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

Input

 

 

Contactor

Contactor

 

 

Contactor

Contactor

 

 

(K1)

(K1)

 

 

(K1)

(K1)

 

 

Rectifier

Rectifier

 

Rectifier

Rectifier

 

 

Fuse

Fuse

 

 

Fuse

Fuse

 

 

Fuse

Fuse

 

Fuse

 

Fuse

 

 

Fuse

Fuse

 

 

Fuse

Fuse

 

 

Inverter

Inverter

 

 

Inverter

Inverter

 

 

Output

Output

 

 

Output

Output

 

 

Contactor

Contactor

 

 

Contactor

Contactor

 

 

(K3)

(K3)

 

 

(K3)

(K3)

 

 

 

 

 

 

 

 

 

AC Output

 

 

 

 

 

 

 

to Critical

Battery

Battery

 

Battery

Battery

E10,E9,

D Load

 

E11,

 

Converter

Converter

 

Converter

Converter

 

 

E12

 

 

 

 

 

 

 

 

Fuse

Fuse

 

Fuse

 

Fuse

 

 

Battery Contactor (K2)

Battery Contactor (K2)

Battery Contactor (K2)

Battery Contactor (K2)

UPM 4

UPM 1

UPM 2

UPM 3

FI−UPM CABINET

 

E4. E5

UPS CABINET

 

 

C

Battery

Breaker

BATTERY SYSTEM

(Not supplied with the UPS)

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 6-5. Four 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

6−7

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Powerware 10001100 kVA E1, E2, E3 E6, E7, E8, E12, Backfeed, Contactor K5, Rectifier Fuse Inverter, Inverter Output