A universal relay is a relay that can be used universally in a certain field or in many fields. A relay is an electrical appliance that causes a predetermined step change in a controlled quantity in an electrical output circuit when a change in an input quantity (excitation quantity) reaches a pres... read more
The comparison between traditional relays and solid-state relays involves many types, so the following comparison between electromagnetic relays and corresponding solid-state relays illustrates their differences: 1. Structural difference: The electromagnetic relay works by using the suction force g... read more
In the process of using the solid-state relay, it is still good to check all aspects. After a period of heating, when I check it again, I find that the solid-state relay is broken. What is the reason for this? It is mainly the effect of temperature. What are the effects of temperature on the use of... read more
Classification according to the overall dimensions of the relay: 1. Miniature relay: a relay with the longest side size not greater than 10 mm. 2. Subminiature miniature relays: Relays with the longest side larger than 10 mm but not larger than 25 mm. 3. Miniature miniature relay: The relay with th... read more
Because there are many types of low-voltage electrical appliances, their functions are diverse, they are widely used, and their working principles are different, so there are different classification methods. According to its relationship with the use of the system, it can be divided into the follo... read more
The programmable controller is developed from the relay control system. Due to the application of microprocessor and electronic technology, PLC has the following characteristics: 1.High reliability PLC adopts many anti-interference measures, such as electromagnetic shielding of CPU module, settin... read more
When the motor is working normally, if the motor stops due to the disappearance of the power supply voltage, the motor may start automatically when the power supply voltage is restored. The self-starting of the motor may cause personal or equipment accidents. For the power grid, the self-starting o... read more
1. Short-circuit protection When a short circuit occurs, the main circuit is cut off by the fuse of the fuse FU. In order to expand the protection range, the fuse is as close to the power supply as possible in the line, and is generally installed directly under the knife switch. 2. Overload prote... read more
The essential difference between a programmable controller and a traditional relay control system is the use of the scanning mode and the concept of a relay. PLC system design includes two parts: hardware design and software design. The design method of parallel development of hardware and software... read more
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