Emerson ASTEC Helios Candeo AP6C75AA, Installation Manual

Page: 43 / 96

Cabling and connecting 43
Helios Candeo Power System – AP6C75AA Installation Manual
500 MCM (or kcmil) 500000 253.36 300
535 MCM (or kcmil) 535300 271 300
750 MCM (or kcmil) 750000 380.00 400
777 MCM (or kcmil) 777700 394 400
Note 1:
For large cables, sizes are expressed using the shortcut notation
MCM or kcmil which both represent “thousands of circular mils”.
Note 2:
Wire sizes 0, 00 and 0000 are also represented as 1/0, 2/0 and 4/0
respectively.
4.1.3. Torque values for bolted connections
Bolted connections should be properly tightened to ensure appropriate contact
without stressing or breaking the bolts. This is done by using a torque wrench to
apply the appropriate torque value. The following Table provides a list of torque
values applying to various sizes of bolts.
Table 4.6 – Torque values for bolted connections
Bolt size Threads/inch Torque (in-lb) Tension (lb)
# 8
#10
1/4”
5/16”
3/8”
7/16”
1/2”
5/8”
3/4”
7/8”
1”
32
36
24
32
20
28
18
20
16
24
14
20
13
20
11
10
9
8
18
20
23
32
80
100
140
150
250
275
400
425
550
575
920
1400
1950
2580
625
685
705
940
1840
2200
2540
2620
3740
3950
5110
5120
6110
6140
7350
9300
11100
12900
4.1.4. Cabling layout
The AP6C75AA Helios Candeo power system makes use of plug-in interfaces
that reduce cabling operations to a minimum. The cabling required to be done at
the time of installation is very straightforward.
•
The rectifier’s AC cables enter the frame on the left side, as viewed from the
front, and are brought to the rectifier AC interface modules, some inside the
fame upright and some on the outside of the frame for individual armored
cables, or through the AC channel for the bulk wiring option.