1、BRITISH STANDARDBS EN 60255-22-4:2008Measuring relays and protection equipment Part 22-4: Electrical disturbance tests Electrical fast transient/burst immunity testICS 29.120.70g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54
2、g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 60255-22-4:2008This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 July 2008 BSI 2008ISBN 978 0 580 58841 9National forewordThis British Standard is the UK impl
3、ementation of EN 60255-22-4:2008. It is identical to IEC 60255-22-4:2008. It supersedes BS EN 60255-22-4:2002 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee PEL/95, Measuring relays and protection systems.A list of organizations represented on this co
4、mmittee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments/corrigenda issued
5、 since publicationDate CommentsEUROPEAN STANDARD EN 60255-22-4 NORME EUROPENNE EUROPISCHE NORM June 2008 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassa
6、rt 35, B - 1050 Brussels 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60255-22-4:2008 E ICS 29.120.70 Supersedes EN 60255-22-4:2002English version Measuring relays and protection equipment - Part 22-4: Electrical disturban
7、ce tests - Electrical fast transient/burst immunity test (IEC 60255-22-4:2008) Relais de mesure et dispositifs de protection - Partie 22-4: Essais dinfluence lectrique -Essai dimmunit aux transitoires lectriques rapides en salves (CEI 60255-22-4:2008) Messrelais und Schutzeinrichtungen - Teil 22-4:
8、Prfungen der elektrischen Strfestigkeit - Prfung der Strfestigkeit gegen schnelle transiente elektrische Strgren/Burst (IEC 60255-22-4:2008) This European Standard was approved by CENELEC on 2008-05-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the
9、 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 Central Secretariat or to any CENELEC member. This European Standard exists
10、 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 Central Secretariat has the same status as the official versions. CENELEC members are the national electro
11、technical committees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerla
12、nd and the United Kingdom. Foreword The text of document 95/228/FDIS, future edition 3 of IEC 60255-22-4, prepared by IEC TC 95, Measuring relays and protection equipment, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60255-22-4 on 2008-05-01. This European Standar
13、d supersedes EN 60255-22-4:2002. The main change with respect to EN 60255-22-4:2002 is: the improvement of the test severity level regarding the repetition rate. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical nationa
14、l standard or by endorsement (dop) 2009-02-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2011-05-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60255-22-4:2008 was approved by CENELEC as a Eur
15、opean Standard without any modification. _ BS EN 60255-22-4:2008 2 CONTENTS 1 Scope and object4 2 Normative references .4 3 Terms and definitions .4 4 Test severity level 6 5 Test equipment.6 6 Test set-up .7 6.1 Test set-up using CDNs 7 6.2 Test set-up using the capacitive coupling clamp 7 7 Test p
16、rocedure .8 8 Criteria for acceptance .8 9 Test report8 Annex A (informative) Background information for fast transient/burst immunity test11 Annex B (informative) Examples of environments for Class A and Class B test levels 12 Figure 1 Ports tested in this standard for measuring relays and protecti
17、on equipment.6 Figure 2 Example of a test set-up using coupling/decoupling networks 9 Figure 3 Example of a test set-up using a capacitive coupling clamp .10 Table 1 Test voltages for the EUT ports.6 Table 2 Criteria for acceptance 8 BS EN 60255-22-4:2008 3 Annex ZA (normative) Normative references
18、to international publications with theircorresponding European publications13MEASURING RELAYS AND PROTECTION EQUIPMENT Part 22-4: Electrical disturbance tests Electrical fast transient/burst immunity test 1 Scope and object This part of IEC 60255-22 is based on IEC 61000-4-4, referring to that publi
19、cation where applicable, and specifies the general requirements for electrical fast transient immunity tests for measuring relays and protection equipment for power system protection, including the control, monitoring and process interface equipment used with these systems. The objective of the test
20、s is to confirm that the equipment under test will operate correctly when energized and subjected to repetitive fast transients (bursts) such as those originating from interrupting of inductive loads, relay contact bounce, etc. The requirements specified in this standard are applicable to measuring
21、relays and protection equipment in a new condition and all tests specified are type tests only. The object of this standard is to state: definitions of terms used; test severity level; test equipment; test set-up; test procedures; criteria for acceptance; test report requirements. 2 Normative refere
22、nces The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60050-161, International Electrotechnica
23、l Vocabulary Chapter 161: Electromagnetic compatibility IEC 60255-6:1988, Electrical relays Part 6: Measuring relays and protection equipment IEC 61000-4-4:2004, Electromagnetic compatibility (EMC) Part 4-4: Testing and measurement techniques Electrical fast transient/burst immunity test 3 Terms and
24、 definitions For the purposes of this document the following terms and definitions apply. 3.1 EUT equipment under test, which may be either a measuring relay or a protection equipment BS EN 60255-22-4:2008 4 3.2 auxiliary equipment equipment necessary to provide the EUT with the signals required for
25、 normal operation and equipment to verify the performance of the EUT 3.3 burst sequence of a limited number of distinct pulses or an oscillation of limited duration IEV 161-02-07 3.4 CDN coupling and decoupling devices which have been integrated into one box 3.5 communication port interface with a c
26、ommunication and/or control system, using low energy signals, permanently connected to the EUT 3.6 functional earth port a port on the EUT which is connected to earth for purposes other than electrical safety 3.7 input port port through which the EUT is energized or controlled in order to perform it
27、s function(s), for example current transformer, voltage transformer, binary (status), analogue inputs, etc. 3.8 output port port through which the EUT produces predetermined changes, for example contacts, optocoupler, analogue outputs, etc. 3.9 port particular interface of the EUT with the external
