1、- BSI BS*EN*bL2LS 94 Lb24bb9 0423244 279 BRITISH STANDARD Live working - Earthing or earthing and short-circuiting equipment using lances as a short-circuiting device - Lance earthing The Europcan Standard EN 61219 : 1993 has the status of a British Standard Travaux sous tension - Appareil de mise i
2、. la terre LI de mise 2 la terre et en court-circuit utilisant des cannes coinine disposit,if de mise en court-circuit - Mise 2 la terre au moyen de cannes Arbeiten unter Spannung Erdungs- oder Erdungs- und KurzschlieBvorrichting mit Stben als kurzschliefiendes Gert St,aberdiing BS EN 61219 : 1994 B
3、SI BS*EN*bLZLS 94 = LbZ4bb9 0423245 LO5 BS EN 61219 : 1994 This British Standard, having been prepared under the direction of the Power Electrical Engineering Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 July 1994 0 ES1 1994 The fol
4、lowing BSI references relate to the work on this standard: Committee reference PEL88 Draft for comment 9220132 DC ISBN O 580 23147 X Cooperating organizations The European Committee for Electrotechnical Standardization (CENELEC), under whose supervision this European Standard was prepared, comprises
5、 the national committees of the following countries: Austria Italy Belgium Luxembourg Denmark Netherlands Finland Norway France Portugal Germany Spain Greece Sweden Iceland Switzerland Ireland United Kingdom Amendments issued since publication Amd. No. Date Rxt affected BSI BS*EN*bL219 94 2624669 04
6、23246 041 BS EN 61219 : 1994 Contents Cooperating organizations Page Inside front cover National foreword 1 EN foreword 2 Text of EN 61219 : 1994 3 National annex NA (informative) Original IEC text amended by CENELEC common modifications 38 National annex NB (informative) Committees responsible Insi
7、de back cover National annex NC (informative) Cross-references Inside back ewer National foreword This British Standard has been prepared under the direction of the Power Electrical Engineering Standards Policy Committee and is the English language version of EN 61219 Live working - Eurthing or eart
8、hing und short-circuiting equipment using hnces us u short-circuiting device - Lance earthing, published by the European Committee for Electrotechnical Standardization (CENELEC). It was derived by CENELEC from IEC 1219 : 1993, published by the International Electrotechnical Commission (IEC) and prep
9、ared by IEC Technical Committee No. 78 Tools for live working. The CENELEC common modifications have been implemented at the appropriate places in the text and are indicated by a side line in the margin. Parts of the original IEC text that have been modified by CENELEC have been quoted in the nation
10、al annex NA. The graphic signs, symbols and letters used in this standard may be found in the following British Standard: BS 3939 Gruphicul symbols for electricul powei; telecmrnunicutom uncl electronics diugrums Part 1 Part 2 ; 1985 Symbol elements, quulifging symbols und othm symbols having generu
11、l upplicution 1986 or - pushed sequentially and guided through an earthing lance contact into the line lance contacts of the conductors to be earthed and short-circuited (see figure 1 b). b) With a set of single lances used as a device for earthing and short-circuiting by pushing and guiding each la
12、nce sequentially through an earthing lance contact into the line lance contact of one of the conductors to be earthed and short-circuited (see figure 3). c) With a multiple lance used as a device for earthing and short-circuiting. It is connected to an earthing cable and pushed simultaneously and gu
13、ided into the lance contacts of the conductors to be earthed and short-circuited (see figure 2). NOTES 1 (see notes in clause 1 and 3.2.7). 2 A set of single lances can form a multi-phase lance device only when using earthing lance contacts A multiple lance using earthing lance contacts has no advan
14、tages over a set of single lances. BSI BS*EN*612LS 94 Lb24669 0423254 118 Page 8 EN 61219 : 1993 3.2.4 Single-phase lance device Single lance used for earthing and short-circuiting a single-phase system by being pushed sequentially and guided through an earthing lance contact into the line lance con
15、tact of the conductor to be earthed and short-circuited (see figure 4). 3.2.5 Earth connection Connection between a lance and the earthing system. Comprises earth clamps, earthing lance contact or earthing cable and sometimes parts of supporting structures (see figures 1 to 4 and 7). 3.2.6 Lance con
16、tact Fixed installation contact, specially arranged for the guiding, connection and securing of a lance. 3.2.6.1 Line lance contact Lance contact connected to the conductor to be earthed or earthed and short-circuited (see figures 1 to 4). 3.2.6.2 Earthing lance contact Lance contact connected to th
