Resistance DT267A-4B-type safety performance of the technology and the principle of the technology and the principle of withstanding voltage tester voltage tester voltage tester resistance tester is generally referred to as a pressure tester, also known as electrical insulation strength tester called a dielectric strength test Miriam, also known as the dielectric breakdown of the device, the dielectric strength tester, high pressure experimental instrument, high voltage breakdown devices, pressure tester. A Stress Detector AC or DC high voltage is applied to the electrical live parts and live parts (usually the shell) to check electrical insulation materials can withstand the test pressure capacity. Appliances in the long-term work, not only to withstand the rated working voltage, but also to withstand the operation caused several times higher than the rated working voltage over a short time voltage is applied (the overvoltage values may be higher than the value of the rated working voltage) .
The effect of these voltages, the internal structure of the electrical insulating material is to be changed. When overvoltage strength reaches a certain value, the material insulation breakdown, electrical appliances will not run properly, the operator may get an electric shock, endangering personal safety. Electrical safety testing indicators include AC / DC voltage, insulation resistance, leakage current, grounding resistance. AC / DC voltage test is used to test the electrical safety performance of products under actual working conditions, is one of the important indicators of the testing equipment electrical safety performance. Withstanding voltage tester currently seen on the market using the GB4706 (equivalent IEC1010) standard, the use of more desktop structure of a single test indicator test instrument, can not meet the demand of user needs a comprehensive test of the Multiple Indicator; and resistance on the market pressure tester to use more traditional Stress Detector of testing, test accuracy is not high, the use of technology and performance gap with foreign advanced level, can not fully meet the needs of the current development of electrical safety testing. Therefore in line with the latest international standards, the use of advanced technology and better performance withstand voltage test system has an important significance.
Withstanding voltage tester structure and composition DT267AC programmed insulation withstand voltage tester voltage tester resistance technology and principle
(1) step-up part of the regulating transformers, step-up transformer and boost the power is turned on and composed of cut-off switch. 220V voltage by turning the cut-off switch to the regulating transformers regulating transformer output connected to a step-up transformer. The user simply adjusting the regulator can control the output voltage of the boosting transformer.
(2) the control part of the current sampling time circuit, the alarm circuit components. The control section when the start signal, the instrument immediately switched boost power. Upon receipt of the measured loop current exceeds a set value and audible alarm and boost circuit immediately cut off the power supply. When received reset or time to cut off the signal boost circuit power supply.
(3) circuit output voltage value of the display shows the step-up transformer. The display by the part of the current value of the current sampling time and the circuit time value is generally countdown.
(4) above is composed of the resistance of the conventional structure of the voltage tester. Computer technology, the rapid development of electronic technology and monolithic; programmed withstanding voltage tester developed rapidly the past few years, the programmed pressure instrument with traditional pressure instrument boost part. Programmable voltage meter high voltage boost is not adjusted by the regulator through the mains, but is controlled by the single-chip computer generates a 50Hz or 60Hz sine wave signal and then through a power amplifier circuit amplifies boost the output voltage value from a single the piece computer control, test security, test accuracy and convenience of the test is much higher than traditional pressure instrument gradually become the first choice of the user, and is recognized by more and more users.
Stress Detector technical understanding of the status of
http://steelpergolas.blogspot.com/2012/12/stress-detector-technical-understanding.html
没有评论:
发表评论