APC 6739380EN/JC Introduction, System performance, System description, System may also include

Introduction

System performance

A MGETM GalaxyTM 6000

uninterruptible power supply (UPS)

delivers 3-phase power with the

following characteristics:

◗ stable voltage (+/-0.5% under steady

Single-line diagram of the MGETM GalaxyTM 6000 system

state conditions and +/-5% under

transient conditions for load step

changes of 25 to 100% or of 100 to

25%);

◗ stable frequency (+/-0.05Hz without

Mains 2);

◗ or frequency synchronized with

Mains 2 to 50/60Hz +/-2Hz (value may

be configured in 0.25 HZ steps);

◗ free of micro-breaks and outages for

the duration of the battery time (10, 15

or 30 minutes);

◗ less than 4% distortion in all system

configurations with linear loads;

◗ less than 5% distortion for a 100%

non-linear load with a peak factor of up

to 3.5.

The acoustic noise level of a

MGETM GalaxyTM 6000 UPS is under

70dBA.

mains 2 (bypass input)

mains 1 (normal input)

B

maintenance bypass

					isolation
	isolation			emergency	and
					protection
				bypass
isolation		AC/DC		DC/AC
and		conversion		conversion
protection
			isolation and
			protection
			battery
A

load

System description

◗a rectifier-charger (RC) module converts 3-phase AC power from the Mains 1 supply into DC power for the normal inverter input and float charges or recharges the batteries;

◗a battery unit provides backup power for the inverter in the event of a voltage drop or a Mains 1 failure;

◗an inverter module converts the DC power supplied by the rectifier-charger module or the battery unit into 3-phase AC power for the load;

◗an emergency bypass module ensures the instantaneous transfer of the load via the static switch to the Mains 2 bypass line in the event of an inverter shutdown (initiated by the user or by a protective device) or a sudden overload;

◗a maintenance bypass which isolates the UPS for maintenance and transfers the load without interrupting the supply of power. The maintenance bypass is made up of three manual switches.

Note:

◗the Mains 1 normal input and the Mains 2 bypass input have different functions and, depending on the installation, may be protected differently upstream and/or come from different sources;

◗frequency converters are available without backup batteries;

◗the emergency bypass line and the maintenance bypass line do not exist in installations where the load frequency and the Mains 2 frequency are different (for example in frequency converters);

◗for reasons of redundancy and/or increased power, the rectifier-charger, inverter and battery modules (the UPS, part A in the MGETM GalaxyTM 6000 schematic diagram above) may be arranged in parallel lines. In this case, an isolation function is added to the output of each UPS for maintenance without disrupting the load.

In this type of system, the components of part B in the diagram are located in a separate cubicle referred to as the "Static Switch Cubicle".

The system may also include:

◗an isolating transformer on the Mains 2 line;

◗a harmonics filter on the Mains 1 input;

◗different remote control, indication and display systems;

◗a double bridge rectifier-charger module.

6739380EN/JC - Page 5