The introduction of electric wire and cable

Wires and cables used to transmit electric (magnetic) energy, information and realize electromagnetic energy conversion of wire products, wire and cable generalized also referred to as the cable, special cable refers to insulated cable, it can be defined as: aggregate is composed of the following parts; one or a plurality of insulated wire core, and their respective may have the coating layer, the total protective layer and the outer protective layer, the vga cable can also have additional no insulation of conductor. For the transmission of electric (magnetic) energy, information and realize electromagnetic energy conversion of wire products.
General electric wire and cat6 patch panel is also referred to as the cable, special cable refers to insulated cable. It can be defined as, aggregate is composed of the following parts: one or a plurality of insulated wire core, and their respective may have a coating layer, the total protective layer and the outer protective layer, the cable can also have additional no insulation of conductor. The main features of products: pure metal conductor, no insulation and sheath layer, such as steel core aluminum stranded wire, copper bus, electric locomotive line; processing technology is the pressure processing, such as melting, rolling, drawing, stranding / pressing twist; products are mainly used in suburban, rural, user the main line, switch cabinet etc..

Short HDMI extension cable problems and sloves

Short HDMI crossover ethernet cable (I use this is because I have a Raspberry Pi installed in the chassis).
Whenever I use the cable, I quit a simulator, the screen goes blank. RPI index is still alive, because I can connect to it via SSH.
If I remove the extension cord, plug only ordinary cable, there is no problem.
I did some tests using sudo 'in / opt / VC / bin / tvservice-s', I also found that the resolution does not change back to 1280 × 720, the simulator exit. Stay at 640 × 480.
My extension is 1.3A rated specifications (print) and my mini HDMI cable does not specify any (old). The signal will be cut off at random to my monitor, and refused to pass my HDMI Ethernet extension to the TV to watch.
I changed it up a 1.5 m 1.3 Specifications Rated cable and I have no problem with it.
In short, I will make sure that the HDMI cable is being used on behalf of all the games - no need to spend ££ on the line, though.

terminal block device for voltage requirements

Terminal confirm the selected power terminals to meet the power supply temperature range, the current and voltage requirements to help ensure long-term reliability of the system. In addition, if you choose the power terminal devices to meet the market requirements with a wiring technology, and to ensure user-friendly operation in the design, it will greatly increase the probability of success of the final product. Especially with  displayport 1.2 the effective wall thickness of high-density, extensive use of TC terminals, insulators increasingly thin. This insulating materials, precision injection molds and molding process and put forward a more restrictive and burdensome requirements. Due to the presence of a metal-insulator surface or interior extra material, terminal block surface dust, moisture flux, such as pollution, organic material precipitates and harmful gases adsorbed water film on the surface of the membrane and fuse to form ion conductive channels, absorb moisture, mildew, aging and other insulating materials reasons, will cause a short circuit, leakage, breakdown, poor insulation and low insulation resistance phenomenon. Wiring boards are generally the maximum current 10A Voltage 250V, plug and socket contact is the Department has resistance, current will flow through the heat, the maximum current of 10A refers good contact, the telephone connector  contact through the maximum current; Voltage 250V means wiring board insulation can withstand the maximum working voltage exceeds this value may leak. 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 terminal block can be fixed bridge pieces or insertion into the terminal wiring central cavity. The total separation of adverse swap terminals and other causes of excessive force, and it is a common disease. These types of failures are generally able to detect and eliminate the use of the pcb spring terminal block  inspection process. To make the accuracy of various electronic devices, high stability, in addition to a stable power supply, but also must have a stable reference potential. Insulated copper wire can be used as a larger cross-sectional area leads directly connected to one end of the reference potential, and the other end for electronic equipment DC ground. Anti-static grounding and shielding grounded to prevent static grounding intelligent building computer room within a dry environment to interfere with electronic devices carried called anti-static grounding. To prevent external electromagnetic interference, ground the shield electronic devices and equipment inside and outside the outer shell or worn metal tube, called the shield grounding.

