Emerson ASTEC Helios Candeo AP6C75AA, Installation Manual

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Cabling and connecting 49
Helios Candeo Power System – AP6C75AA Installation Manual
Procedure 4.2 – Installing and connecting the battery return reference lead
Step Action
1 Connect one end of the battery return reference (BRR) ground cable to the
BR+ battery return busbar inside the Battery Connection Module (see Figure
4.4). Use the leftmost or rightmost position on the busbar, depending whether
the cable is coming from the left side or the right side of the frame.
2 Connect the other end of this cable to the SPG ground bar as identified in the
job specifications or the Customer requirements (see Figure 4.4).
3 At each end of this cable, install a permanent brass or fiber tag bearing the
mention “DO NOT DISCONNECT”, as well as a second tag bearing the mention
“BRR”.
4 Secure the cable as required.
–end–
4.3. Cabling and connecting the AC supplies for the rectifiers
This section covers the AC portion of the cabling and connecting. On the
AP6C75AA Helios Candeo power system, AC power is used mainly to feed the
rectifiers of the power plant.
The present section provides only the specific “in-box” procedures for running
the AC feeders down or up the AP6C75AA Helios Candeo frames and into the
rectifier AC interface modules.
For information on subjects such as basic rulings about AC wiring and
connecting, electrical code requirements, certified or licensed electricians
requirements, permit requirements, methods of bringing the AC supply to the
equipment, etc., refer to project or customer specifications, specific customer
guidelines and local codes and bylaws.
4.3.1. Segregation between AC conductors and other conductors
Electrical codes require that conductors carrying AC current be installed
separately from conductors carrying DC current and signals. Furthermore, some
Customer may require that the minimum distance between the AC and DC
conductors exceed that of the electrical code requirements (for example: for
noise induction purposes).
On the AP6C75AA Helios Candeo power system, this is not a problem since
the AC cabling for the rectifiers is installed either in an AC channel or on the
left side of the frame where there are no other cables. However, the installer
shall attempt to maintain segregation when running AC cables on cable racks
used for other types of cables.