32:
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432:
Distribution boards split the electrical supply into separate circuits at one location. Busways, or bus ducts, are long busbars with protective covers. Rather than branching from the main supply at one location, they allow new circuits to branch off anywhere along the busway.
436:
A busbar may be either supported on insulators, or wrapped in insulation. They are protected from accidental contact either by a metal earthed enclosure or by elevation out of normal reach. Insulated bus bars are used in busways listed to UL 857 standards. Power
322:. They are generally uninsulated, and have sufficient stiffness to be supported in air by insulated pillars. These features allow sufficient cooling of the conductors, and the ability to tap in at various points without creating a new joint.
428:
induced by large currents, must be considered. To address these concerns, flexible bus bars, typically a sandwich of thin conductor layers, were developed. They require a structural frame or cabinet for their installation.
330:
The busbar's material composition and cross-sectional size determine the maximum current it can safely carry. Busbars can have a cross-sectional area of as little as 10 square millimetres (0.016 sq in), but
445:(safety grounding) busbars are typically bare and bolted directly onto any metal chassis of their enclosure. They may be enclosed in a metal housing, in the form of a bus duct or busway, segregated-phase bus, or
579:
452:
Busbars may be connected to each other and to electrical apparatus by bolting, clamping or welding. Joints between high-current bus sections often have precisely machined matching surfaces that are
393:
busbars more than about 8 millimetres (0.31 in) thickness inefficient, so hollow or flat shapes are prevalent in higher-current applications. A hollow section also has higher
568:
688:
663:
318:
for local high current power distribution. They are also used to connect high voltage equipment at electrical switchyards, and low-voltage equipment in
794:
1467:
441:
busbars may also be insulated because it is not guaranteed that the potential between power neutral and safety grounding is always zero.
258:
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193:
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1525:
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than a solid rod of equivalent current-carrying capacity, which allows a greater span between busbar supports in outdoor
1472:
787:
358:
Busbars are produced in a variety of shapes, including flat strips, solid bars and rods, and are typically composed of
604:
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75:
53:
46:
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1051:
251:
684:
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1427:
1359:
1349:
1225:
1125:
780:
660:"IEC 60050 – International Electrotechnical Vocabulary – Details for IEV number 605-02-22: "flexible busbar""
1280:
1240:
817:
469:
685:"IEC 60050 – International Electrotechnical Vocabulary – Details for IEV number 605-02-21: "rigid busbar""
1507:
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40:
20:
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A busbar must be sufficiently rigid to support its own weight, and forces imposed by mechanical
1312:
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958:
847:
126:
57:
634:
1447:
1215:
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1190:
547: – short length of conductor used to close, open or bypass part of an electronic circuit
538: – short length of conductor used to close, open or bypass part of an electronic circuit
481:
398:
332:
164:
1041:
803:
344:
526: – Low resistance electrical conductor for high current transmission and distribution
8:
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319:
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1417:
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may use metal tubes 50 millimetres (2.0 in) in diameter or more as busbars.
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520: – System that transfers data between components within a computer
476:, so special connection fittings designed for these voltages are used.
