Derating For Ambient Temperature; Switching On The Input - Danfoss VLT 8000 AQUA series Operating Instructions Manual

Derating for ambient temperature

The ambient temperature (T
temperature allowed. The average (T
over 24 hours must be at least 5ºC (9°F) lower.
• The current of VLT 8152-8652, 380-480 V and
VLT 8052-8402, 525-690 V, is to be derated
1%/Deg C above 40° C to 55° C maximum.
Derating for air pressure
Below 1000m/3300 ft altitude no derating is necessary.
Above 1000m/3300 ft the ambient temperature (T
or max. output current (I
in accordance with the diagram below:

Switching on the input

Switching on the input depends on the mains
voltage in question.
The table states the waiting time between cut-ins.
Mains voltage 380 V
Waiting time 48 s
MG.83.A2.02 - VLT is a registered Danfoss trademark
) is the maximum
AMB,MAX
) measured
AMB,MAX
AMB
) must be derated
VLT,MAX
415 V 460 V
65 s 89 s
VLT
If VLT 8000 AQUA is operated at temperatures
above 45ºC (113°F), a derating of the continuous
output current is necessary.
• VLT 8502-8652, 525-690 V is to be derated
1.5%/° C above 40° C to 55° C maximum.
1. Derating of output current versus altitude at
T = max. 40°C (113°F)
AMB
2. Derating of max. T
)
100% output current.
®
8000 AQUA
versus altitude at
AMB
187