3.6.11 Shielding against Electrical Noise
Before mounting the mains power cable, mount the EMC metal cover to ensure best EMC performance.
NOTE: The EMC metal cover is only included in units with an RFI filter.
Illustration 3.50: Mounting of EMC shield.
3.6.12 Mains connection
Mains must be connected to terminals 91, 92 and 93. Earth is connected to the terminal to the right of terminal 93.
Terminal No.
Function
91, 92, 93
94
Mains R/L1, S/L2, T/L3
Earth
Check the name plate to ensure that the mains voltage of the frequency converter matches the power supply of your plant.
Ensure that the power supply can supply the necessary current to the frequency converter.
If the unit is without built-in fuses, ensure that the appropriate fuses have the correct current rating.
3.6.13 External Fan Supply
In case the frequency converter is supplied by DC or if the fan must run independently of the power supply, an external power supply can be applied.
The connection is made on the power card.
Terminal No.
Function
100, 101
102, 103
Auxiliary supply S, T
Internal supply S, T
The connector located on the power card provides the connection of line voltage for the cooling fans. The fans are connected from factory to be supplied
form a common AC line (jumpers between 100-102 and 101-103). If external supply is needed, the jumpers are removed and the supply is connected
to terminals 100 and 101. A 5 Amp fuse should be used for protection. In UL applications this should be LittleFuse KLK-5 or equivalent.
3 How to Install
VLT AQUA High Power Operation Instructions
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MG.20.P3.02 - VLT
®
is a registered Danfoss trademark
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