Detection method and detection device for delay switch with fire fighting or centralized control function

Abstract

The invention relates to the field of low-voltage electrical appliances, in particular to a detection method and a detection device for a delay switch with a fire fighting or centralized control function. According to the detection method, a fire fighting or centralized control terminal Ct of a delay switch is connected with a null line N, a load line terminal LAt of the delay switch is connectedwith the null line N through a load unit, a live line terminal Lt of the delay switch is connected with a live line L, and a null line terminal Nt of the delay switch is connected with the null line Ndirectly or is connected with the null line N through the load unit, in order to make the delay switch turned on and off repeatedly. The detection method is simple in steps and can be used to accurately detect the functional quality of a delay switch. The detection device has a simple structure and can be used to accurately detect the functional quality of a delay switch.

Description

technical field [0001] The invention relates to the field of low-voltage electrical appliances, in particular to a detection method and a detection device for a time-delay switch with a fire-fighting or centralized control function. Background technique [0002] In daily life, people often use delay switches triggered by sound and light, infrared, and touch. With the improvement of people's safety requirements, delay switches often have the functions of fire protection and centralized control to force the load to light up. 4. Delay switch products with fire protection or centralized control functions in four-wire system are often damaged and fail to function after long-term use, which may seriously cause the entire unit power grid to fail to operate normally. [0003] In practical application scenarios, the delay switch with fire protection or centralized control function controls whether the load is working or not by controlling the live wire of the load, and the fire prote...

AI Technical Summary

Problems solved by technology

In this way, the fire protection or centralized control terminals of all delay switches on the entire line are connected to the fire centralized control line at the same time. When the fire control line is not powered, all loads (such as incandescent lamps, etc.) On-line, when there are enough products connected in parallel, according to the principle of parallel connection, the resistance value between the centralized fire control line and the zero line will be smaller, and finally close to zero, and the centralized fire control line is equivalent to the zero line. At this time, the centralized fire control line The line and the live line are equivalent to not passing the load, and directly load the product (time delay switch) with a 220V voltage difference. If there is no reasonable isolation design between the internal fire control line and the live line of the product, the product will not work normally and the life will be short. Reduced, in severe cases, it will cause the entire power grid to malfunction

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