Delta M70A 262, Operation And Installation Manual

Page: 31 / 172

Prior to install conductors on the terminal, please complete the following procedure
to make terminals ready for connections.
For each of the AC terminals (L1, L2, L3, N):
Tighten / Lose nuts with 8 mm hex wrench. If an electric tool is used, insure the
torque setting is low enough to NOT OVER-TORQUE the nuts.
Sizes of Cables (mm)
D1
D2
D3
D4
D5 51-57
43-50
36-43
30-36
26-30 2550 mm 2
1962 mm 2
1450 mm 2
1017 mm 2
706 mm 2
8.5
8.5
8
8.5
8.5
7
5
5
5
5
Torque (N
•
m) Dimension of P (mm)
3.4.4 AC Side –Prewire Set-Up
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.
NOTICE
Table 3-1: Cable size comparison table
Figure 3-14: AC Gland with multiple inlet
D1 D3 D4 D5 D2
P
31
Installation