Selection of 400V DC Sites

What makes 400VDC
to an attractive power
alternative for data
centers?
2014-09-04
Data Center Forum, Moscow
Marek Szpek
Business Development EMEA
© Emerson Network Power AB 2012. All rights reserved throughout the world. The
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resulting from use of this information or for any errors or omissions. This information in
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Selection of 400V DC Sites
Syracuse University
Netpower Labs AB
380V DC
(several sites)
350V/380V DC
Nextek
380V DC
Green.Ch
380V DC
France Telecom
380V DC
SAP
380V DC
France Telecom
380V DC
Intel
380V DC
NTT Group
(several sites)
380V/400V DC
Univ. California
380V DC
Several Japan Sites
Clustered
Systems
300V/350V DC
380V DC
North American
Telecom
Duke Energy
China Mobile
380V DC
380V DC
380V DC
Visa
Telecom
Data Center
China Telecom
380V DC
Buildings / Microgrids
European
Telecom
OEM
380V DC
380V DC
Emerson power equipment
© 2014 Emerson Network Power Intellectual Property. All rights reserved
2
IBM
Singapore
240V/380V DC
380V DC
Vendor participants include:
HP, IBM, EMC, Fujitsu, Hitachi, NEC
Availability in 400VDC and AC-UPS
 Mains failure; battery is connected directly
to the load
 Mains failure; Battery supplies power only if
 28 x 12V battery blocks
 40 x 12V battery blocks
 Simple control scheme,
only one parameter (DC voltage)
 Complex control scheme; voltage, frequency,
phase, waveform
 Battery provides a hard source for safe &
reliable fault clearing (high batt. current at
short circuit =short clearing time)
 Soft source makes fault clearing less effective
(longer clearing time at short circuit due to
lower inverter output current vs. batt. curent)
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no malfunction on inverter or static switch
3
Basic differences in DC and AC
mind set and approach
DC-UPS
AC-UPS
Load
AC
Load
AC
- 2N (single big system)
- Grid/Diesel = Safety Line
- By-pass to AC at fail or maintenance
- Redundancy at maintenance/failure in focus
- N+1
- Battery = Safety Line
- Any unit to be replaced in on-line operation
- Availability in primary focus
4
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Basic UPS Module configurations
Source:
© 2014 Emerson Network Power Intellectual Property. All rights reserved
5
BICSI, Class F1 and Class F2 with DC-UPS
Class F1 – Single Power Path
Class F2 – Redudant Components
6
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BICSI, Class F3 and Class F4 with DC-UPS
Class F3 – Dual Path: Concurrently Maintainable
Class F4 – Dual Path: Fault Tolerant
7
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Cascade Effect in Power
Consumption

Power Consumption: 100 W System
IT load
Load
Load
100
W
Total
275
W
Room
cooling
system
70W
Serve
r fans
15W
UPS
+PDU
20W
PUE =
Source: Intel Corporation
PSU
50W
Total Facility Energy
IT Equipment Energy
VR
20W
(12V/5V,<5V)
=
275W
185W
= 1.5
8
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8
End-to-end efficiency comparison
230VAC
Server
AC
AC-UPS efficiency 50% load, no isolation transf.
a. Double Conversion, market average
92-94%
b. Emerson Trinergy, Double Conversion op. eff. 95,6%
Total distribution,
average efficiency 98%
End-to-end efficiency, double conversion: Market Average
Emerson Trinergy
AC/DC efficiency,
market average 90%-93%
0,93 x 0,980 x 0,915 = 83,4%
0,956 x 0,980 x 0,915 = 85,72%
DC
(400V)
DC-UPS efficiency 96,5%
(50% load, mains isolated)
End-to end efficiency
Total distribution average eff. 99%
DC/DC efficiency 91%-95%
0,965 x 0,99 x 0,93 = 88,85%
Total saving 5% - 8% with 400VDC (cascade effect, mains isolation)
9
Emerson Network Power, Energy Systems; Proprietary and Confidential Information.
N+1 redudancy in DC attractive
alternative to 2N
-
High overall availability
-
Power available even if single unit (rectifier,
controller, distribution c.b.) fails
-
Dual power distribution path A and B
-
If controller fails the rectifiers operate at
their default setting
10
Emerson Network Power, Energy Systems; Proprietary and Confidential Information.
A
B
More simple site lay-out with 400VDC
11
Emerson Network Power, Energy Systems; Proprietary and Confidential Information.
StarLine DC Solutions, 400VDC
Busway from Universal Electric
415V AC @ 400A = 287kVA/258kW (0.9pf)
380V DC @ 400A = 152kVA X 2 = 304kVA/Kw (1.0pf)
12
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400V Power Chain Infrastructure
Availability
DC Power
System
DC Load
Breaker
Emerson
ABB
ABB
Distribution
Busway
Rack PDU
Cord
Connector
API Technologies
Carling
Univ Elec /
Starline
ServerTech
Anderson
Power Products
Eltek
Schneider
PDI*
Echola Systems*
Hubbel
Delta*
Nader
Eaton*
Delta*
Siemens
Siemens*
Fujitsu*
ICT Load
HP – DL, ML, SL rack
mount servers
IBM – some X and Z
Rong Feng / Delta series; additional
products underway
Fujitsu*
Juniper – EX.. And
GFX.. switches
Ericsson* –
development underway
* Pre-production
products or in
development
Cisco* – UCS platform
compatibility underway
400V DC Ecosystem Has Progressed
Significantly Over Last Year
13
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400V DC Server Availability
 HP
‒
HP sees 400V DC market potential and is investing in compatible products
‒
HP now offers 400V DC input in their common slot power supply for rack mount devices:
ProLiant (DL, ML, SL), Storage, etc; support for c7000 blade by end of 2014
‒
Next generation (G9) of products will also include 400V power supplies
(500, 800, and 1200W) for 45+ Server, Storage and Switch products
 IBM:
‒
Some X and Z series available today; Flex blade center support and rack mount common
slot power supplies in 2014
 Juniper: EX and QFX series top of rack switches with 850W common slot power available
 Huawei: working on complete IT portfolio
 Cisco: UCS platform compatibility in development
 NEI: catalog products available today, 1U and 2U servers
 Supermicro: 2 servers models available for trial
 Dell: early stages of 400V investigation
Increased Availability of 400V DC Loads
14
© 2014 Emerson Network Power Intellectual Property. All rights reserved
120kW 400V DC Power System
Power
Module
Bulk Output
Distribution
to feed
A and B
Distribution
Panels or
other Output
Controls
Distribution
Module
Highlights:
 120kW base system; bulk or integrated output
 97% peak efficiency
 15kW hot-swappable rectifier modules
 High-Resistance Midpoint Ground
configuration
 cUL/CE 60950 Listed
 Designed to meet NEBS
A
Features:
 Expand with additional 120kW modules
(2nd phase)
 Available battery cabinets
 Top or bottom rack cable entry
 2000mm x 600mm x 1100mm footprint
B
B
Rectifiers
AC Input
15
© 2014 Emerson Network Power Intellectual Property. All rights reserved
400V DC Summary
•
400V DC power reduces complexity and increases availability
compared to traditional AC power

Lower TCO
– N+1 good enough vs. 2N in many cases (fault tolerant modularity)
– No bypass/STS/paralleling equipment
– No UPS output switchboard

Higher overall efficiency
•
400V DC Eco-system continues to develop
400V DC Power Technology
Improves Power Architectures in Data Center & Telecom Sites
16
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