Load indicating socket tester

Details Load indicating socket tester Load indicating socket tester

1992-09-02

1994-11-01

Snow, Walter E.

Electricity: measuring and testing

Testing and calibrating electric meters

324556, 324133, G01R 104

Patent

active

053610261

ABSTRACT:
A load indicating socket tester includes a base and an annular sidewall. A plurality of pairs of line and load terminals are mounted in and extend outward from the base for removable insertion into electrical contact with jaw terminals in a watthour meter socket. A cover closes an open end of the side wall of the housing and has fuses, lamps, an amp meter, and a lamp test switch mounted thereon. The fuses and lamps are preferably provided in pairs and electrically connected with the lamp test switch such that the switch, when in a first position, connects each lamp in parallel with one of the fuses and, when in a second position, electrically connects each lamp in series with one of the fuses to test the operation of each lamp. A current transformer is mounted within the housing and detects the current drawn by a load when the socket tester is mounted in a watthour meter socket. The output of the current transformer is connected to the amp meter to enable the load current to be visibly displayed externally of the cover of the socket tester.

REFERENCES:
patent: 3579100 (1971-05-01), Lauver
"Ekstrom Single Phase Meter Socket Tester Type S-120", Bulletin 9928, May 1, 1980, Revised Jun. 1985.

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