Common types of metal button switches include self-locking switches, self-reset switches, knob gear switches, lever gear switches, locking switches, etc.; Because the metal button switch is small in size, easy to install, metal material, and voltage can be used in the range of 9-220V, and the appearance of metal texture, and even personalized icons can be customized, so that the modification effect is more high-end and high-grade, so it is widely used; Common use cases are: car modification, computer assembly, instrumentation, electrification control, and so on.
The self-locking switch is to lock the button by clicking and pressing, and the self-locking mechanism in the switch does not let it pop up, and the circuit is energized and the switch indicator light is lit at this time; After pressing the switch again, the release button of the self-locking mechanism in the switch pops up, and the circuit is powered off and the switch indicator is extinguished; Self-locking switches are commonly used in circuit control that requires continuous power-on, such as lights, motors, fans, etc.
The self-centering switch is to press the switch, and after the trigger mechanism in the switch touches each other, the circuit is energized and the switch indicator light is lit; Once the press is released, the trigger mechanism in the switch is separated from each other, and the circuit is powered off and the switch indicator is extinguished; Fail-safe switches are commonly used in circuit control that only needs to be triggered once and has a short time period, such as horn sounding, computer restart, warning light, etc.
The knob gear switch is controlled by the circuit by rotating the knob, generally with two or three gears; The knob is in the initial position, at this time the circuit is powered off and the switch indicator is off; After the knob is rotated to the first gear, the corresponding circuit of the first gear is energized at this time, and the switch indicator light is lit; After the knob is rotated to the second gear, the corresponding circuit of the second gear is energized at this time, and the switch indicator is lit; The knob switch is commonly used in scenarios where you need to adjust the speed, brightness, temperature, and other changes in strength, such as the fan speed, washing machine speed, air conditioner temperature, etc.
The lever gear switch is to control the circuit by toggling the lever, generally with two or three gears; The lever is in the initial position, at which time the circuit is powered off and the switch indicator is off; After the lever is toggled to the first gear, the corresponding circuit of the first gear is energized at this time, and the switch indicator light is lit; After the lever is toggled to the second gear, the corresponding circuit of the second gear is energized at this time, and the switch indicator light is lit; The lever gear switch is commonly used in scenarios that need to be switched on and closed, and the state needs to be changed, such as turning on the microphone, electric guitar tone switch, ship and aircraft dashboard, etc.;
With lock switch, that is, the switch is equipped with a lock cylinder inside, which needs to be inserted into the matching key to rotate and unlock for circuit control, and when the initial lock is locked, the circuit is powered off and the switch indicator is extinguished; Insert the matching key to rotate and unlock, at this time the circuit is energized and the switch indicator is lit; Locking switches are generally used in scenarios where power needs to be turned on and off with high authority level and safety, such as sluices, electric gates, and switches for dangerous operation facilities.
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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 Relays – The Cause of Solid State Relays Burnout
1. Poor design (low margin of voltage or current reservation during selection, insufficient heat dissipation conditions, etc.).
2. The fuse is too large or the fast fuse is not used as required.
3. The radiator is full of dust or the cooling fan fails.
4. Solid State Relay ...
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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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APT made a wonderful appearance at the Northeast Automation Exhibition
On March 31, 2009, the 12th Northeast International Instrumentation and Industrial Automation Exhibition was successfully opened in Shenyang, the industrial hinterland of Northeast China. In recent years, with the national revitalization of the old industrial base in Northeast China and the gradual deepening of the equipment manufacturing industry, the rapid development of Northeast China has provided ...
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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 ...
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Siemens APT - AD16 series indicator frequently asked questions
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 ...
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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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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 ...
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Siemens APT current transformer - inspection content of current transformer
1. Regularly check whether the current transformer is overheated, check whether there is discoloration in the terminal, and check whether there are sundries in the terminal box.
2. Check whether there is oil leakage in the oil level gauge in time to ensure that the oil level meets the use standard and there is no oil leakage.
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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.
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Siemens APT - FM series metal button indicator frequently asked questions
1. Which series of metal buttons can produce two-color buttons with light?
FM25N
2. Which series can produce knobs?
FM-N series
3. Which type of metal illuminated button needs an external resistor for step-down?
FM16E
4. What is the material of the shell ...
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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 ...
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Siemens APT Relays - What are the common faults of relays?
1. Contact failure
(1) The phenomenon that cannot be disconnected due to mechanical occlusion of the contact (the needle-like protrusion and pit formed on the contact bite each other), fusion welding, or cold welding.
(2) The contact wear of the relay is caused by the absence of arc extinguishing devices or measures, or improper parameter selection, ...
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Siemens APT current transformer – the basis for whether the current transformer is damaged or the measurement is inaccurate
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 ...
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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...
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Siemens APT current transformer - common faults and solutions of current transformers
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.
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Siemens APT Relays - High Voltage Relay Fault Causes and Solutions
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 – Maintenance of high-voltage relays
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 ...
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Siemens APT – PB1 Series FAQs
1. What are the installation methods of PB1 button?
PB1S and PB1L are fastened with metal screws, and PB1J and PL1 are fastened with plastic nuts.
2. PB1 series pushbuttons can be assembled with up to several sets of contact modules as standard
2*3=6
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Siemens APT Relays – What are the forms of protection relays?
Rail protection relays
A protective relay that works mainly as a result of accidents that occur in transmission lines. When this method works, the circuit breakers at both ends of the faulty line will be disconnected.
Busbar protection relays
A protective relay, mainly due to the power plant or transformer...
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