UPS WITH BYPASS ELECTRICAL INSTALLATION
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
Generator On (normally open)
Signal
Common
Plastic Cable Tie
Emergency |
External Bypass *(short to common when active)
Generator Set
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.
Eaton 9170+ UPS | 33 |
