Vacon NX User Manual

12
vacon • 204 Brake chopper unit (NXB)
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
12.5 BCU power ratings
12.5.1 VACON
®
NXB; DC voltage 460–800 V
For dimensions of BCU units, see Table 14.
NOTE! The rated currents in given ambient (+50 °C) and coolant (+30°) temperatures are achieved
only when the switching frequency is equal to or less than the factory default.
NOTE! Braking power: P
brake
= 2*U
brake
2
/ R
brake
NOTE! Max input DC current: I
in_max
= P
brake_max
/ U
brake
Table 98. Power ratings of VACON
®
NXB, supply voltage 460–800 Vdc
Braking voltage 460-800 VDC
NXB type
Loadability Braking capacity
Chassis
BCU rated
cont. braking
current, I
br
[A]
Rated min
resistance
at 800 VDC
[
Ω]
Rated min
resistance
at 600 VDC
[Ω]
Rated
max input
current
[Adc]
Rated cont.
braking
power
2*R at
800 VDC
[kW]
*
*. 800 VDC equals U
brake
at 500 VAC
Rated cont.
braking
power
2*R at
600 VDC
[kW]
**
**. 600 VDC equals U
brake
at 380 VAC
NXB_0031 5 2*31 25.7 19.5 62 49 37 CH3
NXB_0061 5 2*61 13.1 9.9 122 97 73 CH3
NXB_0087 5 2*87 9.2 7.0 174 138 105 CH4
NXB_0105 5 2*105 7.6 5.8 210 167 127 CH4
NXB_0140 5 2*140 5.7 4.3 280 223 169 CH4
NXB_0168 5 2*168 4.7 3.6 336 267 203 CH5
NXB_0205 5 2*205 3.9 3.0 410 326 248 CH5
NXB_0261 5 2*261 3.1 2.3 522 415 316 CH5
NXB_0300 5 2*300 2.7 2.0 600 477 363 CH61
NXB_0385 5 2*385 2.1 1.6 770 613 466 CH61
NXB_0460 5 2*460 1.7 1.3 920 732 556 CH62
NXB_0520 5 2*520 1.5 1.2 1040 828 629 CH62
NXB_0590 5 2*590 1.4 1.1 1180 939 714 CH62
NXB_0650 5 2*650 1.2 1.0 1300 1035 786 CH62
NXB_0730 5 2*730 1.1 0.9 1460 1162 833 CH62

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