UPS WITH BYPASS ELECTRICAL INSTALLATION
EATON Powerware
®
9170
+
UPS (3–18 kVA) User’s Guide S 164201393 Rev C www.powerware.com
31
12. Unscrew and remove the top rear cover of the cabinet and locate
the terminal block.
13. If the bypass switch is an MBB style, notice the cable routed out of
the left side of the bypass switch cabinet. Connect the red and
black pair of wires (normally open) in this cable to terminals 3 and 4
as shown in Figure 21. (Do not connect the white and black pair of
wires in this cable.)
CAUTION
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)
Plastic Cable Tie
Figure 21. Input Control Signal Wiring (for MBB Bypass Switch)
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