Insulation and voltage tester is also called electrical insulation intensity testor or medium strength tester.Exchange or DC high -voltage is applied to the test that the electrical electrical insulation material can withstand voltage resistance between the electrical electrical electrical insulation material between the electrical power part and the non -charged part (generally the shell).The insulation tester is suitable for the insulation test in the maintenance, maintenance, testing and testing of various electrical equipment.It is divided into two types: insulation resistance tester and insulation resistance tester.
Insulation test instrument model
Principles of insulation tester
1. AC and AC DC test transformer: Enter the operating box (or operating desk) of the industrial frequency power supply, and enter the voltage input to the test transformer primary winding by the autoclacty pressure device.According to the principle of electromagnetic induction, you can get industrial high -voltage in the secondary (high -voltage) winding.After the high -voltage silicon pile rectification and capacitor filtering of this industrial frequency, DC high -voltage can be obtained. The amplitude of the range is 1.4 times the effective value of the industrial frequency high -voltage.It is just that when using DC, you should draw a short pole, and when you use communication, insert a short pole.2. Bring a tap test transformer: In order to meet the contradictions between a higher voltage voltage at a higher voltage at the same time and the lower current, the high voltage winding is divided into two.The current with a small current, and then the two winding are connected in series.
How to use the insulation tester
1. Select the required test voltage of the switch of the rotating band.2. Instrument starts self -examination and initialize.3. Press or lock the test key, and the test number is automatically accumulated to start the test.At this time, the high -voltage state indicator and the high -voltage warning symbol on the LCD screen are lit and the instrument built -in bee tweezers emit a warning sound, which represents the LINE end of high -pressure output.The time logo symbol begins to flash.4. At this time, the LCD screen enters the test status display mode.5. The instrument emits a prompt sound every time (default-time1: 15 seconds, TIME2: 1 minute, TIME3: 10 minutes).6. Release the test key according to the test results (continuous testing, absorption ratio test, polarization index test).At this time, the instrument stops high -voltage output and automatically calculates and displays the test results (the resistance value, absorption ratio, polarization index in each time status).Press the upper or lower keys to circulate this test result.

Related tags： Machinery