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As a designer of anti-induction lightning engineering, a technologically advanced manufacturer should be selected. The product should have detailed specifications, technical indicators, place of origin, standard certificates and sales licenses in all aspects. The specific items are as follows, for your reference only.
(1) Whether the design is beneficial to the user and easy to install the ideal product should be small, compact and can be installed in an existing space while being easy to install.
(2) Reaction time The surge protector must react faster than the surge. The reaction time meets the technical requirements at the nanosecond (nanosecond) level.
(3) Maximum current maximum current that can be processed at a time (ie, peak current) refers to the ability of a surge protector to handle the maximum current. Bell Core Labs (a research facility at AT&T-Bell Laboratories) conducted extensive research to protect its highly computerized experimental center, determining the ability of the surge protector to handle the maximum current and the required technical parameters. The Qian'an surge protector can meet the requirements and play the role of preventing surge and protecting equipment. It can be seen that installing an 80 kA surge protector at the branch line power supply box in any building is enough to solve any possible surge problem. For valuable electrical equipment in multiple lightning strike zones, a larger guard should be installed at the AC distribution box at the entrance of the building, from 160 kA to 400 kA.
(4) Ability to absorb energy The ability of a surge protector to absorb energy is measured in terms of joule. The higher the Joule value, the longer the life of the surge protector.
(5) The ability to clamp voltage is the ability to clamp the overvoltage to the safe range that electrical equipment can withstand. The computer is designed to be used within a certain voltage range, and if it exceeds this range, it will cause damage to the computer. Therefore, the surge protector must clamp the overvoltage to a safe level. The GA173-1998 standard, which was implemented on June 1, 1998, stipulates that the voltage of the computer lightning protection device (surge protector) for the 220/380 volt power system should be less than or equal to 2000 volts.
(6) The size of the volume is very important. As far as the surge protector is concerned, the size of the volume is very important. The internal inductance of the surge protector should be low. The larger the size of the protector itself, the greater the inherent internal circuit inductance. The protector itself is small in size, the inductance is small, and the protection effect is better. Another advantage of the small volume protector is that it can be installed close to the distribution box, because the connection itself has inductance, and the longer the connection, the greater the adverse effect on the protection system's limit level, so install surge protection. The closer to the distribution box, the better, preferably within 15 cm. It is impossible to install a large-volume protector in a small space of electrical equipment.
(7) In compliance with international and national standards, surge protectors shall comply with international standards, including UL1449, ANSI/IEEE, NEMA and IEC. There are also corresponding standards in China. The Public Information Network Security Supervision Bureau of the Ministry of Public Security requires that all lightning protection devices (herein referred to as surge protectors) used to protect computers must pass the test according to the GA173-1998 standard. Only after obtaining a sales license can you sell.
(8) Product reliability and customer list Understanding the customer list and the history of the manufacturer's production of the product helps to understand the reputation of the manufacturer and the reliability of its products.
(9) Quality Assurance The length of the warranty period reflects the manufacturer's confidence in whether or not the product can be used for long-term protection. Once a product has a problem, whether the customer can get a fast and free service is one of the factors that users should consider.
How to choose a data line protector with hundreds of different connector types, many different applications and procedures, and six different voltage levels, all of which affect the "what kind of data line protector I should buy" decision. But if you understand the following three important facts, it is not difficult to choose the protector that meets your needs.
(1) Transmission Voltage The exact transmission voltage in the application must be indicated on each order. A good surge protector whose ability to clamp overvoltage should be as close as possible to the rated transmission voltage of the instrument being protected. The first step in selecting a data line surge protector is to determine the device's transmission voltage, which can be found in your device manual, but don't guess if you don't know. It can be easily measured with a voltmeter. The table below shows the voltages normally set by the application. Voltage System Applications 7.5 V RS422, RS423, RS485, Ethernet, Most LANS Ethernet, and LAN 7.0 V Data Telephony (Channel Service Unit/Data Service Unit, DDS, T1, ISDN, etc.) 12 V Category 5, 100Base-T, ATM155 (100 MHz) 18 V RS232, Token Ring, digital 4-20 mA current loop 27 V ArcNet, analog 4-20 mA current loop 60 V analog, leased line telephone company 240 V dial Line, modem and fax machine.
(2) Connector type There are hundreds of different types of connectors used in data line applications around the world. The most common lists are as follows. If you think that one of you is not listed in the table below, we may also be able to protect it – just ask our engineers. Common Types of Protector Connectors - Co-axial Twin-axial RJ 11 RJ 45 Series 9, 15, or 25-pin Centronics Universal Serial Bus (USB Universal Serial Bus) Hard Wiring (no connector)
(3) Data transfer speed Data transfer is measured in millions of bits per second or megahertz. A protector for a 10 MHz application cannot work with a 100 MHz application. A protector designed to protect cable television coaxial cables may not work on a 1.5 GHz satellite transmission feeder. Many office applications are set to the 1 to 10 MHz range, but applications called Category 5 (running at 100 MHz) are becoming more popular. The data transfer speed can be found in your device manual and should be included in every order.