Thomas & Betts 9395 - Manual (Page 29)

UPS 225 - 275 kVA
User’s and Installation Guide
1027212
Revision B 2
To install wiring to connections:
1. Verify the UPS system is turned off and all power sources are removed. See Chapter 5,
“UPS Operating Instructions,” for shutdown instructions.
2. If not already accomplished, remove one top screw and two bottom screws securing the
UPS left front panel (see Figure 3-1). Lift the panel straight up to remove from the panel
hanger bracket at the top of the cabinet.
3. Remove one top screw and two bottom screws securing the UPS center front panel (see
Figure 3-1). Lift the panel straight up to remove from the panel hanger bracket at the top of
the cabinet.
4. Terminal block TB3 is accessible on the left side of the X-Slot communication bay. To gain
access to terminal blocks TB1 and TB2 and the interface entry plates, loosen the screws
securing the small top internal safety shield panel and remove the panel. This panel is to
the right of the X-Slot Communication Bay (see Figure 3-7 on page 30).
5. Remove the UPS cabinet top interface entry plates to drill or punch holes (see Figure 3-3 on
page 26).
6. Reinstall the entry plates.
WARNING
Do not directly connect relay contacts to the mains related circuits. Reinforced insulation to
the mains is required.
7. To locate the appropriate terminals and review the wiring and termination requirements,
see paragraph 2.2.2 on page 14, Table 3-1, and Figure 3-6 through Figure 3-9.
8. Route and connect the wiring.
9. If wiring TB1 battery interface connections, proceed to paragraph 3.5.2; if wiring the X-Slot
connections only, proceed to paragraph 3.5.3; otherwise, proceed to Step 10.
10. When all wiring is complete, reinstall the small top internal safety shield panel and secure
with the cabinet mounted screws.
11. Reinstall the left and center front panels removed in previous steps and secure with the
retained hardware.
NOTE Alarm relay contacts have a maximum current rating of 5A and a switched voltage rating of 30 Vac and 28 Vdc.
NOTE Alarm relay normally-open and normally-closed return terminals are separated on the terminal board, but are
electrically in common.
NOTE Do not directly connect relay contacts to the mains related circuits. Reinforced insulation to the mains is required.
NOTE Alarm relay wiring should be a minimum of .75 mm2.
Figure 3-6. Typical alarm relay connection