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Medium Voltage Fuses Catalogue Ca132062en Bussmann series Medium voltage fuse links catalogue SERIES Leadership in fusible circuit protection solutions Contact details Customer satisfaction team Online resources Eaton’s customer satisfaction team is available to answer Visit www.eaton.com/bussmannseries for the following questions regarding Eaton’s Bussmann series products. resources: Europe calls can be made between: • Product cross reference Monday — Friday 7.30 a.m. - 5.00 p.m. GMT • Product profiles • Online catalogues for the latest United States and European catalogues. The customer satisfaction team can be reached via: Phone: 00 44 (0) 1509 882 600 Application engineering Fax: 00 44 (0) 1509 882 786 Email: [email protected] Application engineering assistance is available to all customers. The application engineering team is staffed by university-qualifi ed electrical engineers who are www.my.eaton.com available with technical and application support. European calls can be made between: www.my.eaton.com supports the following product Monday — Thursday 8.30 a.m. - 4.30 p.m. GMT lines: B-Line series, Bussmann series, Crouse-Hinds Friday 8.30 a.m. - 4.00 p.m. GMT series, Lighting solutions, Cooper Power series and Wiring devices. Application engineering can be reached via: Get started today at www.my.eaton.com by clicking Phone: 00 44 (0) 1509 882 699 ‘Request User ID and Password’. Fax: 00 44 (0) 1509 882 794 • Easy to Navigate • Simple to Use General technical enquiries: [email protected] • Real-Time Data High speed technical enquiries: [email protected] 2 EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—October 2017 www.eaton.com We make what matters work.* At Eaton, we believe that power is a fundamental part * of just about everything people do. That’s why we’re dedicated to helping our customers find new ways to manage electrical, hydraulic and mechanical power more efficiently, safely and sustainably. To improve people’s lives, the communities where we live and work, and the planet our future generations depend upon. Because this is what really matters. And we’re here to make sure it works. To learn more go to: Eaton.com/whatmatters We make what matters work. EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—October 2017 www.eaton.com 3 Company overview Eaton is the leading source of fusible circuit protection solutions in the global marketplace. Eaton’s Bussmann series products are approved for use around the world and meet agency requirements and international standards: IEC, VDE, DIN, UL, CSA, BS and others. The headquarters for Eaton’s Bussmann series product line is located in Burton-on-the-Wolds, Leicestershire (UK) and is part of Eaton’s Industrial Control and Protection EMEA division. Eaton manufactures over 50,000 Bussmann series part numbers, covering extensive fusible circuit protection solutions for a wide range of applications: residential, industrial, motor protection, power conversion and distribution. Eaton has been a leading exponent in the design, development and manufacture of fuse links and their associated accessories for more than 100 years and has supplied fuse links to more than 90 countries worldwide. Eaton's team of specialist Engineers and Field Applications Engineers plays a leading role in international standardisation of fuse links offering comprehensive advice on selection and applications. With a continual commitment to meet our customers' needs with innovative high quality products with ISO 9001 'approval systems', Eaton is the supplier of choice for circuit protection solutions. 4 EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—October 2017 www.eaton.com Table Contents Introduction to medium voltage fuse link technology. 6 How to order . 8 DIN Fuse links . 9 Motor fuse links . 23 Auxiliary transformer fuse links . 33 Oil fuse links . 53 British standard air fuse links . 61 US Style E-Rated fuse links . 73 Fuse clips . 91 Expulsion fuse links . 92 ASL - Automatic Sectionalising Links . 94 Boric acid fuse links . 98 Cross references . 105 DIN Fuse links . 105 Motor fuse links . 107 Voltage and auxiliary transformer fuse links . 107 Oil fuse links . 108 British standard air fuse links . 109 US Style E-Rated fuse links . 110 Boric acid fuse links . 115 Time current curves and cut-off curves list . 116 Index . 