Siemens APT Relays – Common Causes of Failure of Solid State Relays

1. Control switch: The high-voltage relay can open or close the high-voltage circuit to achieve the purpose of controlling the work of the equipment. 2. Protection circuit: The high-voltage relay can monitor the current, voltage, temperature and other parameters inside the high-voltage circuit, and automatically cut off the circuit when the circuit is abnormal.

Classified according to the working principle or structural characteristics of relays: 1) Electromagnetic relay: an electrical relay that works by using the suction force generated by the current in the input circuit between the electromagnet core and the armature. 2) Solid state relay: refers to the electronic components that perform their functions without mechanical ...

1. What is the maximum voltage that can be used for an ALH transformer? AC low voltage up to 720V 2. Is there a protective grade product for ALH transformers? II-P AND III-P are available in both protective grades 3. What is the maximum primary current of ALH transformer? The maximum primary side current is 8 ...

1. What is the maximum voltage that can be used for an ALH transformer? AC low voltage up to 720V 2. Is there a protective grade product for ALH transformers? II-P AND III-P are available in both protective grades 3. What is the maximum primary current of ALH transformer? The maximum primary side current is 8 ...

(1) Electromagnetic relay: an electrical relay that works by using the suction force generated by the current in the input circuit between the electromagnet core and the armature. (2) Solid relay: refers to a kind of relay in which electronic components perform their functions without mechanical motion components, and the input and output are isolated.

1. The type and series of relay selection First of all, the type of relay is selected according to the work requirements of the object to be controlled or protected, and then the appropriate series is selected according to the sensitivity or accuracy requirements. When choosing a series, you should also pay attention to the compatibility of the relay with the system. (1) ...

Signal relays are used more in secondary maintenance circuit circuits. It tells the right people exactly what is wrong with the maintenance. The power relay is a bit like a discriminant sentence in mathematics. When a constant is entered, the satisfactory and unsatisfactory conditions will output different results. Merit...

The excitation current is the main cause of the error of the current transformer, so reducing the excitation current can reduce the error (1) The core is made of materials with high permeability, because the magnetic properties of the core not only affect the ratio difference and angular difference, but also affect the saturation multiple. (2) Increase the cross-section of the iron core and shorten the magnetic circuit.

1. What are the current specifications of universal transfer switches? At present, there are four forms: 10A, 16A, 25A, and 63A 2. What are the positioning angles of the universal transfer switch? At present, it is divided into four angles: 30°, 45°, 60° and 90° 3. There is no customer's ...

(1) Sealed relay: Relay with low leakage rate by welding or other methods to seal the contacts and coils in the cover and isolate them from the surrounding medium. (2) Enclosed relay: A relay that is sealed (not sealed) with a cover to protect the contacts and coils. ...

1. Various specifications, with indicator light, with manual test button, with surge suppression loop and other functions 2. Coil control voltage DC6V-220V, AC6V-240V (50/60HZ) 3. The rail type is equipped with a variety of adaptation sockets 4. LED indicator, DC is green, AC is red ...

1. Disconnect the control power supply: Before making the low-voltage terminal contact adjustment, the control power supply should be disconnected first to avoid the current directly or indirectly passing through the relay contact, and avoid electric shock or damage to the relay. 2. Open the relay cover: Open the relay cover, you can see the inside of the relay.

1. The wiring of the current transformer should not present problems, otherwise it will lead to failure to operate normally, and there may be damage to the transformer. In this case, the primary winding needs to be connected in series with the measurement circuit, and the secondary winding needs to be connected in series with all the loads. 2. Estimation ...

1. Since the current through the AC electromagnetic relay is a changing alternating current, the magnetic flux in the magnetic circuit also changes with the alternation (sinusoidal law instead of straight line law). The suction force of the armature is varied between 0 and the maximum, so the suction of the AC electromagnetic relay is pulsating, variing.

1. The position of the auxiliary contact is not suitable. After the switch has been tripped, the mechanical part has moved, worn phenomenon, resulting in the auxiliary contact position offset to the correct position, in the protection action tripping, when the auxiliary contact is not disconnected, the outlet electrical appliances, electrical appliances, relays have returned, and it is ...

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.

On April 22, 2015, the "2015 China Automation Industry Annual Conference and the 10th China Automation Industry Century Event" sponsored by the Chinese Association of Automation was held in Beijing. At the conference, APT won the "2014 Top Ten New Enterprises in China's Automation Field" award, which was awarded by APT last year.

(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. 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. Electromagnet: The electromagnet of high and low voltage relay is usually composed of two parts: coil and core. When the high and low voltage relay inputs the electrical signal, the electromagnet coil will generate electromagnetic force, drive the iron core, and realize the on/off control of the relay. 2. Contact group: The contact group is a high and low voltage relay control ...