Cables

The table below is only a guide; refer to local wiring regulations for correct size of cables. In some cases, a larger cable size is required to avoid excessive voltage drop.

Use 105°C (221°F) (UL 60/75°C temp rise) PVC-insulated cable with copper conductors having a suitable voltage rating, for the following power connectors:

  • AC supply to external EMC filter (when used)
  • AC supply (or external EMC filter) to drive
  • Drive to motor
  • Drive to braking resistor Motor cables The recommended output cable sizes assume that the motor maximum current matches that of the drive. Where a motor of reduced rating is used, programmed with the correct motor rated voltage.

Fuses

The AC supply to the drive must be fitted with suitable protection against overload and short circuits. Tables below show the recommended fuse ratings. Failure to observe this requirement will cause risk of fire.

A fuse or other protection device must be included in all live connectors to the AC supply.

An MCB (miniature circuit breaker) or MCCB (moulded case circuit breaker) with type C tripping characteristics maybe used in place of fuses as long as the fault clearing capacity is sufficient for the installation.

Fuse types
Europe: Type gG HRC fuses complying with EN60269 parts1 and 2 (BS88)
USA: Bussman Limitron KTK series, class CC fast acting
Model
SKA12
SKBD2
SKCD2
00025
00037
00055
00075
00110
00150
00220
1ph
3ph
1ph
3ph
1ph
3ph
Recomended input
supply fuse (A)
6
10
16
20
16
25
16
32
20
Control cable (mm2)
≥0.5
≥0.5
(AWG)
20
20
Recomended input
cable (mm2)
1.0
1.5
2.5
1.5
2.5
1.5
4.0
2.5
(AWG)
16
14
12
14
12
14
10
12
Recomended motor
cable (mm2)
1.0
1.0
1.5
(AWG)
16
16
14
Recommende brake
resistor cable (mm2)
1.0
1.0
1.5
(AWG)
16
16
14
Model
SKB34
SKC34
00037
00055
00075
00110
00150
00110
00150
00400
Recomended input
supply fuse (A)
TBA
TBA
10
16
20
Control cable (mm2)
≥0.5
≥0.5
(AWG)
20
20
Recomended input
cable (mm2)
1.0
1.5
2.5
(AWG)
16
14
12
Recomended motor
cable (mm2)
1.0
1.0
1.5
(AWG)
16
16
14
Recommende brake
resistor cable (mm2)
1.5
1.5
(AWG)
14
14