terminal block performance testing process

Terminal shape looks simple, but the terminal must also undergo rigorous

testing and product validation experiments cyclical production patterns .

This paper describes the content of the mechanical  HDMI CABLE properties of terminals

, electrical properties , methods and criteria .
A mechanical performance test
An object of the torque test (Tightening Torque Test) test is to test the

torque screw has sufficient mechanical strength to ensure that during the

phenomenon does not occur in the pressure line of the slide wire , if the

screw is not broken after the test , deformation of the screw head groove

did not affect the continued use of the RAC CABLE  phenomenon of corruption , it is

qualified .
2, the pressure line reliability test (Secureness TeST) pressure line

reliability test purpose was to test whether the terminal to clamp the

wire but not excessive damage wires. Terminal connected to the specified

type and nominal cross-sectional area of the wire , hang some weight to 10

revolutions per minute (10 ± 2r/min) the speed of rotation, continuous

15min. After the test , if the wire does not slide clamp terminals , there

is no break in the vicinity of the clamping member , the pressure line

terminal reliability is qualified. If there is a wire break or fall off

the terminal clamping mechanism , it is unacceptable.
3, the pull-out test (Pull Out Test) pull-out test is designed to test the

wire terminals can be firmly clamped between metal surfaces. Specifies the

type of the access terminal and rated sectional area of ​​the wire , the

choice of a certain force (lkgf), in an axial  Network Cabinet direction of the wire to

pull the wire , kept 1min. If the wire does not fall out of the terminal ,

it is qualified .
4 , the mechanical strength test (Mechanical Strength Test) The purpose of

the test is to test the mechanical strength of the terminal has sufficient

mechanical strength , especially if the test terminals of the housing has

a sufficient mechanical strength. During the test , the sample was placed

in a drum test device, 5 the rotation speed rpm , for 5 minutes after the

sample was taken off was observed , if the terminal is not damaged , the

housing cracks , damage, etc. , is qualified .
5 , the mechanical life test (Fatigue Test) Mechanical life purpose is to

test the elastic component test terminals , can withstand a certain number

of plug or other mechanical operations use, such as compression and

release the spring-loaded terminal buttons. If the elastic element to the

terminal after the test assembly , the mechanical and electrical

performance should meet the requirements , it is qualified .
Second, the terminal electrical performance test
A contact resistance test (CONtactResistance) contact resistance test is a

static test terminal contact performance , that the contact resistance

should be less than a certain value .
2, the power frequency voltage withstand test (Power-Frequency Withstand

Voltage Test) frequency voltage withstand test is to test whether the

order of the terminal housing provisions should be transient or short-time

power frequency overvoltage . During the trial , with no breakdown or

flashover phenomenon .
3 , impulse withstand voltage test (Impulse Withstand Voltage Test impulse

withstand voltage test is the test should be able to withstand the

specified terminal case transient overvoltage . Trial process should be no

disruptive discharge .
4, the voltage drop test (Voltage Drop Test) is a dynamic contact voltage

drop test performance test terminals. The voltage drop should not exceed a

certain value .
5, the temperature rise test (Temperature Rise Test) test is a test

terminal temperature rise during normal use, the temperature can not

exceed the specified value , usually UL standard terminals through the

current , the temperature rise should not exceed the ambient temperature

of 30 ℃.
6 , high and low electrical performance test (Electrical Performance Test)

test is a test without electrical performance during normal use, the

reliability of the electrical properties of screw-type terminals. The

terminal is subjected to 192 cycles, the voltage drop and the first 24 in

the last cycle is not greater than a certain value ....

