1、m 3404583 OLL3520 507 m BRITISH STANDARD Live working - Earthing or earthing and short-circuiting equipment using lances as a short-circuiting device - Lance earthing The European Standard EN 61219 : 1993 has the status of a British Standard Travaux sous tension - Appareil de mise la terre nu de mic
2、e A la terre et en court-circuit utilisant des cannes comme dispositif de mise en court-circuit - Mise la terre aii moyen de cannes Arbeiten unter Spannung Erdungs- oder Erdungs- und KurzschlieRvorrichtung mit Stben als kurzschliefSendes Gert St,aberdung BS EN 61219 : 1994 3404583 OLL352L 443 BS EN
3、61219 : 1994 Cooperating organizations The European Committee for Electrotechnical Standardization (CENELEC), under whose supervision this European Standard was prepared, comprises the national committees of the following countries: Austria Italy Belgium Luxembourg Denmark Netherlands Finland Norway
4、 France Portugal Germany Spain Greece Sweden Iceland Switzerland Ireland United Kingdom 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
5、 July 1994 O BSI 1994 The following BSI references relate to the work on this standard: Committee reference PEL188 Draft for comment 92/20132 DC ISBN O 580 23147 X Amendments issued since publication I Text affected Amd. No. I Date 3404583 OLL3522 38T SS EN 61219 : 1994 Contents Cooperating organiza
6、tions National foreword Page Inside front cover i 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 Inside back cover National annex NC (informative) Cross-refere
7、nces Inside back cover 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 eurthing und short-circuiting equipment using lances us u sho
8、rt-circuiting teleconzrnunicutions und electronics diugmms Part 1 : 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 earthi
9、ng and short-circuiting by pushing and guiding each lance 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
10、 to an earthing cable and pushed simultaneously and guided 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 mul
11、tiple lance using earthing lance contacts has no advantages over a set of single lances. m 3404583 OLL3530 45b m 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 earthin
12、g lance contact into the line lance contact 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
13、 figures 1 to 4 and 7). 3.2.6 Lance contact 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 lanc
14、e contact Lance contact connected to the 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.
15、 3.2.8 Insulating element Hand-held insulating 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 detacha
16、ble, to a lance (see figure 6). 3.2.8.2 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
17、 - The interconnection may be made partly through the earthing system (see figures 3 and 7). 3404583 0333531 392 W Page 9 EN 61219 : 1993 3.2.1 O Rated current I, and rated time fr Values assigned to a lance earthing or part of it, to define the highest r.m.s. value of current and the highest Joule-
18、integral (1: t,) that it 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 sw
19、itching device. can satisfactorily 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 Ea
20、ch component of a lance earthing that is exposed to short-circuit current is characterized by rated current Ir and rated time f,. Six values of rated time are standardized: 3; 2; 1 ; 0.5; 0,25 and 0,l s Ir shall be specified for one of these standard times or as a rated conditional short-circuit cur
21、rent for a specified combination with an effective current-limiting protection. No part 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-
22、integral 1; rr is not exceeded. 5 Requirements 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
23、will be exposed to in 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
24、 well as serious, permanent damage to installations or buildings. _ 3404583 OLL3532 229 Category Page 10 EN 61219 : 1993 Temperature range Reliable current-limiting fuses and circuit breakers are available for low voltage. If a low- voltage lance earthing designed for continued use is effectively pr
25、otected by a current-limiting switching device, the requirements can be based on the rated conditional short-circuit current. Cold (C) Equipment for continued used after short-circuit exposure shall, as an additional requirement, be in perfect condition after exposure to the severest short-circuit s
26、tresses for which it is designed. - 40 C to + 55 “C 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 prescribed in the custom
27、ers 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 categories for high (
28、W) and low (C) temperature use are included (see table 1). Table 1 - Special temperature categories I Warm(W) I -5“Cto+7O0C I 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-
29、section. 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
30、1230. NOTE - There are two common practices regarding the colour of the covering: a) a bright colour, such as orange or red, to increase the visibility of the device. Preferences differ among users; b) transparency to permit inspection of the conductor for signs of corrosion or surface strand damage
31、, although such transparency is usually lost after repeated use. m 3404583 OLL3533 Lb5 m 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 insertion into
32、 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 short-circuiti
33、ng 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 surfaces or co
34、ntact pressures. Lances designed for continued use after short-circuit exposure shall have their current limited to the following values: - copper lance: 180 A/mm2; - aluminium lance: i20 A/mm2; - steel lance: 65 A/mm2. Compliance shall be verified by tests according to 6.3 and 6.4 and by visual ins
35、pection. 5.3.1 The 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 earthings using
36、 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 fulfilled even a
37、fter 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 required. T
38、he 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 this is to give
39、 a time margin for disconnection before short-circuiting. 3404583 OLL3534 OT1 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 visual inspection. 5.3.2 Blocking and
40、locking of lances in fully inserted position 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 arra
41、ngements for making or completing the blocking with a padlock with a 5 mm solid shackle. 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 elements The insulating elements u
42、sed 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 handles are permitted for voltages s 3
43、6 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 least 20 mm. With regard to pushi
44、ng 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 and overhead lines, an earthing
45、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 and C (see also IEC 855 and 1235)
46、. 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. Detachable insulating handles and earthing poles shall be secur
47、ed against unintentional loosening. All insulating handles and earthing poles including couplings shall withstand reasonable excess forces without failing or being damaged. Compliance shall be verified by testing according to relevant parts of earthing pole standards, by tests in accordance with 6.3
48、 and 6.5, by measuring and checking manually and by visual inspection. 5.4 Insulation w-ordination with assemblies Insulating parts of a lance earthing integrated in a switchgear or controlgear assembly shall respond to relevant parts of assembly standards. Compliance shall be verified by testing ac
49、cording to relevant parts of assembly standards. 5.5 Co-ordination with assembly enclosure Installation of lance earthing in an enclosed switchgear or controlgear assembly shall not reduce its degree of enclosure when the lance is inserted or removed. . Compliance shall be verified by testing according to relevant parts of assembly standards and visual inspection. 5.6 Marking 5.6.1 General - Marking shall be clearly legible. - Marking letters shall be at least 3 mm high. - Marking shall be durable. Compliance shall be verified by test in accordance with 6.6 and by visual inspection.
