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innovative enclosure solutions for industrial & electronic applications<br />
Innovative enclosure solutions<br />
for industrial & electronic applications<br />
22035 Canzo - Como (Italy)<br />
Via Monte Barzaghino, 6<br />
Tel. 031.673.611 - Fax 031.670.525<br />
www.eta.it<br />
infosede@eta.it<br />
<strong>ETA</strong> S.p.A. France<br />
Rue du Pré aux Boeufs BP 455<br />
76806 SAINT ETIENNE DU ROUVRAY<br />
Tel. ++33 (2) 35 64 34 70<br />
Fax ++33 (2) 35 64 22 75<br />
eta-france@wanadoo.fr<br />
<strong>ETA</strong> Enclosures (UK) Limited<br />
Unit 4, Kea Park Close,<br />
Hellaby Industrial Estare<br />
<strong>Busbar</strong><br />
Rotherham South Yorkshire S66 8LB<br />
<strong>System</strong> <strong>Overview</strong><br />
Tel. ++44 (0) 1709 730111<br />
Fax ++44 (0) 1709 544088<br />
www.eta-enclosures.co.uk<br />
info@eta-enclosures.co.uk<br />
Le misure sono indicative,<br />
La <strong>ETA</strong> si riserva di variarle<br />
al fine di migliorare il prodotto.<br />
© <strong>ETA</strong> SpA September 2004
INTRODUCTION<br />
Power Distribution with <strong>Busbar</strong> <strong>System</strong>s<br />
for Low Voltage Industrial Automation<br />
The main incoming feeder, as well as the outgoing terminals,<br />
switchgear adaptors and fuse bases are mounted directly onto the busbar system<br />
with 60 mm centre line spacing<br />
• Improved efficiency<br />
because physical fixing and electrical connection of the various<br />
components is carried out at the same time.<br />
• Improved convenience<br />
because all the components are mounted directly onto<br />
the feeding busbar system.<br />
• Improved flexibility<br />
because all the connections are done without having to drill<br />
the busbars.<br />
• Improved versatility<br />
because the wide range of available components allows the realization<br />
of the most diverse customer applications.<br />
• Improved safety<br />
because the various available covers guarantee the protection degree<br />
of IP20.<br />
EFFICIENCY - FLEXIBILITY - SAFETY<br />
• Improved reliability<br />
because the snap-on mechanisms and the hook-shaped rear contacts<br />
eliminate the need to check the tightening torques<br />
of the busbar connections.<br />
• Improved security<br />
because the short circuit tests certified by the CESI-institute<br />
guarantee higher values compared to traditional wiring.<br />
• Improved servicing<br />
because in all cases of alterations or maintenance work<br />
in an existing panel, with the busbar-technology, the possible<br />
down-time of a machine is reduced to a minimum,<br />
whilst incorrect wiring is almost excluded.<br />
• Improved aesthetics<br />
because the modular and logical structure of a busbar system<br />
makes the whole panel look more organised.
code<br />
mod. art. description<br />
WO 01495 busbar support, 3 pole<br />
WO 01489 busbar support, 1 pole<br />
WO 01573 side cover for 3 pole support<br />
WO 01244 cover for single busbar 12 -30 x 5 mm, length = 1 m<br />
WO 01245 cover for single busbar 12 - 30 x 10 mm, length = 1 m<br />
WO 01025 front cover for 3 pole busbar system, length = 1,10 m<br />
WO 01026 holder for snap in mounting of front cover WO 01025<br />
BUSBARS, BUSBAR SUPPORTS, COVERS<br />
Supports and covers<br />
for 60 mm system<br />
with flat copper bars<br />
(up to 630 A)<br />
• for flat busbars of dimensions 12 – 30 x 5/10 mm<br />
• adjustable to the various busbar widths<br />
• associated covers IP20 for blank busbar sections<br />
(without components fitted onto it)<br />
Flat copper busbars<br />
12 – 30 x 5 /10 mm<br />
