Vacon NX User Manual

12
vacon • 208 Brake chopper unit (NXB)
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
12.6.2 Braking power and resistance, mains voltage 380–500 Vac/600–800
Vdc
NOTE! The braking powers indicated in Table 103 can only be achieved with minimum resistance.
Table 102. Voltage levels
Voltage
Default +18% DC-link voltage level for braking
Vac 380 400 420 440 460 480 500
Vdc 513 540 567 594 621 648 675
U
br
+18%
605 637 669 701 733 765 797
Table 103. Maximum braking power
Chas-sis NXB unit
Thermal
current [Ith]
Max braking power at DC-link voltages [kW]
605 637 669 701 733 765 797
Ch3 NXB 0031_5 31 37.5 39.5 41.5 43.5 45.4 47.4 49.4
Ch3 NXB 0061_5 61 73.9 77.7 81.6 85.5 89.4 93.3 97.2
Ch4 NXB 0087_5 87 105.3 110.9 116.4 122.0 127.5 133.0 138.6
Ch4 NXB 0105_5 105 127.1 133.8 140.5 147.2 153.9 160.6 167.3
Ch4 NXB 0140_5 140 169.5 178.4 187.3 196.3 205.2 214.1 223.0
Ch5 NXB 0168_5 168 203.4 214.1 224.8 235.5 246.2 256.9 267.6
Ch5 NXB 0205_5 205 248.2 261.3 274.3 287.4 300.4 313.5 326.6
Ch5 NXB 0261_5 261 316.0 332.6 349.2 365.9 382.5 399.1 415.8
Ch61 NXB 0300_5 300 363.2 382.3 401.4 420.6 439.7 458.8 477.9
Ch61 NXB 0385_5 385 466.1 490.6 515.2 539.7 564.2 588.8 613.3
Ch62 NXB 0460_5 460 556.9 586.2 615.5 644.8 674.2 703.5 732.8
Ch62 NXB 0520_5 520 629.6 662.7 695.8 729.0 762.1 795.2 828.4
Ch62 NXB 0590_5 590 714.3 751.9 789.5 827.1 864.7 902.3 939.9
Ch62 NXB 0650_5 650 786.9 828.4 869.8 911.2 952.6 994.0 1035.5
Ch62 NXB 0730_5 730 883.8 930.3 976.8 1023.3 1069.9 1116.4 1162.9
Table 104. Minimum resistance
Chassis NXB unit
Thermal
current [Ith]
Minimum resistance at DC-link voltages [ohm]
605 637 669 701 733 765 797
Ch3 NXB 0031_5 31 19.5 20.6 21.6 22.6 23.6 24.7 25.7
Ch3 NXB 0061_5 61 9.9 10.4 11.0 11.5 12.0 12.5 13.1
Ch4 NXB 0087_5 87 7.0 7.3 7.7 8.1 8.4 8.8 9.2
Ch4 NXB 0105_5 105 5.8 6.1 6.4 6.7 7.0 7.3 7.6
Ch4 NXB 0140_5 140 4.3 4.6 4.8 5.0 5.2 5.5 5.7
Ch5 NXB 0168_5 168 3.6 3.8 4.0 4.2 4.4 4.6 4.7
Ch5 NXB 0205_5 205 3.0 3.1 3.3 3.4 3.6 3.7 3.9

Vacon NX Specifications

General

Product Type	AC Drive
Control Method	Scalar Control
Enclosure	IP00, IP21
Communication	Ethernet
Safety	STO (Safe Torque Off)
Protection Features	Overcurrent, Overvoltage, Undervoltage, Overtemperature, Short Circuit
Ambient Temperature Range	-10°C to +50°C (with derating above +40°C)
Cooling Method	Air-cooled, Liquid-cooled