Screw terminal block desoldering reason

Fixed welded screw-type terminals for current smaller, less heat occasions, otherwise overheating effect leads to solder melts, there is the risk of a short circuit. Terminals are generally used for the wire  WISDOM fiber optic cable crimping head can not be used for welding or soldering is not suitable for the case of relatively high heat.
Screw terminals desoldering reasons:
Terminal 1 you this element out of the problem with the component pin Weld weldability no relationship
2 because of the weight on one side and the other side of the pin elements ranging, components during reflow soldered pin side tilt caused
3 You can try to change the frequency of large WISDOM hdmi wall plate  aeolian reflow point you should be improving
4 Set the oven temperature is not good, the temperature climbs too slow, set to peak above 250 degrees
5 steel mesh hole a little longer
6 Q. pin terminal block manufacturers deck plating is the first or the first cut off and then re-plating, tin processing the latter will be much better
7 terminals this issue and our product is very similar to the WISDOM Mini HDMI cable  previous one, fixture alone is not enough, because your PCB board itself will have a deformed foot will cause the part to be raised, causing air welding.
In the back of your fixture, with heat tape on the PCB fixture fixed to prevent it from feet to lift the parts to try.
Meanwhile, you can stencil below this row Pin hole location near the foot plate sticker affixed to add a layer of tin, this situation would rather not even empty tin solder

Important factors affecting the selection of the terminal block

1 Appearance factor
Although the "power terminals" The name does not sound nice, but many companies have considered it in terms of appearance and affinity users have played an important role. Power terminals must be easy on-site installation, as they are often mounted on the front panel is easy to  WISDOM Terminal BLOCK see the product. Thus, marketers often want the appearance of power terminal products have a certain voice. But often encounter this situation: engineers design products meet the requirements of all mechanical and electrical parameters, but because the request does not meet the sales had to be changed. If this happens in the final design cycle (often the marketing department when first saw the prototype), then a fierce debate would be difficult to avoid, and may result in increased costs and delivery delays. In many industrial control systems, terminals are often one of the few parts of the few technicians need extra attention. Although its user interface is relatively simple (mainly screws), but it is very important for the normal operation of the device is. In general, as the current increases, the wire becomes rough, and the fastening torque of the  WISDOM HDMI CABLE coarse wire to the terminal also needs to increase needed. Therefore, the need for greater power terminal screws and more robust insulating housing. Sometimes using a small screw to save space. In a very compact product terminals often the case. Some wire diameters up to 1/4 inch or more, and therefore difficult to deal with these small screws. When technicians and maintenance staff need to install multiple lines, using a large enough screws to simplify the connection work can greatly save time. It was also an engineer in the design process to hear the views of marketing departments seem so important as soon as  WISDOM Displayport CABLE  possible. If the terminals must be properly polished or the use of appropriate colors, then as the original product requested by these parameters than at the end of the development cycle to adjust them much easier.
When the terminal is used for consumption (such as high-end stereo products) products, the appearance becomes increasingly important. In fact, some designers tend to specify the terminal device for audio equipment were plated, so that despite an increase in costs and does not significantly improve performance, but it does improve the appearance of the gold-plated products.

On the barrier terminal block at the edge with the best equipment in low-voltage application requirements

