Page 111 of Circuit Breakers / Switches by Moeller Electric USA

110 technical data effective power loss moeller sk1230-1157en-na circuit-breakers disconnect switches up to 1200 a nzm up to 250a with thermomagnetic release 3 pole fixed mounted nzm1a na af na p r p in [a [w [µohm [w 1.2 1.6 2 2.4 3 5 8 12 15 18 20 25 26 30 32 33 35 40 45 50 60 63 70 80 90 100 110 125 150 160 175 200 225 250 note ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ 9.8 8.8 ­ ­ 9.1 ­ ­ 11 ­ 13.5 ­ 14 ­ 15.5 ­ 24 ­ 38 ­ 50 ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ 8180 4680 ­ ­ 3030 ­ ­ 2220 ­ 1760 ­ 1190 ­ 850 ­ 730 ­ 570 ­ 460 ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ 5.5 ­ 9.8 8.8 ­ 8.2 ­ ­ 8.2 11 10.7 13.5 12.9 ­ 12.5 15.5 17.7 24 20.7 38 ­ ­ ­ ­ ­ ­ r [µohm ­ ­ ­ ­ ­ ­ ­ ­ 8180 ­ 8180 4680 ­ 3030 ­ ­ 2220 2220 1760 1760 1190 ­ 850 850 730 730 570 570 ­ ­ ­ ­ ­ ­ s cna p [w 1.2 ­ 0.5 ­ 1.1 0.4 1 0.5 ­ 1.3 ­ ­ 2 ­ ­ 3.2 ­ 2.7 ­ 4.2 ­ 6.7 ­ 10.8 ­ 16.9 ­ ­ ­ ­ ­ ­ ­ ­ r [µohm 413000 ­ 66000 ­ 66000 9180 9180 1670 ­ 1670 ­ ­ 1050 ­ ­ 1050 ­ 562 ­ 562 ­ 562 ­ 562 ­ 562 ­ ­ ­ ­ ­ ­ ­ ­ ns1 na p [w ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ 6.7 ­ ­ ­ 16.9 ­ 26.3 ­ ­ ­ ­ ­ ­ r [µohm ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ 562 ­ ­ ­ 562 ­ 562 ­ ­ ­ ­ ­ ­ the values stated in the table apply for fixed mounted 3 pole devices which are loaded uniformly the entire resistive load is for the measured three-pole or four-pole value the total heat dissipation is the measured value for in at 50/60 hz for a 3-pole switch the heat dissipation can be calculated using the fromula p 3 xrxi² nzm up to 1200 a with electronic release 3 pole fixed mounted additional fixed mounted plug-in units nzm2nzm3n3r [µohm 275 note r [µohm 100 r [µohm 100 r [µohm 90 additional withdrawable units r [µohm 70 fixed mounted nzm4n4r [µohm 37 r [µohm 37 additional withdrawable units r [µohm 10 the values stated in the table apply for 3 pole devices which are loaded uniformly the total resistive load is the measured value for a 3 pole switch independent of in and the type of release the total resistive load for a switch in fixed or withdrawable design results from the resistive value for fixed mounting resistive value for plug-in or withdrawable design the heat dissipation can be calculated using the fromula p 3 xrxi²

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