Siemens APT Relays – Testing of Relays

Create Date: 2024-8-30 12:03:23|Source: APT/Siemens Shanghai Ergong

(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) Measuring coil resistance: The resistance of the relay coil can be measured with the multimeter R×10 gear, so as to judge whether the coil has an open circuit.

(3) Measure the pick-up voltage and pick-up current: use the adjustable regulated power supply and ammeter to input a set of voltages to the relay, and connect the ammeter in the power supply circuit for monitoring. Slowly increase the power supply voltage, and when you hear the sound of relay pick-up, record the pick-up voltage and pick-up current. To be accurate, you can try averaging multiple times.

(4) Measure the release voltage and release current: it is also a connection test like the above, when the relay is engaged, and then gradually reduce the power supply voltage, when the relay is released again, write down the voltage and current at this time, and you can also try many times to obtain the average release voltage and release current. Under normal circumstances, the release voltage of the relay is 10%-50% of the pick-up voltage, if the release voltage is (less than 1/10 of the pick-up voltage), it can not be used normally, which will pose a threat to the stability of the circuit and make the work unreliable.

More on that

	APT won the 2014 Top Ten Cutting-edge Enterprises in China's Automation Field 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.
	Siemens APT Relays – Principles and characteristics of photorelays When the input quantity (such as voltage, current, temperature, etc.) reaches the specified value, the controlled output circuit is turned on or off an electrical appliance. It can be divided into two categories: electrical (such as current, voltage, frequency, power, etc.) relays and non-electrical (such as temperature, pressure, speed, etc.) relays. With action ...
	Siemens APT Relays – What are the types of protection relays? Overcurrent Relay (OCR) It operates when a certain value or greater of current flows through. There are two elements: overcurrent detection (known as a timing element) and short-circuit current detection (as an instantaneous element). Earth Fault Overcurrent Relays (OCGR, GR) While...
	Siemens APT relay - the main structural features of high and low voltage relays 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 ...
	Siemens APT current transformer - precautions for the use of current transformer 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 ...
	AD16-30JC Series Combination Light FAQ 1. What are the basic combination colors of combination lights? Red, yellow, green, blue, white, bicolor. 2. What are the different types of combination light panes? F, H, L, V, G any combination 3. Is the lampshade detachable? OK 4. Combination light ...
	Siemens APT Relays – How to Choose Relays? 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) ...
	Siemens APT relay - the use of solid state relay pay attention to five major matters 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、 ...
	Siemens APT Relays – an introduction to the new type of relay 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 ...
	Introduction to the characteristics of Siemens APT relays - solid state relays 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-...
	Siemens APT Relays – classified by their operating principle or structural characteristics (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.
	Siemens APT relays – classified according to the protection characteristics of the relays (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. ...
	Siemens APT Relays – The difference between signal relays and power relays 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...
	Siemens APT current transformer – current transformer operating error When the current transformer is finalized and its internal parameters are determined, the magnitude of the error will be affected by the secondary current (or primary current), secondary load, power factor, and frequency. These factors are called external factors, and the error of the current transformer in operation is mainly affected by these four factors. ...
	Siemens APT current transformer - working principle and characteristics of current transformer 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 ...
	Siemens APT Relays – a commonly used detection method for high and low voltage relays 1. Visual inspection method: observe the appearance of the relay by the naked eye, check whether it is damaged or deformed, observe whether the contacts are tightly contacted, and whether there are copper slag and other substances attached to the contacts. 2. Parameter detection method: use test instruments to detect the parameters of the relay, such as: ...
	Siemens APT Relays – The action of high and low voltage relays and how to adjust the low voltage side 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.
	Siemens APT Pushbutton Switches – How Many Types of Pushbutton Switches Are There? 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 ...
	Siemens APT warning light - the role of LED warning light in life 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 ...
	Siemens APT current transformers – precautions for the use of current transformers 1) The wiring of the current transformer should comply with the principle of series connection: that is, the primary winding resistance should be connected in series with the tested circuit, while the secondary winding resistance should be connected in series with all instrument loads 2) According to the size of the measured current, select the appropriate transformation ratio, otherwise the error will increase. At the same time, one end of the secondary side must be grounded in case ...