Overview of domestic and foreign Principal company products

1.ABB B series, A Series in early 1980s, the Shanghai people’s Electrical Appliance Factory, Beijing Electric Factory as a production license form, technology introduction of ABB B series has a preliminary modular structure; after the launch of the EB, EH series; 90’s launched the A series. A series contactor has 9 ~ 1050A22 current level, 8 kinds of models, the application of the environment temperature is: – 40, 70, is the characteristics of the contactor.
2 Fuji Corp’s SC-E series SC-E series is a joint venture between Changshu Switch Factory Co., Ltd. and Fuji Corp, there are 9 ~ 800A18 current rating, 10 kinds of models. In addition to the characteristics of the module, the volume is small, its bright spot. For example, the SC-E25 of the rated current 50A of 90mm x 54mm x 96mm, only for the same current rating of ABB A50D 50.6%, is a Schneider Inc LC1-D50 38.5%, with a high reliable contact performance (DC5V, 3mA).
3 Schneider Inc LC1-D Series in the early 1980s, Tin Shui 213 machine tool electric plant to introduce the Schneider Inc LC1-D series of contacts, is the first to enter the country of the contactor. At that time, LC1 by the current size of 9 ~ D 95A series and 115 ~ F 780A series. In recent years, the introduction of a current level of 9 ~ 620A20, 8 models of the LC1-D series. The product is a typical representative of the modular structure, further reducing the flying arc distance, improve the protection level, operating frequency can be as high as 3600 /h (small current specifications) or 2400 /h (large current specifications).
4 SIEMENS’s 3RT series SIEMENS 3RT series contactor inherited the 3TB’s life span, the coil module, easy to replace the advantages, and the realization of the full plastic and high protection (IP2x). Full range of 7 to 500A19 current rating, 7 kinds of models, the highest mechanical life of 30000000 times, the average power consumption of the coil is easy to be similar to the characteristics of the same.
5 domestic C J40, CJ45 series products of this series of products mainly by Shanghai Electrical Apparatus Research dominated development, Hangzhou Zhijiang switch factory, Shanghai People’s Electrical Appliance Factory, Tianjin Baili, Chint Electric Appliance Co., Ltd., the production of C J40, CJ45; Tianshui 213 factory introduced production gsc1 column; Shanghai Liangxin electrical appliance Co., Ltd. of the Ndc1 series, after the two basic sources in the form of LC1. CJ45 from 6.3 to 800A19 current specifications, 10 kinds of models, the mechanical and electrical life of 10000000 times and 1000000 times, with a modular and fully plastic structure, there is a delay, coil surge suppression, mechanical interlocking and other accessories, in particular, the use of Ag-Ni (16A and below) or AgSnO2 (16A above), with environmental protection.

Identification method for auxiliary contact of AC contactor

1 marked with NO and NC
NO is the abbreviation of open normal (often) in English, NC is the abbreviation of close normal (Chang Bi).
2 marked with digital serial number 11 or 12, etc.
Behind one digit (1, 2) represents a normally closed contact (3, 4), which is normally open contacts. There are (5, 6), (7, 8) on behalf of the time relay is normally closed, normally open contact group.
3 can the auxiliary contact of the AC contactor be directly connected to the 220V?
Can, in fact, many of the circuit’s indicator is the 220V.
4 function of auxiliary contact
AC contactor has three pairs of main contacts, the above three terminal is connected to a power supply, below the 3 terminal is connected to electrical equipment, attracting coil connected control circuit, when a pick-up coil, iron core generates magnetic, attract the armature, and the main contact bonding and electrical equipment through electrical work. In addition to the auxiliary and normally open and normally closed electric shock, can be used as a lock and mutual lock control. The function of the normally open contact in the control loop is described in the following diagram.

5 normally open normally closed recognition method
Million with sheet resistance profile measurements (uncharged measurement) in general as a group, the channel resistance is zero or near zero) as the name implies the is normally closed, open circuit (resistance of infinity) is normally open.

Maintenance and inspection of AC contactor

Operation inspection items for AC contactor
1 check whether the maximum load current exceeds the load value of the contactor.
2 check whether the temperature rise of the contactor coil is less than 65 degrees.
3 monitor contactor has no acoustic and electromagnetic system with and without excessive noise and overheating.
4 check the contact system and connection point has no overheating and burning phenomenon.
5 check out the arc cover is complete, if damage should be replaced after re operation.
6. Maintenance contact system, with fine contusion or fine sandpaper polishing contact surface, keep the original state of contact, adjust the contact surface and the contact pressure, to keep the three-phase contact at the same time, the contact burning serious should be replaced.
7 check the internal accessories of the arc cover, and clean the smoke marks and other impurities.
8 check the insulation of linkage mechanism, and check whether there is deformation, displacement and loose phenomenon.
9. Check core pull of the contact surface is smooth, whether there is uneven or oil pollution situation, short circuit ring whether fracture or excessive oxidation and slippage, attraction is good, after disconnection, whether to go back to the normal position.
10 AC contactor’s cleaning and the surrounding environment inspection.
11 the signal indicating whether the AC contactor is in line with the state of the circuit.
12 electromagnetic coils without overheating, short circuit ring on an electromagnet without prolapse and damage phenomenon.
13 auxiliary contact with non erosion phenomenon.
14 core pull is good, there is no more noise, after disconnection can return to normal position.
15 around the environment is not changed, there are no exception to the normal operation of the factors, such as excessive vibration, ventilation, electrical dust, etc..

