Energy Distribution SBU 1 01/2016 SPX and SPX 3 -V fuse carriers for blade type fuses

Energy Distribution SBU 2 Introduction

Energy Distribution SBU 3 Fuse switches are mostly used as a protections of outgoings both in main and secondary switchboards Most typical type of loads protected by fuse switches: - cables - motors (protection against short-circuit) - semiconductors (UPS batteries protection or telecom power supplies) - additional protection of SPD's - protection of capacitors in capacitors banks - protection of solar power supplies Where?

Energy Distribution SBU 4 When could it be useful to evaluate a fuses solution instead of an MCCB one? - In cases of very low price compared to MCCBs (half or even one third of MCCB price) and - In particular technical parameters needs (ability to limit efficiently high short-circuit currents up to kA good protection for cables) When?

Energy Distribution SBU 5 International standards International standard that regulates fuses and fuse holders is IEC – 3 Switches, disconnectors, switch-disconnectors and fuse-combination units It’s mandatory to pass withstand testing with x1.6 rated current over a period of one hour

Energy Distribution SBU 6 High interrupt ratings Modern current-limiting fuses have high interrupting ratings at no extra cost. Whether for the initial installation or system updates, a fusible system can maintain a sufficient interrupting rating. This helps with achieving high assembly short-circuit current ratings High SCCR High assembly short-circuit current ratings can be achieved Rejection Features Current-limiting fuses have rejection features which, when used with rejection fuse clips, assure replacement with a device of the same voltage rating and equal or greater interrupting rating. In addition, rejection features restrict the fuses used for replacement to ones of the same class or type. Benefits offered by Current-Limiting Fuses

Energy Distribution SBU 7 Flexibility Increased flexibility in panel use and installation. Valuable time that was spent gathering information for proper application is drastically reduced with fuses since: Fuses can be installed in systems with available fault currents up to 200kA or 300kA covering the majority of installations that exist. Fuses can handle line-to-ground fault currents up to their marked interrupting rating. Fuses have a straight voltage rating instead of a slash voltage rating. A device with a slash voltage rating is limited to installation in ONLY a solidly grounded wye type system. Fuses can be installed in any type of installation independent of the grounding scheme used. Reliability Fuses provide reliable protection throughout the life of the installation. After a fault occurs, fuses are replaced with new factory calibrated fuses assuring the same level of protection that existed previous to the fault. Benefits offered by Current-Limiting Fuses

Energy Distribution SBU 8 No Venting Fuses do not VENT. Therefore fuses will not affect other components in the panel while clearing a fault. Additional guards or barriers are not required. Component Protection via current limitation Current limitation provides protection of circuit components for even the most susceptible components such as equipment grounding conductors. Selective Coordination Achieving selective coordination is simple. Typically selective coordination can be achieved between current-limiting fuses by simply maintaining a minimum amp ratio between upstream and downstream fuses. This can aid in diagnostics within the building electrical system or machine panel as only the affected circuit is isolated. Selective coordination helps isolate faulted circuits from the rest of the system and prevents unnecessary power loss to portions of a building. Benefits offered by Current-Limiting Fuses

Energy Distribution SBU 9 Both types of devices can meet the needed requirements, but are circuit breakers or fuses best suited for a particular application? Unfortunately, there is no simple answer to this question—several other factors must be taken into account, such as the level of protection provided, selective coordination requirements, reliability, renewability and costs. A comparison: fuses vs circuit breakers

Energy Distribution SBU 10 In case of large short circuit currents, no other protection system is faster than the fuse. The consequence is that the peak current is limited down to low values by the fuse. Fuses speed/peak let through current

Energy Distribution SBU 11 Talking about fuses systems, it’s mandatory to distinguish between -Maintenance BEFORE a short circuit and -Maintenance AFTER a short circuit Fuses maintenance BEFORE No particular maintenace is needed, because fuse characteristics doesn’t change AFTER Need to replace blown fuse with a new one, with the right safety precautions

Energy Distribution SBU 12 Selective coordination of overcurrent protective devices is required to ensure that two somewhat mutually-exclusive goals are met—faults should be cleared from the system as quickly as possible in order to minimize damage to equipment, while the act of clearing the faults from the system should interrupt power to as small a portion of the system as possible. Fuses selective coordination For a given overcurrent, a specific fuse, under the same circumstances, will open at a time within the fuse’s time-current band. Fuses have an inverse time-current characteristic, which means the greater the overcurrent, the faster they interrupt Selectivity between two fuses operating under short-circuit conditions exists when the total clearing energy of the loadside fuse is less than the melting energy of the lineside fuse. The following explains this process.