A comprehensive consideration of the terminal equipment of low pressure working environment , the impact of the best edge with roughly the following factors:
Rated voltage and related equipment ; rated the WISDOM Terminal BLOCK  best edge voltage ; by the device during operation overvoltage rated impulse voltage is determined . Another environmental conditions such as: temperature, humidity, solar radiation , heating, ventilation , dust, water vapor , etc. ; Other factors such as: pollution, material properties ( tracking index CTI), voltage action time , frequency , altitude ( atmospheric pressure ) , electric fields , uniform electric field ; non-uniform electric field. 2 , terminals make the edge of destruction and influencing factors
One of the best edge breakdown ( thermal breakdown ) that is under the strong electric field , electric internal media due to dielectric loss and fever , too late if the heat loss, the temperature rising, resulting in the escape of low molecular weight volatiles leaving the material molecular structural damage, finally resulting in the best edge breakdown ; make the edge of breakdown factors: temperature - temperature, humidity breakdown voltage of the material drops - the humidity increases, the breakdown voltage of the voltage drop of materials - the role of time voltage is applied to increase the time , the breakdown voltage drop material frequency - frequency progress, material breakdown voltage drop material thickness - material thickness progress , heat adverse , the other is to make the breakdown voltage drops that make the edge of the edge of aging in a variety of materials during the operation of the device the following factors , the occurrence of physical and chemical changes irreversible, leading to dramatic changes in electrical materials , mechanical properties and damage , for the best edge aging. Such as: thermal aging , although the insulating material alone or in combination in the heat, oxygen , water , low molecular weight product or escape of volatiles ; inherently radical chain reaction so that molecular chains involved ; acceleration caused material damage autocatalysis ; produce hydrolytic degradation ; or a polymer chain polymer produced , leading to performance  WISDOM utp cable degradation or complete destruction of materials ; electrical aging Further , since O3, nitrogen oxides, and other high-velocity particles of a partial discharge and partial discharge caused by the increased dielectric loss resulting material heat, resulting in performance degradation or complete destruction of the material make the edge of the aging factors: the electric field strength - the electric field intensity increases, the material to make the edge accelerated aging temperature - temperature increased, the best edge humidity will accelerate the aging of the material - the humidity increases, the material will accelerate the aging of the best edge frequency - the frequency increases , the best insulating material will accelerate the aging of pollution - pollution can cause partial discharge , although summary edge accelerated aging of materials used to make from the edge with low-voltage electrical equipment in the terminals electrical insulating material to make far greater than the strength of the electrical strength of air , so when the terminal to make clearances conducted mainly the edge of the design , the method should be used creepage interval , ie between the  WISDOM VGA CABLE two conductors to make a solid increase edge isolation. One solid insulating material because of defects ( such as impurities, air gap ) is present, although still much less than the breakdown voltage level, but still partial discharge is generated due to the damage of its life . One solid insulating material with a process of accumulation of damage in the course of its life , can not recover the process will eventually lead to the breakdown or aging and loss performance. In the high-frequency voltage is applied , the material dielectric loss and partial discharge will decrease the life intensifies . Simply by increasing the capacity of the terminal to make the thickness of the edge structure in order to obtain long-term differences withstand voltage is suitable only be met through reasonable structural design effect only . Specific to the design method must determine the minimum clearances ; minimum creepage interval ; Or add some secondary measures: applying the best insulating material ; retrofitting to make the edge to make the casing or liner edge ; exhibition to make border membrane lining ; pollution and moisture and so on.

barrier terminal block in the mated state can guarantee the safety of electrical connection between the

 Disintegration refers to abnormal separation between terminals in the mating condition, due to the materials, design , technology and other structural causes of unreliability caused by plug and socket between pin and socket will cause power transmission and control systems interrupt signal control serious consequences . As the design is not reliable, poor WISDOM utp cable  quality selection process error , improper selection molding process , heat treatment, mold , assembly , welding , etc., will cause the assembly is not in place , such as fixed bad . In addition, since the coating peeling, corrosion , bumps, Molded flash, rupture, contact processing rough, poor appearance deformation causes, due to positioning the lock with the size of the ultra-poor , poor processing quality consistency and total separation of excessive force big bad swap and other causes , is also a common disease . These types of failures are generally able to detect and eliminate the use of the inspection process . Terminals can be mounted side by side on of 1 mm to 4 mm thickness of the WISDOM VGA CABLE  panel , such as adjusting the thickness of the panel can automatically compensate for distance , the composition of an arbitrary number of poles of the terminal block , and can be used to increase the air gap separating plate and creepage distances . Air flow sensor , an L -type ( mass flow type ) electronic fuel injection engine in one of the main sensor. It tests the flow of air into the cylinders of the engine is used to determine the basic injection duration and the important parameters of the basic ignition advance angle . Thus , fault detection and analysis of air flow sensor monomer is essential for EFI engine . Leaf plate air flow sensor is mounted between the air filter and the throttle body so as to accurately measure the amount of intake air of the engine. In engine control, in order to accurately draw the engine air mass flow required , the WISDOM mini usb cable  density of the air needs to be considered , with the density of the air temperature of the air pressure changes . For more than one section of the terminal is equipped with a uniform level of accessories such as side panels, grouping separator , and so on. Potential distribution can be fixed bridge pieces into the terminal edge of the central or insert plug -in bridge wiring cavity to achieve. Consistent with the general shape of the ground terminal and N- terminal line breaking slider terminals , using identification system , can achieve a unified identity.