• tin-plated versions require less time for preparing<br />
of the connection points and are protected<br />
against aggressive environments<br />
• edges slightly rounded (radius 0,3 – 0,7)<br />
for a better grip of the components on the busbars<br />
code<br />
mod. art. description<br />
WO 01618 tin plated copper, length = 2,40 m 12 x 5 mm, 200 A<br />
WO 01619 tin plated copper, length = 2,40 m 15 x 5 mm, 250 A<br />
WO 01620 tin plated copper, length = 2,40 m 20 x 5 mm, 320 A<br />
WO 01621 tin plated copper, length = 2,40 m 25 x 5 mm, 400 A<br />
WO 01622 tin plated copper, length = 2,40 m 30 x 5 mm, 450 A<br />
WO 01623 tin plated copper, length = 2,40 m 12 x 10 mm, 360 A<br />
WO 01624 tin plated copper, length = 2,40 m 20 x 10 mm, 520 A<br />
WO 01625 tin plated copper, length = 2,40 m 30 x 10 mm, 630 A<br />
WO 01204 tin plated copper, length = 3,60 m 30 x 10 mm, 630 A<br />
NB: The above given current values are only approximate;<br />
for more precise evaluation of the possible thermal load of the various busbars<br />
please refer to the diagram on the back of this folder.<br />
Supports and covers<br />
for 60 mm system<br />
with T-shaped busbars<br />
(up to 2500 A)<br />
• for double or triple T-shaped copper busbars<br />
with high current loads,<br />
maintaining the 60 mm centre line spacing<br />
• associated covers IP20 for blank busbar sections<br />
(without components fitted onto it)<br />
• cover strips to close the top/bottom gaps<br />
between the standard components/front cover<br />
and the mounting plate of the panel<br />
code<br />
mod. art. description<br />
WO 01231 busbar support for double T-shaped busbars, 3 pole<br />
WO 01232 busbar support for triple T-shaped busbars, 3 pole<br />
WO 01876 busbar support for double T-shaped busbars, 1 pole<br />
WO 01234 side cover for 3 pole supports WO 01231/2<br />
WO 01252 cover for one single T-shaped busbar, length = 1 m<br />
WO 01025 front cover for 3 pole busbar system<br />
WO 01026 holder for snap in mounting of front cover WO 01025<br />
WO 01236 cover strip for top / bottom of busbar system, depth = 36 mm<br />
WO 01237 cover strip for top / bottom of busbar system, depth = 72 mm<br />
WO 01238 cover strip for top / bottom of busbar system, depth = 108 mm<br />
Double and triple<br />
T shaped busbars<br />
• double T-shapes up to 1250 A<br />
(thinner cross section)<br />
or 1600 A (full cross section)<br />
• triple T-shapes up to 2500 A<br />
• tin-plated versions require less time for preparing<br />
of the connection points and are protected<br />
against aggressive environments<br />
• outgoing components are fitted onto the front part<br />
of the T-shaped busbars (= 30 x 10 mm)<br />
code<br />
mod. art. description<br />
WO 01609 tin plated copper, length = 2,40 m double T-shape, 1250 A<br />
WO 01224 tin plated copper, length = 3,60 m double T-shape, 1250 A<br />
WO 01608 tin plated copper, length = 2,40 m double T-shape, 1600 A<br />
WO 01190 tin plated copper, length = 3,60 m double T-shape, 1600 A<br />
WO 01250 plain copper, length = 2,40 m double T-shape, 1250 A<br />
WO 01223 plain copper, length = 3,60 m double T-shape, 1250 A<br />
WO 01249 plain copper, length = 2,40 m double T-shape, 1600 A<br />
WO 01229 plain copper, length = 3,60 m double T-shape, 1600 A<br />
WO 01187 tin plated copper, length = 2,40 m triple T-shape, 2500 A<br />
WO 01227 tin plated copper, length = 3,60 m triple T-shape, 2500 A<br />
NB: The above given current values are only approximate;<br />
for more precise evaluation of the possible thermal load of the various busbars<br />
please refer to the diagram on the back of this folder.