WISDOM terminal block is a little drawback

"Interrupted multiple lines using Terminal" (especially touched electrical power, the current is large, the impact of heat on the line terminals working properly) need to pay attention, and the presence of risk.
Its long-term risks, terminal block is not short-term. Because of the time, on screw terminals will corrode, subject to thermal expansion and contraction, will naturally loose, copper oxide, and so some of WISDOM fiber optic connectors  the reasons, resulting in poor contact heat, and accidents.
Buildings should now minimize the use of terminals, whenever possible puncture clamp. Screw terminal called the Dragon three rotating terminal! Originated in the United States! After the production of imitation Taiwan! There are currently only in the production of Taiwan's Golden Pen!
Wire terminals for easy connection and it WISDOM rca cable  is generally used to connect the point source line clockwise twist in a very simple, terminal block is going to take a few shares of wires into the appropriate types of terminals connected together and tighten the wires wiring applications, it is actually some sealed inside an insulating plastic sheet metal, wire can be inserted into the hole at each end, for tightening or loosening screws, such as two wires, and sometimes need to be connected, and sometimes WISDOM scart splitter  need to disconnect, Then you can use the terminal to connect them, and can be disconnected at any time without having to weld them together or intertwined, it is convenient

barrier terminal block content and methods of detection

Current terminals connected technologies, including screw connection, spring connection, fast connection without stripping the three technologies, which represents the development trend of global connectivity technology. Rich variety of products are widely used in various industries on electrical equipment: electric power, petrochemical, automation, machinery, ships, railway transport, communications, building automation and so on. Terminal modular barrier terminal block are combined to form a different wiring from the application technique, should be widely accepted worldwide. There plug in terminal block  are music to analyze common problems on modular terminal inspection job. Modular terminal blocks test content and side 1) flag should model specifications, voltage, and the relevant certificates and other signs, and should be clear and correct. Refer to the model. 2) the appearance of colors to be consistent with the model, color uniformity, there should be no bubbles, scratches, damage, rust and other negative phenomena 3) barrier terminal block structure size measuring its height with a caliper, mounting holes, etc., should be consistent with the model structure size and installation requirements, using the wiring terminal screws must be plated, and subsequently installed smoothly, and can not slip off the screw phenomenon. All metal parts are not allowed to rust oxidation and other undesirable phenomena. Wire connection requires the use of brass studs, available magnet test, you can determine when the two do not attract as brass. 4) barrier terminal block the ability to take an examination (test terminals are specified) single wire diameter and a minimum diameter of the largest trials were within the range of bare 8-10mm, access terminals in the locking screw, use of 15N force could not pull the power cord, and swing up and  WISDOM mini usb connector down or left and right wires 5 batteries will not be cut off at the bottom of the terminal screw threads, wires or removal without incision shaped wire visually.
5) flame test (glow wire test) flame rating of 94UL-V0. Insulating material retaining live parts and external parts of insulating material providing protection against electric shock should be able to withstand the following tests: glow-wire test 650 ℃ in no visible flame, the flame goes out without any ongoing or after removal of the glow-wire in the 30S, combustion or melting, etc. should not fall under the level laid 200mm ± 5mm sample of tissue paper on fire or cause burning pine boards. Each batch sampling 1-3Pcs. 6) Heat test (ball pressure test) Isolation parts of insulating material Insulating material of the outer member and the fixed live parts should have sufficient heat resistance. Test Method: The test conditions for heating the chamber 125 ℃ heat resistance test, the surface should be placed in the test  dvi adapter component level, a steel ball with a diameter of 5mm 20N pressurize the surface of the test piece, if this surface is curved in the test , should be supported in the spherical part of the pressure, the ball is removed from the samples one hour, the sample was immersed in cold water to cool 10S, measurement of the indentation of a diameter not exceeding 2mm. Each batch sampling 3-4Pcs.

Resolve on terminal block rated voltage, rated current

With the innovative connection technology, more and more connectivity products are widely used in research and development by one, the common terminal on the market today have a rail terminal blocks, PCB terminal blocks, spring-type terminals, and so on.
For terminal block itself, rated current, rated voltage of two cognitive attributes is essential, there are two attributes do the music for this specific analysis: Rated voltage, also known as operating voltage, it mainly depends on the insulating material used in the machine even , the  WISDOM printer usb cable spacing between the size of the contact pair. Some components or devices at less than its rated voltage, may not fulfill its proper function. Rated voltage terminals should be understood as a matter of fact manufacturer recommended maximum operating voltage. In principle, the terminal row below the rated voltage can work. I tend According terminals withstand voltage (dielectric strength) indicators, in accordance with the use of the environment, the security level required for the rational use of the rated voltage. In other words, the same pressure indicators, depending on the use of environmental and safety requirements, can be used to different maximum operating voltage. It is also more in line with the objective usage.
Rated current, also known as the operating current. terminal block with the same rated voltage, lower than the rated current WISDOM displayport cable  situation, terminals generally work well. In the terminal design process, is through terminals designed to meet the thermal requirements of the rated current, because the contact to have the current flows due to the presence of conductor resistance and contact resistance, exposure to heat will. When it exceeds a certain limit heat will destroy the insulation and terminals form contact softening of the surface coating, resulting in failure. Therefore, to limit the rated current, in fact, want to limit the terminal block inside  WISDOM barrier terminal block temperature does not exceed the design value. In the choice of when to pay attention to the question is: for multi-core terminals, the rated current must be derated. This should cause a large current situations in importance, such as φ3.5mm exposure to the general provisions of the rated current of 50A, but in five core derated to 33% of the time used for each core is only rated current 38A, Number of cores The more, the greater derating.