28、electromagnetic environment IEC 61000-4-4, 4.2 3.10 auxiliary power supply port AC or DC auxiliary energizing input of the EUT 3.11 transient pertaining to or designating a phenomenon or a quantity which varies between two consecutive steady states during a time interval short compared with the time
29、-scale of interest IEV 161-02-01 BS EN 60255-22-4:2008 5 Auxiliary power supply port Functional earth port Output port Input port Communication port EUT Figure 1 Ports tested in this standard for measuring relays and protection equipment 4 Test severity level The test voltages for the appropriate po
30、rts of the EUT in Class B and Class A applications are shown in Table 1. The repetition rates of the test waveforms should be as defined in IEC 61000-4-4 as shown in Table 1. Unless otherwise stated, no test is advised for ports interfacing with cables whose total length according to the manufacture
31、rs functional specification is always less than 10 m. For the functional earth port, the fast transient/burst test is not applicable to this port if interfacing with cables whose total length according to the manufacturers functional specification is always less than 3 m. It is not recommended to ap
32、ply this test when the functional earth and protective earth are a single connection. When these earths are separate connections, the protective earth should not be disconnected when applying the tests to the functional earth. The fast transient/burst test is not applicable to the communications por
33、t if interfacing with cables which are, in normal use, permanently connected, and whose total length according to the manufacturers functional specification is always less than 3 m. Table 1 Test voltages for the EUT ports Open-circuit output test voltage and repetition rates Class B Class A Port und
34、er test Peak voltage kV 10 % Repetition rate kHz 10 % Peak voltage kV 10 % Repetition rate kHz 10 % Functional earth 2 5 or 100 4 5 or 100 Auxiliary power supply inputs 2 5 or 100 4 5 or 100 Input/output ports 2 5 or 100 4 5 or 100 Communication 1 5 or 100 2 5 or 100 NOTE 1 Information regarding the
35、 choice between class A and class B test levels are given in Annex B. NOTE 2 Use of 5 kHz rates is traditional; however, 100 kHz is closer to reality. Repetition rate shall be stated by the manufacturer. 5 Test equipment The test equipment is described in IEC 61000-4-4, Clause 6. This includes a des
36、cription of the test generator, CDN and capacitive coupling clamp. IEC 914/02 BS EN 60255-22-4:2008 6 6 Test set-up The general test set-ups are specified in IEC 61000-4-4, Clause 7. All auxiliary equipment used to provide the EUT with signals for normal operation, and to verify the correct operatio
37、n of the EUT, must be decoupled, so that the test voltage does not affect the auxiliary equipment. The common mode rejection of the decoupling device shall be as high as possible in order to minimize the degradation of the common mode rejection ratio of the EUT port. Normally, the EUT shall be indiv
38、idually tested with the EUT placed on an insulating support 0,1 m above the ground reference plane, and all parts of the EUT shall be at least 0,5 m from any metallic structure. If the EUT is to be tested on a non-conducting table, normally 0,8 m high, the ground reference plane may be placed under
39、the table. Where the EUT is exclusively mounted in a cubicle, the tests may be conducted with the EUT in the cubicle. No test shall be performed on interconnecting cables between EUT which are completely within the cubicle, these being regarded as internal cables of the system. The cubicle should be
40、 placed on an insulating support, 0,1 m above the ground reference plane. Interconnecting cables greater than 1 m in length belonging to the EUT shall remain on the insulating support. Apart from the port being tested, the connections to all other ports shall be arranged to provide a high impedance
41、path to earth for the fast transient. This may be provided by open circuits (where the circuit is not subject to supply or monitoring) or leads longer than 2 m. Where necessary for the supply or monitoring equipment, decoupling circuits or devices may be added in the leads, connected as shown in Fig
42、ure 2. 6.1 Test set-up using CDNs The application of the fast transient test voltage to the EUT using a CDN, as defined in IEC 61000-4-4, 6.2, is the only test method for the auxiliary power supply port, and the preferred method for the AC current and voltage ports. The test voltage shall be applied
43、 in common mode to all ports of the EUT in turn. An example of the test set-up using the CDN is shown in Figure 2. The length of leads between the fast transient generator and the CDN should be as short as possible; the use of a single assembly for the generator and the CDN is preferred. The leads t
44、o the EUT should be no longer than 1 m. Auxiliary equipment required for the defined operation of the EUT according to the specifications, for example communication equipment, as well as auxiliary equipment necessary for ensuring any data transfer and assessment of the functions, shall be connected
45、to the EUT through CDNs. However, as far as possible the number of cables to be tested should be limited by restricting attention to the representative functions. 6.2 Test set-up using the capacitive coupling clamp For the application of the fast transient test voltage to circuits where a direct con
46、nection to the terminals of the EUT is not possible, or where the insertion of a CDN itself would upset the operation of the EUT, a capacitive coupling clamp, as defined in IEC 61000-4-4, 6.3, shall be used. This test method is the preferred one for the functional earth, status input, output contact
47、 and communication ports, and it is recommended that each port is tested in turn, with all cables to each port tested simultaneously where practical. NOTE An example of such an application is where the fast transient test voltage would be applied to a connection between separate units belonging to t
48、he same protection equipment or system BS EN 60255-22-4:2008 7 An example of the test set-up using the capacitive coupling clamp is shown in Figure 3. The port being tested shall be connected using the type of cable and method of termination and connections recommended by the manufacturer. The cable
49、 between the capacitive coupling clamp and the equipment under test shall be no longer than 1 m. The cable between the auxiliary equipment and the clamp shall extend at least 10 m (or the maximum length permitted by the manufacturer if less than 10 m) from the clamp. Excess cable should be loosely coiled, maintaining a distance of at least 0,1 m from any ground plane or metallic structure. 7 Test procedure The tests shall be carried out at the reference conditions given in IEC
