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 series of high-end metal buttons and many low-voltage control products to meet the needs of the mid-to-high-end market.
Zhao Haishan, Vice Mayor of Tianjin, visited the APT booth and had in-depth exchanges with the staff. When visiting the APT travel switch showcase, the product was immediately identified and the manufacturer was asked.
Comrade Zhao Haishan became interested in APT's low-voltage control products after learning that APT products are used in many local projects such as Tianjin Railway Station, Tianjin West Railway Station, Yujiapu Railway Station, Tianjin Cultural Center, etc., and hoped that the company could bring more advanced products to help Tianjin develop.
This year's Expo attracted many visitors from the advanced manufacturing industry. Everyone shuttled between the exhibition halls and appreciated the charm of contemporary industrial civilization.
Focusing on the application of personalized solutions and the continuous development of intelligent manufacturing models, so that the production quality and efficiency have undergone revolutionary changes, is the key to China's transformation from a "manufacturing power" to a "manufacturing power".
As a leading manufacturer of low-voltage control appliances in China, APT is fully committed to contributing to "Made in China 2025".
|
More on that
|
Siemens APT current transformer – a common form of current transformer ratio
1. Multi-tap current transformer. The primary winding remains unchanged, and when winding the secondary winding, several taps are added to obtain a plurality of different transformation ratios. For example, two taps are added to the secondary winding, K1 and K4 are 800/1A, K1 and K3 are 600/1A, and K1 and K2 are 400/1A, that is, the transformation ratio is 400-600-800/1A...
|
|
Siemens APT current transformer - how to see the multiple of the current transformer
1. Most of the multiple values can be seen from the nameplate attached to the instrument, which will show the style of the value/value, which can be known by dividing the previous value by dividing the back value when calculating the standard core-piercing turns. If the actual number of turns of the grommet does not conform to the standard, then the multiple should be ...
|
|
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;
...
|
|
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 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.
|
|
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. ...
|
|
Siemens APT current transformer - what need to be paid attention to in the use of current transformer
1. The secondary side of the current transformer shall not be open when working. Due to the small secondary impedance of the current transformer, the secondary side of the current transformer is close to the short-circuit state during normal operation. When the secondary side is open, a high voltage will be induced, which endangers the safety of people and equipment.
2. Electricity ...
|
|
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 ...
|
|
Siemens APT Relays - Maintenance Methods for Solid State Relays
1. The influence of the ambient temperature
The load capacity of the solid state relay is greatly affected by the ambient temperature and its own temperature rise, during the use of the device, it should be ensured that it has good heat dissipation conditions, the rated working current of more than 10A products should be equipped with radiators, and the products above 100A should be dissipated.
|
|
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...
|
|
Siemens APT Relays – Testing of Relays
(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) Coil resistance: multimeter R...
|
|
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 ...
|
|
Siemens APT Relays – Classified by relay form factor
(1) Miniature relay: the longest side of the relay is not more than 10 mm.
(2) Ultra-miniature relay: the longest side size is greater than 10 mm, but not more than 25 mm.
(3) Small miniature relay: the longest side size is greater than 25 mm, but not large...
|
|
Siemens APT Relays - Precautions for the use of solid state relays
1. When choosing the solid state used in the printed circuit board with small current specifications, because the lead terminal is made of high thermal conductivity material, the welding should be carried out under the condition that the temperature is less than 250 °C and the time is less than 10S.
|
|
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 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.
|
|
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, ...
|
|
Siemens APT Relays - What are the relays that burn out?
1. The position of the auxiliary contact is not suitable.
After the switch has been tripped, the mechanical part has moved, worn phenomenon, resulting in the auxiliary contact position offset to the correct position, in the protection action tripping, when the auxiliary contact is not disconnected, the outlet electrical appliances, electrical appliances, relays have returned, and it is ...
|
|
Siemens APT current transformers – measures to reduce errors
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.
|
|
Siemens APT limit switches – the difference between proximity switches and travel switches
01 The role is different
Proximity switches are contactless switches with a long life and are suitable for "pass-through signals". The travel switch is also known as the limit switch, the travel switch and the limit switch are both position switches, but the travel switch can detect the stroke, and can be used as an input signal to control the circuit at a certain distance ...
|
|
Contact
working hours