TERMINAL PLATES, COVER CAPS TERMINAL CLAMPS<br />
Connecting terminal<br />
plates up to 800 A<br />
• with three terminal clamps for connection of cables<br />
or flexible copper bars<br />
• mounting onto the 60 mm busbar<br />
without having to drill the bars<br />
• including phase separators and cover cap<br />
• cable connection top or bottom<br />
or even for through cables<br />
code<br />
mod. art. cross section<br />
WO 01240 6 - 50 mm2 / flexible copper 6 x 9 x 0,8 mm width = 54 mm<br />
WO 01243 35 - 120 mm2 / flexible copper 10 x 15,5 x 0,8 width = 81 mm<br />
WO 01199 95 - 185 mm2 width = 135 mm<br />
WO 01754 150 - 300 mm2 width = 135 mm<br />
WO 01753 flexible copper up to 10 x 32 x 1 mm width = 135 mm<br />
Cover caps<br />
for terminal clamps<br />
• for single terminal clamps<br />
• to be mounted onto all 60 mm busbar systems<br />
• to cover a group of single terminal clamps<br />
or every single terminal clamp according<br />
to the total width of the cover cap<br />
code<br />
mod. art. description<br />
WO 01590 for univ. term. clamps and flex. copper connectors width = 54 mm<br />
WO 01413 for univ. term. clamps and flex. copper connectors width = 84 mm<br />
WO 01756 for all kind of terminal clamps up to 2500 A width = 135 mm<br />
WO 01757 for all kind of terminal clamps up to 2500 A width = 270 mm<br />
<strong>Busbar</strong> system<br />
connectors<br />
• for horizontal connection<br />
of two identically shaped busbars<br />
• to join busbars<br />
in very long panel board arrangements<br />
• to join single cubicles with shorter busbars inside<br />
(e.g. for transportation, …)<br />
• outgoing components are fitted onto the front part<br />
of the T-shaped busbars (= 30 x 10 mm)<br />
code<br />
mod. art. for connection of busbar types max dist. between busbars<br />
WO 01166 flat copper bars 12 - 20 x 5 mm 5 - 10 mm<br />
WO 01193 flat copper bars 12 - 20 x 5 mm 100 - 110 mm<br />
WO 01990 flat copper bars 20 - 30 x 5 / 10 mm 9 - 20 mm<br />
WO 01141 flat copper bars 20 - 30 x 5 / 10 mm 50 - 60 mm<br />
WO 01886 flat copper bars 20 - 30 x 5 / 10 mm 100 - 110 mm<br />
WO 01827 double T-shaped busbars 9 - 20 mm<br />
WO 01145 double T-shaped busbars 50 - 60 mm<br />
WO 01829 double T-shaped busbars 100 - 110 mm<br />
WO 01274 triple T-shaped busbars 50 - 60 mm<br />
WO 01275 triple T-shaped busbars 100 - 110 mm<br />
Terminal clamps<br />
up to 630 A<br />
• for direct connection of cables<br />
without cable lugs or wire end ferrules<br />
• for direct connection of flexible copper bars<br />
without holes<br />
• connection onto the busbar system<br />
in any required position<br />
without depending on distances of predrilled holes<br />
• associated IP20 cover caps<br />
Universal terminal clamps<br />
code<br />
mod. art. cross s. / space (width x height) for use on busbars<br />
WO 01284 1,5 - 16 mm2 / 7x5 x 7,5 mm 12 - 30 x 5 mm<br />
WO 01285 4 - 35 mm2 / 10,5 x 11 mm 12 - 30 x 5 mm<br />
WO 01287 16 - 70 mm2 / 14 x 14 mm 12 - 30 x 5 mm<br />
WO 01068 16 - 120 mm2 / 17 x 15 mm 12 - 30 x 5 mm<br />
WO 01289 1,5 - 16 mm2 / 7x5 x 7,5 mm 12 - 30 x 10 mm<br />
WO 01290 4 - 35 mm2 / 10,5 x 11 mm 12 - 30 x 10 mm<br />
WO 01292 16 - 70 mm2 / 14 x 14 mm 12 - 30 x 10 mm / T-shapes<br />
WO 01203 16 - 120 mm2 / 17 x 15 mm 12 - 30 x 10 mm / T-shapes<br />
Brace terminals<br />
code<br />
mod. art. cross s. / max rated current for use on busbars<br />
WO 01318 95 - 185 mm2 / max. 500 A 20 - 30 x 5 / 10 mm / T-shapes<br />
WO 01760 150 - 300 mm2 / max. 600 A 20 - 30 x 5 / 10 mm / T-shapes<br />
WO 01759 up to 32 x 10 mm / max. 800 A 20 - 30 x 5 / 10 mm / T-shapes<br />
Flexible copper connectors<br />
code<br />
mod. art. cross s. / space (width x height) for use on busbars<br />
WO 01996 25 x 20 mm 12 - 25 x 5 / 10 mm<br />
WO 01997 30 x 20 mm 12 - 30 x 5 / 10 mm<br />
WO 01586 30 x 30 mm 12 - 30 x 5 / 10 mm<br />
WO 01587 30 x 35 mm 12 - 30 x 5 / 10 mm<br />
WO 01616 32 x 40 mm 12 - 30 x 5 / 10 mm<br />
Terminals for T-shaped<br />
