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August 1, 2014
NGK INSULATORS, LTD.

Pharmaceutical Manufacturer Starts Operation of NAS Battery System for Concurrent Use as an Instantaneous Voltage Sag Countermeasure

NGK INSULATORS, LTD. (President Taku Oshima; Headquarters: Nagoya, Japan) announced today the start of operation of a NAS battery system for energy storage, which was supplied to the Hikone Plant (Hikone, Shiga Prefecture) of pharmaceutical products manufacturer Maruho Co., Ltd. on an order from Kanden Engineering Co.

The newly operated system is a NAS battery system equipped with a function of an emergency power source during a power outage or instantaneous voltage sag. The system has a rated output of 3,000 kW, and a rated capacity of 21,600 kWh, having a 7.2 hour discharge period, and is capable of supplying instantaneous output at 3,000 kW.

Pharmaceutical products are directly involved with human health, and require a production system that can maintain high quality and a stable supply. If the production line of a pharmaceutical plant stops because of an instantaneous voltage sag in the electrical grid due to a lightning strike or some other cause, the products may be rendered defective, causing a large amount of loss as well as having a potential impact on supply.

The NAS battery system for concurrent use as an instantaneous voltage sag countermeasure continuously operates as a load balancer by storing electricity during the night and supplying it during the day to enable reduction of maximum power (peak load shaving). At the same time, by constantly retaining a certain level of battery capacity, it can also serve as a backup power source during a power outage or instantaneous voltage sag. The system can supply power instantaneously (within 0.005 seconds) when an instantaneous voltage sag occurs, ensuring that the production line does not stop. NGK has delivered NAS battery systems for concurrent use as an instantaneous voltage sag countermeasure to around 30 sites, such as electronic component manufacturing plants, with a total capacity of around 60,000 kW. This strong track record and reputation for reliability led to the system being adopted at the Maruho Co., Ltd. plant.

Features of the NAS Battery System for Concurrent Use as an Instantaneous Voltage Sag Countermeasure

1) While continuously performing load balancing operation, the system can simultaneously supply electric power with high operational reliability against an instantaneous voltage sag, even in case of multiple lightning strikes.


2) The system has a long expected service life of 15 years, and enables a significant reduction in CO2 emissions as a replacement for a diesel generator or cogeneration emergency power supply.

System Overview

The NAS battery of the Maruho Co., Ltd. Hikone Plant

The NAS battery of the Maruho Co., Ltd. Hikone Plant

Installation site: Maruho Co., Ltd., Hikone Plant (Hikone, Shiga Prefecture)

Rated output: 3,000 kW (Instantaneous output of 3,000 kW)

Rated capacity: 21,600 kWh (7.2 hour discharge period)

Application: Instantaneous voltage sag countermeasure, emergency power supply, electricity load balancing

Operation start: July 2014


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