barrier terminal block works in the refrigerator thermostat

Temperature controller is based on the principle of pressure to push through and break contacts. It consists of a bellows, temperature of the (test tube), the eccentric wheel, a jog switch or the like to WISDOM cat6 ethernet cable  form a sealed system and a sensor signal power transfer system. barrier terminal block control method is generally divided into two types; one is from the object to be cooled to a temperature change of control, the use of the vapor pressure type temperature controller, and the other by the object to be cooled to the temperature change is controlled, multi-use electronic temperature controller. Mechanical divided into: vapor pressure thermostat, liquid expansion thermostat, thermostat gas adsorption, metal expansion thermostat. Where the vapor pressure type thermostat is divided into: inflatable  WISDOM Micro USB cable type, liquid-gas and liquid-filled hybrid type. barrier terminal block home air conditioners are in such a mechanical thermostat based. Terminals in the refrigerator thermostat temperature sensor on the environment through automatic temperature sampling, real-time monitoring, control circuit starts when the ambient temperature is higher than the control settings, you can set the control back to the poor. If the temperature is still up, when the temperature rose to limit alarm set points, start limit alarm function. When the temperature control can not be effectively controlled in order to WISDOM rj45 wall socket  prevent destruction of the device can also be stopped by tripping device functions continue to run. Mainly used in the power sector using a variety of low voltage switch cabinet, dry-type transformers, box-type substation temperatures and other related fields.

Some questions about the phenomenon of high-temperature heat treatment of the terminal block

Terminals in the column without air gap magnetic system, residual magnetism is too large. The remanence of the pole faces at the gap to the file part of the gap is 0.1-0.3mm, or in parallel with the coil ends of a capacitor 0.1uF. Enable the surface of a core of a contact period of time after the oil or greasy. The core surface rust oil terminals clean, iron surface  keystone jack should be smooth, but not too light, otherwise it is easy to cause delay release.
Throughout the assembly process, must withstand the high temperature and the preheating zone to a temperature by conduction wave soldering the terminal body. Flux shall not affect the terminals, must be easy to remove, can not have any residue. The entire assembly process must be cleaned with water. Preheat temperatures often reach 100 ° C or higher, the peak temperature of 280 ° C are not uncommon. Perforated solder pin must be accurate positioning, size appropriate, balanced place, and have good weldability, this will help the terminal insertion and welding.
In the course of the entire assembly terminals must withstand high temperatures generated by the impact of heat treatment, mainly used in welding preheating and convection preheat the heat conduction to the rca video cable  solder pin and solder to melt tin plate interface. Robust contact welding performance when starting the motor or short-circuit, high current to make contact. Weld head can not be released, with silver contacts easier welding. AC contactor main contacts should be used in anti-welding ability of silver-based alloys, such as silver iron, silver and nickel.
The optical fiber communication (transmission) chain, in order to achieve different terminal modules. The connection between the device and the need for flexible systems, must be able to have a removable (active) device connected between the optical fiber and the optical fiber, the WISDOM cat5e patch cable  light path can be transmitted in the desired channel, and to achieve the purpose of the completion of a predetermined or desired and requirements of the device to achieve this function is called connector. The terminal end faces of the two optical fibers is a precision docking, so that the light energy emitted by the fiber to maximize the output optical fiber coupled to the receiver to enable the optical effects due to its involvement in the system caused by the link and to minimize This is a basic requirement fiber terminals

WISDOM terminal block from the initial progress of Ethernet technology in Xerox Palo Alto Research Center, one of the

Initially progress Ethernet technology pioneer technology projects from many Xerox Palo Alto Research Center in one. People often hdmi to dvi adapter think that Ethernet was invented in 1973, when Robert Metcalfe (Robert Metcalfe) PARC to his boss wrote a memo about Ethernet potential. But I think Metcalfe Ethernet only appeared after a few years. In 1976, Metcalfe and his assistant David Boggs published an article entitled "Ethernet: Distributed local computer network packet switching technology," the article.micro usb connector End of 1977, Metcalf and his collaborators received a "collision detection with multi-point data communications system" patent. Multi-point transmission system is called CSMA / CD (Carrier with Collision Detection Sense Multiple Access), from logo Ethernet birth.