Terminal block looks simple, but the Terminal is also necessary to pass strict validation of goods produced type test and periodic test. Mechanical function of the terminals, electrical function of content, approach and conclude that specification.
One: mechanical function torque quiz
Torque test was intended to test the screw is there to meet the mechanical strength, ensure that pressure does not render the surface, slip, in the process, if the screws after the quiz has not been split, deformation, damage to the screw head slot does not affect continued use of imagery, it is qualified. Line reliability test line experiment was intended to test the terminal line without excessive damage to the wire. Terminal access rule type, and the extra cross-sectional area of the wire, hung up a certain amount of weight, speed, test, if the wires slipping out terminals nor in the clamping parts are close to cracking, crimping of terminals but qualified. If there is crack may fall out of the terminals of the wire clamp organization, you are not qualified.
Two: drawing experiment
Drawing experiment was intended to test terminal blocks terminal blocks can be clamped between metal surfaces. Terminal access rule type, and the extra cross-sectional area of conductors, used a certain amount of force, pull the wire toward the axis of the wire, if falling out of the wire from the Terminal, is a qualified mechanical strength, mechanical strength experiment was intended to test the Terminal is there to meet the mechanical strength, especially the shell Terminal is there to meet the test of mechanical strength. In the testing process, 1 barrel of the sample into the test device, rotating at a speed of 5 revolutions per minute, it's time to 5 minutes after shutting out sample surveys, if the Terminal is not damaged, housing no cracks, damage, you are qualified. Mechanical life test of mechanical life test was intended to test Terminal elastic element can accept a certain number of plug or other use of machinery, such as spring-type Terminal button press and release. If the elastic components assembled to the terminals of the test, mechanical and electric utility shall meet the requirements, you are qualified.
Three: touch resistance Terminal electrical function test
Experimental touch resistance tests are tests of Terminal static touch function, namely touch resistance should not exceed certain values. Experimental power-frequency withstand voltage test power frequency withstand voltage test Terminal shell should be able to rule of transient or short-time power frequency over voltage. At the time, no flashover or breakdown of representation. Impulse withstand voltage impulse withstand voltage experiments test Terminal shell should be able to accept the rules of transient overvoltages. Experiments should not be damaged in the process of discharging. Voltage drop test voltage drop is the test blocks of dynamic touch function. Voltage drop should be no more than a certain amount of value. Temperature rise test in normal operation, the temperature-rise test is the test blocks, its temperature rise does not exceed the rule value, usually standard rule when terminals after current, and its temperature increases cannot exceed the ambient temperature. Qigong with high and low temperature laboratory experiment is a test for qigong Screwless-type terminal when in normal use, the reliability of its electric utility. The terminals have suffered the final cycle of the voltage drop must not be greater than the value. Terminals use the existing path terminal interface skills, and mounting of electronic components to form circuits, end the process of electro-optical transmission coupling. Automatically manipulation of Center is manipulation unit has necessary and each sensor and Executive device reliable to across from, Terminal can very good to end this a function, and ensure site signal and electronic manipulation equipment by needs of low voltage phase match, also can made process manipulation of perimeter equipment and manipulation, signal and regulator equipment Zhijian of interface components, and applies Yu not as of voltage and power scale.