Energy Distribution SBU 13 Phase-to-ground faults are the most common form of electrical faults (95% to 98%) Ground faults are the most destructive type of electrical fault. Fuses do NOT provide selective coordination from most phase-to-ground faults When ground-fault protection is required in a fusible system, the disconnecting means (usually a switch, sometimes a contactor) must be capable of tripping automatically, and external relaying and a zero- sequence CT or set of residually-connected phase CTs must be installed to detect the ground faults and send the trip signal to the disconnecting means. Ground fault protection

Energy Distribution SBU 14 Fuses motor protection PROBLEM Motor Starting Currents When an AC motor is energized, a high inrush current occurs. Typically, during the initial half cycle, the inrush current is often higher than 20 times the normal full load current. SOLUTION Fast Acting Fuses To offer overload protection, a protective fuse, depending on its application and the motor’s Service Factor (SF), should be sized to prevent damages.

Energy Distribution SBU 15 The use of fuses has the potential to produce a severe unbalance condition commonly referred to as single-phasing. Single-phasing occurs when one phase in a three-phase motor circuit opens but the other two phases remain in service. If the single-phasing occurs upstream of the motor but at the same voltage level, then zero current flows on the phase with the open fuse and elevated current levels flow in one or both of the remaining phases. To help guard against motor damage or failure due to single-phasing size motor circuit fuses closer to the full-load current rating of the motor. Fuses motor protection: a drawback

Energy Distribution SBU 16 One of the great advantages of a current-limiting overcurrent protective device is that it can literally limit the peak magnitude of fault current that flows through it by opening within the first half-cycle after fault initiation, before the fault current has a chance to reach its peak value. Highly current-limiting fuses for special applications, such as semiconductor fuses that are designed to protect power electronic equipment, are also available. Fuses semiconductor protection

Energy Distribution SBU 17 The higher the ambient temperature, the hotter the fuse will operate, and the shorter its life will be. Conversely, operating at a lower temperature will prolong fuse life. A fuse also runs hotter as the normal operating current approaches or exceeds the rating of the selected fuse. Fuses temperature derating

Energy Distribution SBU 18 Fuse carrier selection

Energy Distribution SBU 19 Fuse carriers: different approaches Blade type cartridge fuses SPX-D SPX and SPX 3 -V

Energy Distribution SBU 20 Fuse holders: different approaches Blade type cartridge fuses  Cheapest approach  Chance to mount poles one-aside-one  Reliability difficulties  it’s not simple to substitute fuses:

Energy Distribution SBU 21 Fuse holders: different approaches  very quick exchange between status (ON/OFF)  simplified and robust load commutations  status switching time indipendent by handling time  DIN Rail mounting possibility SPX-D

Energy Distribution SBU 22 Fuse holders: different approaches  Safe circuits interruption  Handle to simplify fuses extraction  Electrical test input via  status switching time dipendent by handling time  Busbar or plate (just SPX) mounting SPX and SPX 3 -V

Energy Distribution SBU 23 The offer

Energy Distribution SBU 24 On a woldwide scenario, on many plants there could be the necessity to protect devices with fuses. Accomplishing this idea, Legrand has enhanced its fuse carriers offers: with new SPX and SPX 3 -V devices it’s possible to protect against short-circuits and overloads and to disconnect electric circuit parts without load or at full load, maintaning switching selectivity. To manage the power over the busbar system, a new MCCB adapter has been designed to integrate our DPX breakers. A view on the offer

Energy Distribution SBU 25 A view on the offer SPX 3 -V SPX

Energy Distribution SBU 26 SPX 3 -V

Energy Distribution SBU 27. Vertical DIN fuse carriers. 185mm busbar mounting. Standard IEC Transparent window to check fuses. Simultenous switching of all poles. Wide range of fuses dimensions (from 00 to 3). Standard range of currents (from 160 A to 630 A). Chance to integrate DPX MCCBs SPX 3 -V overview

