Schneider Electric ITB
Future Trends : The Transformerless UPS
Presented by
Yam Hong - Asean Business Development
Hong.Yam@schneider-electric.com
Phone : 6324 6588
Hong.Yam@schneider-electric.com
10 Ang Mo Kio Street 65,
#03-06/10 Techpoint Building
Singapore, Singapore 569059
Agenda
● Market Drivers for UPS Solutions
● Current and future trends of UPS Technology
● Transformerless UPS attributes
● Advantages of Transformerless UPS design
● Transformer based UPS Vs Tranformerless UPS
● Capex, Opex and Installation costs savings
● The new Galaxy 300 UPS
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Market drivers of UPS Solutions
TCO – Capex & Opex
Electrical Performance –
Eff, Thdi, pf
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Flexibility – Scalability,
footprint
3
UPS : Current Technology
Harmonics Current Reinjection
(THDi) Upstream
● Double-Bridge Converter regulates
by controlling firing angle of SCRs
AHF
● Anti-Harmonics filter (AHF) needed to
achieve < 5% THDi (IEEE 519 Stds)
● Both rectifier / inverter operating in
“Buck” mode thus transformer
needed to step-up voltage
Transformer needed to step-up
voltage
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UPS : Current Technology
Input Phase Shift
12-Pulse Current Waveform
Transformer
Output Transformer
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6-Pulse Current Waveform
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PFC Charger : Input Characteristics
Low Harmonics Reinjection
& pf = 1
800 Vdc Bus
Buck-Boost Converter
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Natural shift to transformerless topology
with UPS systems still providing high quality
power to loads
● IGBT bipolar transistors enable voltage control
& very short switching (nanoseconds from
10%-90% of threshold) in compact size
Dualpack:
● MGE uses 5th generation “Sixpack” IGBTs –
containing 1000s of transistor cells; most
compact & integrated to date
3 packages of 2 IGBT
● Low to medium power devices can operate at
16kHz with output efficiencies > 90%.
● For higher power equipment, frequency limited
to reach efficiencies ≤94%.
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Sixpack: 6 IGBTs with
integrated temperature
sensor
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Heat Pipes Technology
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Advantages of transformerless UPS:
Mechanical
● High Density transistors/device means newest IGBT’s offer
extremely compact form factor compared to early control
devices
● No transformer enables to reduce weight and size
● Enables smaller package overall
1000 mm
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700 mm
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Advantages of transformerless UPS:
Performance
● Greater regulation flexibility accommodates wider range of input
voltages.
● Improved electro-magnetic compatibility (EMI)
● Improves compliance with Generator set :
● limits input current at Generator start-up
● Input power factor close to 1 :
=1
●No reactive power or capacitive current
●smaller sizing for genset
● Combination of transformerless designs with IGBT technology &
latest output filters achieves industry’s highest efficiency
● UPS battery isolated from DC bus thanks to independent charger –
protecting battery from non-linear load disturbances
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Transformerless UPS reliability
● Direct thermal IGBT control results
from integrated temperature sensors
placed directly in rectifier & inverter
bases
● If fault is detected, UPS sets-off alarm
and can switch to bypass input
without interruption
● Significantly reduced component
count & integrated control card
eliminates numerous cables and
connections that can cause faults
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Doc. Semikron
Integrated
Temperature
sensor
11
New Transformerless 3-Phase Designs
Offer Many Advantages – so what?
