1 Selection: - Automation1725 S. Johnson Berlin, WI 53146-1240(877) 268-3700 Fax: (877) 268-9700 this information is provided by:Referenceindexes, Sales officesCONTROLSPROTECTIONCONNECTIONAUTOM ATION195414 Reference, indexes, Sales officesTABLE OF CONTENTSTABLE OF CONTENTSNA14 TOC1T001222 REFERENCE, TERMINAL BLOCKSC haracteristics, rated .. 1957 Connection technologies .. 1958-1960 ADO insulation displacement ..1959 Other connection technologies .. 1960 Screw clamp .. 1958 Spring connection .. 1959 History .. 1955 Materials .. 1962 Protection: ratings,description, and degree .. 1963-1964 Terminology .. 1956 Tests, environmental .. 1965 Types of terminal blocks .. 1961 TABLESC ontactors, NEMA size to IEC type .. 1969 Current capacities, insulated conductors .. 1968 Kilowatt (kW) toHorsepower (HP) conversion .. 1969 Metric equivalents.
2 1967 Common measures .. 1967 Wire cross section .. 1967 Temperature conversion, C/ F .. 1966 Terminations, multiple wire .. 1967 INDEXESI ndex by:Part number & type .. from page 1970 Sales OFFICESD ivision locations ..2005 Worldwide locations ..2006-2008 You may also want to find yourproduct by using our dynamicon-line search by part numberor by type us at TERMINAL BLOCK HISTORYI. TERMINAL BLOCK HISTORYSCREW ON WOODEN PLATEBRASS CONTACT ON BAKELITEINSULATING BODY1st TERMINAL BLOCK WITHPOLYAMIDE BODYRILSAN : THIN INSULATING BODY( mm) ON Entrelec RAILVDE CERTIFIEDENTRELEC RANGEENTRELEC POLYAMIDE MULTIRAILRANGEADO : INSULATION DISPLACEMENT RANGEFAST AND RELIABLE CONNECTIONSPRING CONNECTION RANGEFRONT CONNECTIONENTRELEC RANGE OF TERMINALBLOCKS FOR INTERFACING TO PLCsAND According to IEC 60947-1 Terminal block: insulating partcarrying one or more mutually insulatedterminal assemblies and intended tobe mounted on a support.
3 Terminal: conductive part of a deviceprovided for electrical connection toexternal circuits. Screw-type terminal: terminalintended for the connection anddisconnection of conductors or for theinterconnection of two or moreconductors, the connection beingmade, directly or indirectly, by meansof screws or nuts of any kind. Screwless-type terminal: terminalintended for the connection anddisconnection of conductors or for theinterconnection of two or moreconductors, the connection beingmade, directly or indirectly, by meansof springs, wedges, eccentrics orcones, etc. Clamping unit: part(s) of a terminalnecessary for the mechanical clampingand the electrical connection of theconductor(s). Protective conductor (symbol PE):conductor required for protectionagainst electric shock for electricallyconnecting any of the following parts :- Exposed conductive parts- Extraneous conductive parts- Power source grounding terminal- Ground electrode- Grounded point of thesource or artificial neutral Neutral conductor (symbol N):conductor connected to the neutralpoint of a system and capable ofcontributing to the transmission ofelectrical energy.
4 Isolation (isolating function):function intended to cut off the supplyfrom all or a discrete section of theinstallation by separating the installationor section from every source ofelectrical energy for reasons of safety. Clearance: distance between twoconductive parts, along a stringstretched the shortest way betweenthese conductive parts. Creepage distance: shortest distancealong the surface of an insulatingmaterial between two conductive According to NFC 93-461 Spacing: rated side dimension (mm)of a terminal block. When a separatoris needed, the spacing is the totalrated dimension. Socket: conductive part of aterminal block designed for anadapted plug, and ensuring anelectrical contact with this plug. Separator: removable section madeof insulating material to be insertedbetween two terminal blocks to ensurethe side insulation or to lengthen thecreepage distances between the twoconductive parts.
5 End section: removable plate madeof insulating material to be placed ateach end of an assembly or a groupof terminal blocks. It can be used forcover mounting. Cover: removable part made ofinsulating material, with suitablelength, designed to be mounted overa group of terminal blocks placedside by side, to ensure protectionagainst direct touch. If necessary, itcan also be used as a marker holder. End stop: side tightening adapteddevice, helps to reinforce themounting of a terminal blockassembly on the CHARACTERISTICS OF TERMINAL BLOCKSR ated operational voltageVe (according to 60947-1) The rated operational voltage ofequipment is a value of voltage, which,combined with a rated operational current,determines the application of theequipment and to which the relevant testsand the utilization categories are referred.
