Siemens APT Relays – Selection Principles for High Voltage Relays

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) 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. ...

The difference between the voltage transformer and the current transformer in terms of effect principle The primary difference is that the operating conditions are very different during normal operation, and the main performance is as follows: 1) The current transformer can be short-circuited twice, but it cannot be opened; The voltage transformer can be opened twice, but it must not be short-circuited 2) ...

1. Measure the resistance of the contact Use the resistance level of the universal meter to measure the resistance of the normally closed contact and the moving point, and its resistance value should be 0, (the contact resistance value can be measured in a more accurate way within 100 milliohms); The resistance between the normally open contact and the moving point is infinite. From this, it can be distinguished which is a normally closed contact ...

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) 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. ...

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 ...

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 ...

There are several types of pushbutton switches: Pushbutton switches can be classified according to the way they are protected and how they are operated. It can be divided into open type and protected type, as well as waterproof type and anti-corrosion type, etc. And explosion-proof, knob-type, key-type, emergency-type, are also its ...

1. Why does the indicator light still glow after the control power supply has been disconnected? This situation is caused by the presence of interference voltage, and this problem can be solved by ordering our anti-interference indicator light 2. What are the operating hours of the AD16 series indicators? More than 30000 small ...

1. Before the installation of the open current transformer, it must be connected to the meter (or other measuring devices) for the second time to ensure that the transformer is not open for the second time; 2. Place all the open current transformers connected to the secondary line on the site and wait for installation; 3. If the on-site bus is electrical...

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. Poor contact Poor contact is one of the most common faults in high-voltage relays, which can lead to problems such as hot terminals ® and burned contacts. Workarounds include regularly checking terminals and set screws for loose and cleaning contact surfaces. 2. Excessive wear At...

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 ...

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

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.

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. 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) 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. ...