Ac Side -Prewire Set-Up - Delta M50A 261 Operation And Installation Manual

M70A Sizes of Cables (mm)
D1 51-57
D2 43-50
D3 36-43
D4 30-36
D5 26-30
M50A Sizes of Cables (mm)
D1 30.8-44.7
D2 26.8-35.4
D3 21.9-27.6
3.4.4 AC Side –Prewire Set-Up
Prior to installing conductors on terminal complete the following procedure to
make terminals ready for connections.
For each of the AC terminals (L1, L2, L3, N):
Tighten or Lose nuts with 8 mm (M70A) / 5mm (M50A) hex wrench.
If an electric tool is used, insure the torque setting is low enough to NOT over-
torque the screw.
Extreme temperature rise at the clamping point
If the contact resistance between the aluminum conductor and clamping point is too
high, the clamping point can become very hot and even catch fire in extreme cases.
To ensure a safe and reliable contact, always perform the following work steps:
Please select the Al wire size according to rules due to lower conductivity of Al.
Keep the installation location as free as possible from moisture or corrosive
atmospheres.
Connect the aluminum cables quickly.
Tighten the clamping screw in the clamping body with the maximum permissible
tightening torque.
Table 3-1: Cable size comparison table
2550 mm 2
1962 mm 2
1450 mm 2
1017 mm
2
706 mm 2
1570 mm 2
984 mm 2
598 mm 2
NOTICE
31
Torque (N•m)
8.5
8.5
8
8.5
8.5
Torque (N•m)
13
15
13
Installation
Dimension of P (mm)
7
5
5
5
5
Dimension of P (mm)
2
2
2