dU/dt filter range
vacon •
7
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
2
Recommendations
Figure 4 shows the motor requirements based on IEC & NEMA motor standards.
Figure 4. Limiting curves of impulse voltage Upk, measured between two
motor
phase
terminals
Table 2. Typical peak voltage Upk and dU/dt values for VACON
®
100 dU/dt filters.
Values are based on default cable types given in drive manual.
Cable
length
[m] Voltage
[V]
Filter
Upk
[V]
dU/dt
[kV/us]
20
500
690
No
< 1550
< 1950
< 2.5
< 4
50
500
690
No
< 1600
< 2000
< 2.2
< 3
20
500
690
Yes
< 1150
< 1650
< 0.45
< 0.65
50
500
690
Yes
< 1190
< 1750
< 0.3
< 0.55
150
500
690
Yes
< 1200
< 1800
< 0.25
< 0.35
