Fuji Electric Systems Releases the World's First High-Voltage Drop/Dip Compensator Using Lithium Ion Capacitor

Fuji Electric Systems Co., Ltd. (President and Representative Director: Mitsunori Shirakura, hereinafter referred to as “FES”) announced today the release and immediate availability of its new high-voltage drop/dip compensator, 8000H series. With a lithium ion capacitor (LiC) being used as its energy storage device for the first time in the world, the new series has less environmental impact and a much smaller footprint.

As the use of IT equipment expands and the need for datacenter reinforcement increases due to demand expansion, it is increasingly required for operators of datacenters, which require large amount of electric power, to reduce their facilities' environmental impact or to backup electric power for the entire facility in case of an instantaneous voltage drop or blackout. Momentary voltage drops or blackout in plant also cause significant losses, especially to manufactures of semiconductors, LC displays, solar cells and other high-value-added products. These situations have traditionally been addressed individually through various measures, including installation of low-voltage uninterruptible power supplies (UPSs). Implementing and maintaining these measures individually, however, can be costly at large facilities. In addition, increased sophistication and automation of production processes have resulted in more production facilities that need to be protected against instantaneous voltage drops. In this backdrop, large scales of measures are required to backup electric power for the entire production facility.

To respond to these market needs, FES introduced in 2007 a high-voltage drop/dip compensator using lead battery which can cover from 15 seconds momentary voltage drops to up to 5 minutes short-time blackout. Lead batteries, however, had some drawbacks: They were large in size and required regular maintenance, replacement and disposal. There was also a strong demand from customers for devices that cover short-time power failures.

To address these problems and requirements, next-generation energy accumulation devices with higher-performance were required, and therefore FES has collaborated with FDK Corporation (President & CEO: Tozo Ono) and jointly developed a LiC module for high-voltage drop/dip compensator. LiC's larger energy density, which is twice or three times as that of conventional electric double-layer capacitors, allows for cutting the traditional size of capacitor boards by more than half. For examples, by applying a LiC module, a 10 seconds backup can be possible with the capacity board of the same size as that for 2 seconds backup.

(1)	Smaller footprint and better maintenanceability
	By using a LiC as energy storage device and employing the modular structure, a 60% reduction in footprint and a significant improvement in maintenanceablity, compared to our conventional high-voltage drop/dip compensator, have been achieved.
(2)	Less envrinmental impact
	The 8000H series' more efficient power consumption will result in a less ventilation capacity required for heat disposal. A LiC itself is also environmentally friendly since it primarily consists of an activated carbon material and the carbon material which is pre-doped with lithium ions, without employing heavy metal.
(3)	Higher efficiency and performance
	FES's proprietary, patent pending one-pulse charging method allows for an equipment efficiency of 9.3% during commercial power feeding. In addition, thanks to the 8000H series's quick blackout detection capability and high-speed semiconductor switches, the changeover performance has substantially been improved and an uninterrupted changeover (JEC-2433 Uninterruptible Power System, Class 2) has been achieved.
(4)	Long-time compensation
	The adoption of LiC allows the equipment to respond to the long-time power failure between 2 and 10 seconds. 10 seconds backup time allows for maintaining blackout during the time between an instantaneous voltage drop and a line changeover.
(5)	Maintenance-free (energy accumulation device)
	The adoption of long-life LiC allows for an extended energy accumulation device life, requiring no replacement for 15 years.

(1)	Green iDCs
(2)	Production lines for high-value added products such as semiconductors, LCs and solar cells

Rated output capacity: 2000kVA/1600kW　Note: Up to 6 units can be operated in parallel.
Input-output voltage and number of phases/wires: 6600V±10%, 3 phases/3 wires
Efficiency: 99.3% or greater (during normal operation)
Changeover time at power failure: less than 2 msecs or faster
Back-up time: 2 – 10 seconds

The product is immediately available.

Fiscal 2009: 12 sets (approximately 2 billion)
Fiscal 2012: 30 sets (approximately 5 billion)

Industry Plant Business Headquarters
Fuji Electric Systems Co., Ltd.
Tel. +81-42-585-6486