4x4 light touch switch can be divided into low-voltage molded case key switch and low-voltage frame key switch. The former is used for low-voltage small current and the latter is used for low-voltage large current. The low-voltage molded case circuit breaker is commonly known as automatic key switch.
Chinese national standard GB14048 for 4x4 light touch switch Several definitions in 2 (mandatory standard. See this standard if you want to know more about low-voltage circuit breaker):.
1. Circuit breaker: a mechanical switching device that can connect, carry and break the current under normal circuit conditions, and can also connect under specified abnormal circuit (such as short circuit) and carry a certain time and breaking current.
2. Molded case circuit breaker: a circuit breaker with a shell made of molded insulating material as an integral part of the circuit breaker.
3. Air circuit breaker: a circuit breaker whose contact is interrupted and closed by air at atmospheric pressure.
4. It is convenient and safe to use. The product can be easily opened or closed, and then it can be opened gently. For use, the opening and closing state can not significantly hinder the movement or movement of people or objects in the building, and it should be able to clean the floor. The ground socket should have different protection levels to adapt to the use environment with different requirements, so as to ensure the safe use of users.
The 4x4 light touch switch is reset after power failure, that is, the locking mechanism should work related to the power supply, and the finished product seems to have no, because this requirement can be achieved by using the circuit composed of general button switch and relay.
However, if only one relay (or contactor) is used, a group of normally open contacts are used to control the working coil power supply of the relay (contactor), and the relay balance iron is used as the switch button. After pressing the balance iron, the contact of the relay control coil is closed, the coil is powered on, the relay remains closed (self-locking), and the other contacts control other lines.
What should be paid attention to when using the circular touch switch.
Tap switch 1 When welding the light touch switch terminal, if a load is applied to the terminal, it may loosen, deform and degrade the electrical characteristics due to different conditions. Please pay attention to 2 When using through-hole printed circuit boards and circuit boards other than those recommended, due to the influence of thermal stress, please fully confirm the welding conditions in advance, 3 When welding twice, please do it after the first welding part returns to normal temperature. Continuous heating may deform the peripheral part, loosen and fall off the terminal and reduce the electrical characteristics. 4 For the setting of welding conditions, it is necessary to confirm the actual batch production conditions, 5 The product is designed and manufactured on the premise of DC resistive load. When using other loads [inductive load, capacitive load], please confirm separately.
6. For the mounting hole and mode of printed circuit board, please refer to the recommended size recorded in the product drawing, 7 The switch shall be used for the structure of pressing the switch directly by people, and shall not be used for the mechanical detection function of touching the switch, 8 When lightly touching the switch, if more than the specified load is applied, the switch may be damaged. Please be careful not to apply more than the specified force on the switch, 9 Please avoid pressing the operation part from the side, 10 For the flat shaft type, try to press the center of the switch. For the hinge structure, the pressing position of the shaft will move when pressing. Please pay special attention.
11. After the switch is installed, when it passes through the heat storage hardening furnace due to the binder hardening of other parts, please contact a professional, 12 If the surrounding materials of the complete machine using the switch produce corrosive gas, it may cause poor contact and other phenomena, so please fully confirm in advance, 13 The carbon contact point has the characteristic that the contact resistance changes due to the pushing load. When it is used in the voltage divider circuit, please use it after full confirmation, 14 For models other than closed type, please pay full attention to the intrusion of foreign matters.
Chinese national standard GB14048 for 4x4 light touch switch Several definitions in 2 (mandatory standard. See this standard if you want to know more about low-voltage circuit breaker):.
1. Circuit breaker: a mechanical switching device that can connect, carry and break the current under normal circuit conditions, and can also connect under specified abnormal circuit (such as short circuit) and carry a certain time and breaking current.
2. Molded case circuit breaker: a circuit breaker with a shell made of molded insulating material as an integral part of the circuit breaker.
3. Air circuit breaker: a circuit breaker whose contact is interrupted and closed by air at atmospheric pressure.
4. It is convenient and safe to use. The product can be easily opened or closed, and then it can be opened gently. For use, the opening and closing state can not significantly hinder the movement or movement of people or objects in the building, and it should be able to clean the floor. The ground socket should have different protection levels to adapt to the use environment with different requirements, so as to ensure the safe use of users.
The 4x4 light touch switch is reset after power failure, that is, the locking mechanism should work related to the power supply, and the finished product seems to have no, because this requirement can be achieved by using the circuit composed of general button switch and relay.
However, if only one relay (or contactor) is used, a group of normally open contacts are used to control the working coil power supply of the relay (contactor), and the relay balance iron is used as the switch button. After pressing the balance iron, the contact of the relay control coil is closed, the coil is powered on, the relay remains closed (self-locking), and the other contacts control other lines.
What should be paid attention to when using the circular touch switch.
Tap switch 1 When welding the light touch switch terminal, if a load is applied to the terminal, it may loosen, deform and degrade the electrical characteristics due to different conditions. Please pay attention to 2 When using through-hole printed circuit boards and circuit boards other than those recommended, due to the influence of thermal stress, please fully confirm the welding conditions in advance, 3 When welding twice, please do it after the first welding part returns to normal temperature. Continuous heating may deform the peripheral part, loosen and fall off the terminal and reduce the electrical characteristics. 4 For the setting of welding conditions, it is necessary to confirm the actual batch production conditions, 5 The product is designed and manufactured on the premise of DC resistive load. When using other loads [inductive load, capacitive load], please confirm separately.
6. For the mounting hole and mode of printed circuit board, please refer to the recommended size recorded in the product drawing, 7 The switch shall be used for the structure of pressing the switch directly by people, and shall not be used for the mechanical detection function of touching the switch, 8 When lightly touching the switch, if more than the specified load is applied, the switch may be damaged. Please be careful not to apply more than the specified force on the switch, 9 Please avoid pressing the operation part from the side, 10 For the flat shaft type, try to press the center of the switch. For the hinge structure, the pressing position of the shaft will move when pressing. Please pay special attention.
11. After the switch is installed, when it passes through the heat storage hardening furnace due to the binder hardening of other parts, please contact a professional, 12 If the surrounding materials of the complete machine using the switch produce corrosive gas, it may cause poor contact and other phenomena, so please fully confirm in advance, 13 The carbon contact point has the characteristic that the contact resistance changes due to the pushing load. When it is used in the voltage divider circuit, please use it after full confirmation, 14 For models other than closed type, please pay full attention to the intrusion of foreign matters.
