Since system engineering became a popular subject to electrical equipment manufacturers in the latter half of 1950s, Fuji Electric has made efforts to develop and put to practical use the so-called system build-up technology that enables an entire plant consisting of many functional components to fulfill a function aimed at.
This paper describes the methodology of system engineering for our various automated systems and integrated information and control systems. Further, it refers to the present state and development of Fuji's internal infrastructure supporting the methodology and also to our view on the CASE activity considering future problems and possible solutions.

Fuji Electric has developed CASE and put it to regular use to make efficient engineering of control systems and to imporve the system quality for the past seven years. The CASE basically covers the range from basic system design, the headstream, to test and inspection, the downstream, and aims at the common use (unification) of design information (engineering databases) as well as at efficient section works. This paper describes its philosophy, approaches, in industries, future problems and prospects.

Fuji Electric has tackled the improvement and computerization of control engineering work by linking the whole processes to construct a CASE (Computer-Aided System and Software Engineering) system. The system include a combination of networks, host computers, and workstations as hardware. Software is modified to match specific engineering work in each field of industry on the basis of common tools such as a support tool for listing, documentation, and drawing and a support tool for linking data-bases. This paper introduces these common basic tools.

The unification of engineering for electrical equipment (E), instrumentation (I), and computer(C) systems in general industries has been promoted retaining a respective cultural inheritance of E, I, and C.
This paper describes engineering steps in the order of requirements analysis and requirements definition, system design, software design and making, and system testing, and also engineering support systems.

The control system of water treatment plants for water supply and drainage is a system into which electrical (E), instrumentation (I), and computer (C) control systems are unified. System engineering is the most important process to build an EIC-unified control system and is a significant factor of system quality. Fuji Electric built engineering support systems and has used them as tools to create high-quality systems and software efficiently. This paper introduces system engineering for water treatment plants and its support system CATS.

Demand for instrumentation engineering is showing a tendency to increase rapidly with the spread of distributed control systems, and machine support through engineering tools is playing a more important part. These tools grasp the cross section of engineering work. They realize user-freiendly drawing support using instrumentation loop diagrams, engineering information transfer by data linking between sections, and engineering support by reusing data. These support systems were efficiently realized on the basis of the CASE system developed by Fuji Electric.

The remote terminal unit (telecontrol unit) is an essential means of information communication for supervisory control and data acquisition (SCADA) systems and the data is used by the whole system. Therefore, such data being furnished from an order section to design/manufacturing/test sections in the form of a database will eliminate repeated work, reduce cost, and improve the whole system in quality. Our sections concerned made efforts to develop such a system and have nearly put it to practical use. This paper gives an outline of the system.

New integrated office automation (OA) has been developed from conventional individual OA by the state of arts workstations and progress in network technology.
Plant engineering departments of Fuji Electric introduced many workstations and has realized new integrated OA. The essential points were the network between the host computer and workstations, supporting systems, manager's will and worker's unanimous enthusiasm for OA. Thus the office work has been innovated with a satisfactory result.
This paper describes our process to the required integrated OA and its present status.

This paper introduces an outline of a new control unit for a load regulator (LR) developed by Fuji Electric. The unit can digitally process the function of a load regulator control panel that includes a voltage control relay used for stabilizing power supply to consumers, and is designed to have a compact construction. Improvements in operational functions are such that four voltage control patterns can be set and an automatic editor function for program setting time is adopted.

When power systems are planned and operated, improvement in reliability and economical efficiency is always demanded, which requires prodiction analysis and system diagnosis based on power system analysis technology. Among various system analysis tools, EMTP developed by BPA, USA, is internationally used as standard general-purpose program in the field of instantaneous transient phenomenon analysis.
Fuji Electric has used EMTP in many system analyses because of its wide use and multifunction. This paper introduces and example of its application to lightning surge, switching surge, and power converters.