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405:
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141:
1100:
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1021:
1011:
605:"What is a Busbar & Other FAQs on Electrical Copper Busbars"
1016:
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340:
287:
284:
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352:
290:
busbars within a power distribution rack for a large building
971:
371:
16:
Strip inside switchgear for local high current distribution
569:"Copper for Busbars: Guidance for Design and Installation"
279:
306:) is a metallic strip or bar, typically housed inside
370:
as solid or hollow tubes. Some of these shapes allow
339:
use very large busbars to carry tens of thousands of
549:
Pages displaying wikidata descriptions as a fallback
540:
Pages displaying wikidata descriptions as a fallback
1538:
374:to dissipate more efficiently due to their high
788:
532: – Modular approach to electrical wiring
252:
715:Protective Relaying Theory and Applications
468:around the connections becomes a source of
795:
781:
464:(more than 300 kV) in outdoor buses,
259:
245:
738:Electrical Construction & Maintenance
76:Learn how and when to remove this message
802:
424:and ambient temperature variations, and
278:
270:
39:This article includes a list of general
734:"Ensuring a Good Bus Duct Installation"
731:
325:
1539:
712:
776:
585:from the original on 19 February 2018
420:from temperature changes induced by
25:
416:in outdoor exposures. In addition,
19:For Electrical busbar system, see
13:
1473:Renewable energy commercialization
706:
45:it lacks sufficient corresponding
14:
1558:
1547:Electric power systems components
751:
194:Electric power systems components
1521:
1520:
941:
757:
499:
487:
30:
691:from the original on 2019-01-28
666:from the original on 2019-01-28
677:
652:
627:
597:
561:
1:
1468:Renewable Energy Certificates
1428:Cost of electricity by source
1350:Arc-fault circuit interrupter
1226:High-voltage shore connection
554:
156:Electric power infrastructure
1483:Spark/Dark/Quark/Bark spread
1281:Transmission system operator
1241:Mains electricity by country
818:Automatic generation control
732:Paschal, John (2000-10-01).
635:"Power Drops / Distribution"
470:radio-frequency interference
7:
1508:List of electricity sectors
1503:Electric energy consumption
1221:High-voltage direct current
1196:Electric power transmission
1186:Electric power distribution
863:Energy return on investment
511:
296:electric power distribution
10:
1563:
1423:Carbon offsets and credits
1141:Three-phase electric power
713:Elmore, Walter A. (1994).
18:
1516:
1491:
1478:Renewable Energy Payments
1401:
1338:
1300:
1154:
1091:
1002:
967:Fossil fuel power station
957:
950:
939:
810:
412:, as well as accumulated
122:Electric power conversion
108:Electric power conversion
1261:Single-wire earth return
1201:Electrical busbar system
858:Energy demand management
530:Electrical busbar system
275:Copper busbar in a panel
21:Electrical busbar system
1392:Residual-current device
1382:Power system protection
1372:Generator interlock kit
60:more precise citations.
1176:Distributed generation
848:Electric power quality
482:electrical substations
399:electrical switchyards
333:electrical substations
291:
276:
127:HVDC converter station
1448:Fossil fuel phase-out
1216:Electricity retailing
1211:Electrical substation
1191:Electric power system
576:CopperAlliance.org.uk
345:electrochemical cells
282:
274:
165:Electric power system
804:Electricity delivery
766:at Wikimedia Commons
326:Design and placement
1413:Availability factor
1365:Sulfur hexafluoride
1246:Overhead power line
1146:Virtual power plant
1121:Induction generator
1074:Sustainable biofuel
883:Home energy storage
873:Grid energy storage
838:Droop speed control
462:extra high voltages
1287:Transmission tower
898:Nameplate capacity
615:on 30 October 2017
536:Jumper (computing)
480:110 kV busbars in
458:contact resistance
447:isolated-phase bus
337:Aluminium smelters
292:
277:
137:DC-to-DC converter
132:AC-to-AC converter
1534:
1533:
1438:Environmental tax
1318:Cascading failure
1087:
1086:
923:Utility frequency
762:Media related to
724:978-0-8247-9152-0
717:. Marcel Dekker.
