Operation

Remote Emergency Power-off Input

REPO is used to shut down the UPS from a distance. This feature can be used for shutting down the load and the UPS by thermal relay, for instance in the event of room overtemperature. Remote shutdown wires are connected on connector X2 (see Figure 18 on page 46).

The pins of connector X2 have been connected together. When this connection is open, the logic circuitry completely shuts down the UPS, thus preventing the power from supplying the load.

NOTE In order to restart the UPS, the pins of connector X2 have to be connected, the battery breaker (CB1) must be reset, and the UPS ON/OFF switch must be turned off and then back on. The pins must be shorted in order to keep the UPS running. Maximum resistance is 10 ohm.

C A U T I O N

The REPO must not be connected to any utility connected circuits. Reinforced insulation to the utility is required. The REPO switch must have a minimum rating of 24 Vdc and 20 mA.

 

 

 

REPO Connections

 

 

 

 

 

 

 

Wire Function

Terminal

 

Terminal Wire Size

Suggested Wire Size

 

 

Position

 

Rating

 

 

 

 

 

 

 

REPO

L1

X2-1

 

12 - 22 AWG

18 AWG (0.75 mm2)

 

 

 

 

 

L2

X2-2

 

(4 - 0 mm2)

 

 

 

When REPO is initiated, the UPS Alarm indicator blinks and the audible alarm sounds 3 short beeps and 1 long beep.

Efficiency Optimizer Function

This feature can be activated by your service representative. The Efficiency Optimizer function minimizes power loss and reduces power consumption by automatically switching between Bypass and Online Mode according to the utility power condition.

When utility power is constant and free from disturbances, the UPS switches automatically to Bypass Mode for maximum efficiency. The UPS detects all power imperfections instantly and returns to Online Mode when necessary. As a result, the UPS reaches up to 98% average efficiency.

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Powerware® 9150 User’s Guide : www.powerware.com