Special Conditions; The Purpose Of Derating; Derating For Ambient Temperature; Derating For Low Air Pressure - Danfoss VLT Micro Drive FC 51 Operating Instructions Manual

VLT Micro Drive FC 51 Operating Instructions
Control card, 10 V DC output:
Terminal number
Output voltage
Max. load
The 10 V DC supply is galvanically isolated from the supply voltage (PELV) and other high-voltage
terminals.
Surroundings:
Enclosure
Enclosure kit available
Enclosure kit available
Vibration test
Max. relative humidity 5% - 95%(IEC 60721-3-3; Class 3K3 (non-condensing) during operation
Aggressive environment (IEC 60721-3-3), coated
Test method according to IEC 60068-2-43 H2S (10 days)
Ambient temperature
Derating for high ambient temperature, see section on special conditions
Minimum ambient temperature during full-scale operation
Minimum ambient temperature at reduced performance
Temperature during storage/transport
Maximum altitude above sea level without derating
Maximum altitude above sea level with derating
Derating for high altitude, see section on special conditions
EMC standards, Emission
EMC standards, Immunity
See section on special conditions

7.3. Special Conditions

7.3.1. The Purpose of Derating

Derating must be taken into account when using the frequency converter at low air pressure
(heights), at low speeds or at high ambient temperature. The required action is described in this
section.

7.3.2. Derating for Ambient Temperature

The ambient temperature measured over 24 hours should be at least 5 °C lower than the max.
ambient temperature.
If the frequency converter is operated at high ambient temperature, the continuous output current
should be decreased.
The VLT Micro Drive FC 51 has been designed for operation at max 50 °C ambient temperature
with one motor size smaller than nominal. Continuous operation at full load at 50 °C ambient
temperature will reduce the lifetime of the frequency converter.

7.3.3. Derating for Low Air Pressure

The cooling capability of air is decreased at low air pressure.
EN 61800-3, EN 61000-6-3/4, EN 55011, IEC 61800-3
EN 61800-3, EN 61000-6-1/2, EN 61000-4-2, EN 61000-4-3,
MG.02.A2.02 - VLT ® is a registered Danfoss trademark
-25 - +65/70 °C
EN 61000-4-4, EN 61000-4-5, EN 61000-4-6
7. Specifications
50
10.5 V ±0.5 V
25 mA
IP 20
IP 21
TYPE 1
1.0 g
class 3C3
Max. 40 °C
0 °C
- 10 °C
7
1000 m
3000 m
33