1、BRITISH STANDARD Signalling on low-voltage electrical installations in the frequency range 3 kHz to 148,5 kHz Part 7: Equipment impedance The European Standard EN 50065-7:2001 has the status ofa British Standard ICs 33.040.30 BS EN 50065-712001 Wk present to the responsible European committee any en
2、quiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. - A list of organizations represented on this committee can be obtained on request to its secretary. Cr oss-r e fer enc e
3、 s The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogu
4、e. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document compris
5、es a front cover, an inside front cover, the EN title page, pages 2 to 23 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. O BSI 10 April 2002 ISBN O 580 39474 3 EUROPEAN STANDARD EN 50065-7 NORME EUROPENNE EUROPISCHE NORM November 2001
6、 ICs 33.040.30 English version Signalling on low-voltage electrical installations in the frequency range 3 kHz to 148,5 kHz Part 7: Equipment impedance Transmission de signaux sur les rseaux lectriques basse tension dans la bande de frquences de 3 kHz 148,5 kHz Partie 7: Impdance des appareils Signa
7、lbertragung auf elektrischen Niederspannungsnetzen im Frequenzbereich 3 kHz bis 148,5 kHz Teil 7: Gerteimpedanzen This European Standard was approved by CENELEC on 2000-08-01. CENELEC members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this
8、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 in three official versions
9、(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 electrotechnical committees of Aust
10、ria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotec
11、hnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels O 2001 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 50065-7:2001 E EN 50065-7:2001 -2- Foreword This European St
12、andard was prepared by SC 205A, Mains communicating systems, of Technical Committee CENELEC TC 205, Home and Building Electronic Systems (HBES). The text of the draft was submitted to the Unique Acceptance Procedure and was approved by CENELEC as EN 50065-7 on 2000-08-01. The following dates were fi
13、xed : - latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2002-06-01 - latest date by which the national standards conflicting with the EN have to be withdrawn (daw) 2003-04-01 Annexes designated “normative“ a
14、re part of the body of the standard Annexes designated “informative“ are given for information only. In this standard, annexes A, B, C and D are informative. EN 50065 consists of the following parts, under the general title: Signalling on low voltage electrical installations in the frequency range 3
15、 kHz to 148,5 kHz Part 1 Part 2-1 General requirements, frequency bands and electromagnetic disturbances Immunity requirements for mains communications equipment and systems operating in the range of frequencies 95 kHz to 148,5 kHz and intended for use in residential, commercial and light industrial
16、 environments Immunity requirements for mains communications equipment and systems operating in the range of frequencies 95 kHz to 148,5 kHz and intended for use in industrial environments Part 2-2 Part 2-3 Immunity requirements for mains communications equipment and systems operating in the range o
17、f frequencies 3 kHz to 95 kHz and intended for use by electricity suppliers and distributors Low voltage decoupling filters - Generic specification Low voltage decoupling filters - Safety requirements Low voltage decoupling filters - Incoming filter Low voltage decoupling filters - Impedance filter
18、Low voltage decoupling filters - Segmentation filter Low voltage decoupling filters - Phase coupler Part 4-1 Part 4-2 Part 4-3 Part 4-4 Part 4-5 Part 4-6 Part 7 Equipment impedance -3- Contents EN 50065-7:2001 Introduction 4 1 Scope 5 2 Normative references 5 3 Definitions 5 4 Requirements . 6 5 Tes
19、t method 7 5.1 General 7 5.2 Test conditions 7 5.3 Impedance analyser measuring method . 8 5.4 Voltage ratio method . 9 Annex A (informative) Signalling on low voltage electrical installations in the frequency range 3 kHz to 148. 5 kHz. potential problems . 13 Annex B (informative) Minimum value of
20、the equipment impedance 15 B.l Consumers network impedance . 15 B.2 Type 1 - step 2: measurement of the input impedance (Zm(f) when the DUT is connected to the V-network output port; - step 3: calculation of ZDUT(f) using the Z-parameters and Zm(9. In annex C, a possible calculation method is shown
