Powerware 9335 User Manual download pdf (Page 28)

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4-2 Powerware 9335 (80 kVA and 120 kVA) Installation and Operation

164201396 REV A 071103

Table 4 – 1. Remote EPO Wire Terminations

From Remote

EPO Switch(s)

To X1 connector on front

of inner UPS panel

Remarks

X1 - 1

Refer to switch

manufacturers

installation

instructions

X1 - 2

Twisted

wires (2) 14-

18 gauge

Table 4 – 2. Remote EPO

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.

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.

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

installation.

4.3 To 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.

. 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.

X1 UPS

REMOTE

EPO

SWITCH

(N.C.)

TWISTED

WIRES (2)

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