Vacon NX series User Manual

4
vacon • 50 Active Front End (AFE)
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
4.16 Derating
The output power has to be derated if one of following cases:
• Ambient temperature is more than 40 ºC (104 °F).
• Installation altitude is more than 1000 m.
4.16.1 Ambient Temperature
The power rating of the Active Front End unit is valid for an ambient temperature of 40 ºC (104 °F).
If the device is to be used in higher ambient temperatures, its power rating must be subjected to
derating. The derating coefficient from 40 °C to 50 °C, use derating factor 1.5 %/1 °C, and from 50
°C to 55 °C, use derating factor 2.5 %/1 °C, for ambient temperatures not exceeding 55 °C (131 °F).
The reduced power is calculated using the formula:
Figure 21. Derating as the ambient temperature
P
de
= P
n
*((100% - (t - 40 ºC)*X)/100)
P
n
= nominal power of the unit
t = ambient temperature
x = derating coefficient
A Ambient temperature, °C
BLoadability, %
CLoadability %
C
11167A_00
0
10 20 30 40 50 60
0%
20%
40%
60%
80%
100%
120%
B
A

Vacon NX series Specifications

General

Product type	AC Drive
Output voltage range	0-Uin
Frequency range	0-500 Hz
Enclosure classes	IP00, IP21
Mounting types	Wall
Braking chopper	Integrated or external
EMC filter	Built-in or external
Control modes	Scalar, Vector
Protection features	Overcurrent, overvoltage, undervoltage, overtemperature, short circuit
Communication options	Modbus, Profibus, CANopen, Ethernet
Ambient temperature range	-10°C to +50°C
Cooling method	Air-cooled