Danfoss VLT AQUA Design Manual page 87

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VLT AQUA Drive Design Guide
1. Fasten decoupling plate to the bottom of the frequency converter with screws and washers from the accessory bag.
2. Attach motor cable to terminals 96 (U), 97 (V), 98 (W).
3. Connect to earth connection (terminal 99) on decoupling plate with screws from the accessory bag.
4. Insert terminals 96 (U), 97 (V), 98 (W) and motor cable to terminals labelled MOTOR.
5. Fasten screened cable to decoupling plate with screws and washers from the accessory bag.
All types of three-phase asynchronous standard motors can be connected
to the frequency converter. Normally, small motors are star-connected
(230/400 V, D/Y). Large motors are delta-connected (400/600 V, D/Y).
Refer to the motor name plate for correct connection mode and voltage.
NB!
In motors without phase insulation paper or other insulation reinforcement suitable for operation with voltage supply (such as a fre-
quency converter), fit a Sine-wave filter on the output of the frequency converter.
No. 96
U
U1
W2
U1
No. 99
PE
5.2.5. Motor Cables
See section General Specifications
• Use a screened/armoured motor cable to comply with EMC emission specifications.
• Keep the motor cable as short as possible to reduce the noise level and leakage currents.
• Connect the motor cable screen to both the decoupling plate of the frequency converter and to the metal cabinet of the motor.
• Make the screen connections with the largest possible surface area (cable clamp). This is done by using the supplied installation devices in the
frequency converter.
• Avoid mounting with twisted screen ends (pigtails), which will spoil high frequency screening effects.
• If it is necessary to split the screen to install a motor isolator or motor relay, the screen must be continued with the lowest possible HF impedance.
97 98 Motor voltage 0-100%
V W of mains voltage.
3 wires out of motor
V1 W1
6 wires out of motor, Delta-connected
U2 V2
V1 W1 6 wires out of motor, Star-connected
U2, V2, W2 to be interconnected separately
(optional terminal block)
Earth connection
for correct dimensioning of motor cable cross-section and length.
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MG.20.N3.02 - VLT is a registered Danfoss trademark
5. How to Install
5
87