BS-7699-8-1994 IEC-60519-8-1983.pdf
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1、BRITISH STANDARD BS 7699-8: 1994 IEC 519-8: 1983 Specification for Safety in electroheat installations Part 8: Particular requirements for electro-slag remelting furnaces Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 11:43:31 GMT+00:00 2006, Uncontrolled Copy,
2、 (c) BSI BS 7699-8:1994 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 May 1994 BSI 10-1999 The following BSI references relate to the
3、 work on this standard: Committee reference PEL/87 Draft for comment 81/20174 DC ISBN 0 580 22881 9 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Power Electrical Engineering Standards Policy Committee (PEL/-) to Technical Committee PE
4、L/87, upon which the following bodies were represented: Association of Manufacturers Allied to the Electrical and Electronic Industry (BEAMA Ltd.) British Glass Manufacturers Confederation British Industrial Furnace Constructors Association British National Committee for Electroheat British Steel pl
5、c Electric Trace Heating Industry Council (ETHIC) Electricity Association Energy Industries Council Engineering Equipment and Materials Users Association Engineering Industries Association Health and Safety Executive Induction and Dielectric Heating Manufacturers Association Institution of Electrica
6、l Engineers Lighting Industry Federation Ltd. Amendments issued since publication Amd. No.DateComments Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 11:43:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7699-8:1994 BSI 10-1999i Contents Page Committees respon
7、sibleInside front cover National forewordii 1Scope1 2Terminology1 3Electrical part1 4Mechanical part1 5Cooling circuit2 6Fume emission control2 7General safety2 List of referencesInside back cover Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 11:43:31 GMT+00:0
8、0 2006, Uncontrolled Copy, (c) BSI BS 7699-8:1994 ii BSI 10-1999 National foreword This British Standard has been prepared under the direction of the Power Electrical Engineering Standards Policy Committee. It is identical with IEC 519-8:1983 Safety in electroheat installations Part 8: Particular re
9、quirements for electro-slag remelting furnaces, published by the International Electrotechnical Commission (IEC). It is being published at the request of the British Technical Committee on Electroheat (PEL/87), taking into account that IEC 519-1 General requirements has been ratified by the European
10、 Committee for Electrotechnical Standardization (CENELEC), and published as a European Standard (EN), and has been published as BS EN 60519-1 Safety in electroheat installations Part 1: General requirements. Technical Committee PEL/87 considers this standard to be a guide to good safety practices. I
11、t is currently being reviewed by IEC to bring it into line with the latest technology. 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 i
12、tself confer immunity from legal obligations. Cross-references International StandardCorresponding British Standard BS 4727 Glossary of electrotechnical, power, telecommunication, electronics, lighting and colour terms IEC 50-841Part 2: Group 10:1985 Industrial electroheating terminology IEC 519-1:1
13、984BS EN 60519 Safety in electroheat installations Part 1:1993 General requirements Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 and 2, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have ha
14、d amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 11:43:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7699-8:1994 BSI 10-19991 1 Scope This standard applies to e
15、lectroheating installations for the remelting and in some cases for refining processes of metals through direct resistance heating of a conductive slag. The requirements should be read in conjuction with, and in addition to IEC Publication 519-1: Safety in Electroheat Installations, Part 1: General
16、Requirements. 2 Terminology Terms used in this standard are defined in IEC Publication 519-1, in IEC Publication 50(841), International Electrotechnical Vocabulary (IEV), Chapter 841: Industrial Electroheating, and in IEC Publication 779: Test Methods for Electro-slag Remelting Furnaces. 3 Electrica
17、l part 3.1 High voltage 3.1.1 General characteristics The following requirements shall be met to ensure adequate safety in operation: 1) The supply system shall be designed to withstand sudden current fluctuations occurring at the start of the melting process with dry slag. 2) The circuit-breaker sh
18、all be designed for frequent operation. 3) The secondary circuit shall be earthed directly or through an approved earthing device. 3.1.2 High-voltage circuit-breaker closing conditions 1) Isolator in closed position. 2) Check the setting of the secondary voltage. 3) Correct furnace operating conditi
19、ons established. NOTEIt is desirable that provision be made for an illuminated or other signal indicating that the start-up conditions are satisfied and that the circuit-breaker can be closed. 3.2 Power circuit 1) This circuit shall include an earthing connection preferably at the base plate which s
20、upports the ingot. If the installation enables several melting stations to be supplied from the same power supply, each station should be provided with an earth connection. If the power circuit is multiple-earthed, care shall be taken about the current which flows between the earthing points and thr
21、ough components of the furnace. 2) The circuit of any melting station which is not working shall be isolated from the supply but not from earth. 3) The following conditions shall be satisfied for the power circuit before switching-on: a) Melting station change-over switches in closed position. The s
22、tation in operation shall be indicated on the control board. b) Electrode and ingot mould aligned in melting position. c) Base plate in operating position. d) Removable contact-making devices in closed position; in particular electrode clamps or contact shoes, either closed or at least with minimum
23、pressure if a hydraulic or pneumatic system is used or locked if the system is mechanically operated. The same requirement shall be met by the clamping of the ingot base plate. e) Connections of cooling circuit, if provided, in working order (flow, pressure, temperature). 3.3 Auxiliary low-voltage c
24、ircuits 3.3.1 Control station The following indications and controls should be grouped in the control room: flow indication of ingot mould cooling circuit; secondary current and voltage measurement; control of movements likely to occur during melting (furnace on-load); setting of desired operating v
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