APC 6739380EN/JC user manual Frequency converter or parallel UPS with SSC, Isolate the UPSs

Page 32

Maintenance (cont.)

Modular UPS with external maintenance bypass

(figure 31)

To service a number of modular UPSs with an external maintenance bypass, it is necessary to isolate them.

◗isolate the UPSs

Proceed in the following order:

◗shut down each inverter (press the "inverter off" button 7 for three seconds),

◗switch to the maintenance bypass whereby the load will be directly supplied by Mains 2 via Q3BP (close Q3BP, then open Q5 in the maintenance bypass cubicle),

◗open input switch Q4S on each UPS;

◗isolate each UPS from Mains 2 by opening the upstream protection devices,

◗open input switch Q1 on each UPS,

◗open output switch Q5N on each UPS.

The UPSs are de-energised (except the Mains 1 cables upstream of the Q1 switches on each UPS), but the load is supplied with Mains 2 power via the maintenance bypass. Complete isolation of the installation requires opening of the upstream protection devices on both Mains 1 and Mains 2.

◗start-up

Once servicing is completed, proceed in the following order:

◗close the input switches Q1 and Q4S on each UPS,

◗close output switch Q5N on each UPS,

◗close output switch Q5N in the maintenance bypass cubicle,

◗open switch Q3BP in the maintenance bypass cubicle,

◗close battery circuit breaker Q1 on each UPS,

External maintenance bypass

 

Q3BP

Modular UPS 1

 

Q4S

static switch

 

mains 2

 

rectifier-

inverter

charger

Q1

Q5N

mains 1

 

QF1

 

 

battery

Modular UPS 2

load

 

 

Q5N

Q4S

static switch

 

mains 2

 

rectifier-

inverter

charger

Q1

Q5N

mains 1

 

QF1

 

 

battery

Fig. 31

◗ start all the inverters (press the

Note. It is strongly advised to call on

our after-sales support department for

"inverter on" button 6 ).

these operations.

The UPSs all come on line at the same

time if they are sufficient in number to

 

supply the load.

 

Frequency converter or parallel UPS with SSC

(figure 32)

During maintenance, the concerned UPS or converter must be isolated from Mains 1, its battery and the output circuits of the other units.

◗inverter isolation

Proceed in the following order:

◗shut down the inverter (press the "inverter off" button 7 for 3 seconds),

◗open isolating switches Q5N, QF1 and Q1 for that line.

The unit is powered down once the capacitors have discharged (a few minutes).

In redundant systems with at least one redundant UPS, the other UPSs (or converters) ensure continuity of power to the load.

Q1

mains 1

Q1

mains 1

Q1

mains 1

QF1

QF1

QF1

Q5N

Q5N

load

Q5N

Fig. 32: frequency converter exemple

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Image 32
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Contents Mgetm GalaxyTM 2 6739380EN/JC Contents Options Introduction System performanceSystem description System may also includeDifferent types of MGETMGalaxyTM 6000 systems Up to 4 UPS identical ratings can be parallel-connectedFrequency converter with battery backup power figure UPS or converter cubicles Static Switch CubicleIsolation and protection devices Operation with Mains 1 down Main operating modesNormal operation Battery charge cycle Battery timeOperation with Mains 1 restored UPS shutdown or overload Installation with an engine generator setExample of an installation with an engine generator set Output voltage quality and continuity Frequency converters without redundancyFrequency converters with redundancy Overload curveDescription of MGETMGalaxyTM 6000 cubicles Inverter cubicle250 to 400kVA UPS or frequency converter 450 to 500kVA UPS or frequency converterFor a 250 to 300kVA UPS Battery cubicleKVA UPS Static Switch Cubicle External maintenance bypass cubicleVisible control panel Static Switch Cubicle Control panelVisible control panel Mgetm GalaxyTM 6000 control panelBuzzer Operating problem light Battery operation lightLoad not protected light Load protected lightHidden control panel Light F battery temperature outside tolerances Light G battery chargingLight H inverter fault Light I battery dischargedStart-up System start-upSingle-unit or modular UPS Multi-bypass modular UPSModular UPS with external maintenance bypass Galaxy UPSParallel UPS systems with a Static Switch Cubicle Start-up of a unitFrequency converters Start-up of a rectifier/chargerFrequency converter without a battery Start-up of an inverterSingle-unit or modular UPS system Frequency converter or multi-bypass UPSShutdown Shutdown of a unitShutdown of an inverter Shutdown of an rectifier/chargerExternal maintenance bypass System shutdownSingle-unit or single modular Modular UPSBuzzer reset Parallel UPSs with SSCNo Mains With MainsAlarms Maintenance bypassSignal reception Signal transmissionEnvironment information Standard information Media ContactsAdditional remote transmission board LED signalling box optionalAdditional information Media Contacts 15 optional 30 6739380EN/JC Single-unit or single modular UPS figure MaintenanceMaintenance configuration Frequency converter or parallel UPS with SSC Isolate the UPSsBattery maintenance Vented lead-acid batteriesFunctional check AutodiagnosticsVisual check Training centers Display Monitor alphanumeric displayGeneral Red lights Lights 1 toGreen lights Display of alarms Alarm display and buzzer resetList of general alarms List of secondary alarms Mains 2 Problem Check FrequencyBattery is currently being recharged Measurement system Voltage measurements Current measurementsDisplay of voltage measurements Display of current measurementsFrequency and power measurements Battery measurementsDisplay of power and frequency measurements Display of battery measurementsBattery test see figure opposite Inverter On/Off commands Language, display contrast and buzzer volume settingsDisplay for the inverter On/Off commands Display of the settings selection screensDisplay system configuration Display system configurationLED signalling box OptionsMedia Contacts 15 additional auxiliary transmission Tele-Monitor remote indications unitRemote vision display Harmonics filter and power factor improvementVision display Battery Temperature Monitor Double bridge rectifier-chargerEmpty cubicles Mgetm GalaxyTM 6000UPSs standard input rectifier-charger50 6739380EN/JC
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