6.2.6 Alternative Brake Resistors, T2 and T4Mains Voltage classPm Rated motor size for frequency converter typeRmin Minimum permissible brake resistor - by frequency converterRrec Recommended brake resistor resistance of Danfoss brake resistorsDuty cycle Pbr,cont.x100/PmPart number Danfoss brake resistor order numbersPbr,cont. Brake resistor average rated power.Rbr,nom The nominal (calculated) resistor value to ensure a brake power on motor shaft of 150/160/110% for 1 minuteTable 6.15 Abbreviations used in Table 6.16 to Table 6.17Mains: 200-240 V, T2FC 202 Pm Rmin Rbr,nomFlat-pack IP65Rrec per item/Pbr,cont. Duty cycle Danfoss part numberT2 [kW] [Ω] [Ω] [Ω/W] % 175UxxxxPK25 0.25 380 691.3 430/100 40 1002PK37 0.37 380 466.7 430/100 27 1002PK55 0.55 275 313.7 330/100 18 1003PK55 0.55 275 313.7 310/200 36 0984PK75 0.75 188 230.0 220/100 13 1004PK75 0.75 188 230.0 210/200 26 0987P1K1 1.1 130 152.9 150/100 9 1005P1K1 1.1 130 152.9 150/200 18 0989P1K5 1.5 81.0 110.5 100/100 7 1006P1K5 1.5 81.0 110.5 100/200 14 0991P2K2 2.2 58.5 74.1 72/200 9 0992P3K0 3 45.0 53.7 50/200 7 0993P3K7 3.7 31.5 39.9 35/200 6 0994P3K7 3.7 31.5 39.9 72/200 11 2 x 0992P5K5 5.5 22.5 28.7 40/200 7 2 x 0996Table 6.16 Mains: 200-240 V (T2), Alternative Brake ResistorsMains: 380-480 V, T4FC 202 Pm Rmin Rbr,nomFlat-pack IP65Rrec per item/Pbr,cont. Duty cycle Danfoss part numberT4 [kW] [Ω] [Ω] [Ω/W] % 175UxxxxPK75 0.75 620 910.2 830/100 13 1000P1K1 1.1 546 607.3 620/100 9 1001P1K1 1.1 546 607.3 620/200 18 0982P1K5 1.5 382 437.3 430/100 7 1002P1K5 1.5 382 437.3 430/200 14 0983P2K2 2.2 260 293.3 310/200 9 0984P3K0 3 189 212.7 210/200 7 0987P4K0 4 135 157.3 150/200 5 0989P4K0 4 135 157.3 300/200 10 2 x 0985P5K5 5.5 99.0 113.3 130/200 7 2 x 0990P7K5 7.5 72.0 82.4 80/240 6 2 x 0090Table 6.17 Mains: 380-480 V (T4), Alternative Brake ResistorsTypecode and Selection Design Guide128 Danfoss A/S © 09/2014 All rights reserved. MG20N60266
