6 Electrical Installation
6.1 Connections - Enclosure Types A, B and C
6.1.1 Torque
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.
Enclosure
type
200-240 V
[kW]
380-480 V
[kW]
525-690 V
[kW]
Cable for
Tightening up torque
[Nm]
A2
1.1-2.2
1.1-4
-
A3
3-3.7
5.5-7.5
-
A4
1.1-2.2
1.1-4
A5
1.1-3.7
1.1-7.5
-
B1
5.5-11
11-18
-
Mains, Brake resistor, load sharing, Motor cables
1.8
Relay
0.5-0.6
Ground
2-3
B2
15
22-30
11-30
Mains, Brake resistor, load sharing cables
4.5
Motor cables
4.5
Relay
0.5-0.6
Ground
2-3
B3
5.5-11
11-18
-
Mains, Brake resistor, load sharing, Motor cables
1.8
Relay
0.5-0.6
Ground
2-3
B4
15-18
22-37
-
Mains, Brake resistor, load sharing, Motor cables
4.5
Relay
0.5-0.6
Ground
2-3
C1
18-30
37-55
-
Mains, Brake resistor, load sharing cables
10
Motor cables
10
Relay
0.5-0.6
Ground
2-3
C2
37-45
75-90
37-90
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
22-30
45-55
-
Mains, Brake resistor, load sharing, Motor cables
10
Relay
0.5-0.6
Ground
2-3
C4
37-45
75-90
-
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 6.1 Tightening-up Torque
Electrical Installation
Design Guide
MG11BC02
Danfoss A/S © Rev. 06/2014 All rights reserved.
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