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Functions and characteristics Accessories and auxiliaries Fixed circuit breakers are designed for standard front connection using bars or cables with lugs. Cable connectors are available for bare cables. Rear connection is also possible. Front connection DB112168.eps DB112169.eps Connection of fixed devices Bars or cables with lugs Standard terminals Compact NSX100 to 630 come with terminals comprising snap-in nuts with screws: b Compact NSX100: M6 nuts and screws. Compact NSX160/250: M8 nuts and screws b Compact NSX400/630: M10 nuts and screws. These terminals may be used for: b direct connection of insulated bars or cables with lugs b terminal extensions offering a wide range of connection possibilities. Interphase barriers or terminal shields are recommended. They are mandatory for certain connection accessories (in which case the interphase barriers are provided). Bars :KHQWKHVZLWFKERDUGFRQ¿JXUDWLRQKDVQRWEHHQWHVWHGLQVXODWHGEDUVDUH mandatory. DB112170.eps Insulated bar. Maximum size of bars Small lug for copper cables. Compact NSX circuit breaker Without spreaders pitch (mm) maximum bar size (mm) With spreaders pitch (mm) maximum bar size (mm) 100/160/250 35 20 x 2 45 32 x 2 400/630 45 32 x 6 52.5 40 x 6 DB112171.eps Crimp lugs There are two models, for aluminium and copper cables. It is necessary to use narrow lugs, compatible with device connections. They must be used with interphase barriers or long terminal shields. The lugs are supplied with interphase barriers and may be used for the types of cables listed below. Cable sizes for connection using lugs DB112174.eps Right-angle terminal extensions. DB112176.eps DB112175.eps Straight terminal extensions. Double-L terminal extensions. Spreaders. DB112180.eps DB112179.eps DB118544.eps Edgewise terminal extensions. 45° terminal extensions. DB112177.eps DB112172.eps DB112173.eps Small lug for Al cables. Mounting at the back of a switchboard. A-74 Mounting behind the front panel with a raiser. Compact NSX circuit breaker Copper cables size (mm²) crimping Aluminium cables size (mm²) crimping 100/160/250 400/630 120, 150, 185 240, 300 hexagonal barrels or punching 120, 150, 185 240, 300 hexagonal barrels Terminal extensions Extensions with anti-rotation ribs can be attached to the standard terminals to provide numerous connection possibilities in little space: b straight terminal extensions b right-angle terminal extensions b edgewise terminal extensions b double-L extensions b 45° extensions. Spreaders Spreaders may be used to increase the pitch: b NSX100 to 250: the 35 mm pitch can be increased to 45 mm b NSX400/630: the 45 mm pitch can be increased to 52 or 70 mm. Bars, cable lugs or cable connectors can be attached to the ends. One-piece spreader for NSX100 to 250 Connection of large cables may require an increase in the distance between the device terminals. The one-piece spreader is the means to: b increase the 35 mm pitch of the NSX100 to 250 circuit-breaker terminals to the 45 mm pitch of a NSX400/630 device b use all the connection and insulation accessories available for the next largest frame size (lugs, connectors, spreaders, right-angle and edgewise terminal extensions, terminal shields and interphase barriers). It may also be used for Compact INS switch-disconnectors. Equipped with a single-piece spreader, Compact NSX devices can be mounted: b at the back of a switchboard b behind the front panel with a raiser. The one-piece spreader is also the means to: b align devices with different frame sizes in the switchboard b use the same mounting plate, whatever the device. Pitch (mm) depending on the type of spreader Compact NSX circuit breaker Without spreaders With spreaders With one-piece spreader NSX100 to 250 35 45 45 NSX100 to 630 45 52.5 or 70 - Functions and characteristics Accessories and auxiliaries Connection is identical for both withdrawable and SOXJLQYHUVLRQV7KHVDPHDFFHVVRULHVDVIRU¿[HG devices may be used. Bars or cables with lugs Front