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 a transistor departer or zero indicator, a logic loop and an output loop.
3. Electromagnetic relay: electromagnetic relay has the characteristics of simple structure, easy use and maintenance, small contact capacity, large number of contacts, no main and auxiliary, no arc extinguishing device, small size, fast action, etc., and is widely used in low-voltage control systems.
4. Induction relay: Induction relay is an electrical relay that works by using the interaction force between the alternating (moving or rotating) magnetic field generated by the input excitation amount and the current induced by the movable conductor (disc, drum or ring) in the magnetic field.
According to the nature of the reaction charge, it is divided into:
1. Current relay: The current relay is a kind of electrical device used to protect electrical equipment or motors from overcurrent and undercurrent. It is usually used in automatic control circuits to play the role of automatic adjustment, safety protection, conversion circuits and so on.
2. Voltage relay: Voltage relay is a measurement relay with input quantity and characteristic quantity as voltage, which is mainly used in relay protection devices of generators, transformers and transmission lines, as a starting element for overvoltage protection or low-voltage locking.
According to the role, it can be divided into:
1. Time relay: Time relay is an electrical component used in a circuit with a lower voltage or a lower current to turn on or cut off the circuit with a higher voltage and a larger current. It is an automatic control appliance that uses the principle of electromagnetism or mechanical action to delay the closing or breaking of contacts.
2. Signal relay: Signal relay is a commonly used electrical appliance in automatic control system, which is used to turn on and off circuits to issue control commands and reflect the status of equipment to form automatic control and remote control circuits.
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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
4. Combination light ...
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Siemens APT current transformer - introduction to the classification of current transformers
Categorized by use
According to different uses, current transformers can be roughly divided into two categories:
Current transformer for measurement (or measurement winding of current transformer): provides current information of the power grid to measurement, metering and other devices within the normal working current range.
Protecting Electricity ...
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Siemens APT limit switches – what are the limits used for?
daily life
There are many applications of travel switches, and it is found in many electrical appliances. So what does such a simple switch do? It mainly plays the role of chain protection. The most common example is its use in washing machines and tape recorders (VCRs). ...
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Siemens APT Relays - the main product technical parameters of relays
(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.
...
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Siemens APT transformer - the use, principle and selection of current transformer
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 ...
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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 relay - the cause and solution of the fault of the high-voltage relay
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 ...
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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...
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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;
3. If the on-site bus is electrical...
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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 Relays - What are the classifications of high and low voltage relays?
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. ...
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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 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 ...
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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 ...
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Siemens APT Limit Switches - Introduction to the types and characteristics of limit switches
Conventional domestic travel switch
LX19-001/111 in the LX19 series, LXK3-20S/T in the LXK3 series, JLXK1 series JLXK1-111/411/511 in the conventional travel switch are the most representative.
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Siemens APT Relays – Classified by relay load
(1) Micro-power relay: when the contact open circuit voltage is DC 28V, the (resistivity) is 0.1A, 0.2A relay.
(2) Weak power relay: when the contact open circuit voltage is DC 28V, (resistivity) is 0.5A, 1A relay.
(3) Medium power relay ...
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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 - ALH-0.66 series transformer FAQ
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 ...
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Siemens APT relay - common faults and solutions for high-voltage relays
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...
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What are the main problems with Siemens APT Relays – Solid State Relays?
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 ...
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