NB-H Miniature Circuit Breaker. General. Function protection of circuits against short-circuit currents, protection of circuits against overload currents, switch, isolation, NB-H circuit-breakers are used in domestic installation, as well as in commercial and industry electrical distribution systems. NB-H also can be used in DC application:vdc/pole.. Selection Technical data of the network at the point considered: the earthing systems (TNS, TNC), short-circuit current at the circuit-breaker installation point, which must always be less than the breaking capacity of this device, Network normal voltage. Tripping curves: B curve (-) protection for people and big length cables in TN and IT systems. C curve (-) protection for resistive and inductive loads with low inrush current. D curve(-) protection for circuits which supply loads with high inrush current at the circuit closing (LV/LV transformers, breakdown lamps).. Technical data. curves t(s) 000 IEC/EN 0898- AC type B curve 00 h 00 00 0 0 0 0. 0. 0.0 0.0 0.0 0.00 0.00 0.00 7 70 0 0 I/ A A INTERTEK 0 >> Empower the World
t(s) 000 00 h 00 00 0 0 0 0. 0. 0.0 0.0 0.0 0.00 0.00 IEC/EN 0898- AC type C curve 0.00 7 70 0 0 I/ t(s) 000 00 h 00 00 0 0 0 0. 0. 0.0 0.0 0.0 0.00 IEC/EN 0898- AC type D curve 0.00 0.00 7 70 0 0 I/. Standard IEC/EN 0898- IEC/EN 097- Rated current A,,,,,,,,,,,, Poles P, P+N, P, P, P+N, P P, P, P, P Rated voltage Ue V /0~/ sulation voltage Ui V 0 Rated frequency Rated breaking capacity A /0Hz 000 Electrical features Energy limiting class Rated impulse withstand voltage(./) Uimp V 000 Dielectric test voltage at ind. Freq. for min Pollution degree kv.890 Rated current Average power loss per pole (W) Power loss per pole,,,,,,,,,,.,, Thermo-magnetic release characteristic B, C, D Electrical life, 000 Mechanical life, 000 Contact position indicator ON/OFF indicate RED/GREEN Mechanical features Protection degree Reference temperature for setting of thermal element IP Operating Temperature -...+70(Special application please refer to P for temperature compensation correction) Terminal connection type Cable/U-type busbar/pin-type busbar Terminal size top/bottom for cable mm AWG (flexible cable ),( rigid cable) 8- stallation Terminal size top/bottom for busbar mm AWG 8-8 Tightening torque N m -Ibs.. Mounting On DIN rail EN 07 (mm) by means of fast clip device Bus-bar Connection Both top and bottom Combination with accessories Auxiliary contact Shunt release Under voltage release Alarm contant Empower the World >> 0
. Selectivity Power supply side: RT-00 (fuse) Load side: NB-, NB-H. 0.7 0.. 0.9 0.7 >.8..9.. >..8...8.. >.....7 80 >....9.7. 0 >....8.. >.... >.. Load side: NB-, NB-H 0.9 0.9 0. 0. Power supply side: NM8-0S/H/R 0. 0. 80 0. 0. 0. 0. 0. 0. 0. Backup protection Power supply side: RT series 80 0 Load side: NB-, NB-H ~ 8~ Load side: NB-, NB-H ~ ~ ~ ~0 8 Power supply side: NM8 NM8-S NM8-H NM8-R NM8-S NM8-H NM8-R 8 0 >> Empower the World
. Temperature derating The maximum permissible current in a circuit breaker depends on the ambient temperature where the circuit breaker is placed. Ambient temperature is the temperature inside the enclosure or switchboard in which the circuit breakers are installed. The reference temperature is Ambient temperature Rated current - - - - 0 0 70..0.90. 7.80....00.. 7.00...78.0 7..70.8.0.00.8.....9.9 7.8..00.00..00.00.00.9.8.7.7 7..00 9..00.00 8.7 8.00 0..8...8. 8..00 8.7 7.. 8.00.....0. 7.7. 7.7..80.00.0.08....0.9...9..00.00.00.00.00.00.00.00.00.00.00.00.00 0.9.9.88.8.7 9.0. 9..00.7 8. 8.00 0.9.8.79.7. 9..88 8.0. 9.7 7.. 8.7...8 8.90. 7.80. 8..0.00..9..98 8...8.00.88.. 8.79 8.90 80.0 7.8 7.7 7.78.00 0.8 8.90..9 When several simultaneously operating circuit breakers are mounted side by side in a small enclosure, the temperature rise inside the enclosure causes a reduction in current rating. You must then assign the rating (already derated if necessary according to ambient temperatuer) a downrating factor of.. Overall and mounting dimensions (mm) ±0..± 8 0 -. 9.±0. 78 0 -. 8 0-0. 0-0. 0 -. 7 0 -. P P+N, P P P+N, P Empower the World >> 0
