Danfoss VLT 6000 HVAC Manuel de service télécharger pdf (Page 160)

VLT

6000 HVAC

160

MG.60.B1.02 - VLT is a registered Danfoss trade mark

■■

■ Derating for ambient temperature

The ambient temperature (T

AMB,MAX

) is the maximum

temperature allowed. The average (T

AMB,AVG

) measured

over 24 hours must be at least 5ºC lower.

If VLT 6000 HVAC is operated at temperatures above

45 ºC, a derating of the continuous output current is

necessary.

■■

■ Derating for air pressure

Below 1000 m altitude no derating is necessary.

Above 1000 m the ambient temperature (T

AMB

) or

max. output current (I

VLT,MAX

) must be derated in

accordance with the diagram below:

1) Derating of output current versus altitude at

AMB

= max. 45°C

2) Derating of max. T

AMB

versus altitude at 100%

output current.

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Danfoss VLT 6000 HVAC Manuel de service Page 160