UNDERSTANDING UPS OPERATION

AC Input to

AC Input to

 

Battery Aux

Building Alarms

UPS Rectifier

Bypass

 

 

 

3 Wire A−B−C

3 or 4 Wire A−B−C

 

48V Battery

Alarm Relays

Rotation

Rotation

Bypass

Shunt Trip

X−Slot

 

 

Breaker

 

A

B

Remote EPO

Interface

(CB4)

 

 

E1, E2, E3

E6, E7,

 

Interface Board

 

 

E8, E12

 

 

 

 

 

 

 

Input Breaker

 

Static

 

 

 

(CB1)

Fuse

Switch

Backfeed

 

 

(optional)

 

 

 

 

 

Contactor (K5)

 

 

 

 

 

 

 

Input

 

Input

Input

 

 

Contactor

 

Contactor

Contactor

 

 

(K1)

 

(K1)

(K1)

 

 

Rectifier

 

Rectifier

Rectifier

 

 

Fuse

 

Fuse

Fuse

 

 

Fuse

Fuse

 

Fuse

 

 

Fuse

 

Fuse

Fuse

 

 

Inverter

 

Inverter

Inverter

 

 

Output

 

Output

Output

 

 

Contactor

 

Contactor

Contactor

 

 

(K3)

 

(K3)

(K3)

 

 

 

 

 

 

 

AC Output to

 

 

 

 

E9, E10,

Critical Load

 

 

 

 

D

Battery

Battery

Battery

E11, E12

 

 

Converter

Converter

Converter

 

 

Fuse

Fuse

 

Fuse

 

 

Battery Contactor (K2)

 

 

 

Battery Contactor (K2)

 

 

 

 

UPM 1

 

 

 

 

UPM 2

 

 

 

 

 

 

E4. E5

C

Battery

Breaker

BATTERY SYSTEM

(Not supplied with the UPS)

Battery Contactor (K2)

 

UPS

UPM 3

CABINET

NOTE Callout letters A, B, C, and D map to Table 3-4on page 3−9.

Service Connector

NOTE If the load requires a neutral, a bypass source neutral must be provided. If the load does not require a neutral and there is no neutral conductor connected at the bypass input, a neutral to ground bonding jumper must be installed. DO NOT install both a source neutral and a bonding jumper.

Figure 6-7. Three UPM UPS System, Dual-Feed, Common Battery System

EATON Powerware® 9395 UPS (1000–1100 kVA) Installation and Operation Manual S 164201764 Rev 1 www.powerware.com

6−9

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Powerware 10001100 kVA Rectifier Fuse Inverter Output, Converter Fuse Battery Contactor K2, E4. E5 Battery Breaker