17、e earthing system (see figures 1 b, 3 and 4). 3.2.7 Earthing cable Cable used for earth connection (see figures la and 2). NOTE - A cable forming part of a short-circuiting device is defined as a short-circuiting cable and cannot be referenced to this standard. 3.2.8 Insulating element Hand-held ins
18、ulating component for bringing and connecting a lance to parts of electrical installations for earthing or earthing and short-circuiting purposes. 3.2.8.1 Insulating handle Insulating element comprising a short grip, a handguard and a coupling, fixed or detachable, to a lance (see figure 6). 3.2.8.2
19、 Earthing pole Insulating element comprising an insulating rod, foam-filled tube or hollow tube with fixed or detachable coupling to a lance (see figure 3b). 3.2.9 Short-circuiting device Device for interconnecting conductors for short-circuiting purposes. NOTE - The interconnection may be made part
20、ly through the earthing system (see figures 3 and 7). BSI BS*EN*bLZLS 94 1624669 0423255 054 Page 9 EN 61219 : 1993 3.2.10 Rated current I, and rated time r, Values assigned to a lance earthing or part of it, to define the highest r.m.s. value of current and the highest Joule-integral (/: t,) that i
21、t can resist without unacceptable effects. The values apply only to those parts designed to withstand short-circuit current. 3.2.1 1 Rated conditional short-circuit current Value of the prospective short-circuit current that a lance earthing, protected by a current-limiting switching device, can sat
22、isfactorily withstand for the operating time of this device under specified test conditions (see 4.6 of IEC 439-1). 3.2.12 Peak current lm Peak value of the highest current during the transient period following initial energizing of the circuit. 4 Electrical characteristics Each component of a lance
23、 earthing that is exposed to short-circuit current is characterized by rated current I, and rated time t,. Six values of rated time are standardized: 3; 2; 1 ; 0,5; 0,25 and 0,l s i, shall be specified for one of these standard times or as a rated conditional short-circuit current for a specified co
24、mbination with an, effective current-limiting protection. No pari of a lance earthing shall be exposed to a current or Joule-integral higher than that defined by its rated values. NOTE - The equipment may be used for a longer short-circuit time than its rated time if the Joule-integral /: f, is not
25、exceeded. 5 Requlrements 5.1 General Equipment shall permit safe and simple earthing and short-circuiting of electrical installations (see annex C). Devices, when installed according to instructions for use, shall be able to withstand all stresses from fault currents that they will be exposed to in
26、practice without causing electrical, mechanical, chemical or thermal danger to persons. For indoor use, accepted temperatures and materials shall be Co-ordinated so as to avoid any interference with the evacuation of personnel to avoid harmful concentrations of toxic vapours as well as serious, perm
27、anent damage to installations or buildings. BSI BS*EN*bLZL 94 Lb24bb 0423256 T90 Category Warm (W) Cold (C) Page 10 EN 61219 : 1993 Temperature range - 5 “C to + 70 “C - 40 “C to + 55 “C Reliable current-limiting fuses and circuit breakers are available for low voltage. If a low- voltage lance earth
28、ing designed for continued use is effectively protected by a current-limiting switching device, the requirements can be based on the rated conditional short-circuit current. Equipment for continued used after short-circuit exposure shall, as an additional requirement, be in perfect condition after e
29、xposure to the severest short-circuit stresses for which it is designed. The following clauses specify the requirements and tests necessary to verify that a device meets these requirements (see table 2). Agreement may be made between manufacturer and customer on additional requirements and tests pre
30、scribed in the customers specification. With respect to climatic conditions, equipment for stationary use in normal indoor atmosphere shall refer to a temperature range + 5 OC to + 55 OC. For mobile and outdoor equipment, normal use shall refer to a temperature range - 25 OC to + 55 OC. Two special
31、categories for high (W) and low (C) temperature use are included (see table 1). Table 1 - Special temperature categories 5.2 Earthing cables Earthing cables shall be sized for expected fault currents. For mechanical reasons the conductor shall have as a minimum a 16 mm2 copper equivalent cross-secti
32、on. The cable shall have an insulating cover for mechanical and chemical protection and shall be connected in such a way as to ensure reliable contacts and excellent fatigue resistance. This is achieved by selecting earthing cables according to IEC 1138 and end fittings according to 4.4 of IEC 1230.
