4 electrical connections, power unit, Electrical connections, power unit, Table 19: tools 45 – NORD Drivesystems BU0505 User Manual
Page 45: Table 20: connection data, Notice, 2 assembly and installation, Brake voltage supply
2 Assembly and installation
BU 0505 GB-1013
45
2.10.4 Electrical connections, power unit
Before connecting the frequency inverter, the following must be observed:
1. Ensure that the mains supply provides the correct voltage and is suitable for the current required.
2. Ensure that suitable circuit breakers with the specified nominal current range are installed between
the voltage source and the inverter.
3. Connect the mains voltage directly to the mains terminals L1-L2/N-L3-PE (for each device)
4. A four-core cable must be used to connect the motor. The cable is connected to the motor
terminals PE-U-V-W.
5. If screened motor cables (recommended) are used, the cable screening must also be connected to
a large area of the metallic screening angle of the EMC Kit, however, at least to the electrically
conducting mounting surface of the control cabinet.
6. Above size 8, the cable lugs which are included in the scope of delivery must be used. After
crimping, these must be insulated with shrink hose.
Note
The use of shielded cables is essential in order to maintain the specified radio interference suppression level.
If certain wire end sleeves are used, the maximum cross-section which can be connected can be reduced.
To connect the power unit, the following tools must be used:
Frequency inverter
Tools
Type
Size 1 - 4
Screwdriver
SL / PZ1; SL / PH1
Size 5 - 7
Screwdriver
SL / PZ2; SL / PH2
Size 8 - 9
Socket wrench
SW 13
Table 19: Tools
Connection data:
Frequency inverter
BG 1 ... 4
Size 5
Size 6
Size 7
Size 8
Size 9
Rigid cable Ø
[mm²]
0.2 … 6
0.5 … 16
0.5 … 35
0.5 … 50
50
95
Flexible cable Ø
[mm²]
0.2 … 4
0.5 … 10
0.5 … 25
0.5 … 35
50
95
AWG standard
24-10
20-6
20-2
20-1
1/0
3/0
Starting torque
[Nm]
0.5 … 0.6
1.2 … 1.5
2.5 … 4.5
2.5 … 4
15
15
[lb-in]
4.42 … 5.31
10.62 … 13.27
22.12 … 39.82
22.12 … 35.4
135
135
Table 20: Connection data
NOTICE
Brake voltage supply
The voltage supply for an electro-mechanical brake (or its brake rectifier) must be via the mains.
Connection to the output side (connection to the motor terminals) may cause the destruction of the brake or the
frequency inverter.
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