reasons for poor solder terminal block where

Screw -type terminal requires a fixed by welding to the electrical wiring part in the operation , but this operation may be due to improper operation , or the material is not generated on the tin soldering phenomenon , the text for the poor solder terminals several common reasons for the order.
1 Terminal tin-lead plating solution contamination ;
(2) excessive gloss agents, resulting in excessive  WISDOM Displayport CABLE carbon content in the coating ;
3 after plating bad ( liquid remaining shuttle , poor water quality , salt production, foreign body attachment ) ;
4 adhesion bad ;
5 plating voltage is too high , causing thermal oxidation plating , passivation ;
6 current density is too high, caused by poor coating structure ;
7 terminals stir bad , bad cause the coating structure ;
8 bath temperature is too high, caused by poor coating structure ;
9 coating due to poor placement environment , time  WISDOM Terminal BLOCK is too long , causing the coating oxidation and aging ;
10 terminal coating is too thin ;
11 solder temperature is not correct ;
12 plating structure affects the shape ;
13 high flux of impurities ;
14 plating material impact on the ( tin > tin-lead > Gold > Cu > phosphor bronze > Ni > Brass ) ;
15 bath bad ;
16 organic impurities ;
17 foreign metal impurities ;
18 nickel layer passivation ;
19. Total Metal too .
Terminals using a common modular terminal blocks with  WISDOM Mini HDMI cable screw connection , screw connection is still the mainstream of industrial connection technology , terminals no other connection methods to get such a high pressing force in the smallest space.

insulator material barrier terminal block used

Data transfer is not current fluctuations through, but by pulsating waves, using a special optical fiber as the medium. From the output port fiber terminal blocks, you can see the red light, it is not a WISDOM HDMI CABLE  laser, nor be harmful to the human eye. Dirt and dust hinder the transmission of light, so do not touch the connector when used, they also do not want dust caps to the port, in addition, fiber optic cable can not bend excessively distorted, otherwise it will cause permanent damage can not be used. Optical and electro-optical fiber terminal requires two conversions, will inevitably lead to loss of the phenomenon, but unlike copper fiber susceptible to electromagnetic interference, the long-distance transmission can have a better guarantee. Same element group, before the number preceded by the letter, if not necessary to distinguish phase, available digital-5N, -2.5, -16 mark.
Factors affecting the appearance of terminals: Terminal affinity in terms of appearance and the user have played an important role, power  WISDOM RAC CABLE terminals must be easy on-site installation, as they are often mounted on the front panel is easy to see the product. Thus, marketers often want the appearance of power terminal block products have some say. Rated cross-section to the preferred terminal series 10mm2, the pressure drum lifting frame structure are used. Their role is based on the principle of so-called "lift cylinder principle" as the basis. When tightening the screws, the WISDOM hdmi wall plate  screws on the top of the conductor leaving Clamp upward movement, thereby Clamp the wire conductor and eventually tie tightly clamped. Since UK terminals can have a high contact force electrical conductor wires embedded in a soft tin plating layer. Tighten the screws to increase the lift cylinder shaped elastic. In order to meet the high temperature, low temperature, flame retardant, to ensure stable and reliable part geometry. Terminal block insulator mostly using thermoset molding. Interface seal body with silicone rubber seal line body molding and other molding. Preloaded - pin jack is touching the body, collectively, into welded, crimp and fit around, etc., used for electrical connections.

