Danfoss VLT AHF 005 Design Guide

380–480 V
Model Cable
length
[m (ft)]
Mains
voltage
[V]
Rise
time
[µs]
Peak
voltage
[V]
dU/dt
[V/µs]
P315–P1M0
(380–480 V)
30 (98.5) 500 0.71 1165 1389
30 (98.5)
500
1)
0.80 906 904
30 (98.5) 400 0.61 942 1233
30 (98.5)
400
1)
0.82 760 743
Table 10.37 dU/dt Enclosures E1–E2 and F1–F13, 380–480 V
1)
With Danfoss dU/dt lter
525–690 V
Model Cable
length
[m (ft)]
Mains
voltage
[V]
Rise
time
[µs]
Peak
voltage
[V]
dU/dt
[V/µs]
P450–P1M4
(525–690 V)
30 (98.5) 690 0.57 1611 2261
30 (98.5) 575 0.25 – 2510
30 (98.5)
690
1)
1.13 1629 1150
Table 10.38 dU/dt Enclosures E1–E2 and F1–F13, 525–690 V
1)
With Danfoss dU/dt lter.
10.15 Electromagnetic Compatibility (EMC) Overview
Electrical devices both generate interference and are aected by interference from other generated sources. The electro-
magnetic compatibility (EMC) of these eects depends on the power and the harmonic characteristics of the devices.
Uncontrolled interaction between electrical devices in a system can degrade compatibility and impair reliable operation.
Interference takes the form of the following:
•
Electrostatic discharges
•
Rapid voltage
uctuations
•
High-frequency interference
Electrical interference is most commonly found at frequencies in the range 150 kHz to 30 MHz. Airborne interference from
the drive system in the range 30 MHz to 1 GHz is generated from the inverter, motor cable, and the motor.
Capacitive currents in the motor cable, coupled with a high dU/dt from the motor voltage, generate leakage currents. See
Illustration 10.26. Shielded motor cables have higher capacitance between the phase wires and the shield, and again
between the shield and ground. This added cable capacitance, along with other parasitic capacitance and motor inductance,
changes the electromagnetic emission signature produced by the unit. The change in electromagnetic emission signature
occurs mainly in emissions less than 5 MHz. Most of the leakage current (I1) is carried back to the unit through the PE (I3),
leaving only a small electromagnetic
eld (I4) from the shielded motor cable. The shield reduces the radiated interference
but increases the low-frequency interference on the mains.
Electrical Installation Con... Design Guide
MG16C302 Danfoss A/S © 11/2017 All rights reserved. 191
10 10

Danfoss VLT AHF 005 Specifications

General

Brand	Danfoss
Model	VLT AHF 005
Category	DC Drives
Language	English