6 The rated operational voltage for Entrelecproducts is equal to the rated insulation voltage Vi(according to 60947-1) The rated insulation voltage of equipmentis the value of voltage towhich dielectric tests and creepagedistances are referred. To ensure anoptimal rated insulation voltage, thecreepage distances of Entrelecterminal blocks are calculatedaccording to the requirements of IEC60664 and IEC 60947-1 Tests are carried out accordingto IEC 60947-1 impulse withstandvoltage Vimp (according to IEC 60947-1) The peak value of an impulse voltageof prescribed form and polarity which theequipment is capable ofwithstanding without failure underspecified conditions of test and to whichthe values of the clearances arereferred.
7 Clearances of Entrelec terminal blocksare designed in accordance with therequirements of IEC 60664 and 60947-1 , and tested according to IEC60947-1 operational currentIe (according to 60947-1) A rated operational current ofequipment is stated by the manufacturerand takes into account the ratedoperational voltage, the rated frequency,the rated duty, the utilization categoryand the type of protective enclosure, ifappropriate. Entrelec terminal blocks are designedfor a temperature rise per therequirements of IEC 60947-7-1 ,when used at the rated connecting capacity(according to IEC60947-7-1) The rated connecting capacity of aterminal block is the range and/ornumber of rated cross-sections forwhich the terminal block is designed. The connecting capacities of Entrelecterminal blocks are optimized for theirfield of conditions:pollution degree (accordingto IEC 60947-1)Section of IEC 60947-1 definesfour pollution degrees : Pollution degree 1:No pollution or only dry, non-conductivepollution exists:Pollution degree 2:Normally, only non-conductive pollutionexists.
8 Occasionally, however, atemporary conductivity caused bycondensation may be degree 3:Conductive pollution exists, or dry,non-conductive pollution exists, whichbecomes conductive due degree 4:The pollution generates persistentconductivity caused, for instance, byconductive dust or by rain or snow. Entrelec terminal blocks are designedfor pollution degree 3, according toIEC 60947-1 standard (clearances andcreepage distances refer to the pollutiondegree).Short-time withstandcurrent (according to IEC 60947-7-1) A specified value of current whicha terminal block shall be able towithstand during a specified short-timeunder prescribed conditions of use andbehavior. The values of the short-time withstandcurrent of Entrelec terminal blockscorrespond to 120 A/mm of their ratedcross sections, as specified inIEC 60947-7-1 standard with these requirements isdemonstrated by tests according to of IEC 60947-7-1 cross-section(according to IEC60947-7-1) The rated cross-section of a terminalblock is a value of connectableconductor cross-section, stated by themanufacturer, and to which certainthermal, mechanical and electricalrequirements are referred.
9 Rated cross-sections of Entrelecterminal blocks are tested accordingto IEC 60947-1 CHARACTERISTICS OF TERMINAL BLOCKS1958T99004000801IV. CONNECTION TECHNOLOGIESIV. CONNECTION TECHNOLOGIESSCREW CLAMP CONNECTIONSTANDARDThe screw-clamp technology is a connection solutionthat has been used for decades. It remains the mostcommonly used connection of the technologyThe screw-clamp assembly, made of tempered steel, performs at very high contact pressure. The wire to beconnected is tightened against a copper alloy connecting characteristics Side connection High contact pressure Wide range of wire sizes Protection against vibration, wire compression, and thermal variations Easy connection of flexible wires: no ferrule needed Excellent pull-out resistance and excellent electrical contact due to slots on the screw clamp and thebar entering the cable core Tab under the clamp prevents accidental insertion of the wire under the screw clamp when in highpositionHIGH CORROSION RESISTANCE (NC type) this range of terminal blocks is similar to standard screw clamp blocks for electrical and mechanicalcharacteristics.
10 However, this range varies from the standard one by offering a very high corrosion resistancedue to the metallic materials selected for their excellent corrosion resistance (see section "Materials") andbecause it is characteristic Resistance to saline mist: 1,000 hours without deterioration (minimum 168 hours according to IEC 60068-62standard).SAFETY (RS type) this range of terminal blocks is similar to standard screw clamp blocks for electrical and mechanicalcharacteristics. However, it offers a reinforced connection of the technologyBlock equipped with a spring, which ensures continuous pressure on the wire clamp, preventing any accidentalcontact loss. Moreover, the wire clamp is combined with a specific connecting bar that is designed to receivespecial bent lugs, eliminating any risk of wire connection mode, particularly adapted to British market requirements, is in accordance with BritishStandard ESI CONNECTIONThe spring connection system is a relatively recenttechnology, used more and more in of the technologyThis system is similar to the screw-clamp technology where two separate parts ensure the mechanical (screw/spring clamp) and electrical (bar) functions.