Vacon CX Manual

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Page 6 (14) VaconVacon Plc Phone: +358-201-2121 Fax: +358-201-212 205Service: +358-40-8371 150 E-mail:vacon@vacon.comhttp://www.vacon.comBrake choppers and resistorsVacon CX_4 and DC-current Brake resistorCX_5 rated power Imax (80°C) CX_4 CX_5[kW] [A] [Ω] [Ω]M3: 0,75 - 3,0 12,0 63,0 75,9M4B: 4,0 - 7,5 12,0 63,0 75,9M4B: 11 22 30,6 38,4M4: 2,2 - 5,5 25 30,2 36,4M5B:15-18,5 45 16,7 20,2M5B:22 65 11,6 14M5: 7,5 - 15 75 10,1 12,2M6: 18,5 - 45 150 5,0 6,1M7: 55 - 90 300 2,5 3,0M8: 110 - 160 600 1,3 1,5M9: 200 - 250 900 0,84 1,0M10: 315 - 400 1200 0,63 0,762.3 EnvironmentSurface temperature of the resistor box:<80°CMaximum ambient temperature: 30°CProtection class: IP20NOTE: When you mount the resistor pack-age, note the high surface temperature.The mounting surface must be non-flam-mable and there must be sufficient freespace around the box. Ensure sufficientventilation of the area.2.4 Dimensioning of brakeresistorsYou can connect an external brake resist-ance to Vacon CX frequency convertersequipped with a brake chopper. The mini-mum resistance values as well as themaximum current allowed per power rat-ing are shown in the table below. Thesevalues must be kept at all times. The re-Table 2.4-1 Vacon CX_4 and CX_5brake chopper ratingssistor has to be protected also againstovertemperature. The overtemperatureprotection has to be connected as shownin Chapter 4.2. As for frames M11, M12and M13, read Chapter 4, Connections.Vacon CX_6 DC-current Brake resistorrated power Imax (80°C)[kW][A] [Ω]M5:7,5 - 22 75,0 16,8M6:30 - 75 150 8,4M8:90 - 132 300 4,2M9: 160 - 200 450 2,8M10:250 - 315 600 2,1Table 2.4-2 Vacon CX_6 brakechopper ratings.DC-current, Imax(80 dgr C) [A]Brake resistorCX2 Ω15 3015 3022 2025 1845 1065 775 6150 3300 1.5600 0.75M4: 1.5 - 3.0M5B: 7.5 - 11.0M5B: 15Vacon CX_2 ratedpower (kW)M3: 0.55 - 1.5M4B: 2.2 - 3.0M4B: 4.0 - 5.5M6: 11.0 - 22.0M5: 4.0 - 7.5M7: 30.0 - 45.0M8: 55-90Table 2.4-3 Vacon CX_2 brake chopperratings