Contact resistance monitoring alarm device of contact
A technology for monitoring alarm device and contact resistance, applied in the direction of alarms, electrical transmission signal systems, instruments, etc., can solve problems such as large contact resistance, equipment failure, contactor contact burnout, etc., to achieve simple structure, low cost, avoidance of The effect of equipment failure
Pending Publication Date: 2020-11-13
SOUTHERN POWER GRID PEAK LOAD & FREQUENCY REGULATION GENERATING CO LTD
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Problems solved by technology
[0002] At present, in some industrial automatic control circuits, relay contacts or contactor contacts are used as the conditions for starting equipment. Whether these contacts are in good contact cannot be monitored, and equipment inspectors cannot directly find out that the contact resistance of these contacts is abnormal. When the startup fails, the contact resistance of these contacts can be found to be very large; in addition, during the operation of the equipment, the contact resistance of multiple contacts of the contactor after the action cannot be monitored, and only when the load voltage imbalance alarms and stops , it can be found that the contact of the contactor has been burned seriously; these two situations are the main reasons for the failure of the equipment
Method used
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Embodiment Construction
[0014] The present embodiment will be described in detail below in conjunction with the accompanying drawings.
[0015] Such as Figure 1 to Figure 3 As shown, the contact resistance monitoring and alarm device for contacts includes a box body 1 , an alarm module, a power supply module, a monitoring module, a fixed connecting piece 4 and a movable connecting piece 5 . The power supply module adopts a 23A type 12V battery BAT. The box body 1 is provided with a battery box 6. The battery BAT is installed in the battery box 6. The alarm module is composed of a speaker 2 and an indicator light 3 connected in parallel. The speaker 2 and the indicator light 3 are independently installed on the Box 1.
[0016] Such as image 3 As shown, the monitoring module includes a first resistor, a second adjustable resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a voltage selection switch 8, a diode D, Capacitor C, firs...
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The invention discloses a contact resistance monitoring and alarming device of a contact. The device comprises a box body and an alarm module installed on the box body. The device further comprises apower module, a monitoring module, a fixed connecting piece and a movable connecting piece. The power module and the monitoring module are installed in the box body, the monitoring module and the alarm module are electrically connected with the power module, the fixed connecting piece is installed on the upper side of the box body and electrically connected with the monitoring module, the movableconnecting piece is located on the upper side of the box body and electrically connected with the monitoring module through a connecting wire, and the monitoring module is electrically connected withthe alarm module. During monitoring, the fixed connecting piece is electrically connected with one end of a monitored contact, and the movable connecting piece is electrically connected with the otherend of the monitored contact. The device is used in an equipment control loop, can give an alarm when the contact resistance of the contact is increased, and reminds maintenance personnel to replacethe contact in time.
Description
technical field [0001] The invention belongs to the field of industrial automatic control, and in particular relates to a contact resistance monitoring and alarming device for contacts. Background technique [0002] At present, in some industrial automatic control circuits, relay contacts or contactor contacts are used as the conditions for starting equipment. Whether these contacts are in good contact cannot be monitored, and equipment inspectors cannot directly find out that the contact resistance of these contacts is abnormal. When the startup fails, the contact resistance of these contacts can be found to be very large; in addition, during the operation of the equipment, the contact resistance of multiple contacts of the contactor after the action cannot be monitored, and only when the load voltage imbalance alarms and stops , Only then can it be found that the contactor contact burnout has been very serious; these two situations are the main causes of equipment failure....
Claims
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IPC IPC(8): G08B21/18G08B7/06
CPCG08B7/06G08B21/185
Inventor 胡道平莫理高菘刘永辉姚明亮张勇张龙浩柳本林张树保付恩狄陈远政许兴贵
Owner SOUTHERN POWER GRID PEAK LOAD & FREQUENCY REGULATION GENERATING CO LTD