Energy Distribution SBU 28 SPX 3 -V overview Just 2 frames to allow protection from 160A to 630A: Frame 1: 160A deep (ready for current transformers accessorizing) Frame 2: same for 250A, 400A and 630A Adapter for DPX , to allow the managing of main power by Legrand MCCB breakers, with simple and quick mount on 185mm busbar system

Energy Distribution SBU 29 SPX 3 -V overview Hinged windows for time-saving mounting and no need to dismantle the fuse disconnector Easily accessible cable terminal compartment Lid can be locked in the open and closed positions Lid position monitoring with two signalling switches per lid Easy switching thanks to ergonomic operating handle Considerable scope for cable connecting Outgoing feeder connections top or bottom Lid can be lead-sealed

Energy Distribution SBU 30 SPX 3 -V overview: parking position The lids of the 1-pole switching fuse disconnectors can be unhinged. A safe parking position is assured from them being turned over and re- mounted. The lid can no longer be inadvertently closed.

Energy Distribution SBU 31 SPX 3 -V overview: cooling and ventilation Exhaust ducts for arching gases: no more need of arching chambers Ventilation ducts to reduce overheating The lateral ducts of the SPX 3 -V produce a kind of draw-off chimney which acts as a cooling and ventilation system and pinpoints the discharge of switching gases and heat.

Energy Distribution SBU 32 SPX 3 -V overview: busbar mounting Accessories for mounting on drilled and undrilled bars (without or with covers). Easy access to mounting screws. No more need to dismantle the product to install it

Energy Distribution SBU 33 SPX 3 -V overview: busbar mounting Mounting with M8/M12 bolt connection Three M8/M12 screws can be used to fix the fuse disconnector onto either drilled or punched busbars in the traditional method after the added labour of drilling holes in the busbars.

Energy Distribution SBU 34 SPX 3 -V overview: connection on terminals Hinged connection compartment

Energy Distribution SBU 35 SPX 3 -V overview: connection on terminals Multiple connection possibility and accessories Box terminal No additional terminal compartment cover is needed when using a box terminal for the connection. Drawer-type method The drawer-type method allows for a considerable variation in connections. Connection can be flexibly made with either nut or stud bolt – depending on installation requirements. An additional terminal housing cover is needed when using a cable lug for the connection. These covers can be linked in series to form longer covers.

Energy Distribution SBU 36 SPX 3 -V overview: current transformers A complete range of integrated Current Transformers Currents from 80 to 600A Class accuracy 1 No additional space required Simplified installation

Energy Distribution SBU 37 SPX 3 -V overview: adapter for Legrand MCCB Adapters enable circuit breakers to be quickly and easily mounted on the 185 mm busbar system. They can be used for both feed- and tap-mounting of circuit breakers to the busbar system. Compatibility is given to all DPX family circuit breakers Space-saving integration of current transformers can be accommodated on the adapter assembly

Energy Distribution SBU 38 SPX 3 -V range ReferenceNominal current Fuse cartridge size A A A A3 DIN NH in-line fuse switch disconnector, 3-pole switchable, connection top/bottom

Energy Distribution SBU 39 Cage terminals Prism terminals for flexible copper rail conductor, flexible or rigid multicore copper cables and aluminium cables SPX 3 -V accessories ReferenceConductor sizeSPX 3 -V frame – 95 mm A – 240 mm 2 250/400/630 A – 400 mm 2 250/400/630 A

Energy Distribution SBU 40 Signalling contact To show the status of the cover: 5 A with 250Vac or 4 A with 30Vdc SPX 3 -V accessories ReferenceSPX 3 -V frame All frames

Energy Distribution SBU mm busbar support universal busbar support 185mm for drilled and undrilled flat busbars SPX 3 -V accessories ReferenceNumber of poles

Energy Distribution SBU 42 DPX MCCB adapter 185 mm busbar system adapter for all DPX , connections with the circuit breaker on top or on the bottom, screw connection to drilled busbars SPX 3 -V accessories ReferenceLink Top connection Bottom connection

Energy Distribution SBU 43 Current transformers accuracy class 1, secondary rated current 5A SPX 3 -V accessories ReferenceRated currentSPX 3 -V frame A160 A A160 A A250/400/630 A A250/400/630 A A250/400/630 A A250/400/630 A A250/400/630 A