busbar systems<br />
up to 2500 A<br />
• to feed to or from T-shaped busbars<br />
with flexible copper bars<br />
• associated cover caps WO 01756 and WO 01757<br />
• up to 2500 A on triple T-shaped busbars<br />
• up to 1600 A on double T-shaped busbars<br />
• including 1 spacer bar to use in between<br />
the flexible copper bar and the main power busbar<br />
(if more layers of flexible copper bars<br />
are used, also more spacer bars should be used<br />
in between each layer of flexible copper!)<br />
code<br />
mod. art. cross s. / space (width x height)<br />
WO 01185 41 mm x 20 - 42 mm max. 3 flexible copper bars / 1600 A<br />
WO 01906 51 mm x 5 - 28 mm max. 2 flexible copper bars / 1600 A<br />
WO 01907 64 mm x 5 - 28 mm max. 2 flexible copper bars / 1600 A<br />
WO 01936 51 mm x 20 - 42 mm max. 3 flexible copper bars / 1600 A<br />
WO 01911 64 mm x 20 - 42 mm max. 3 flexible copper bars / 1600 A<br />
WO 01934 81 mm x 20 - 42 mm max. 3 flexible copper bars / 1600 A<br />
WO 01935 101 mm x 20 - 42 mm max. 3 flexible copper bars / 1600 A<br />
WO 01008 64 mm x 20 - 46 mm max. 3 flexible copper bars / 2500 A<br />
WO 01186 101 mm x 20 - 46 mm max. 3 flexible copper bars / 2500 A
SWITCHGEAR ADAPTORS FUSE BASES<br />
Adaptors<br />
for motor starters<br />
• for mounting of 3 pole motor starters<br />
directly onto the 60 mm busbar system<br />
• for use with all types of switchgear<br />
from various manufacturers<br />
• snap-on mounting onto all types of busbars<br />
of the 60 mm system<br />
• up to 63 A with cables already installed<br />
• 80 A with 16 mm2 terminals at the top<br />
• extension modules of 9, 45 or 54 mm width<br />
for installation of star-delta or reverse motor starters<br />
code<br />
mod. art. description<br />
WO 32430 25 A, width 45 mm 1 DIN rail<br />
WO 32431 25 A, width 45 mm 2 DIN rails<br />
WO 32432 25 A, width 90 mm 2 DIN rails<br />
WO 32442 32 A, width 54 mm 2 DIN rails<br />
WO 32444 32 A, width 72 mm 1 DIN rails<br />
WO 32455 63 A, width 54 mm 2 DIN rails<br />
WO 32456 63 A, width 63 mm 1 DIN rails<br />
WO 32459 63 A, width 81 mm 2 DIN rails<br />
WO 32467 80 A, width 54 mm 2 DIN rails<br />
NB: other versions on request<br />
code<br />
mod. art. description<br />
WO 32963 width = 9 mm, without DIN rails<br />
WO 32477 width = 45 mm, 2 DIN rails<br />
WO 32478 width = 54 mm, 2 DIN rails<br />
Adaptors<br />
Side modules<br />
Adaptors for MCCBs<br />
• for mounting of 3 pole MCCBs directly<br />
onto the 60 mm busbar system<br />
• with adjustable mounting rails<br />
for MCCBs of any supplier<br />
• cable connection between MCCB<br />
and busbar system either top or bottom<br />
code<br />
mod. art. description<br />
WO 32214 200 A, terminals on top of the adaptor<br />
WO 32215 200 A terminals on the bottom of the adaptor<br />
WO 32168 250 A, terminals on top of the adaptor<br />
WO 32216 250 A, terminals on the bottom of the adaptor<br />
WO 32262 630 A, terminals top or bottom<br />
NB: special versions for circuit breakers of ABB, SIEMENS, MOELLER,… on request<br />
Fuse switch<br />
disconnectors<br />
for NH-type fuses<br />
• for fuse links, sizes NH000 (100 A) to NH3 (630 A)<br />
• snap-on mounting directly<br />
onto the 60 mm busbar system<br />
• visible disconnection of all 3 phases<br />
• shock hazard protection<br />
• cable connection top or bottom<br />
code<br />
mod. art. description connection<br />
WO 33216 size NH000 - 100 A box terminals 50 mm2 WO 33198 size NH00 - 160 A M8 cable lug / clamp 70 mm2 WO 33601 size NH 1 - 250 A M10 cable lug<br />
WO 33602 size NH 2 - 400 A M10 cable lug<br />
WO 33603 size NH 3 - 630 A<br />
only for mounting on 10 mm thick busbars<br />
M10 cable lug<br />
WO 33148 mounting kit for use of sizes NH1 and NH2 on 5 mm busbars<br />
NB: other kinds of connection accessories on request<br />
Fuse bases<br />
for fuses type D/D0<br />
• 3 pole versions, up to max. 63 A<br />
• for fuse links type D0 (400V) or type D (500V)<br />
• snap-on mounting directly<br />
