Test area perimeter alarm and out-of-limit power-off device and method

Abstract

The invention relates to a test area perimeter alarm and out-of-limit power-off device and method, and belongs to the technical field of power transformation test equipment. According to the technicalscheme, a main air switch (1) is connected with a rotary knob switch (4) through a first alternating current contactor (2) to form a starting circuit; a switching power supply (5), a travel switch (6) and a buzzer (7) are connected to form an alarm circuit; an infrared grating correlation detector (8), a first intermediate relay (9), a second intermediate relay (10) and a second alternating current contactor (3) are sequentially connected to form a power-off circuit; the infrared grating correlation detector, the first intermediate relay and a reset button are connected in sequence to form apower-off holding circuit; the starting circuit is connected with the alarm circuit, the power-off circuit and the power-off holding circuit. When a high-voltage test is carried out, a fence door is opened to give an alarm, a test power supply can be automatically powered off regardless of entering / leaving a test site, the test is forcibly terminated, power supply can be recovered until the resetbutton is pressed down, and the safety of field personnel is ensured.

Description

technical field [0001] The invention relates to a device and method for alarming at the perimeter of a test area and breaking power when the limit is exceeded, and belongs to the technical field of substation test equipment. Background technique [0002] According to the substation safety regulations, permanent barriers or fences should be set up in special places for high-voltage tests, and no one is allowed to enter or leave the test place during the test. However, due to the weak safety awareness of some personnel, habitual violations occur from time to time. During the test, there are other people who open or climb over the permanent fence, and enter the test site in violation of regulations and accidentally touch the live equipment, resulting in personal injury or death; operation, a serious violation of safety regulations. Contents of the invention [0003] The object of the present invention is to provide a kind of test area perimeter alarm and over-limit power-of...

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