Improved performance
Minimize components count
Little or no electromagnetic
interference
Minimized footprint / weight
Easy neutral grounding
MGE: among the first UPS
manufacturers to design
transformerless system
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Transformerless UPS – OPEX Savings & ROI
Table: Unitary UPS at full load with output PF = 0.8:
250
300
400
500
kVA
kVA
kVA
kVA
/
/
/
/
200
240
320
400
kW
kW
kW
kW
Efficiency
MGE
90G7K
NET
93.8% 92.0%
93.9% 92.5%
93.7% 92.5%
94.0% 92.5%
Energy
savings
1 year
Energy
savings
5 years
2 920 €
2 710 €
3 100 €
4 840 €
14 600€
13 550 €
15 500 €
24 200 €
Formula:
Annual energy saving = Pu x
(1/ηc - 1/ηSchneider) x H x C
Pu = kW at UPS output
ηc = 90-NET efficiency
ηSchneider = Galaxy 7000 efficiency
H = number of hours in 1 year
(8760 hours)
C = kWh price = 0.08 €
Table: Unitary UPS at 50% load with output PF = 0.8:
250
300
400
500
kVA
kVA
kVA
kVA
/
/
/
/
100
120
160
200
kW
kW
kW
kW
Efficiency
MGE
90-NET
G7K
93.0%
91.5%
94.2%
92.0%
94.0%
92.0%
94.0%
92.0%
Energy
savings
1 year
Energy
savings
5 years
1 240 €
2 130 €
2 590 €
3 240 €
6 200 €
10 650 €
12 950 €
16 200 €
in
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Note : The OPEX increases significantly with parallel installation.
Additional savings in cooling energy not factored in above calculations.
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Transformerless UPS - Lower Capex & Installation Costs
Low input current for right sizing of the different components of the installation
Thanks to IGBT Charger, MGE Galaxy 7000 has lower input current
A high input current has an impact on the dimensioning of the equipment in the electric
installation:
Cable over-sizing,
Genset over-sizing,
Transformer over-sizing,
Circuit-breaker over-sizing.
Example for cable. The table below shows the cable size recommended by Chloride and
Schneider:
250 kVA
300 kVA
400 kVA
500 kVA
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MGE Galaxy 7000
1 x 150 mm²
1 x 240 mm²
2 x 150 mm²
2 x 240 mm²
90-NET
2 x 120 mm²
2 x 180 mm²
2 x 240 mm²
5 x 120 mm²
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Transformerless UPS – Smaller Footprint & Less Weight
UPS footprint without battery:
250
300
400
500
kVA
kVA
kVA
kVA
MGE Galaxy
7000
1.20 m²
1.20 m²
1.20 m²
1.54 m²
90-NET
1.39
1.39
1.39
1.73
m²
m²
m²
m²
Delta
G7K / 90-NET
1.08
1.08
1.08
1.12
Larger footprint Waste of space
Power density:
250
300
400
500
kVA
kVA
kVA
kVA
MGE Galaxy
7000
187 kW/m²
225 kW/m²
300 kW/m²
292 kW/m²
90-NET
144
173
230
231
kW/m²
kW/m²
kW/m²
kW/m²
Delta
G7K / 90-NET
1.30
1.30
1.30
1.26
For MGE Galaxy 7000, more kW in the same footprint
Weight:
250
300
400
500
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kVA
kVA
kVA
kVA
MGE Galaxy
7000
960 kg
960 kg
1100 kg
1470 kg
90-NET
1860
1860
2095
2495
kg
kg
kg
kg
1
Delta
G7K / 90-NET
1.94
1.94
1.90
1.70
k
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ce
a
sp
$2
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Symmetra® PX - Ultra Hi-Efficiency UPS
500kW of High-Efficiency
475kW
450kW
425kW
400kW
375kW
350kW
325kW
300kW
275kW
250kW
225kW
200kW
175kW
150kW
125kW
100kW
75kW
50kW
25kW
Scalable Power Protection
f
Ef
Schneider Electric
c
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t
p
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!