609:Starlinepower.com
418:thermal expansion
349:produce aluminium
316:busway enclosures
269:
268:
208:Grid-tie inverter
117:Voltage converter
101:Power engineering
86:
85:
78:
1554:
1524:
1523:
1433:Energy subsidies
1387:Protective relay
1328:Rolling blackout
955:
954:
945:
913:Power-flow study
853:Electrical fault
797:
790:
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650:
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622:
620:
611:. Archived from
601:
595:
594:
592:
590:
584:
573:
565:
550:
541:
503:
491:
466:corona discharge
382:area ratio. The
261:
254:
247:
233:Protective relay
88:
87:
81:
74:
70:
67:
61:
56:this article by
47:inline citations
34:
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1418:Capacity factor
1406:
1404:
1397:
1377:Numerical relay
1355:Circuit breaker
1343:
1341:
1334:
1296:
1236:Load management
1206:Electrical grid
1171:Demand response
1164:
1159:
1150:
1131:Microgeneration
1083:
998:
946:
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933:Vehicle-to-grid
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709:
707:Further reading
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518:Bus (computing)
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494:flexible busbar
492:
426:magnetic forces
380:cross-sectional
328:
265:
185:Demand response
175:Electrical grid
82:
71:
65:
62:
52:Please help to
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1493:Statistics and
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1443:Feed-in tariff
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1231:Interconnector
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1183:
1181:Dynamic demand
1178:
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1111:Combined cycle
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888:Load-following
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752:External links
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1301:Failure modes
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1136:Rankine cycle
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1116:Cooling tower
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959:Non-renewable
956:
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934:
931:
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926:
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914:
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904:
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884:
881:
879:
878:Grid strength
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869:
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861:
859:
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849:
846:
844:
841:
839:
836:
834:
833:Demand factor
831:
829:
826:
824:
821:
819:
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815:
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455:
454:silver-plated
450:
448:
444:
440:
434:
430:
427:
423:
422:ohmic heating
419:
415:
414:precipitation
411:
408:and possibly
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402:
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377:
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320:battery banks
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170:Power station
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42:
37:
28:
27:
22:
1458:Net metering
1405:and policies
1323:Power outage
1292:Utility pole
1256:Pumped hydro
1162:distribution
1157:Transmission
1106:Cogeneration
908:Power factor
769:
741:. Retrieved
737:
714:
693:. Retrieved
679:
668:. Retrieved
654:
642:. Retrieved
639:busstrut.com
638:
629:
617:. Retrieved
613:the original
608:
599:
587:. Retrieved
575:
563:
506:rigid busbar
451:
435:
431:
403:
376:surface area
357:
351:from molten
329:
312:panel boards
303:
299:
293:
217:
72:
63:
44:
1453:Load factor
1308:Black start
1276:Transformer
977:Natural gas
928:Variability
903:Peak demand
893:Merit order
823:Backfeeding
545:Wire bridge
410:earthquakes
384:skin effect
66:August 2014
58:introducing
1495:production
1340:Protective
1271:Super grid
1266:Smart grid
1093:Generation
1027:Geothermal
918:Repowering
743:2009-04-06
695:2019-01-27
670:2019-01-27
644:13 January
619:30 October
589:30 October
555:References
474:power loss
456:to reduce
308:switchgear
41:references
1403:Economics
1126:Micro CHP
1004:Renewable
987:Petroleum
982:Oil shale
868:Grid code
828:Base load
406:vibration
395:stiffness
368:aluminium
142:Rectifier
1541:Category
1526:Category
1313:Brownout
1101:AC power
811:Concepts
689:Archived
664:Archived
580:Archived
524:Bus duct
512:See also
443:Earthing
388:50–60 Hz
228:Recloser
223:Bus duct
147:Inverter
93:a series
91:Part of
1342:devices
1052:Thermal
1047:Osmotic
1042:Current
1022:Biomass
1012:Biofuel
994:Nuclear
951:Sources
764:Busbars
439:neutral
343:to the
341:amperes
304:bus bar
54:improve
1037:Marine
1017:Biogas
721:
460:. At
386:makes
360:copper
314:, and
302:(also
300:busbar
288:copper
285:ampere
218:Busbar
43:, but
1394:(GFI)
1283:(TSO)
1069:Solar
1057:Tidal
1032:Hydro
583:(PDF)
572:(PDF)
364:brass
353:salts
347:that
283:1500
1160:and
1079:Wind
1062:Wave
972:Coal
719:ISBN
646:2024
621:2017
591:2017
472:and
372:heat
298:, a
294:In
401:.
378:to
366:or
1543::
736:.
687:.
662:.
637:.
607:.
578:.
574:.
449:.
391:AC
362:,
355:.
310:,
95:on
796:e
789:t
782:v
746:.
727:.
698:.
673:.
648:.
623:.
593:.
260:e
253:t
246:v
79:)
73:(
68:)
64:(
50:.
23:.
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