LP Series 400V CEGE Consumer & IndustrialSeptember 2004

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Range

• CE Marked, 400V In & Out, 50/60Hz

• kVA Ranges– 10-20-30kVA

• True On-Line, Double Conversion– Voltage and frequency

independent – Transformerless

• Superior Performance– Superior Battery Management– Excellent Output Regulation

• Clean Input – High input power factor (0.98)– Low input current THD (<8%)

• Redundant Parallel Architecture™– Up to 4 units parallel– Decentralized bypass

• 24x7 Field Service Coverage

Digital Energy™ LP 33 Series UPS10-20-30 kVA Power400 VAC 50/60 Hz

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Technical Description

• Neutral connection is required

• Two battery strings

• Filtering is done by inductors and capacitors

• Two DC link voltages

• Booster is creating a regulated DC link

• Neutral is ‚‘through-going‘‘ (input neutral = output neutral)

Battery bank 2x

DC Cap

2x

IGBT InverterRectifier

LC

filterMains

DC link -

DC link +

Booster +

Booster -

Through going neutral

Batt.Charger

Batt.Charger

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Input voltage window

Extremely Wide Voltage Window Less battery operationsVoltage :- 25% +20%Frequency :+/- 10%

Wider Range is Better

+10%-15%

Input Voltage

Input Frequency

208Vac +20%-25%

+5%

-5%Competition

+10%

-10%

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Input performance

Harmonics Feedback

• Current THDi : <8%

• Power Factor : >0.98

Advantages:

• No additional filters required

• Prevents need for oversized GenSet

• Reduced cost for cabling and fusing

Sinusoidal input current waveshape

(THD <8%)

0 1000 2000 3000 4000 5000 6000 7000 8000 9000-0.08

-0.06

-0.04

-0.02

0

0.02

0.04

0.06

0.08segnale

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Energy Consumption

Efficiency: 91% (double conversion mode)

AC

AC

DC

DC

Static Bypass

Rectifier Inverter

BypassSupply

MainsSupply

BatteryBank

• The output voltage is newly generated, independently from the input voltage.

• Voltage and frequency variations at the input are not present at the output.

• Heat losses are present in Rectifier and Inverter

OutputFilter

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Supply the load via the bypass circuit in order to prevent heat losses. This can be done only in case the bypass supply is in tolerance

AC

AC

DC

DC

Static Bypass

Rectifier Inverter

BypassSupply

MainsSupply

BatteryBank

Load

• Load is supplied via the bypass

• The rectifier keeps the batteries charged

• The inverter is switched off (no heat losses)

OutputFilter

ECO Mode

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Performance of ECO Mode

Simulation of transfer back to inverter

Bypass on/off

Inverter current

Inverter control

Output voltage

Fast Transfer to Inverter

< 2ms

• In case the bypass supply is out of tolerance the inverter will start immediately

• This transfer is done within 2 ms, which is more than sufficient for most loads

• Bypass supply voltage tolerance: +/- 10% (adjustable)

• Bypass supply frequency tolerance: +/- 5% (adjustable)

• Output filter provides mains filtering and power factor correction from 0.8 to 0.9 (dep. on load)

• Efficiency up to 98%

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RPA Redundant Parallel Architecture

RPA features

•Up to 4 units in parallel

•Any UPS able to be the logic leader

•Decentralized bypass

•No single point of failure

To critical load

LP Series is a cost effective and reliable UPS system, using proven technology

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

Utility Supply

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Interfacing Features

1x RS232 Serial Communication Port

4 Programmable potential free alarm contacts on terminals blocks

1x Emergency Power OFF contact

Optional: SNMP Interface Card (10/100Mbps

auto-select)

MODBUS RTU Interface (RS232 or

RS485)

Extended customer interface with 6

programmable pot. sree

contacts and Gen-On

contact

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Highlights

• Low Input Current THD (<8%)

• High Input Power Factor (>0.98)

• ECO Mode

• RPA with decentralized bypass

• Excellent output performance

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