Powerware 9335 operation manual To Operate a Remote EPO, Remote EPO Wire Terminations

Table 4 – 1. Remote EPO Wire Terminations

From Remote	To X1 connector on front	Remarks
EPO Switch(s)	of inner UPS panel
Refer to switch	X1 - 1	Twisted
manufacturers		wires (2) 14-
installation	X1 - 2	18 gauge
instructions

Table 4 – 2. Remote EPO

REMOTE

EPO

SWITCH

(N.C.)

TWISTED WIRES (2)

X1 UPS

Remote EPO switch rating is 24 VDC, 1 Amp maximum

NOTE: This switch must be a dedicated switch not tied into any other circuits.

4.If you are installing multiple Remote EPO stations, wire additional stations in series with the first Remote EPO.

5.If required, install appropriate sized conduit and wiring from the Remote EPO switch to trip circuitry of upstream protective devices. A separate contact block, with the appropriate normally open or normally closed contacts, must be used for this function. Remote EPO switch wiring must be in accordance with UL Class 1 requirements.

6.Secure the UPS by reversing all steps taken to prepare it for Remote EPO installation.

4.3To Operate a Remote EPO:

1.Activation of an EPO switch will interrupt the EPO circuit and immediately shut off UPS main circuit power to the load, as well as the DC input from the battery supply.

2. Even though the EPO switch is opened, the UPS will not re-energize until the normal startup procedure is followed, which requires operator intervention at the UPS cabinet controls.

4-2	Powerware 9335 (80 kVA and 120 kVA) Installation and Operation
	164201396 REV A 071103