Galaxy PW™ UPS 100 to 225kVA

1.4Different Types of Galaxy PW™ Systems1.4.1Single UPS System

Figure 1-2: Galaxy PW™ Single UPS System.

 

 

Legend:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Q1

(Molded CB NA): Isolation of

 

 

rectifier/

 

 

 

inverter (B):

 

 

 

the rectifier/charger (A) from

 

 

charger (A):

 

 

 

DC to AC

 

 

 

the normal AC source (1);

 

 

AC to DC

 

 

 

power

isolation and

 

 

 

 

 

 

 

 

 

rectifier/charger (A) start-up.

 

 

power

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

protection:

 

 

 

*FUSE

 

 

 

 

 

 

 

 

Q5N

 

 

 

normal (1)

 

 

 

 

 

 

 

*FUSE

load

QF1

(circuit breaker): Battery (D)

 

 

 

 

 

 

 

 

 

 

 

AC input

Q1

 

 

 

 

 

 

 

 

 

 

 

 

protection and isolation.

 

isolation

 

 

 

 

 

 

 

 

 

 

 

 

 

 

and

 

 

 

 

 

 

QF1: isolation

 

Q5N

(switch): Isolation of the UPS

 

protection

harmonic

 

 

 

 

 

 

 

 

 

and protection

 

 

(B) from the load.

 

 

fliter

 

 

 

 

 

 

 

 

 

 

 

 

 

battery (D):

 

 

Q4S

(switch): Isolation of the static

 

 

 

 

 

 

 

 

backup power

 

 

bypass (C) from the bypass

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

isolation:

 

 

 

 

 

 

 

 

 

AC source (2).

 

 

 

static bypass (C):

 

 

 

 

 

Q4S

 

 

Q3BP

(switch): Bypass switch for

(2)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

bypass

 

 

 

 

 

 

 

 

 

 

 

 

 

maintenance.

AC input

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

maintenance bypass:

 

 

FUE

(fuses): Protection of the

 

 

 

 

 

 

 

 

Q3BP

 

 

 

 

 

 

 

 

 

rectifier/charger (A) from the

 

 

 

 

 

 

 

 

 

 

 

 

 

 

normal AC source.

 

 

 

 

 

 

 

 

 

 

 

 

 

FUS

(fuses): Protection of the

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

inverter (B) from the load.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Switch Q3BP is lock on open

 

 

 

 

 

 

 

 

 

 

 

 

 

 

position on parallel UPS

systems constituted to increase available power.

Note: *The Fuse is to protect against catastrophic rectifier/inverter semiconductor failure.

1.4.2Parallel UPS System

Parallel UPSs can be utilized when increased power is required (two to four parallel units), or an external bypass must be added.

CAUTION

PARALLEL UPS WITH EXTERNAL MAINTENANCE BYPASS During mainte-

 

nance operation, when CB1 (MBP) is closed and CB2 (UPS ISOLATION) is

 

open, each UPS control panel display will show a message “LOAD

 

PROTECTED” when the UPS is placed in ON-LINE MODE. In this mode the

 

critical load is not protected because it is supplied by the maintenance

 

bypass power.

 

 

1 — 4

Introduction

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