Sageon III Power System
Installation
PM990-8800-00, Rev. 9
2-7
Plant Rack:
Ground the Power system rack to the site’s central frame ground applicable in accordance with codes and the customer’s standard
practice. Unthreaded holes for bolting an earth/safety ground wire to the rack are provided in the top and bottom, both on rear.
Remove the paint from a small area (e.g. 1.5 in/3.8 cm diameter) around the selected holes and through-bolt the ground wire lug to the
rack.
Return Bus:
Connect the plant return bus to the site’s central office ground. Select a cable size applicable in accordance with codes and the
customer’s standard practice. The minimum cable size must be capable of carrying the fault current from any installed device. Since
this is typically a high current connection, secure the wire lug to a 3/8" stud on the return bus (battery) or bolt the wire lug to 3/8"
through hole on the return bus (loads). The return buses within the plant are electrically connected. See Figure 2-3 for bus locations.
FIGURE 2-3 RETURN BUS LOCATIONS
Lightning and Transient Suppression
Rectifiers contain basic transient suppression in the form of Metal Oxide Varistors (MOVs). MOVs are installed from L1 to L2, L1 to
earth, and L2 to earth. They are sized to provide protection from line transients in an industrial environment according to ANSI
C62.41-1991 for Class B3 equipment and IEC 61000-4-5.
Supplementary transient protection is needed in a more severe environment with, for example, a high incidence of lightning strikes
(indirect or direct) and/or severe switching transients beyond the levels indicated in the above standards. Install higher rated
suppression devices to the AC electrical service where appropriate.
User's AC Electrical Service Panel
The AC electrical service panel and wiring from the service panel to the Power system is supplied by the user.
1.
Electrical shock hazard – Remove power from all involved wires and terminals before proceeding.
2.
Determine the number of AC breaker positions needed. Allow one breaker position for each Rectifier to be installed in the Power
system. Alternatively, up to two Rectifiers can be fed from one breaker provided the breaker and wiring meet local and national
electrical code requirements. Power system terminals will accept 6-12 AWG (13.6-3.3 mm
2
).
3.
Run the needed quantity of AC power cables from the service panel to the Power system.
