SitePro UPS 400Vac / CEGE Consumer & IndustrialAugust 2004

Applications

Computer and Data CentersServer Farms

Process ControlBroadcasting / SAT SystemsRadar control installations

Air traffic controlInternet Service Providers

Safety Systems in Power PlantsMedical Imaging Equipment

Mission Critical Applications requiring highest levels of protection and reliability

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Range

- Separate bypass feed possible- Maintenance bypass integrated- Same control electronics across the range

10-40 kVA 60-120 kVA

150-300 kVA 400-500 kVA

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Main Features

• True On-Line, double conversionwith isolation transformer (VFI)

• State of the art technology

• Small footprint

• High efficiency (up to 94.5%)

• Best in class Output Power Factor

• Superior Battery Management (SBM)

• Back feed protection

• RPA configuration up to 8 units• Extensive Interfacing Features

• Various options

Concept

• independence of theinput and output voltage and frequency (VFI)

• no break transfer tobattery or bypass power

• back feed protection (standard)

• manual bypass tofacilitate maintenance

• output transformer forgalvanic isolation

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6

Back feed protection

Load

Battery bank

DC Cap

IGBT Inverter

Thyristor rectifier

Inverter isolation

transformer

Mains

DC link voltage

Static Bypass

back feed protection K6

Bypass

• Back feed protection K6 : preventing feedback to the mains from theinverter in case of mains failure and a fault in the bypass circuit

• It provides a safer environment for end users and engineers• GE provides back feed protection as a standard. Others as option• Back feed protection is mandatory according to EN62040-1 (UPS safety)

State of the Art Technology

• Higher reliability• Easy customisation

Fully digital• Less parts count• No potentiometers

DSP inside + SMD• Faster POS

(Power Operating System)

• Higher reliability due to higher integration

• Enhanced overall reliability

• Improved immunity againstelectrical disturbances

IGBT & SVM• High efficiency

• Digital IGBT control• Energy savings

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Softstart

The thyristor rectifier can be activated gradually. In that way the full load will not be connected to the utility or genset preventing an instable situation. Softstart is programmable (default: 30 seconds)

Thyristor rectifier

Mains

Soft start by changing the firing angle of thyristors

Current

From

Mainstime

Talud100%

0%

Please note that soft start is not related

to inrush current

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Performance IEC 62040-3

Level 1: Output voltage dependency from utility XXX YY ZZZ

VFI – Topology ( Double conversion/on-line)

Voltage & Frequency Independent

SitePro

Inverter

~ - - ~ Load

Rectifier

Utility

Battery

VI – Topology ( UPS-Utility-Parallel operation / single conversion / Line-interactive )

Voltage Independent

Utility

Inverter &Charger

~~

Load

Converter

Impedance

- ~Battery

VFD – Topology (off-line)

Voltage & Frequency Dependent ~ - - ~BatteryCharger Inverter

Utility

Switch

Load

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Performance IEC 62040-3

Level 2: Output voltage quality depending on load (XXX YY ZZZ)

Sine wave: THD < 8% (IEC 61000-2-2/-4) for all linear and non-linear loads (SitePro)

Non-sine wave: THD > 8 % with non-linear load

Non-sine wave: out of tolerance of IEC 61000-2-2/ -4

S

X

Y

S

X

Y

Battery operationNormal operation

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Performance IEC 62040-3

Level 3: Dynamic output voltage behaviour (XXX YY ZZZ)

Class 1

Class 2

Class 3

ZZZ

SitePro

Dynamic load changes with non-linear load (0% – 100%– 0%)Dynamic load changes with linear load (0% – 100% – 0%)Change of operation mode (Utility – battery / Inverter - By-pass)

Performance IEC 62040-3

VFI Voltage & Frequency IndependentFrequency Converter operation available

SS Output voltage THD < 8% for all loadsSitePro: THD < 3% for all loads

111 Class 1 performance

SitePro exceeding Class 1‘’Best in Class’’ dynamic response:+/-2% at load step: 0-100%-0+/-1.5% at load step: 0-50%-0

Class 1

SG Series

SitePro maintains its performance, also at unbalanced loads

SitePro Classification: VFI – SSS - 111

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Output Power Factor

Trend: most computer power supplies have power factor correctionThat means UPS systems have to supply loads with a high power factorSitePro has an output power factor (PF) higher than industry standardThis prevents the need for over sizing the UPS

