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WARNING
LEAKAGE CURRENT HAZARD
Leakage currents exceed 3.5 mA. Failure to ground the
frequency converter properly could result in death or
serious injury.
•
Ensure correct grounding of the equipment by
a certified electrical installer.
9.2 Cables
NOTICE
Cables General
All cabling must comply with national and local
regulations on cable cross-sections and ambient
temperature. Copper (75
°
C) conductors are
recommended.
Aluminium Conductors
Terminals can accept aluminium conductors, but the
conductor surface has to be clean and the oxidation must
be removed and sealed by neutral acid-free Vaseline
grease before the conductor is connected.
Furthermore, the terminal screw must be retightened after
2 days due to softness of the aluminium. It is crucial to
keep the connection a gas tight joint, otherwise the
aluminium surface oxidises again.
9.2.1 Tightening Torque
Enclosure
Type
200-240 V
[kW]
380-500 V
[kW]
525-690 V
[kW]
Cable for
Tightening-up torque
[Nm]
A1
0.25-1.5
0.37-1.5
-
Mains, Brake resistor, load sharing, Motor cables
0.5-0.6
A2
0.25-2.2
0.37-4
-
A3
3-3.7
5.5-7.5
1.1-7.5
A4
0.25-2.2
0.37-4
A5
3-3.7
5.5-7.5
-
B1
5.5-7.5
11-15
-
Mains, Brake resistor, load sharing, Motor cables
1.8
Relay
0.5-0.6
Ground
2-3
B2
11
18.5-22
11-22
Mains, Brake resistor, load sharing cables
4.5
Motor cables
4.5
Relay
0.5-0.6
Ground
2-3
B3
5.5-7.5
11-15
-
Mains, Brake resistor, load sharing, Motor cables
1.8
Relay
0.5-0.6
Ground
2-3
B4
11-15
18.5-30
11-30
Mains, Brake resistor, load sharing, Motor cables
4.5
Relay
0.5-0.6
Ground
2-3
C1
15-22
30-45
-
Mains, Brake resistor, load sharing cables
10
Motor cables
10
Relay
0.5-0.6
Ground
2-3
C2
30-37
55-75
30-75
Mains, motor cables
14 (up to 9 5mm
2
)
24 (over 95 mm
2
)
Load Sharing, brake cables
14
Relay
0.5-0.6
Ground
2-3
C3
18.5-22
30-37
37-45
Mains, Brake resistor, load sharing, Motor cables
10
Relay
0.5-0.6
Ground
2-3
C4
37-45
55-75
-
Mains, motor cables
14 (up to 95 mm
2
)
24 (over 95 mm
2
)
Load Sharing, brake cables
14
Relay
0.5-0.6
Ground
2-3
Table 9.1 Tightening Torque for Cables
Electrical Installation
VLT
®
AutomationDrive FC 301/FC 302 Design Guide, 0.25-75 kW
MG33BF02 - Rev. 2013-12-20
113
9
9
Содержание VLT AutomationDrive FC 301
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