connection. DB111339.eps DB111338.eps The plug-in base is equipped with terminals which, depending on their orientation, serve for front and rear connection. For rear connection of a base mounted on a backplate, the terminals must be replaced by insulated, long right-angle terminal extensions. For Compact NSX630 devices, connection most often requires the 52.5 or 70 mm pitch spreaders. DB111337.eps DB111345.eps DB111346.eps Four positions. Connection of withdrawable and plug-in devices Front connection with spreaders. Rear connection of a base mounted on a backplate. Connection accessories $OODFFHVVRULHVIRU¿[HGGHYLFHVEDUVOXJVWHUPLQDOH[WHQVLRQVDQGVSUHDGHUVPD\ be used with the plug-in base (see page A-74 and page A-75). Bare cables DB111341.eps DB111340.eps All terminals may be equipped with bare-cable connectors. See the "Connection of ¿[HGGHYLFHVVHFWLRQ With a 100 to 250 A base. With a 400/630 A base. DB111344.eps Adapter for plug-in base DB111343.eps DB111342.eps The adapter is a plastic component for the 100 to 250 base and the 400/630 base WKDWHQDEOHVXVHRIDOOWKHFRQQHFWLRQDFFHVVRULHVRIWKH¿[HGGHYLFH It is required for interphase barriers and the long and short terminal shields. Adapter for 100 to 250 A - 3P base. Connection with bars or cables with lugs. A-76 Adapter for 400/630 A - 4P base. Connection with spreaders and interphase barriers. Installation in switchboards Installation recommendations Safety clearances and minimum distances General rules When installing a circuit breaker, minimum distances (safety clearances) must be maintained between the device and panels, bars and other protection devices installed nearby. These distances, which depend on the ultimate breaking capacity, DUHGH¿QHGE\WHVWVFDUULHGRXWLQDFFRUGDQFHZLWKVWDQGDUG,(& If installation conformity is not checked by type tests, it is also necessary to: b use insulated bars for circuit-breaker connections b segregate the busbars using insulating screens. For Compact NSX100 to 630 devices, terminal shields and interphase barriers are recommended and may be mandatory depending on the operating voltage of the GHYLFHDQGW\SHRILQVWDOODWLRQ¿[HGZLWKGUDZDEOHHWF Power connections The table below indicates the rules to be respected for Compact NSX100 to 630 devices to ensure insulation of live parts for the various types of connection. b ¿[HGGHYLFHVZLWKIURQWFRQQHFWLRQ)&RUUHDUFRQQHFWLRQ5& b plug-in or withdrawable devices. Connection accessories such as crimp lugs, bare-cable connectors, terminal extensions (straight, right-angle, double-L and 45°) and spreaders are supplied with interphase barriers. Long terminal shields provide a degree of protection of IP40 (ingress) and IK07 (mechanical impact). Compact NSX100 to 630: rules to be respected to ensure insulation of live parts Through panel operating voltage Short terminal shields Short terminal shields Short terminal shields Bare cables + connectors DB115061 Possible Possible Possible Recommended Recommended Mandatory No Mandatory (supplied) Possible (instead of ph. barriers) Recommended Recommended Mandatory Possible for cable connectors NSX100 to 250 Possible for cable connectors NSX100 to 250 Mandatory No Mandatory (1) (supplied) Possible for cable connectors NSX100 to 250 Recommended Recommended Possible (1) (instead of ph. barriers) No No Mandatory (use of short Mandatory terminal shield possible) Mandatory Mandatory No No Mandatory Mandatory Mandatory Mandatory No No Mandatory Mandatory Mandatory Mandatory Insulated bars Extension terminals Cables + crimp lugs Bare cables + connectors (1)/RQJWHUPLQDOVKLHOGVPDQGDWRU\LIWKHGHYLFHLV¿[HGWKURXJKWKHGRRUZKDWHYHUWKHYROWDJH B-4 DB115061 type of conductor Insulated bars Extension terminals Cables + crimp lugs u 500 V Long terminal shields DB115060 With: < 500 V Interphase barriers DB115059 Possible, recommended or mandatory accessories: No insulating accessory DB115061 On backplate DB115058.eps Plug-in or withdrawable DB115057.eps Fixed, rear connection DB115056.eps Fixed, front connection DB115055.eps Type of connection