectiveness of the basic protective measures for current-using equipment or appliances after they have been repaired, thus ensuring the safety of people using repaired equipment.

This standard may be considered to support compliance with the European Directive 2009/104/EU concerning the minimum safety and health requirements for the use of work equipment by workers at work.

In general, the test procedure for verification of products after repair is the responsibility of the related product technical committees. This document may be taken into consideration by product technical committees if they need to take into consideration modified or additional tests for verification after repairs for products falling within their scope.

1 Scope

This document specifies requirements for setting a uniform procedure to verify the effectiveness of the protective measures for current-using equipment or appliances after they have been repaired.

This procedure is applicable to current-using equipment or appliances with a rated voltage above 25 V AC and 60 V DC up to 1 000 V AC and 1 500 V DC, and currents up to 63 A, connected to final circuits. They may be either pluggable equipment type A connected or permanently connected.

This document is not intended to replace test covered by safety standards nor product standards, for example type tests, routine tests and acceptance tests.

This document assumes that the current-using equipment or appliances under consideration complies with its related product standard, has been introduced on the market, has been in use, has failed, and has then been repaired.

It intends to verify that operations for repairs have not jeopardized basic protective measures, for example to verify the continuity of the protective conductor, the withstand capability of the insulation or to verify that no metallic part is loose or is inadvertently inserted in the device.

This document does not apply to:

recurrent tests defined in EN 50699; 1
devices and equipment that are part of the fixed electrical installations. For these, tests for verification after repair are covered by HD 60364-6;
audio/video, information and communication technology equipment;
uninterruptible Power Supply (UPS);
charging stations for electro-mobility;
power supplies;
programmable Logic Controllers (PLC);
power Drives;
devices for EX-zones or for mining applications in general;
products already covered by standards addressing similar topics such as:
- medical equipment covered by EN 60601‑1. For these devices, tests for verification after repair are covered by EN 62353;
- arc welding equipment covered by EN IEC 60974‑1. For these devices, tests for verification after repair are covered by EN 60974‑4.
- machinery covered by EN 60204‑1. For these devices, EN 60204‑1 applies.

2 Normative references

3 Terms and definitions

4 Requirements

5 Tests

5.1 General

5.2 Visual inspection

5.3 Measurement of protective bonding resistance

5.4 Measurement of the insulation resistance

5.5 Measurement of protective conductor current

5.6 Measurement of the touch-current

5.7 Confirmation of the compliance of the specifications for the protective measure SELV/PELV

5.8 Measurement of the leakage current produced by a floating input with a rated input voltage above 50 V AC or 120 V DC

5.9 Confirmation of the operation of further protective measures

5.10 Confirmation of the polarity of mains plug wiring

5.11 Functional test

6 Documentation and evaluation of test

7 Test equipment

Bibliography

BS EN 50678:2020

General procedure for verifying the effectiveness of the protective measures of electrical equipment after repair

Current, Under Review

Published:

30 Apr 2021