English Views: 2 Author: Site Editor Publish Time: 2021-12-06 Origin: Site
Screw type waterproof connectors, as the name implies, can be applied to the environment with water, to provide a safe and reliable connection. At present, the market is screw type waterproof connector brands and types, but in the real sense, with excellent sealing performance, safe and reliable quality of waterproof connectors, the market is still relatively small. Here we will see the advantages of a screw type waterproof connector!
Here is the content list:
Environmental performance
Mechanical performance
Electrical performance
Screw type waterproof connectors common environmental performance, including temperature, humidity, salt spray, vibration, and shock.
Temperature: the current maximum working temperature of screw type waterproof connectors is 200 ℃ (except for a few high-temperature special waterproof connectors), with a minimum temperature of -65 ℃. As the screw type waterproof connector work, the current at the contact point generate heat, resulting in temperature rise, so it is generally believed that the working temperature should be equal to the ambient temperature and the contact temperature rise and the sum. In some specifications, specify the screw type waterproof connector in the rated operating current to allow the maximum temperature rise.
Salt spray resistance: screw type waterproof connector in the environment containing moisture and salt work, its metal structure, contact parts surface treatment layer may produce galvanic corrosion, affecting the physical and electrical properties of the screw type waterproof connector. To evaluate the ability of electrical waterproof connectors to withstand this environment, the salt spray test is specified. It is a screw type waterproof connector suspended in a temperature-controlled test chamber, with a specified concentration of sodium chloride solution sprayed with compressed air to form a salt spray atmosphere, the exposure time specified by the product specification, at least 48 hours.
Vibration and shock resistance: vibration and shock resistance are an important performance of screw type waterproof connectors, in special applications such as aviation and aerospace, rail and road transport are particularly important, it is an important indicator to test the robustness of the mechanical structure of the screw type waterproof connectors and electrical contact reliability. There are clear provisions in the relevant test methods. Shock test should be specified in the peak acceleration, duration, and shock pulse waveform, as well as the time of electrical continuity interruption.
Resistance to moisture intrusion will affect the screw type waterproof connector connection h insulation performance and rust metal parts. Constant damp heat test conditions for relative humidity 90% to 95% (according to product specifications, up to 98%), temperature +40 Shi 20 ° C, the test time by the screw type waterproof connectors, a minimum of 96 hours. Alternating heat and humidity tests are more severe.
As far as the connection function is concerned, the plugging force is an important mechanical performance. Insertion force is divided into insertion force and pull-out force (pull-out force is also known as separation force), the requirements of the two are different. The relevant standards have a maximum insertion force and minimum separation force provisions, which indicates that the use of screw type waterproof connectors from the point of view of the insertion force to be small (thus having a low insertion force LIF and no insertion force ZIF structure), and separation force if too small, it will affect the reliability of screw type waterproof connectors contact.
Another important mechanical performance is the mechanical life of screw type waterproof connectors. Mechanical life is a durability (durability) indicator, in the national standard GB5095 called it mechanical operation. It is inserted and pulled out once as a cycle, to the specified plugging cycle after the screw type waterproof connector can normally complete its connection function (such as contact resistance value) as the basis for judging.
Screw type waterproof connector plugging force and mechanical life and contact structure (positive pressure size) contact parts plating quality (coefficient of sliding friction) and the contact arrangement size accuracy (alignment) related.
The main electrical properties of screw type waterproof connectors include contact resistance, insulation resistance, and electrical strength.
(1) Insulation resistance. A measure of electrical waterproof connectors between the contact parts and between the contact parts and the shell insulation performance indicators, the order of magnitude of hundreds of megohms to thousands of megohms ranging.
(2) Electrical strength. Or voltage resistance, dielectric withstand voltage, is a characterization of the screw type waterproof connector between the contact parts or between the contact parts and the shell of the ability to withstand the rated test voltage.
(3) Contact resistance. A high-quality electrical screw type waterproof connector should have a low and stable contact resistance. Screw type waterproof connector contact resistance from a few milliohms to a few - ten milliohms ranging.
Shenzhen Bett Electronic Co., Ltd custom screw type waterproof connector, waterproof connector, waterproof male and female plugs, solder type/lock screw type waterproof connector, waterproof connection cable, non-detachable waterproof plug cable, - tow six waterproof cable, T-tie waterproof connector, waterproof signal cable, waterproof power cable, LED street light waterproof cable, LED guardrail. Waterproof tube cable, waterproof plug cable for LED street light power supply, waterproof fuse box for car, and other products of various specifications. I believe there must be the one you want!