%
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Proven & Unmatched
45 years of experience
Silcon
SYPX
SUVT
SYMW
Galaxy 7000
●8th generation of
three-phase UPS
G 6000
G5000
PW
EPS
2000
Alpes 3000
Alpes 4000
MG 60
60ies
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70ies
80ies
90ies
2000
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Introducing the new MGE
Galaxy 300
Effective 3-Phase Power protection against downtime and Data loss
“Simplicity you can trust”
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MGE Galaxy 300 Applications
400V (10-40 kVA 3:3) and (10-30 kVA 3:1)
Commercial buildings
Facilities
Banks
Hotels
Telecom
Wireless communication
Mobile and fixed telephone
infrastructure
Radio and TV broadcasting
MGESchneider
Galaxy 300}
Electric
Small IT environments
Data storage equipment
Network equipment
Computer room equipment
Industrial environments
Manufacturing equipment
Control automation
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MGE Galaxy 300
Specifications summary
3:3 and 3:1 UPS
Two enclosure sizes from 10kVA to 40kVA
Parallel redundant capable (up to 2)
Double conversion on-line
Input power factor correction: >0.98 at load >50%
Output power factor 0.8
Built-in batteries
Voltage Tolerance : +/- 20%, (340 – 477V) full load
Frequency Tolerance : 45 – 65Hz
Efficiency : up to 93% @ full load
Input ITHD < 7% at full load
Output VTHD < 2% linear, < 5% non-linear
Overload capacity
125% for 2 minutes
150% for 60 seconds
1000% 500ms in bypass mode
UPS classification VFI-SS-112
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Narrow enclosure
400mm Width
Available sizes
10kVA, 15kVA,
20kVA (3:3)
Wide enclosure
500mm Width
Available sizes
20kVA (3:1),
30kVA, 40kVA
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MGE Galaxy 300
Summary
Effective three phase power protection against downtime and
data loss for mission critical applications
● Optimized footprint - narrow tower or wide tower depending on load requirements
● Double conversion on line topology guarantees consistently high level of power quality and availability
with permanently corrected power and instant transfer time
● Parallel capability up to 2 units for redundancy
● Fast charging capability reduces battery recharge time, and protects battery against damage caused
by deep discharge
● Full integrated bypass and simple interface with step-by-step wizards for setup or maintenance
● Low cost of acquisition designed to provide an optimized price/performance ratio, with a number of
features carefully selected to optimize both performance and cost level
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“Simplicity you can trust”
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Transformerless : UPS of the Future
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Conclusion
● Transformerless UPS systems from Schneider offer these advantages:
● Highest efficiency for lower cost of operation
● Adaptation to all distributed network types over a wide voltage range
● Enhanced compatibility with generator sets
● Exceptional output performance whatever the load type – including new
generation non-linear capacitive loads
● A compact size that easily fits into a variety of customer’s infrastructures.
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Helping people to make
the most of their energy
Thank you
Hong.yam@schneider-electric.com
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Compatible to ALL Architecture, Safety & Earthing Standards
Normes
Construction et sécurité
CEI 62040 1-2 / CEI 60950
Performances et topologie
CEI 62040-3 / EN 62040-3
CEM immunité
CEI 61000-4-2 / EN 62040-2 niveau 4 (décharges électrostatiques : 15
KV air, 8 kV contact)
CEI 61000-4-3 / EN 62040-3 niveau 3 (champs électro magnétiques
rayonnés : 10 V/m)
CEI 61000-4-4 / EN 62040-2 niveau 4 (transitoires rapides : 4 kV sur
câbles secteur)
CEI 61000-4-5 / EN 62040-2 niveau 4 (onde de choc forte énergie : 2 kV
couplage entre lignes
CEI 61000-4-6 / EN 62040-2 niveau 3 (immunité conduite : 10 Veff sur
câbles secteur)
CEI 61000-4-8 / EN 55024 niveau 4 (immunité rayonnée : 30 A/m)
CEM émission
CEI 62040-2 : C3 distribution contrôlée en standard / C2 classe A en
option
Harmoniques
CEI 61003-2 / CEI 61003-4
Conception fabrication
ISO 14001 / ISO 9001
Certification et marquage
CE / LCIE
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Transformer Vs tranformerless design
Phenomena at the UPS level
Phenomena
Transformer topology
How to ground the neutral at the output of the UPS ?
to reduce the potential between neutral and
ground)
It is forbiden to ground the neutral
WITHOUT total galvanic isolation : the
neutral cannot have 2 different
references to earth.
Then, we need to implement an AC
by-Pass transformer. Its neutral is
connected to the inverter transformer
neutral, both being grounded to a
unique earth.
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Transformer Vs tranformerless design
Phenomena at the UPS level
Phenomena
Transformerless topology
How to ground the neutral at the output of the UPS ?
to reduce the potential between neutral and
ground)
..
..
(1)
.
With a unique output transformer, there is a total galvanic isolation and the neutral can be
grounded.
Conclusion : same methodology needed as with transformer based UPS : add 1 transformer
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