33、 NOTE - There are two common practices regarding the colour of the covering: a) users; b) although such transparency is usually lost after repeated use. a bright colour, such as orange or red, to increase the visibility of the device. Preferences differ among transparency to permit inspection of the
34、 conductor for signs of corrosion or surface strand damage, BSI BS*EN*b1217 74 M 1b24bb 0423257 927 Page 11 EN 61219 : 1993 Compliance shall be verified by testing in accordance with relevant parts of IEC 1230 and- by visual inspection. 5.3 Lances, lance contacts and guiding components After full in
35、sertion into lance contacts, the lance earthing shall protect against dangerous voltage and electric arc due to accidental energization. Lances, lance contacts and guiding components shall be Co-ordinated to give reliable securing and contact even under short-circuit conditions. Lances (including sh
36、ort-circuiting frames of multiple lances), lance contacts and guiding components shall withstand the short-circuit stresses for which they are designed as well as the push, pull, bending and torsional stresses arising in normal use without any harmful influence on contacts by reduction of contact su
37、rfaces or contact pressures. Lances designed for continued use after short-circuit exposure shall have their current limited to the following values: - copper lance: 180 Almm2; - aluminium lance: 120 A/mm2; - steel lance: 65 Almm2. Compliance shall be verified by tests according to 6.3 and 6.4 and b
38、y visual inspection. 5.3.1 lhe lance shall be designed to facilitate reliable operation with reasonable physical effort by the user. Installing and removing of lances Lances shall be Co-ordinated with lance contacts and other guiding components to attain accurate and smooth application. In lance ear
39、things using earthing lance contacts, the lance shall always enter the earthing lance contact before line lance contacts. The forces needed to insert and remove a lance shall not exceed 400 N. If the equipment is designed for continued use after short-circuit exposure, this requirement shall be fulf
40、illed even after such exposure. It may be impossible or unsuitable to size lances for continued use even in installations where reduction of outage time is very determinant. If so, a special agreement between customer and manufacturer on the removability of lances after short-circuit exposure may be
41、 required. The lance shall meet a mechanical stop in the fully inserted position. Another stop may be arranged for a single lance in systems not solidly earthed with disconnecting earth fault protection in a position where it has reached full contact with the first line lance contact. The aim of thi
42、s is to give a time margin for disconnection before short-circuiting. BSI BS*EN*bL2LS 94 W 1624669 0423258 863 Page 12 EN 61219 : 1993 Stops shall withstand reasonable excess forces. Compliance shall be verified by tests in accordance with 6.2 and 6.3, by measuring and checking manually and by visua
43、l inspection. 5.3.2 Lance earthings shall be equipped with arrangements for blocking of the lance in fully inserted position. The blocking shall be of a type that is not affected by vibrations. Lance earthings for enclosed switchgear or controlgear assemblies shall have arrangements for making or co
44、mpleting the blocking with a padlock with a 5 mm solid shackle. Blocking and locking of lances in fully inserted position Blockings shall withstand reasonable excess forces. Compliance shall be verified by test in accordance with 6.3, by checking manually and by visual inspection. 5.3.3 Insulating e
45、lements The insulating elements used with lances are insulating handles and earthing poles, f xed to the lance conductor or detachable. Insulating elements shall offer protection against puncture, flash-over and creepage current at the voltages to which they are exposed in practice. Insulating handl
46、es are permitted for voltages s 36 kV. Earthing poles shall be used for voltages 36 kV and wherever necessary for raising and reaching. Insulating handles shall have a grip and a handguard that prevents the hand from sliding out on the bare conductor (see figure 6). The handguard height shall be at
47、least 20 mm. With regard to pushing and pulling forces, the handle shall, if necessary, be suitable for two-handed operation. The minimum grip length shall be 115 mm for one-hand lances and 220 mm for two-hand lances. Where a problem is present for raising and reaching, for instance open switchgears
48、 and overhead lines, an earthing pole is normally preferable. If the operator is not sufficiently distanced from live parts by the length of the lance, the earthing pole length shall be given the necessary additional length. Rules for the selection of earthing poles are given in IEC 1230, annexes A
49、and C (see also IEC 855 and 1235). Interim rules for the selection of earthing poles are given in annexes A and C of IEC 1230. There shall be no conductor along the earthing pole, either outside or inside. This document is under consideration by Technical committee 28 BSI BS*EN*bL219 94 Lb24669 0423259 7TT M Page 13 EN 61219 : 1993 Detachable insulating handles and earthing poles shall be secured against unintentional loosening. All insulating handles and earthing poles including couplings shall withstand reasonable excess forces without failing or being damaged. Complianc
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