METHOD AND APPARATUS FOR REMOTE COAL MINE LEAKAGE TEST

摘要

Provided are a method and apparatus for remote coal mine leakage test. The remote leakage test method comprising: installing and connecting a leakage test device (3) at the a control switch (2) located at the most distal end of a coal mine power line (5); a leakage detection and protection device (1) connecting the leakage test device (3) via the coal mine power line (5) and providing it with a detection circuit for detecting whether remote leakage has occurred; generating a grounding current flowing through the coal mine power line (5) by controlling the grounding of the leakage test device (3); the leakage detection and protection device (1) detecting the grounding current, and enabling a leakage protection relay (KA) to operate, so as to cut off the coal mine power line (5); and detecting the coal mine power line (5) or manually observing an indication lamp (HL), so as to determine whether the remote leakage test is successful. The coal mine remote leakage test device and method are safe, convenient and time-saving.

主权项

1. A method for remote coal mine leakage test, wherein:
a leakage test device (3) is disposed at a control switch (2) located at the most distal end of a coal mine power line (5); said leakage test device (3) located at said control switch (2) is connected with a leakage detection and protection device (1) through said coal mine power line (5), and is provided with a detection circuit by said leakage detection and protection device (1) for detecting whether a remote leakage occurs; said leakage test device (3) is controlled to be grounded to produce a grounding current passing through said coal mine power line (5); on the condition that said grounding current is detected by said leakage detection and protection device (1), a leakage protection relay (KA) is activated to cut off said coal mine power line (5); detecting the coal mine power line or observing an indication lamp by a remote leakage test operator to determine whether the remote leakage test is successful.