Siemens APT Relays – The Cause of Solid State Relays Burnout

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 inspection basis for whether the current transformer is damaged: 1. The basis for checking whether the polarity is damaged: The primary winding of the current transformer is marked P1 and P2, and the secondary winding is marked as S1 and S2. If P1 and S1 are the same name, then this sign is called reduced polarity. Primary current from P1 ...

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. Regular cleaning: The relay needs to be cleaned regularly with dust and dirt to keep its surface clean and smooth. It can be cleaned with a clean cloth or brush, and detergents containing acids and bases should be avoided. 2. Check the wiring: The wiring of the relay needs to be fastened firmly, and the contact ...

1. Differences in use The conversion ratio of the current transformer is inconsistent with the transformation ratio of the ammeter, which will lead to the inability to use the displayed value of the ammeter directly, and the proportional conversion must be carried out; If the transformer of ratio 5 is used on the meter of ratio 1, the secondary current of CT will generally exceed 1A, so that the transformer of 5 is used on a meter of 1 ratio. Than 1 ...

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 ...

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.

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) 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. ...

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, ...

The voltage transformer output is usually 100V 1. The working impedance in the secondary circuit of the voltage transformer should not be too small to avoid overload operation. 2 Before connecting the circuit, the polarity of the voltage transformer should be verified. 3 After connecting the circuit, the secondary coil should be reliably grounded, ...

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.

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. 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.

LED warning light function 1. The luminous method selection items are: solid light, shiny, burst flash, constant/shiny mix. 2. The installation base is: L rod, straight rod, folding, and barrel type. Effect of LED warning light_Effect in different scenes 1. Construction unit On the road ...

1. Current transformers are classified according to the installation method According to the installation method, the current transformer can be divided into through-type current transformer, pillar type current transformer, bushing type current transformer, and busbar type current transformer. Through-type current transformer: used to pass through the screen or wall...

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 ...

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-...

(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. 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 ...