LP Series 400V CE
GE Consumer & Industrial
September 2004
Range
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•
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Digital Energy™ LP 33 Series UPS
10-20-30 kVA Power
400 VAC 50/60 Hz
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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
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Technical Description
Batt.Charger
Rectifier
IGBT Inverter
DC link +
Booster +
Battery bank
2x
Mains
DC Cap
LC
2x
filter
Booster -
DC link Batt.Charger
Through going neutral
• Neutral connection is required
• Two DC link voltages
• Two battery strings
• Booster is creating a regulated DC link
• Filtering is done by inductors and
capacitors
• Neutral is ‚‘through-going‘‘ (input neutral = output
neutral)
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Input voltage window
Extremely Wide Voltage Window
Less battery operations
Voltage
:- 25% +20%
Frequency
:+/- 10%
Input Frequency
+10%
Wider Range is
Better
+5%
Competition
-5%
-10%
Input
Voltage
-25%
-15%
+20%
208Vac
+10%
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Input performance
segnale
0.08
Harmonics Feedback
• Current THDi : <8%
• Power Factor : >0.98
0.06
0.04
0.02
0
-0.02
Advantages:
• No additional filters required
-0.04
-0.06
-0.08
0
1000
2000
3000
4000
5000
6000
7000
8000
9000
• Prevents need for oversized
GenSet
• Reduced cost for cabling and
fusing
Sinusoidal input current
waveshape (THD <8%)
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Energy Consumption
Efficiency: 91% (double conversion mode)
Bypass
Supply
Mains
Supply
Static Bypass
DC
AC
DC
AC
Rectifier
Inverter
Output
Filter
Battery
Bank
• 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
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ECO Mode
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
Bypass
Supply
Mains
Supply
Static Bypass
DC
AC
DC
Load
AC
Inverter
Rectifier
Output
Filter
Battery
Bank
• Load is supplied via the bypass
• The inverter is switched off (no heat losses)
• The rectifier keeps the batteries charged
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Performance of ECO Mode
Simulation of transfer back to inverter
Output voltage
Bypass on/off
Fast Transfer to Inverter
< 2ms
Inverter current
Inverter control
• 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
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
RPA features
• Up to 4 units in parallel
• Any UPS able to be the logic leader
• Decentralized bypass
• No single point of failure
Utility Supply
To critical load
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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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