21、using the Z-parameters. -9- Artificial mains network (V-network) EN 50065-7:2001 - Device L L GND earth under test N N - - (DUT) 5.4 Voltage ratio method Signal The measuring method is based on the use of the artificial mains, CISPR 16-1 V-network defined in EN 50065-1 for measuring the output volta
22、ge of the mains communication devices. High-pass filter This method does not apply to devices working in common mode. The measuring equipment for measuring the signal output voltage, as defined in EN 50065-1, is replaced by a signal generator having an output impedance of 50 R, working at the measur
23、ing frequency and having an output voltage not exceeding 100 dB(pV)rms. Using the relevant switch on the V-network, the generator shall be connected to Line. A differential voltmeter tuned at the measuring frequency with a bandwidth I 200 Hz is connected by a high-pass filter blocking the 50 Hz sign
24、al and having a high input impedance 1) in parallel with the DUT, 2) between ground (GND) and neutral (N) of the CISPR 16-1 V-network. The input impedance value of this set (differential voltmeter plus high-pass filter) has to be greater than 20 x IZARTI, where ZART is the impedance of the artificia
25、l mains network as defined in EN 50065-1. The earth termination of the device under test, when this termination is present, shall not be connected to the ground termination (GND) of the artificial mains networks. The block diagram of the measuring Set-up is shown in Figure 2. Figure 2 - Block diagra
26、m for measuring Set-up EN 50065-7:2001 - 10 - The measurement is made as follows with the DUT connected to the artificial network: - step 1: a first reading is done by measuring the voltage over the DUT (VDUT); - step2: a second reading is done by measuring the voltage between ground and neutral (VN
27、); VN VDuT - step 3 : calculate the weighted voltage ratio D = -.l.Zel, where lZel is the minimum input impedance of the DUT in accordance with Table 1, 2 and 3; - step 4 : check that the voltage ratio D is below the curves in Figure 3 and Figure 4 according to the frequency. It is important to chec
28、k that the artificial mains network has a V-structure and its impedance meets the requirements given in EN 50065-1, .e.: 50Q II (50pH + 1.6Q) for 3 kHz to 9 kHz 50 Q II (5OpH + 5 Q) for 9 kHz to 150 kHz ART = NOTE The curves in Figures 3 and 4 are based on calculations which include 20% worst case t
29、olerance for IZARTI in accordance with EN 50065-1 Dmax IR ru ru c3 c3 P O ul O ul O 100Z:L-900 N3 - - 11- Dmax IR 2 2 ru ru c3 c3 P P O ul O ul O ul O ul O ul O 2 O ru O c3 O P O ul O m O O 03 O CD O 2 O O 2 2 O 2 ru O 2 c3 O 2 P O 2 ul O 2 m O -ZL - LOOZ:L-900 N3 - 13 - EN 50065-7:2001 Annex A (inf
30、ormative) Signalling on low voltage electrical installations in the frequency range 3 kHz to 148,5 kHz, potential problems The low voltage power lines are designed to carry and deliver electrical power at 230 V, 50 Hz. Recent developments have shown that it is very interesting and possible to transm
31、it data communication signals over the low voltage power line. The inherent difficulties of transmitting data over the low voltage network include 0 electrical equipment is designed to consume electrical power at 50 Hz and not transmit and receive data at mains signalling frequencies (3 kHz to 148,5
32、 kHz), 0 the low voltage mains power line does not have a characteristic impedance that other communication media are characterised by, 0 the attenuation and the impedance of the low voltage mains network vary considerably over the frequency range 3 kHz to 148,5 kHz, 0 the attenuation and the impeda
33、nce characteristics depend on the equipment connected to the low voltage mains network, 0 electrical equipment generates several types of electrical noise which can disturb Mains Communication Equipment and Systems (MCES), 0 the frequency range available to PLC is very wide (from 3 kHz to 148,5 kHz)
34、, which means it is difficult to have an equipment impedance covering the whole frequency range. This European Standard on equipment impedance is presented in the light of the current developments of low voltage mains signalling. It represents the best practical compromise on impedance values for th
35、e frequency range covered. Any future development will be taken into account in the next revision of this standard. The following points identify the most significant characteristics effecting the definition of impedance values: the range of impedance values established in the tables is the best com
