tel: 82-32-817-4325 r esistors a nd fax: 82-32-817-4329 r esistive a pplications website: http://www.raraohm.com email: sg@raraohm.com may 13 th , 2014 mini braking high powe r resistor assemblies [preliminary] the mbva series of high power metal-clad wire wound resistors are designed for industrial high power applications & dump resistor for wind turbine.the powerful components comprise two, three or four high power resistors housed in partial steel covers at each end. these models are specially constructed for overload pulses. they ha ve a thermostat and term inal box as optional. the most common applicat ions for these models are: motor driv es, braking and snubber applications and power sources for industrial equipment. general specifications model resistor type [inside] rated power @25c [w] pulse power [kw] *resistance range[ ? ] tolerance [%] *ed5% *ed10% *ed20% *ed40% mbva 14400 2 mbv 7200 3300 52.5 26 13 6.5 0.5 ~ 100 j[5%] k[10%] mbva 19200 2 mbv 9600 4000 64 32 16 8.0 0.7 ~ 90 mbva 20000 2 mbv 10800 4500 72 36 18 9.0 0.8 ~ 80 mbva 30000 3 mbv 10800 6500 100 52 26 13 1.0 ~ 50 mbva 40000 4 mbv 10800 8500 135 68 34 17 1.5 ~ 40 * referred to a cycle duration of 120s * extended ohmic ranges are available. characteristics vaules in [ ] mean change in ? after test max.surface temperature +350 insulation resistance 20m ? minimum dielectric strength available options : ac1500v,2500v fo r 1minute,max leakage current: 2ma working voltage 600vac temperature coefficient max. 260ppm/c short time overload [5%+0.05 ? ] 5 - 10 x power rating - in 5~10seconds surface temperature increase versus power load & derating curve dimensions [mm] model l15 l22 w12 w22 h3 approx. weight [kg] mbva 14400 698 507 161.5 192 250 26 mbva 19200 798 607 161.5 192 250 30 mbva 20000 898 707 161.5 192 250 33 mbva 30000 898 707 239 269.5 250 47 mbva 40000 898 707 316.5 347 250 62
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