Supply List of Main Developed Products
| 1958 | Developed window-type current transformer of error compensation method in patent no. 426098 "small capacity wound magnetic core current transformer." Released Japan's first small size, high precision "wound magnetic core window type current transformer" broken down by ampere turn. This set a trend. | 1959 | Started production of resin mold transformers. |
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| 1960 | Started production of 6kV resin mold current/voltage transformers. | |
| 1961 | Released resin mold wound magnetic core window type (square/toroidal) current transformer. | |
| 1962 | Started production of 6kV epoxy mold current/voltage transformers. | |
| 1963 | Developed 6kV epoxy mold current transformer withstand 75/150/300 times of current. | |
| 1964 | Constructed factory for epoxy mold. | |
| 1965 | Started supply 6kV, 1.15kV current/voltage transformers for Fucyu Works, TOSHIBA CORPORATION. | |
| 1966 | Developed 6kV window-type current transformer for high voltage bare conductor, supplied for Fucyu Works, TOSHIBA CORPORATION. | |
| 1967 | Accomplished supply of 3 hundred thousand units of magnetic core window type current transformer since introduction. | |
| 1968 | Established more epoxy molding system. Increased manufacturing capacity considerably. | |
| 1969 | Operated withstand current limit test of 6kV epoxy mold withstand current current transformer.(40/75/150/300 times) Established by proof that mechanical withstand current strength was greater than past products. Also, established by proof that mechanical strength of products(40 times) was more than tripled. | |
| 1970 | The Kansai Electric Power Company, Incorporated/Our standard products was firstly recommended for recommended system of 6kV mold type current/potential transformers. | |
| 1971 | Started supply 3.3kV voltage transformer for Oomika Works, Hitachi, Ltd. Supplied 6451 units by 1974. | |
| 1974 | Started supply 3.3kV voltage transformer with new type fuse for Oomika Works, Hitachi, Ltd. | |
| 1977 | Supplied high voltage pulse transformer for DC power transmission between Hokkaido and Honshu for Hitachi, Ltd. | |
| 1978 | Supplied current transformer with transient state characteristics for power system simulator of super high voltage transmission line for Shin-Shinano for Hitachi, Ltd. | |
| 1979 | Supplied pulse transformer of high frequency and high voltage for JT-60 （experimental fusion reactor）for Fucyu Works, TOSHIBA CORPORATION. | |
| Started development and supply new type 10kV neutralization voltage transformer for Oomika Works, Hitachi, Ltd. | ||
| Supplied 24000A epoxy mold bushing current transformer for Hitachi Works, Hitachi, Ltd. | ||
| Developed new type pulse transformer (waveform controlling element was ploughed in mold) and started supply for Fucyu Works, TOSHIBA CORPORATION. | ||
| 1980 | Supplied high voltage pulse transformer for converter system for Hitachi, Ltd. | |
| 1981 | Supplied high frequency and high voltage pulse transformer for fusion reactor JT-60 for Hitachi, Ltd. | |
| Developed and supplied prototype of 12.5kA 0.125S withstand current current transformer for current transformer for access to high voltage electricity for Japan Switchboard Industries Association, Japan Electric Association, and Aichi Electric Works Co., Ltd. Succeeded in passing withstand current test as first prototype in Japan. |
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| 1982 | Developed new type zero-phase-sequence current transformer (ZCT) with detector of phase error and started supply for Oomika Works, Hitachi, Ltd. | |
| 1983 | Developed 12000A large diameter epoxy mold bushing current transformer (inner diameter 535φ) and supplied Hitachi Works, Hitachi, Ltd. | |
| Supplied 1622 units of precise current transformers for 10kV for Tenaga Nasional Berhad, MALAYSIA. Supplied 631 units of voltage transformers for Aichi Electric Works Co., Ltd. | ||
| 1984 | Supplied 792 units of 20kV current transformers for Taiwan Power Company. Supplied 123 units of voltage transformers for Aichi Electric Works Co., Ltd. | |
| 1985 | Supplied 10kV current transformer with Hall element for Fucyu Works, TOSHIBA CORPORATION for linear motor at Miyazaki prefecture, Railway Technical Research Institute. | |
| 1986 | Supplied pole voltage transformer for zero-phase-carrier transmission and power transformer for Kokubu Works, Hitachi, Ltd. for Shikoku Electric Power Company, Incorporated. | |
