APC 6000 user manual Parallel connected UPS with Static Switch cubicle, UPS without Mains

Page 19

UPS theory of operation (continued)

Parallel connected UPS with "Static Switch" cubicle

Up to six parallel connected rectifier-inverter cubicles can be combined with one "Static Switch" cubicle to form a system that

The units have separate batteries:

static by-pass switch

operates like a unitary UPS system. Each parallel connected rectifier- inverter cubicle houses a:

◗rectifier-charger;

◗battery;

◗three-phase inverter. The "Static Switch" cubicle contains:

◗static by-pass switch;

◗maintenance bypass.

Mains 2

rectifier- charger

Mains 1

rectifier- charger

Mains 1

inverter

battery inverter

load

battery

UPS without Mains 2

All UPSs without Mains 2 contain the same sub-assemblies:

◗rectifier-charger;

◗battery (option);

◗three-phase inverter.

They may or may not be parallel connected depending on type and may or may not contain a battery. The output voltage has a frequency of 50 or 60 Hz.

Operation without battery

Mains 1 power up:

◗the inverter receives power from the rectifier-charger and supplies power to the load. There is no direct connection between Mains 1 and the load.

Mains 1 power down:

◗no power to the load.

Maintenance position (disconnected):

◗no power to the load (except in parallel connected systems, where other units supply power).

rectifier-

chargerinverter

Mains 1

load

rectifier-

chargerinverter

Mains 1

load

rectifier-

chargerinverter

Q1	Q5N
Mains 1	load

6739389EN/FB - Page 19

Image 19

Contents GTC link communication interface Mgetm GalaxyTM2 6739389EN/FB Contents COM module PresentationIntroduction ACQ moduleInterface Communication settingsJbus protocol Synchronizing data exchanges PrincipleDescription of request and response frames Checking received messages on the slave side Function 1 and 2 read N bits FunctionsFunction 5 writing a bit Function 3 and 4 read N wordsFunction 6 writing a word Function 8 reading error diagnosis countersFunction 15 writing n consecutive bits Function 11 reading event countersMSB LSB MSB LSB MSB Function 16 writing n consecutive wordsCRC 16 algorithm Example of CRC computation Table of Most Significant Bytes for CRC16 Computation Example of CRC 16 computation in C using table lookupJbus protocol Unitary UPS UPS theory of operationOperation without battery Parallel connected UPS with Static Switch cubicleUPS without Mains Operation with battery Unitary UPS Block diagramMeasured quantities Main status bits UPS operating information Normal operation Load on batteryOperating modes Load on Mains Load on bypass Parallel connected UPS Main status bits of system operations Normal operation Load on battery DisconnectedStatic Switch cubicle Main indicators of system operations Static SwitchNormal operation Load on Mains Load on bypass Message format Example of read data array commands sent by the terminalSample commands List of variable fields System informationTables of measured data General definitions Signaling fieldCurrent fields Voltage fields Power fields Frequency fieldsTables of binary data Battery and adjustments fieldsRectifier-charger Connectivity InverterGlobal information Table of control devicesWord address Glossary of information descriptorsInverter stack overload 0=no/1=overload Word address 4C Word address 4AWord address 4E summary Word address 4DWord address C1 C10 call reset 0= not activated / 1=activated

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