(1) Rated working voltage: refers to the voltage required by the coil when the relay is working normally. Depending on the type of relay, it can be either AC voltage or DC voltage. (2) DC resistance: refers to the DC resistance of the coil in the relay, which can be measured by a multimeter. ...

(1) Measure the resistance of the contact: use the resistance of the multimeter to measure the resistance of the normally closed contact and the moving point, and the resistance value should be 0; The resistance between the normally open contact and the moving point is infinite. From this, it is possible to distinguish which is a normally closed contact and which is normally open. (2) Coil resistance: multimeter R...

1. The influence of the environment on the reliability of the relay: the average time between failures of the relay is the highest under GB and SF, reaching 820,000h, while in the NU environment, it is only 60,000h. 2. The influence of quality grade on the reliability of relays: when the relay of A1 quality grade is selected, the flat ...

The new relay refers to the electromagnetic relay developed and produced in order to meet the special requirements of the new and meet the use of special environmental conditions, its main characteristics are small size, light weight, vibration resistance, shock resistance, load range from low level load to 5A, 28 V rated load, product ...

1. Contact failure (1) The phenomenon that cannot be disconnected due to mechanical occlusion of the contact (the needle-like protrusion and pit formed on the contact bite each other), fusion welding, or cold welding. (2) The contact wear of the relay is caused by the absence of arc extinguishing devices or measures, or improper parameter selection, ...

How relays work Relays generally refer to electromagnetic relays, that is, mechanical actions. The working principle of the relay is essentially to use one loop (generally a small current) to control the on/off of another circuit (generally a large current), and in this control process, ...

1. The reason for the frequent disconnection of the coil: whether the solid state relay is cleaned with ultrasonic, whether the coil is overvoltaged, etc., will cause the coil to be disconnected. 2. The reason for the insufficient power supply of the coil: First, it is necessary to confirm the voltage of the solid state relay coil. If the voltage supplied to the coil is lower than ...

1. The simplest and most effective way is to use a new solid state relay. 2. The other is to determine the voltage of the coil to avoid the voltage provided by the coil being less than the operating voltage. 3. Check whether the polarity is reversed. 4. Reasonable power-on time for the solid state relay coil, if ...

1. The influence of the ambient temperature The load capacity of the solid state relay is greatly affected by the ambient temperature and its own temperature rise, during the use of the device, it should be ensured that it has good heat dissipation conditions, the rated working current of more than 10A products should be equipped with radiators, and the products above 100A should be dissipated.

First, the solid-state relay has no contacts and coils in the structure, which can be opened and closed at a high frequency and will not produce sparks, and has a long service life; Second, the intermediate relay is generally only used for the control loop, and cannot work with load, and will make a "pop" sound when it is sucked in; ...

merit 1. High life, high reliability: solid state relay has no mechanical parts, the contact function is completed by solid devices, because there are no moving parts, so it can work in a high impact and vibration environment.

Solid state relay is a non-contact electronic switch with isolation function, no mechanical contact parts in the switching process, so in addition to having the same function as electromagnetic relay, solid state relay also has logic circuit compatibility, vibration resistance and mechanical impact resistance, unlimited installation position, and good anti-...

Solid state relays consist of three parts: the input circuit, the isolation (coupling), and the output circuit. Input circuitry According to the different categories of input voltage, the input circuit can be divided into three types: DC input circuit, AC input circuit and AC and DC input circuit. Some input control circuits are also ...

When the solid state relay is open and there is voltage at the load end, there will be a certain leakage current at the output end, and care should be taken to prevent electric shock when using or designing. When the solid-state relay fails to be replaced, the original model or the product with the same technical parameters should be selected as far as possible, so as to match the original application line and ensure that the system ...

1. First of all, solid-state relays have a long service life and strong reliability. The solid state relay corresponds to the CDG1 series delicacy. This solid-state relay has no mechanical parts and solid-state devices to complete the contact function. Since the parts do not move, they can work in high shock and vibration environments. Because...

First, the solid-state relay has no contacts and coils in the structure, which can be opened and closed at a high frequency and will not produce sparks, and has a long service life; Second, the intermediate relay is generally only used for the control loop, and cannot work with load, and will make a "pop" sound when it is sucked in; ...

1. When choosing the solid state used in the printed circuit board with small current specifications, because the lead terminal is made of high thermal conductivity material, the welding should be carried out under the condition that the temperature is less than 250 °C and the time is less than 10S.

1. The influence of the ambient temperature The load capacity of the solid state relay is greatly affected by the ambient temperature and its own temperature rise, during the use of the device, it should be ensured that it has good heat dissipation conditions, the rated working current of more than 10A products should be equipped with radiators, and the products above 100A should be dissipated.

1. When selecting the solid-state relay used in the printed circuit board with small current specifications, because the lead terminal is made of high thermal conductivity material, the soldering should be carried out under the condition that the temperature is less than 250 °C and the time is less than 10S.

1. Poor design (low margin of voltage or current reservation during selection, insufficient heat dissipation conditions, etc.). 2. The fuse is too large or the fast fuse is not used as required. 3. The radiator is full of dust or the cooling fan fails. 4. Solid State Relay ...

1. The resistive load should not exceed 60% of the rated current; 2. Overcurrent and load short circuit may cause permanent failure of the internal thyristor in SSR, so it is necessary to install a fuse or air switch, and a fuse can be used if the capacity is small; 3、 ...