Installation and use of AC contactor

1 AC contactor operation problem
AC contactor is a widely used control appliance, mainly used to control motors and other electrical equipment operation and stop, an ordinary AC contactor in the attraction, the coil of the AC contactor still through the alternating current, power consumption is relatively large, so the heat coil, noise is relatively common, not only a waste of electricity can and coil insulation easily aging makes the AC contactor shortened life expectancy.
Function and using effect of energy saving module of 2 AC contactor
In an ordinary AC contactor is used for the energy saving module, reduces the AC contactor suction state power greatly, coil temperature will greatly reduced, the contactor coil insulation layer because of the high temperature aging, so as to prolong the service life of the contactor. The noise greatly reduced the operating state of AC contactor, the contactor to improve the use environment conditions. Ordinary AC contactor can only be rated voltage of 85% to 110% of the range, when the coil ends voltage higher than the rated voltage of 110%, AC contactor coil may be due to heat and burn, after the installation of this module in the contactor, AC contactor to withstand voltage fluctuations in power, in the case of high power supply voltage, AC contactor coil will not burn.
Join the module after the contactor sound crisp and powerful, attracting state current is only not the installation of the module of 10% ~ 40%, power-saving rate of 90% ~ 60%. And contactor noise reduced, for a long time to contactor attracting, the contactor coil surface without obvious temperature rise, even and cool feeling, to CJ20-400A contactor test, without energy-saving module (coil voltage 220V) contactor in the attraction of the reach a steady state when the voltage is 220V, current for 0.615A, noise is 52.5dB, temperature 105.2 DEG C, the installation module after the steady state is reached when the voltage is 220V, current 0.184A, noise is 36.6dB, 26.8 degrees Celsius temperature, seen in a power saving rate of 70%. By the above experiments can be seen: installing l AC contactor energy-saving module in the contactor coil circuit, the contactor current, noise and temperature rise decreased drastically. It is proved that the module of AC contactor with decrease coil loop current, reduce noise, reduce temperature rise.
Now Kang Bao county all street lamps have been installed in the module, a complete solution to the interference of the noise of the contactor at night when the residents of the interference, saving a lot of electricity.
Installation and application of energy saving module of 3 AC contactor
At the top of the module, there are two input terminals, and the lower part of the lower side of each have two output leads, the lower part of the module output wire connecting the terminal (A2, A1), the input terminal of the module to the end of the AC contactor control circuit.
Energy saving module of the working voltage of AC220V, the input terminal can only access the operation of the 220V power supply, access to the 380V power, but the output of this module can drive coil rated voltage 380V AC contactor, this point, please pay special attention to!
If the contactor coil voltage is 220V, the wire will be removed from the terminal, and then the output of the module is connected to the coil of the contactor. If the original contactor coil voltage is 380V, to put the module on the AC contactor coil circuit, but also the original control circuit two power lines in a root change received N line (the original control power line connecting two phase, voltage of 380V, now one of the strings instead received N line, enable the control voltage change 220V), if the original control circuit and rated voltage 380V indicator light, an intermediate relay, a time relay and so on element, but also the replacement of these components is the rated voltage is 220V element.

electric motor starter contactor

Starter
Control motor starting and stopping the use of electrical appliances. Motor starting, the starting current to exceed the motor rated current many times, starting current, the voltage of the line temporarily to be reduced. In case of large capacity, the voltage is lower, and it has little influence on the work of other electrical equipments on line. Therefore, the medium and small capacity AC motor can be used in direct starting mode. If the line voltage is reduced more, on the one hand, it will affect the operation of other equipments on the line. On the other hand, the starting torque of the motor will be reduced, the starting will be difficult, and even starting failure.
The starter is divided into two types, manual and automatic. The common use of a star delta starter in the manual starter of AC motor, which belongs to the starting mode of the buck. At the start, the winding is connected to the star, so that the applied voltage of each phase winding is reduced to the phase voltage to reduce the impact of the starting current. In the starting process, the three-phase winding is converted into a triangle by the method of triangle, and the starting of each phase voltage is raised to the line voltage. The manual starter of the DC motor is a series of current limiting resistance in the motor winding circuit to limit the starting current, and with the manual operation to cut series resistance, the speed of the DC motor is gradually increased, and the starting time of the whole series resistance is completed. The automatic operation of the starter is divided into two kinds of direct starting and decompression starting. The commonly used direct starter is electromagnetic starter, which has the function of loss of pressure and overload protection. Direct starters and two kinds of irreversible and reversible. The non reversible starter can only complete the starting and stopping of the motor; the reversible starter can accomplish the forward rotation starting, reverse rotation starting and stopping function. The automatic pressure relief starter has the self coupling decompression starter, the frequency sensitive starter and the integrated starter.