Applications range of terminal block

Now there will be the best day of outdated technology, the ever-changing technology is an inevitable trend, science and technology from social practice, serving the social practice of modern science is booming along the direction of getting better, the changing of the times, technology innovation, science and technology that we humans have been on the road  WISDOM HDMI CABLE constantly explore, filled with challenges and obstacles on this path. Every era of progress will make us pleasantly surprised, innovative things are big and small, some things, though small, is not a small effect, as the terminals, a simple device consisting of plastic and metal, so that the electrical and mechanical industry is extremely useful. So what is the terminal it? In fact, while the terminal in order to facilitate the application of the wire connection, it really is a piece of plastic inside sealed in insulated metal sheet has holes at both ends of the wire can be inserted, tighten or loosen the screws, two wires for example, need to be connected or when disconnected, the terminal can connect or disconnect them, without having to weld them together or twisted together, it is convenient. Suitable for a large number of wires each link in the power industry have a special terminal block, terminal boxes, terminal blocks is above all, there is a single layer, double-decker, there are current, voltage, there are ordinary, there etc. can be broken. A crimp in order to ensure reliable contact with the area, and to ensure a sufficient current through. In a word, the terminal occupies an important position in the course of the operation of the machine, and the terminal block must comply with labeling, in order to avoid accidents.
Entertainment is now totally dependent on the work of human life power, no electricity, live entertainment will interrupt the work, it will stagnate. Mobile PC cameras, as well as many other digital electronic products and home appliances products. Common characteristic of these products is the use of electricity, the most important is that they are equipped with WISDOM mini usb cable a variety of lines, black and white, long, short, thick fine. Power cable, data cable, cable to connect a variety of electronic products that we need to use them to work properly, in order to achieve perfect our services and features you want.
These kinds of lines, they have a port, which is the use of these ports and a variety of devices to be linked. For example, cable, there are two crystal head, a connection switch, a connection to our computer. Crystal Head is a terminal block. USB data line interface is also a connection terminal. Chargers end link power, the other end of the link computers, cell phones, MP3 MP4, these ports are equally high current terminals. Types of terminals has thousands of terminals is only one well-known brands on the answer more than  WISDOM RAC CABLE three thousand kinds.
In addition to computers, digital products, home appliances, etc. all connect the power plug or the port can be called terminals. Large areas of the terminal application is astounding. Terminals in everyday life has reached the point where everywhere. Therefore, the terminal market is very large, Cixi ConocoPhillips Electronics Co., Ltd. is one of the major connector suppliers have their own R & D and manufacturing base, the main products are: terminal blocks, terminals, and all kinds of electronic connectors .

barrier terminal block connector technology to open the door

Terminals are intermediate products of electronic information industry , most products are directly linked to the connector , the speed of its development, technology and production scale are achieved , not only directly affects the development of the electronic information industry , but also affect the connector development , but also for the development of information technology to transform traditional industries and improve the WISDOM HDMI CABLE  modernization level of equipment, the promotion of scientific and technological progress have a profound impact. Terminal manufacturers continue studying the development of new technologies , in order to increase their core competencies to meet the application needs of the market in the face of fierce competition in the terminal market, the only scientific management , strict quality control , continuous improvement in order to obtain customers agree. With the change of product homogeneity and trade environment , competition between terminals manufacturers gradually competition from product quality , cost-effective customer service competition to competition . Due to the WISDOM Displayport CABLE  continuous advancement and development of technological innovation and technological change , technological barriers in the terminal products manufacturing , quality control barriers constantly , gradually being broken between the production company's products are moving homogeneity, low the direction of development costs for manufacturing enterprises, "customer service" will be the most significant competitive focus. Service well, naturally able to get the user's recognition of its excellent market position will be the case because of customer service and continue to make a difference .
The connector terminals technology constitutes a new connector products, namely push-in connector , it is mainly used for system -level interconnect , its biggest advantage is no cable , installation and removal simple and easy field replacement , and mating speed fast, smooth and  WISDOM mini usb cable stable separation , get a good high-frequency characteristics for spacecraft . Connector assembly technology is developing toward the surface mount technology by the plug-in installation technology , and the future trend is towards the development of micro- assembly technology , the use of micro-electromechanical systems will be improved connector technology and cost-effective power.