onto the 60 mm busbar system<br />
• front covers for shock hazard protection<br />
code<br />
mod. art. description<br />
WO 01647 E 18, for D0 fuses width = 27 mm<br />
WO 01980 front cover for fuse base WO 01647<br />
WO 31918 E 27, for DII fuses width = 42 mm<br />
WO 31070 front cover for fuse base WO 31918<br />
WO 31919 E 33, for DIII fuses width = 57 mm<br />
WO 31071 front cover for fuse base WO 31919<br />
NB: more versions on request<br />
code<br />
mod. art. description<br />
WO 31160 fuse base, 3 pole isolating<br />
WO 31232 load switch disconnector, 3 pole switching<br />
Fuse switch<br />
disconnectors for NFC<br />
cylindrical fuses<br />
• for cylindrical fuses 10 x 38 mm up to 32 A<br />
• 3 pole, only 27 mm wide<br />
• fuse change only possible in disconnected position<br />
• snap-on mounting directly<br />
onto the 60 mm busbar system<br />
• completely finger proof
Triple T-shaped bars - In 2500A<br />
(Tested system)<br />
• Bar part number: WO 01187; WO 01227 • Support part number: WO 01232<br />
Support CL Icw (kA Ipk (kA)<br />
distance<br />
(mm)<br />
for 1s)<br />
450 50 105<br />
500 47 99<br />
550 44 92<br />
600 41 86<br />
650 38,5 81<br />
700 36,5 77<br />
Support CL Icw (kA Ipk (kA)<br />
distance<br />
(mm)<br />
for 1s)<br />
450 50 105<br />
500 47 99<br />
550 44 92<br />
600 41 86<br />
650 38,5 81<br />
700 36,5 77<br />
Test values<br />
Values extrapolated by calculation.<br />
NB All values in the table, also test values, are valid for<br />
2 or 4 and more supports mounted at equal distances.<br />
For 3 supports at equal distances, decrease the centre<br />
line value by 15% approx. or the Icw value by 10%<br />
approx. (calculations according to EN 60865-1)<br />
Double T-shaped bars - In 1600A<br />
(Tested system)<br />
Support CL Icw (kA Ipk (kA)<br />
distance<br />
(mm)<br />
for 1s)<br />
375 50 105<br />
400 48 101<br />
450 45,4 95<br />
500 43,5 91<br />
550 40,2 84<br />
600 37,5 79<br />
650 35,4 74<br />
700 33,5 70<br />
• Bar part number: WO 01608; WO 01190; WO 01249; WO 01229<br />
• Support part number: WO 01231<br />
Test values<br />
Values extrapolated by calculation.<br />
NB All values in the table, also test values, are valid for<br />
2 or 4 and more supports mounted at equal distances.<br />
For 3 supports at equal distances, decrease the centre<br />
line value by 15% approx. or the Icw value by 10%<br />
approx. (calculations according to EN 60865-1)<br />
Double T-shaped bars - In 1250A<br />
(Tested system)<br />
• Bar part number: WO 01609; WO 01224; WO 01250; WO 01223<br />
• Support part number: WO 01231<br />
Test values<br />
Values extrapolated by calculation.<br />
NB All values in the table, also test values, are valid for<br />
2 or 4 and more supports mounted at equal distances.<br />
For 3 supports at equal distances, decrease the centre<br />
line value by 15% approx. or the Icw value by 10%<br />
approx. (calculations according to EN 60865-1)<br />
TECHNICAL DATA<br />
30x10 mm copper bars - In 630A/800A<br />
(Tested system)<br />
• Bar part number: WO 01625; WO 01204 • Support part number: WO 01495<br />
Support CL Icw (kA Ipk (kA)<br />
distance<br />
(mm)<br />
for 1s)<br />
250 30 63<br />
300 27 57<br />
350 25 53<br />
400 23,8 50<br />
450 22,4 47<br />
500 21 44<br />
550 20,2 40<br />
Support CL Icw (kA Ipk (kA)<br />
distance<br />
(mm)<br />
for 1s)<br />
250 30 63<br />
300 27 57<br />
350 25 53<br />
400 23,5 50<br />
450 21,5 45<br />
500 20,2 42<br />
550 19,5 39<br />
Test values<br />
Values extrapolated by calculation.<br />
NB All values in the table, also test values, are valid for<br />
any number of supports (calculations according to<br />
standard EN 60865-1)<br />
20x10 mm copper bars - In 520A<br />
Support CL Icw (kA Ipk (kA)<br />
distance<br />
(mm)<br />
for 1s)<br />
250 24 50<br />
300 24 50<br />
350 24 50<br />
400 22 46<br />
450 20 40<br />
500 13,5 27<br />
550 12 24<br />
• Bar part number: WO 01624 • Support part number: WO 01495<br />
