The new relay refers to the electromagnetic relay developed and produced in order to meet the new special requirements 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, the product has reliability index (failure rate) requirements, the product adopts resistance fusion welding or laser fusion welding sealing hermetic sealing structure, mainly used in electronic control equipment signal transmission and weak power switching.
New electromagnetic relays include: non-magnetic latching relays and magnetic latching relays. Non-magnetic latching relay is a kind of monostable relay, the relay coil under the action of the specified voltage excitation, its contact output state changes, but after the coil excitation is revoked, the contact output state is restored to the initial state. The magnetic latching relay is a kind of bistable relay, which is divided into single-coil structure and double-coil structure, and the coil excitation is an electrical pulse mode. For single-coil structure relays, when the contact output state of the coil changes under the action of the specified voltage excitation, and the coil excitation is revoked, the contact can maintain the existing state, and to change the contact output state, a specified reverse voltage excitation amount needs to be added to the coil. For the double-coil structure relay, when the contact output state of the first coil changes under the action of the specified voltage excitation, and the contact can maintain the existing state after the coil excitation is revoked, and the specified voltage excitation amount is required to add the specified voltage excitation amount to the second coil to change the contact output state.
Due to the special performance of the new relay, its detection methods and testing requirements are also different from the detection of conventional relays. The main contents of the test include electrical parameter testing, electrical performance index testing, mechanical performance index testing and physical performance index testing.
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(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.
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Siemens APT current transformer – wiring method of current transformer
1. The single wiring mode can only feedback the status of single-phase current.
2. Three-phase complete star wiring, usually used in transformer differential protection wiring.
3. The two-phase incomplete star wiring method is used frequently in daily work.
4. The two phases ...
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Siemens APT current transformer – precautions for current transformers
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;
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Siemens APT Relays – Common Causes of Failure of Solid State Relays
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 ...
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Siemens APT Relays – The difference between solid state relays and intermediate relays
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;
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Siemens APT Relays – Analysis of Common Faults and Causes of Relays
1. Overhaul of the sensing mechanism
For electromagnetic (voltage, current, intermediate) relays, the sensing mechanism is the electromagnetic system. The faults of the electromagnetic system are mainly concentrated in the coil and the moving and static iron cores.
(1) Coil fault maintenance
Coil failure usually has a coil absolute...
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Siemens APT helps Tianjin's advanced manufacturing industry
Tianjin is a typical industrial city. Due to the steady progress of "three districts and one base", the advanced manufacturing industry has developed rapidly in recent years. Siemens APT brought a variety of low-voltage control products to the 14th China (Tianjin) International Industry Fair held from March 15-18. Siemens APT has launched the PB1...
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Siemens APT Relays – Protection Measures for AC Solid State Relays
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, ...
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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) ...
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Siemens APT Relays – The difference between AC relays and DC relays
1. Structural characteristics of AC relays
The coil of the AC relay is shorter, and the wire diameter is thicker, mainly because the coil is passed through the alternating current, the reactance is larger, and the thick wire diameter can reduce the internal resistance and reduce the heat generation.
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Siemens APT - x.R series relays frequently asked questions
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
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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
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Siemens APT Relays – the solution to common faults in solid state relays
1. The simplest and most effective way is to use a new solid state relay.
2. The other is to determine the voltage of the coil to avoid the voltage provided by the coil being less than the operating voltage.
3. Check whether the polarity is reversed.
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Siemens APT Relays – Reliability of Relays
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There are 5 types, which are red, yellow, green, blue, and white.
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Siemens APT Relays – Selection Principles for High Voltage Relays
1. Electrical parameter matching: The rated voltage and current of the high-voltage relay need to match the circuit demand, too small will lead to the failure of the switch, too large will waste the cost.
2. Mechanical parameter adaptation: the external dimensions, pin arrangement and wiring mode of the high-voltage relay need to be adapted to the actual installation ring.
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Siemens APT Relays – Functions of High Voltage 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.
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