Danfoss VLT HVAC

1. Rise time increases/decreases proportionally with cable length.
2. U
PEAK
= DC link voltage x 1.9
(DC link voltage = Mains voltage x 1.35).
3.
dU
/
dt =
0.8 × U
PEAK
Risetime
Data are measured according to IEC 60034-17.
Cable lengths are in metres.
Frequency Converter, P5K5, T2
Cable
length [m]
Mains
voltage [V]
Rise time
[μsec]
Vpeak
[kV]
dU/dt
[kV/μsec]
36 240 0.226 0.616 2.142
50 240 0.262 0.626 1.908
100 240 0.650 0.614 0.757
150 240 0.745 0.612 0.655
Frequency Converter, P7K5, T2
Cable
length [m]
Mains
voltage [V]
Rise time
[μsec]
Vpeak
[kV]
dU/dt
[kV/μsec]
5 230 0.13 0.510 3.090
50 230 0.23 0.590 2.034
100 230 0.54 0.580 0.865
150 230 0.66 0.560 0.674
Frequency Converter, P11K, T2
Cable
length [m]
Mains
voltage [V]
Rise time
[μsec]
Vpeak
[kV]
dU/dt
[kV/μsec]
36 240 0.264 0.624 1.894
136 240 0.536 0.596 0.896
150 240 0.568 0.568 0.806
Frequency Converter, P15K, T2
Cable
length [m]
Mains
voltage [V]
Rise time
[μsec]
Vpeak
[kV]
dU/dt
[kV/μsec]
30 240 0.556 0.650 0.935
100 240 0.592 0.594 0.807
150 240 0.708 0.575 0.669
Frequency Converter, P18K, T2
Cable
length [m]
Mains
voltage [V]
Rise time
[μsec]
Vpeak
[kV]
dU/dt
[kV/μsec]
36 240 0.244 0.608 1.993
136 240 0.568 0.580 0.832
150 240 0.720 0.574 0.661
VLT
®
HVAC Drive Design Guide 8 General Specifications and Troubleshooting
MG.11.B9.02 - VLT
®
is a registered Danfoss trademark 175
8