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UPS WITH BYPASS ELECTRICAL INSTALLATION
Eaton 9170
+
UPS (3–18 kVA) User's Guide S 164201393 Rev E www.eaton.com/powerquality
33
14. If any external hardwired control signals are required (EPO or
Generator On), connect the wiring as shown in Figure 21.
C A U T I O N
EPO and external bypass circuits are not isolated from line voltage, and wiring must be
installed according to local codes using conduit or suitable primary supply cables.
The Generator On signal is isolated from line voltage and can be
treated as NEC Class 2 wiring.
Use 14–20 AWG, 600V wire (UL) or 14–26 AWG, 300V wire (CSA)
for all input control signals.
Generator On
(normally open)
Signal
Common
Emergency Power-off (normally closed)
External Bypass *(short to common when active)
Generator Set
Plastic Cable Tie
Figure 21. Input Control Signal Wiring (for External Controls)
15. Place the signal wires through the proper conduit or grommet
above the terminal block and attach to appropriate terminals.
Secure each connection by torquing terminal screws to a maximum
0.4 Nm (3.5 lb in). Provide strain relief for cables by installing plastic
cable ties.
NOTE Do not strain relieve EPO or external bypass wiring with the same cable tie used for
Generator On wires.
16. Remove the jumper between terminals 5 and 6 only if you are
wiring from an EPO switch. (See “Changing Parameter Settings”
on page 83 for information about accessing menu 4 3 2 to view or
change the EPO switch type.)
17. When all connections have been made and checked, reinstall the
bypass switch front cover and UPS cabinet rear covers using the
original screws.