Siemens APT relay - common faults and solutions for high-voltage relays

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.

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 ...

The principle of the current transformer is based on the principle of electromagnetic induction. A current transformer is composed of a closed core and windings. Its primary side winding turns are very small, string in the line of the current that needs to be measured, so it often has all the current of the line flowing through, the number of turns of the secondary side winding is relatively large, and the series ...

How a current transformer works The principle of current transformer is based on the principle of electromagnetic induction. A current transformer is composed of a closed core and windings. It has a small number of turns on the primary side winding, stringed in the line where the current needs to be measured, so it often has the full current of the line ...

1. Some common faults of high-voltage relay coils 1. The common fault cause of the coil is often disconnected: whether the ultrasonic wave is used to clean the high-voltage relay, or whether the overvoltage is added to the coil will also promote the probability of the coil being disconnected. 2 ...

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 ...

1. Selection of voltage level and overvoltage protection of solid-state relay When the voltage peak value applied to the AC terminal of the solid state relay exceeds the maximum voltage peak that the AC solid state relay can bear, the components in the solid state relay will be broken down by the voltage and cause damage to the AC solid state relay, ...

1) Electromagnetic relay: an electrical relay that works by using the suction force generated by the circuit 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. ...

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 ...

1. Working process: AC zero-crossing solid state relays have the characteristic of turning on when the voltage crosses zero and turns off when the load current crosses zero. Circuit diagrams, dimensions and drawings of zero-crossing AC solid state relays When the optocoupler OPT is turned off (i.e. there is no input signal at the control end of the OPT ...

1. First of all, there is a general understanding of the knowledge of the limit switch, which is usually composed of a shell, an interconnection system and an operating head. 2. First of all, the limit switch should be set to the desired location, and then connected, in addition, it is necessary to figure out the meaning of different letters, such as NC for the long ...

1. There is an abnormal noise or over-temperature of the iron core Cause of failure: When the current transformer is in operation, if there is an open circuit or overload in the secondary circuit, it will lead to abnormal sound and over-temperature of the core.

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. 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. Regularly check whether the current transformer is overheated, check whether there is discoloration in the terminal, and check whether there are sundries in the terminal box. 2. Check whether there is oil leakage in the oil level gauge in time to ensure that the oil level meets the use standard and there is no oil leakage.

1. What are the installation methods of ALS limit switches? Usually the limit switch is divided into front of the board installation or board back installation, all of which are installed by screws. 2. What are the different modes of limit switch action? According to the action mode of the limit switch head, it is divided into ...

According to the principle of action, it is divided into: 1. The rectifier relay is used in the AC circuit, and its electromagnetic system, contact system and action principle are the same as those of the DC stepless relay. 2. Transistor relay: Transistor relay is composed of transistor transmitter or zero indicator, logic relay, transistor relay.

(1) Isolation between input and output circuits; (2) signal conversion; (3) Add output circuit; (4) repetitive signal; (5) Switch between different voltage or current loads; (6) Retain the output signal; (7) Locking circuit; (8) Provide remote control ...

1. Does the AC control relay have surge suppression? SR/NR/PR can produce AC with surge suppression circuits 2. How many types of thermal current specifications are there for our company's relays? 3A, 5A, 8A, 10A, 12A five current specifications 3. Surge suppression back ...

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 ...