4.6.11 Mains Connection
Mains must be connected to terminals 91, 92 and 93 located on the far left of the unit. 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
NB!
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.
4.6.12 External Fan Supply
Frame size D-E-F
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.
4.6.13 Power and Control Wiring for Unscreened Cables
Induced Voltage!
Run motor cables from multiple drives separately. Induced voltage from output motor cables run together can charge equipment
capacitors even with the equipment turned off and locked out. Failure to run output cables separately could result in death or serious
injury.
Run drive input power, motor wiring, and control wiring in three separate metallic conduits or raceways for high frequency noise
isolation. Failure to isolate power, motor, and control wiring could result in less than optimum controller and associated equipment
performance.
Because the power wiring carries high frequency electrical pulses, it is important that input power and motor power are run in separate conduit. If the
incoming power wiring is run in the same conduit as the motor wiring, these pulses can couple electrical noise back onto the building power grid. Control
wiring should always be isolated from the high voltage power wiring.
When screened/armoured cable is not used, at least three separate conduits must be connected to the panel option (see figure below).
• Power wiring into the enclosure
• Power wiring from the enclosure to the motor
• Control wiring
4 How to Install
VLT AQUA Low Harmonic Drive Operating In-
structions
54 MG.20.T1.02 - VLT
®
is a registered Danfoss trademark
4
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