118 EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—October 2017 www.eaton.com 5 Introduction to medium voltage fuse link technology Offering unparalleled short-circuit interruption capabilities, The main standard covering Medium voltage (MV) fuse links is Medium Voltage (MV) current-limiting fuse links are the IEC 60282-1, 2009. IEC defi nes MV as from 1 kV to 72.5 kV. principle protection device used by electrical utilities and switchgear manufacturers throughout the world. Current-limiting MV Fuse links, split into three internationally recognised types: back-up (or sometimes called partial range), Safe, reliable, environmentally friendly and cost effective, fuse links, which will interrupt any current from their rated MV Fuse links are the protection device of choice for Breaking capacity down to a Minimum breaking current, distribution circuits due to their speed of operation and specifi ed by the manufacturer. General purpose MV Fuse links current limiting ability in the event of a short-circuit fault. will interrupt all currents that will melt the elements within one hour. Full range MV Fuse links can interrupt any current below The diagram below shows the operation of a fuse link the rated Breaking capacity that melts the fuse elements interrupting a short-circuit fault, achieving a current zero well satisfactorily. within the fi rst half-cycle of a fault. Energy let-through into the site of a fault maybe typically only 1/500th of that of any other The diagram below illustrates the three performance criteria in type of switching device. terms of their Minimum breaking current I3. Medium Voltage electrical fuse link performance to IEC 60282-1 Back-Up RMS Zone of uncertain protection l2t amps Fuse Link Time in seconds General Purpose Zone of uncertain Peak amps Fuse Link protection l2 Full Range Fuse Link Current (amps) Minimum fusing Minimum Breaking current in free air Minimum Breaking Current (MBC) I 3 Typically 1.4 x I Current (MBC) Typically 1.1 x I N N Typically 3 x IN Minimum fusing Minimum Breaking current under Current (MBC) DERATED conditions Typically 1.8 x IN Current-limiting MV Fuse links are similar in construction to Low voltage (LV) cartridge types. Fuse elements do need to be much longer however to safely interrupt a medium voltage short-circuit. This is achieved by winding the elements round an internal core or holder, often called a star-core or spider; using this technique a one metre length element can be accommodated in a 250 mm length body. The elements are surrounded by a pure, highly compacted granular quartz fi ller. Like a LV fuse link, a MV Fuse link has a ceramic body. Most current-limiting MV Fuse links are also fi tted with a striker mechanism. This is used to operate the trip bar or mechanism in a fuse-switch combination, fuse-switch or ring main unit (RMU) to achieve low overload fault interruption and three-phase disconnection. The speed of operation reduces the effect of short-circuit Typically striker mechanisms are driven by a spring currents, dramatically limiting the energy delivered to the mechanism, triggered by a thin striker wire or striker coil faulted circuit, preventing the catastrophic results of high running the length of the fuse link, connected in parallel to faults and disturbing voltage arcs. The fuse link operation the fuse link elements. The striker coil is of much higher signifi cantly limits the arc-fl ash hazard at the fault location. resistance than the fuse link elements, so a current only fl ows Improved power supply quality also results from the use through the striker coil when the fuse link elements melt. The of fuse links. High fault currents are interrupted in a few current heats up the striker coil and this in turn melts the wire milliseconds, minimising voltage dips in system supply voltage. retaining the spring, releasing it and pushing out the striker. 6 EATON’S BUSSMANN SERIES MEDIUM VOLTAGE FUSE LINKS CA132062EN—October 2017 www.eaton.com Introduction to medium voltage fuse link technology Porcelain Porcelain barrel End cap barrel Striker coil Striker Granular quartz Striker coil Starcore Fuse elements Star core Weather seal Granular quartz Elements Non-current limiting Typically an Eaton’s Bussmann series MV Fuse link of a given rating may run 10-30oC cooler than comparable fuse links Essentially, non-current limiting fuse links have short elements which do not employ M-effect. This advantage is particularly and incorporate some means of lengthening the arc after the useful when the MV Fuse link is used in totally enclosed all element melts, extinguishing the arc and preventing re-ignition. insulated switchgear, such as cast resin fuse-switches or These are known as expulsion fuse links. compact SF6 insulated Ring Main Units (RMUs), or GIS HV switchgear, since less derating is required and hence a smaller Expulsion fuse links are an effective way of protecting rating of MV Fuse link will do the same job as a higher rated overhead distribution lines and transformers. They are MV Fuse link from another manufacturer. designed for outdoor use only and comprise a tin or copper fuse element in series with a fl exible braid in a tube. The tube In short M-effect fuse links are generally safer, give better forms one side of a triangle, with a latched connection at protection and are longer lasting than alternative designs, the top and a hinge at the bottom. The braid emerges from which do not employ these valuable features.
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