36、promise to achieve interoperability of different PLC systems operating over the same low voltage mains network; resonance phenomena; discontinuities of impedance values at frequency boundaries; time dependency of impedance due to periodic effects of power supplies. EN 50065-7:2001 - 14 - Considerati
37、on of measurements in each working frequency range difficulty in measuring impedance values with mains voltage present (230 V), problems with measuring low impedance values across the whole frequency range, the relatively high impedance of coupling and CISPR 16-1 V-network dominating compared with t
38、he low impedance of the equipment under test, the operating conditions of the DUT are difficult to define due to the wide range of operating parameters. - 15 - EN 50065-7:2001 Annex B (informative) Minimum value of the equipment impedance B. 1 Consumers network impedance A limited program of network
39、 impedance measurements was carried out in three European countries (France, Germany, Italy). These results are considered representative of similar ne two rks. In particular, the statistic distribution of the impedance values measured on consumers networks in the frequency range 3 kHz to 148,5 kHz,
40、 shows that the impedance has the following characteristics: it is very rarely greater than 20 R; 90% of the values lie in the range 0,5 R to 10 R; the most frequent values are around 5 R; the impedance depends on the measuring point. The reasons for this behaviour are as follows : the consumers pow
41、er network has, in general, a complex “tree“ structure having lines or cables with three conductors (phase, neutral and earth), with the power supply point situated on the “root“ and the loads distributed on the “branch ends“; the layout of the network and the loads differs between consumers; some c
42、onsumers loads (that is, households and professional equipment) have a very low impedance (in the range 0,l R to 10 R) mainly due principally to the radio-interference suppression filters installed in them (upstream of the apparatus switch); the impedance of the lines or cables is not negligible in
43、relation to that of the loads, B.2 Type 1 & 2 equipment impedance versus environment As a consequence of the above considerations and taking into account that each Type 1 equipment may be installed either in a distributed way, at each consumers premise, or in a concentrated way on a centralised boar
44、d, each Type 2 equipment may be associated with an household or professional equipment, generally distributed on the consumers network, it is possible to prescribe a minimum value of the impedance modulus of each Type 2 equipment, without limiting the number of equipment installations and it is mand
45、atory to choose a suitable constant minimum value of the equipment impedance modulus ( I Z, I ) for both Type 1 and Type 2. EN 50065-7:2001 - 16 - These choices, either for TX or RX mode in the signalling band and adjacent bands, allow avoidance of, as much as possible, unsuitable mutual interferenc
46、e between equipment of different types in order to allow simultaneous operation of systems in adjacent frequency bands, the coexistence of equipment of the same type either for a stand alone system and for installations where more than one system operates (multiple systems). B.3 Minimum value of the
47、 equipment impedance The following information is a supplement to the tables described in clause 3. B.3.1 Table 1 Frequency range 3 kHz to 95 kHz - RX mode: the proposed value allows the coexistence, - TX mode: the impedance in transmitting mode should be adapted to the impedance of the network. Fre
48、quency range 95 kHz to 148,5 kHz - RX and TX modes: the proposed value is justified in order to avoid mutual interference. B.3.2 Table2 Frequency range 3 kHz to 9 kHz - RX mode: the proposed value allows the coexistence, - TX mode: the impedance in transmitting mode should be adapted to the impedanc
49、e of the network. Frequency range 9 kHz to 95 kHz - RX mode: the proposed values allow the coexistence, particularly in the centralised installations of stand alone system equipment. For multiple system installations, the coexistence is guaranteed with 10 R in “Out BW”, - TX mode: the impedance in transmitting mode should be adapted to the impedance of the network. Frequency range 95 kHz to 148,5 kHz - RX and TX modes: the proposed values are justified in order to avoid mutual interference. - 17 - EN 50065-7:2001 B.3.3 Table3 Frequency range 3 kHz to 95 kHz -