All values were extrapolated through calculation from<br />
the values of the 30x10 tested system and are valid for<br />
any number of supports (calculations according to<br />
standard EN 60865-1)<br />
12x10 mm copper bars - In 360A<br />
• Bar part number: WO 01623 • Support part number: WO 01495<br />
All values were extrapolated through calculation from<br />
the values of the 30x10 tested system and are valid for<br />
any number of supports (calculations according to<br />
standard EN 60865-1)<br />
NOTE: The Icw value of 24 kA is the limit value calculated for<br />
the thermal effects of a failure lasting 1s and not for the<br />
mechanical resistance of copper. The calculation proves that<br />
such value can be maintained up to a 350 mm centre line<br />
distance between the supports.
TECHNICAL DATA<br />
30x5 mm copper bars - In 450A 15x5 mm copper bars - In 250A<br />
Support CL Icw (kA Ipk (kA)<br />
distance<br />
(mm)<br />
for 1s)<br />
250 30 63<br />
300 27 57<br />
350 25 53<br />
400 23,5 49<br />
450 22,4 47<br />
500 21 44<br />
550 20 40<br />
Support CL Icw (kA Ipk (kA)<br />
distance<br />
(mm)<br />
for 1s)<br />
250 25 53<br />
300 25 53<br />
350 25 53<br />
400 23,5 49<br />
450 22 46<br />
500 20,5 43<br />
550 19,5 39<br />
• Bar part number: WO 01622 • Support part number: WO 01495<br />
All values were extrapolated through calculation from<br />
the values of the 30x10 tested system and are valid for<br />
any number of supports (calculations according to<br />
standard EN 60865-1)<br />
25x5 mm copper bars - In 400A<br />
Support CL Icw (kA Ipk (kA)<br />
distance<br />
(mm)<br />
for 1s)<br />
200 20 40<br />
250 20 40<br />
300 20 40<br />
350 20 40<br />
400 20 40<br />
450 20 40<br />
500 20 40<br />
550 19 38<br />
• Bar part number: WO 01621 • Support part number: WO 01495<br />
All values were extrapolated through calculation from<br />
the values of the 30x10 tested system and are valid for<br />
any number of supports (calculations according to<br />
standard EN 60865-1)<br />
NOTE: The Icw value of 25 kA is the limit value calculated for<br />
the thermal effects of a failure lasting 1s and not for the<br />
mechanical resistance of copper. The calculation proves that<br />
such value can be maintained up to a 350 mm centre line<br />
distance between the supports.<br />
20x5 mm copper bars - In 320A<br />
(Tested system)<br />
• Bar part number: WO 01620 • Support part number: WO 01495<br />
Test values<br />
Values extrapolated by calculation.<br />
NB All values in the table, also test values, are valid for<br />
any number of supports (calculations according to<br />
standard EN 60865-1)<br />
NOTE: The Icw value of 20 kA is the limit value calculated for<br />
the thermal effects of a failure lasting 1s and not for the<br />
mechanical resistance of copper. The calculation proves that<br />
such value can be maintained up to a 500 mm centre line<br />
distance between the supports.<br />
Support CL Icw (kA Ipk (kA)<br />
distance<br />
(mm)<br />
for 1s)<br />
200 15 30<br />
250 15 30<br />
300 15 30<br />
350 15 30<br />
400 15 30<br />
450 15 30<br />
500 15 30<br />
550 13 26<br />
Support CL Icw (kA Ipk (kA)<br />
distance<br />
(mm)<br />
for 1s)<br />
200 12 24<br />
250 12 24<br />
300 12 24<br />
350 12 24<br />
400 12 24<br />
450 12 24<br />
500 12 24<br />
550 12 24<br />
• Bar part number: WO 01619 • Support part number: WO 01495<br />
All values were extrapolated through calculation from<br />
the values of the 20x5 tested system and are valid for<br />
any number of supports (calculations according to<br />
standard EN 60865-1)<br />
NOTE: The Icw value of 15 kA is the limit value<br />
calculated for the thermal effects of a failure lasting 1s<br />
and not for the mechanical resistance of copper. The<br />
calculation proves that such value can be maintained<br />
up to a 500 mm centre line distance between the<br />
supports.<br />
12x5 mm copper bars - In 200A<br />