| 1987 | Supplied ideal voltage transformer and reactors for power system simulation for Kokubu Works, Hitachi, Ltd. for Central Research Institute, The Kansai Electric Power Company, Incorporated. | |
| 1989 | Set cubicle type current transformer for access to high voltage electricity in series. | |
| 1990 | Developed high voltage pulse transformer for Shinano thyristor SVCC. Supplied for Hitachi Works, Hitachi, Ltd. and Fucyu Works, TOSHIBA CORPORATION. | |
| Developed 6kV reactor for surge clearing of distribution line. Supplied for JAPAN PRECISION INSTRUMENTS, Inc. | ||
| 1991 | Developed high voltage pulse transformer for linear motor at Yamanashi prefecture for Railway Technical Research Institute. Supplied Hitachi Works, Hitachi, Ltd. and Fucyu Works, TOSHIBA CORPORATION. | |
| Supplied high voltage pulse transformer for Okawachi adjustable-speed pumping-up hydroelectric power plant of The Kansai Electric Power Company, Incorporated and large current window-type current transformer for Hitachi Works, Hitachi, Ltd. | ||
| Developed special current transformer and pulse transformer for nuclear power plant. Supplied for Fucyu Works, TOSHIBA CORPORATION. | ||
| 1992 | Supplied large current window type current transformer of Oku-Mino power plant of CHUBU Electric Power Co.,lnc. for Hitachi Works, Hitachi, Ltd. | |
| Supplied 180 units (10 groups) of window type current transformers of Yacyreta hydro-electric power plant (Argentina) for Hitachi Works (Hitachi, Ltd.), Hama-Kawasaki Works(TOSHIBA CORPORATION), Kobe Works (Mitsubishi Electric Corporation). | ||
| 1993 | Developed #20 insulated transformer for 300MVA self-excited SVC and pulse transformer. Supplied for Hitachi Works, Hitachi, Ltd. and Fucyu Works, TOSHIBA CORPORATION. | |
| Supplied large current BCT of Kawagoe thermal power plant of CHUBU Electric Power Co.,lnc. for Hitachi Works, Hitachi, Ltd. | ||
| 1995 | Supplied large current current transformer and high voltage pulse transformer of Oku-Kiyotu pumping-up hydroelectric power plant of Electric Power Development Co.,Ltd (J-POWER) for Hitachi Works, Hitachi, Ltd. and Fucyu Works, TOSHIBA CORPORATION. | |
| Developed the world's first bushing current transformer with transient state characteristics for superconducting generator. Succeeded to measure first wave 70kA peak with error 0.5% for DC 100%. Supplied for Hitachi Works, Hitachi, Ltd. | ||
| 1998 | Developed #20 insulated multi-ratio current transformer. Passed and approved by Kokubu Works, Hitachi, Ltd. | |
| Developed precise bushing current transformer with large diameter for Ertan, China. Supplied for Ako Works, Mitsubishi Electric Corporation. | ||
| 1999 | Developed large current zero-phase sequence current transformer for EGAT, Thailand. Supplied current transformers and voltage transformers for 7.2kV and 0.72kV for power receiving and distribution control board for YASKAWA Electric Corporation. | |
| Developed 35000A bushing current transformer for Onagawa nuclear power plant. Supplied for Hitachi Works, Hitachi, Ltd. | ||
| Developed special current transformer and pulse transformer for Hamaoka nuclear power plant. Supplied for Fucyu Works, TOSHIBA CORPORATION. | ||
| 2000 | Started supply voltage transformer of extra high voltage in generator for Kobe Works, Mitsubishi Electric Corporation. | |
| 2001 | Started supply voltage transformer of extra high voltage in generator for Kokubu Kiki Engineering Co.,Ltd. | |
| 2002 | Developed insulated transformer for thyristor gate power source for 6.9kV. Started supply for Kobe Works, Fuji Electric Holdings Co., Ltd. | |
| Started study of Air-core Rogovsky coil. | ||
| Developed precise standard current transformer with wide-range. | ||
| Developed bare conductor window-type current transformer for 12kV and 7.2kV for common use. | ||
| 2003 | Accomplished supply of 3 hundred thousand units of magnetic core window type current transformer since introduction. | |
| 2005 | Developed track window type zero-phase sequence current transformer of super small size. | |
| Developed current transformer for 6/10kV with wide range. | ||
| 2006 | Developed 70kV multi current transformer for special high voltage for use in oil and for outside. | |
| Developed wide-range current transformer for 6kV. | ||
| Developed supporting insulator with high yield strength. | ||
| Developed window-type current transformer with low voltage and low cost. | ||
| Developed large current DC current transformer. | ||
| Developed 6kV voltage transformer for pole load break switch. | ||
| Developed standard current transformer for large current (40000A)（as national standard） |