Electrical Installation - Danfoss VLT HVAC Drive FC 100 Series Design Manual
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®
VLT
HVAC Drive Design Guide
5.2. Electrical Installation
5.2.1. Cables General
NB!
For the VLT HVAC Drive High Power series mains and motor connections, please see VLT HVAC Drive
tions,MG.11.FX.YY
NB!
Cables General
Always comply with national and local regulations on cable cross-sections.
Details of terminal tightening torques.
Power (kW)
Enclo-
200-240
380-480
sure
V
A2
1.1 - 3.0
1.1 - 4.0
A3
3.7
5.5 - 7.5
A5
1.1 - 3.7
1.1 - 7.5
B1
5.5 - 11
11 - 18.5
-
B2
15
B3
5.5 - 11
11 - 18.5
B4
11 - 18.5
18.5 - 37
C1
18.5 - 30
37 - 55
C2
37 - 45
75 - 90
C3
18.5 - 30
37 - 55
C4
30 - 45
55 - 90
D1/D3
-
110 - 132
D2/D4
-
160-250
E1/E2
-
315-450
Table 5.2: Tightening of terminals
1) For different cable dimensions x/y, where x ≤ 95 mm² and y ≥ 95 mm²
2) Cable dimensions above 18.5 kW ≥ 35 mm
5.2.2. Motor Cables
See section
General Specifications
for correct dimensioning of motor cable cross-section and length.
•
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.
.
525-600
Line
V
V
1.1 - 4.0
1.8
5.5 - 7.5
1.8
1.1 - 7.5
1.8
-
1.8
22
-
4.5
30
-
4.5
2)
11 - 18.5
1.8
18.5 - 37
4.5
-
10
-
1)
14/24
-
37 - 55
10
55 - 90
14/24
1)
110 - 132
19
160-315
19
355-560
19
2
and below 22 kW ≤ 10 mm
MG.11.B7.02 - VLT
®
is a registered Danfoss trademark
Torque (Nm)
DC connec-
Motor
Brake
tion
1.8
1.8
1.8
1.8
1.8
1.8
1.8
1.8
1.8
1.8
1.5
1.5
4.5
3.7
3.7
4.5
2)
3.7
3.7
1.8
1.8
1.8
4.5
4.5
4.5
10
10
10
1)
14
14
14/24
10
10
10
14/24
1)
14
14
19
9.6
9.6
19
9.6
9.6
19
19
9.6
2
5. How to Install
High Power Operating Instruc-
Earth
Relay
3
0.6
3
0.6
3
0.6
3
0.6
3
0.6
3
0.6
3
0.6
3
0.6
3
0.6
3
0.6
3
0.6
3
0.6
19
0.6
19
0.6
19
0.6
5
79
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