ABB AC 800F, Mounting And Installation Instructions Manual

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9 Technical Data of the AC 800F
9-5
9.5 Power loss specifications for cooling system calculation
The specifications in the following sections are based on the following assumptions:
•
The AC 800F is working with its nominal input voltage.
•
No safety margin has been considered for calculation. It has to be specified and
considered by the user, based on his experience.
The specifications refer to the thermal power loss in the module. The actual electrical
power consumption of the modules may be higher, since the module transfers the
consumed power in parts to the connected nodes communicating with it and does not
convert the power to heat by itself.
Calculation examples
The specified thermal power loss is composed of the basic power loss and the rated
power for each activated module. The power loss of each activated module has to be
added, hence:
Total power loss = basic power loss + total power loss of all active modules
Power loss of AC 800F (basic device) with power supply SA 801F
Basic power loss 15.3 W
Power loss of AC 800F (basic device) with power supply SA 811F
Basic power loss to be provided
Power loss of AC 800F (basic device) with power supply SD 802F on 24 V
Basic power loss 12.8 W
Power loss of AC 800F (basic device) with power supply SD 812F on 24 V
Basic power loss to be provided
Power loss of Ethernet module EI 801F
Nominal power loss 2.7 W
Power loss of Ethernet module EI 811F
Nominal power loss 2.7 W