• Bar part number: WO 01618 • Support part number: WO 01495<br />
All values were extrapolated through calculation from<br />
the values of the 20x5 tested system and are valid for<br />
any number of supports (calculations according to<br />
standard EN 60865-1)<br />
NOTE: The Icw value of 12 kA is the limit value<br />
calculated for the thermal effects of a failure lasting 1s<br />
and not for the mechanical resistance of copper. The<br />
calculation proves that such value can be maintained<br />
up to a 550 mm centre line distance between the<br />
supports.
Current-carrying capacity of bars<br />
The current-carrying capacity of bars change according to the surrounding<br />
ambient temperature and the temperature attained by the bars themselves, as a<br />
result of current flow. From the diagram of DIN 43671, you can calculate the<br />
variations of these three parameters in relation to the basic conditions, namely:<br />
nominal capacity (K2 =1) at 35°C ambient temperature and 65°C bar operating<br />
temperature. If the values of one or both temperatures are changed, the K2<br />
coefficient is obtained; multiplying the nominal capacity by K2, the new capacity<br />
value is obtained. Instead, if you want to know the temperature reached by the bars<br />
with a capacity other than the nominal, and at a given ambient temperature,<br />
you calculate K2 from the relation between requested capacity and nominal<br />
capacity. The crossing point of the two values on the chart corresponds to the<br />
third value.<br />
Example<br />
A 30x10 mm busbar system has a nominal capacity of 630 A (K2=1,<br />
busbar temperature 65°C).<br />
If capacity is increased to 800 A, you calculate K2=800/630=1.3.<br />
Intersecting this value with the 35° curve, a bar temperature of 85°C is obtained.<br />
Therefore, on the bars, you can mount components (bar holders, accessories, etc.)<br />
with a temperature resistance of at least 85°C.<br />
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Short-circuit withstand strength<br />
The short circuit resistance of a bar distribution system indicates its capacity to<br />
withstand dynamic stress generated during failure.<br />
The only method for verification is to test the bars (short-circuited at one end) with<br />
the application of a current in the range of tens of thousand amperes, which is<br />
supposed to be the maximum load that can be supported. If the system is not<br />
damaged, the Icw test current value is the value of comparison with the assumed Icc<br />
short circuit current at the installation point of the equipment within the electric<br />
system.<br />
For the equipment to be suitable, the value of assumed short circuit current cannot be<br />
higher than the test value. For assumed current values lower than test values, you can<br />
extrapolate a different system configuration, increasing the distance between the<br />
supports, to save on materials and have more space available on the bars.<br />
The tests carried out at CESI have allowed the creation of tables with charts, showing<br />
the centerline distances between the supports according to the assumed short circuit<br />
current at the installation point.<br />
With these tables, which are included in the technical manual supplied with the<br />
“Quadroplan” software, the system can be dimensioned correctly. In addition, the<br />
technical documentation included in the same manual, complying with the standards,<br />
shall be considered as valid for the certification and CE marking of an electric<br />
assembly manufactured with bar distribution systems submitted to tests, as<br />
prescribed by the European directive 73/23/EEC<br />
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<strong>ETA</strong> si riserva di modificare i valori indicati<br />
al fine di migliorare il prodotto.<br />
Values indicated on this catalogue may be<br />
changed by <strong>ETA</strong>, in order to improve product<br />
manufacturing.<br />
© <strong>ETA</strong> SpA March 2005