Energy Distribution SBU 44 SPX

Energy Distribution SBU 45. Horizontal fuse carriers. Plate or busbar mounting. Standard IEC Transparent window to check fuses. Simultenous switching of all poles. Complete range of fuses dimensions (from 000 to 3). Complete range of currents (from 125 A to 630 A) SPX overview

Energy Distribution SBU 46 SPX plate mounting ReferenceNominal currentFuse size A A A A A

Energy Distribution SBU 47 SPX 60 mm busbar mounting ReferenceNominal current Fuse cartridge size A A A A A3

Energy Distribution SBU 48 Cage terminals Prism terminals for copper and aluminium rail conductor, flexible or rigid multicore copper cables and aluminium cables SPX accessories ReferenceConductor sizeSPX frame – 70 mm A – 150 mm A – 240 mm A – 300 mm A

Energy Distribution SBU 49 Terminal shields To fix at top or bottom of fuse carrier SPX accessories ReferenceSPX frame A, plate mounting A, busbar mounting A, all mounting A, all mounting

Energy Distribution SBU 50 Signalling contact To show the status of the cover: 5 A with 250Vac or 4 A with 30Vdc SPX accessories ReferenceSPX frame All frames

Energy Distribution SBU 51 60mm busbar support Isolating support for 12, 15, 20, 25, 30 x 5, 10mm flat rigid copper rails. It can be installed in XL 3 400/800/4000 distribution board using vertical adaptors for uprights. SPX accessories ReferenceNumber of poles

Energy Distribution SBU 52 Covers SPX accessories ReferenceDetails Cover for 60 mm busbar system Support for cover

Energy Distribution SBU 53 Annex A Characteristics

Energy Distribution SBU 54 SPX 3 -V electrical characteristics

Energy Distribution SBU 55 SPX 3 -V connection characteristics sm: stranded sectored se: solid sectored rm: stranded round re: solid round f: flexible AE: wire-end ferrules

Energy Distribution SBU 56 SPX electrical characteristics

Energy Distribution SBU 57 SPX connection characteristics sm: stranded sectored rm: stranded round f: flexible AE: wire-end ferrules

Energy Distribution SBU 58 Annex B Dimensions

Energy Distribution SBU 59 SPX 3 -V dimensions SPX 3 -V 00

Energy Distribution SBU 60 SPX 3 -V dimensions SPX 3 -V 1/2/3

Energy Distribution SBU 61 SPX dimensions SPX 000, plate mounting SPX 00, plate mounting

Energy Distribution SBU 62 SPX dimensions SPX 1/2/3, plate mounting

Energy Distribution SBU 63 SPX dimensions SPX 000, busbar mounting SPX 00, busbar mounting

Energy Distribution SBU 64 SPX dimensions SPX 1/2/3, busbar mounting

Energy Distribution SBU 65 SPX dimensions (accessories) Terminal shieldsSignalling contact

Energy Distribution SBU 66 SPX dimensions (accessories) Covers 60mm busbar support

Energy Distribution SBU 67 SPX 3 -V dimensions 185 mm busbar system support

Energy Distribution SBU 68 Annex C Maximum fuses power ratings

Energy Distribution SBU 69 Fuses selecting table for SPX 3 -V Please note: these values are for guidance only; check compliance of fuses maximum power dissipation and rated current on corresponding datasheets

Energy Distribution SBU 70 Fuses selecting table for SPX Please note: these values are for guidance only; check compliance of fuses maximum power dissipation and rated current on corresponding datasheets

Energy Distribution SBU 71 Annex D Diazed fuse holders

Energy Distribution SBU 72 Legrand diazed fuse holders range ReferenceDescription Diazed base up to 25A Diazed base up to 63A mm wide cover for diazed base up to 25A mm wide cover for diazed base up to 25A mm wide cover for diazed base up to 63A mm wide cover for diazed base up to 25A Devices for the protection of the electric circuits from overcharge and short circuit using D0 fuses type. They have to be installed in 60mm BUS-BAR systems. The D0 fuses have a high value of Icu and their maintenance and substitution is very fast and easy.

Energy Distribution SBU 73

Energy Distribution SBU 74