Example Load:

80 kVA / 70 kWPF: 70/80 = 0.875

Standard UPS:

80 kVA / 64 kWPF: 64/80 = 0.80

SitePro:

80 kVA / 72 kWPF: 72/80 = 0.90

In this case a standard UPS with output power factor 0.8 is not sufficient to supply the load, even though the rating is 80kVA.SitePro UPS can deliver more active power (kW) in comparison to an other UPS of the same rating

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Efficiency

Often a UPS is oversized with respect to the loadUsually it runs at partial load (in particular in parallel configurations)For most UPS systems this is not the optimal working pointThis causes the efficiency to be lower than at nominal powerWith a special inverter control strategy the SitePro has a very constant efficiency, for every load situation

Efficiency vs. Load

70%

75%

80%

85%

90%

95%

25% 50% 75% 100%

Load

Effic

ienc

y

SitePro Other UPS

Typical point of specification: full load

Typical area of practical use

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Efficiency – Super ECO Mode

AC

AC

DC

DC

Bypass

VFI Concept:

+ optimal protection formission critical applications

- energy losses

Balance:

For less critical loads run UPS on bypass continuously

In case mains is out of limits transfer the load to inverter

Super ECO Mode: not only is the load supplied on bypass, but the inverter is also switched off, increasing energy savings

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Efficiency – Super ECO Mode

Super ECO mode• Efficiency : 98% • to Inverter in case Bypass is out of limits • Fast error detection• Extremely short transfer times (<2 ms)• User definable scheduling• Available for 10 – 500 kVA

Bypass on/off

Inverter current

Inverter control

Output voltage

Fast Transfer to Inverter

< 2ms

Click here for more details on Super ECO

Mode

Superior Battery Management

Because the thyristor rectifier can be controlled,the DC voltage can regulated down; just below the battery voltage. In that way the batteries can be tested. In case the batteries would havea failure, the rectifier is still supplying sufficientDC voltage to support the inverter.

Thyristor rectifier

Mains

Decreasing the DC voltage making a current flow from

the batteries

SLA and NiCad battApplication flexibility

High recharge current availableTo support large battery capacities

Prediction of true backup timeNo surprises

Charger temp. compensatedTo prevent overcharging

Progammable safe battery testNo risk to interrupt load supply

Battery earth fault detectionSafety for personell

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Reliability

RPA features• Up to 8 units in parallel• Any UPS able to be the logic leader• Decentralized bypass• Redundant Communication Bus• Transparent failover and recovery

process • True redundancy with no single point

of failure

To critical load

Utility Supply

Click here for more information

about RPA

SitePro is one of the most Reliable UPS systems in the market,using proven technology

To increase system reliability more units can be connected in parallelwith GE‘s unique RPA concept

Interfacing Features

1x RS232 Serial Communication Port

6 programmable potential free alarm contacts:- D plug - Terminals blocks

1x Emergency Power OFF contact

1x Gen-ON Input contact

1x Control Input contact

Optional: SNMP Interface Card (10/100Mbps auto-select)

MODBUS RTU Interface (RS232 or RS485)

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Options for SitePro

Option kVA rating: 10-15 20-30 40-60 80 - 300 400-500

5th hamonic filter x x x x

DCU (5th+7th+11th+13th harm.filter) x x

12 pulse rectifier x x standard

12 pulse rectifier with galvanic separation x x x

11th & 13th harmonic filter (with 12 pulse) x x

Active Filter x x

Isolation transformers (rect. and/or bypass) x x x x x

Parallel junction output cabinets x x x x x

Matching battery cabinets x x x x x

Battery fuse box x x x x x

Top cable entry box x x x

Remote monitoring system x x x x x

Remote signalling box x x x x x

Special colours x x x x x

SNMP Interface card x x x x x

JUMP, IRIS x x x x x

Conclusion

Highly ReliableVFI conceptWith Isolation TransformerRPABackfeed Protection Standard

Excellent PerformanceSoftstartOutput exceeding standardsConstant efficiencySuperior Battery ManagementSuper ECO Mode

Many Options

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