Voltage breakdown tester professional name for solid insulationelectrical strength testing machine or electric dielectric strength tester,it is the essential instrument laboratory.
Voltage breakdown tester for materials such as solid insulation:plastics, film, resin, mica, ceramic, glass, silica gel, insulating paint,in the medium of air or liquid, measuring power frequency (48~62Hz)or breakdown strength corresponding DC voltage and voltage withstand time, suitable for the continuous uniform boost or step way,an AC / DC voltage or until the breakdown on the sample, measuring the breakdown voltage, breakdown strength calculation sample;method to quickly boost, the voltage to rise to the specified value,keep the time of sample have no breakdown, set at specified values for the voltage values of samples. Now I will introduce to you the testmethod of voltage breakdown tester:
To test products to current electrode, voltage electrode pressure in the sample. Close the glass door, turn on the power switch, then refer to set the required parameters of relevant standards, such as nostandard requirements, according to the following steps:
The 1 breakdown voltage strength test
1) continuous boost: test voltage from zero start, according to boostspeed table 1 provides a continuous and uniform pressure, until the specimen is breakdown, breakdown voltage values read.
Table 1 continuous boost boost speed
The breakdown voltage kV Kv/s speed boost
2) step: according to continuous boost method to measure the samplebreakdown voltage value of 50% as the starting voltage, stay a minute later if the sample breakdown is not, according to the values specified in Table 2 voltage step, and in each voltage level for 1 minutes, until the sample breakdown. If the breakdown occurs in the boosting process, should be read before the voltage level value; if thebreakdown occurs in keeping voltage level unchanged, with thevoltage as the breakdown voltage.
Table 2 step method to boost the voltage value
The breakdown voltage of U (Kv) U < 55 < U < 2525 < U < 50, U ≥ 50
Each level of step-up voltage value kV 0.5125
2 high voltage test:
1) quickly voltage to the voltage by product standard value for 1points, to observe whether specimen breakdown. If no breakdown,then this voltage withstanding voltage.
The test results:
Voltage breakdown strength of E (kV/mm), the following formula:
Breakdown voltage of U---- kV, unit (kV);
The d----- sample thickness, mm (mm).
A median of 3 sample for the test results, keep one decimal place.
Seven, the test report
Unless otherwise specified, the report shall include the followingcontents:
1, the full name is the sample, sample and preparation method ofdescription
The median 2, electric strength (expressed as KV/MM) median orbreakdown voltage (KV)
3, each specimen thickness (see 5.4)
Around the coal quality and its performance for the 4 time, test
5, the electrode system
6, applied voltage and frequency
Each of the 7, the electrical strength value (expressed as KV/MM)each or the value of breakdown voltage (KV)
8, in the air or other gas test in the temperature, pressure and humidity, temperature of the surrounding property if the liquid test
Condition 9, before the test
10, breakdown type and position description
If only the most simple result report, you should report the contents of 6 and the minimum and maximum values