Geometrical instruments
Patent
1983-12-19
1986-04-15
Weidenfeld, Gil
Geometrical instruments
339 18R, 339 19, 339113R, 339157R, 339176P, 339198G, 339218M, H01R 1300, H01R 13514, H01R 2122, H01R 900
Patent
active
045823839
ABSTRACT:
A terminal apparatus and a batch inserting type test plug for a horizontal type case drawer protective relay allows for easy measuring and testing of a plurality of poles. The terminal apparatus has an inspection window on a front surface of upper and lower terminal boards which allows visual observation of a short bar, a stopping board, and a triangular contact on an end of a contact piece in the terminal apparatus which allows one to visually inspect a short-circuit state of a current transformer secondary side of the terminal apparatus. The test plug has a plurality of electrode plates with conduction plates thereon, the electrode plates being arranged in a line so that a width line of the electrode plates interconnecting the conduction plates is perpendicular to the line of the electrode plates so that a length of the test plug handle is compact. Also, a plurality of terminal knobs are arranged in a zigzag pattern so that an arrangement order of the electrode plates can easily be determined visually.
REFERENCES:
patent: 1718529 (1929-06-01), Coldwell
patent: 3692966 (1972-09-01), Lancaster
patent: 3737833 (1973-06-01), Jerominek
patent: 3884544 (1975-05-01), Lundergan et al.
patent: 3930706 (1976-01-01), Obuch et al.
Relay Test System Combitest (catalogue RK 92-11E) Jul. 3, 1975.
Draw-Out Relay-Case Series 2, Pamphlet 1359, pp. 7-9.
XRT Type Test Plug, Toshiba, KSA 61126, 1975.
TP Type Test Plug, Hitachi ER-231, p. 144.
Hara Kuniyoshi
Jo Toshitaka
Mizuta Koichi
Yamamoto Hiroshi
Bishop Steven C.
Mitsubishi Denki & Kabushiki Kaisha
Weidenfeld Gil
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