. Ordering information Order code Description and sepcification Order code Description and sepcification 7978 NB-H P C ka 798 NB-H P B ka 7978 NB-H P C ka 7987 NB-H P B ka 7978 NB-H P C ka 7988 NB-H P B ka 7978 NB-H P C ka 7989 NB-H P B ka 7978 NB-H P C ka 798 NB-H P B ka 7978 NB-H P C ka 798 NB-H P B ka 79787 NB-H P C ka 798 NB-H P B ka 79788 NB-H P C ka 798 NB-H P C ka 79789 NB-H P C ka 798 NB-H P C ka 79790 NB-H P C ka 798 NB-H P C ka 7979 NB-H P C ka 798 NB-H P C ka 8 NB-H P C ka 7987 NB-H P C ka 7979 NB-H P C ka 7988 NB-H P C ka 7979 NB-H P C ka 7989 NB-H P C ka 7979 NB-H P C ka 798 NB-H P C ka 7979 NB-H P D ka 798 NB-H P C ka 7979 NB-H P D ka 798 NB-H P C ka 79797 NB-H P D ka 798 NB-H P C ka 79798 NB-H P D ka 798 NB-H P C ka 79799 NB-H P D ka 798 NB-H P C ka 79800 NB-H P D ka 798 NB-H P C ka 7980 NB-H P D ka 7987 NB-H P D ka 7980 NB-H P D ka 7988 NB-H P D ka 7980 NB-H P D ka 7989 NB-H P D ka 7980 NB-H P D ka 798 NB-H P D ka 7980 NB-H P D ka 798 NB-H P D ka 7980 NB-H P D ka 798 NB-H P D ka 79807 NB-H P D ka 798 NB-H P D ka 79808 NB-H P D ka 798 NB-H P D ka 8 NB-H P D8 ka 798 NB-H P D ka 89 NB-H P+N C ka 798 NB-H P D ka 870 NB-H P+N C ka 7987 NB-H P D ka 87 NB-H P+N C ka 7988 NB-H P D ka 87 NB-H P+N C ka 7989 NB-H P D ka 87 NB-H P+N C ka 798 NB-H P D ka 87 NB-H P+N C ka 87 NB-H P D8 ka 87 NB-H P+N C ka 798 NB-H P B ka 87 NB-H P+N C ka 798 NB-H P B ka 88 NB-H P+N C ka 798 NB-H P B ka 877 NB-H P+N C ka 798 NB-H P B ka 79809 NB-H P B ka 798 NB-H P B ka 798 NB-H P B ka 798 NB-H P B ka 798 NB-H P B ka 7987 NB-H P B ka 798 NB-H P B ka 7988 NB-H P B ka 798 NB-H P B ka 7989 NB-H P B ka 798 NB-H P B ka 7980 NB-H P B ka 798 NB-H P B ka 798 NB-H P B ka 0 >> Empower the World
Order code Description and sepcification Order code Description and sepcification 798 NB-H P B ka 79899 NB-H P B ka 798 NB-H P B ka 79900 NB-H P B ka 798 NB-H P B ka 7990 NB-H P B ka 798 NB-H P C ka 7990 NB-H P B ka 798 NB-H P C ka 7990 NB-H P B ka 7987 NB-H P C ka 7990 NB-H P B ka 7988 NB-H P C ka 7990 NB-H P B ka 7989 NB-H P C ka 7990 NB-H P B ka 79870 NB-H P C ka 79907 NB-H P C ka 7987 NB-H P C ka 79908 NB-H P C ka 7987 NB-H P C ka 79909 NB-H P C ka 7987 NB-H P C ka 799 NB-H P C ka 7987 NB-H P C ka 799 NB-H P C ka 7987 NB-H P C ka 799 NB-H P C ka 7987 NB-H P C ka 799 NB-H P C ka 79877 NB-H P C ka 799 NB-H P C ka 79878 NB-H P C ka 799 NB-H P C ka 79879 NB-H P D ka 799 NB-H P C ka 79880 NB-H P D ka 7997 NB-H P C ka 7988 NB-H P D ka 7998 NB-H P C ka 7988 NB-H P D ka 7999 NB-H P C ka 7988 NB-H P D ka 799 NB-H P C ka 7988 NB-H P D ka 799 NB-H P D ka 7988 NB-H P D ka 799 NB-H P D ka 7988 NB-H P D ka 799 NB-H P D ka 79887 NB-H P D ka 799 NB-H P D ka 79888 NB-H P D ka 799 NB-H P D ka 79889 NB-H P D ka 799 NB-H P D ka 79890 NB-H P D ka 7997 NB-H P D ka 7989 NB-H P D ka 7998 NB-H P D ka 7989 NB-H P D ka 7999 NB-H P D ka 878 NB-H P+N C ka 799 NB-H P D ka 879 NB-H P+N C ka 799 NB-H P D ka 880 NB-H P+N C ka 799 NB-H P D ka 88 NB-H P+N C ka 799 NB-H P D ka 88 NB-H P+N C ka 799 NB-H P D ka 88 NB-H P+N C ka 88 NB-H P+N C ka 88 NB-H P+N C ka 888 NB-H P+N C ka 88 NB-H P+N C ka 7989 NB-H P B ka 7989 NB-H P B ka 7989 NB-H P B ka 7989 NB-H P B ka 79897 NB-H P B ka 79898 NB-H P B ka Empower the World >> 0