Title:
METHOD AND DEVICE FOR EXECUTING REMOTE ENERGIZATION TO ELECTRIC LOAD
Document Type and Number:
Japanese Patent JPS58201427
Kind Code:
A
Abstract:
For remote feed of a group of electrical users connected in series in a closed loop, a dc voltage is applied to the loop in a polarity opposite to a normal feed voltage in order to determine whether interruptions are present, even if a human body is shunting the loop at the interruption. Each of the users has a diode connected in parallel to its inputs which is polarized such that when the test voltage for creating a test current is applied, substantially only a resistance of the loop is measured exclusive of the users. A loop resistance is determined from a measurement of the test current and the loop resistance is compared to a test resistance set lower than a human body resistance. If the loop resistance is lower than the test resistance, then normal remote feed current is applied to the loop since no interruptions exist. If the loop resistance exclusive of the users is of a same magnitude or greater than the human body resistance, then shunt arms are employed in the loop comprised of resistors and diodes to lower the loop resistance during feed of test current so as to reliably detect whether an interrupt location is present.
Inventors:
ARUFUREETO TSUIIKURAA
GERUHARUTO MUJIRU
GERUHARUTO MUJIRU
Application Number:
JP7231883A
Publication Date:
November 24, 1983
Filing Date:
April 26, 1983
Export Citation:
Assignee:
SIEMENS AG
International Classes:
H04B3/44; H04B17/40; (IPC1-7): H04B3/44
Attorney, Agent or Firm:
Toshio Yano