Profile:
Leakage marking test is to apply a set voltage on the surface of a solid insulating material, between two electrodes, and drop a specified concentration of liquid at a certain height to evaluate the leakage marking resistance of the surface of a solid insulating material under electric field and contaminated media.
Features:
1, drop accurate: the use of precision plunger pump as the contaminated liquid supply system, the flow rate is uniform and stable;
2, test voltage stability: high sampling frequency, accurate measurement value, control system with automatic voltage regulation function, not affected by power grid voltage fluctuations, large equipment capacity, low voltage drop under test conditions;
3, safe and reliable: the system has an exhaust system, timely elimination of harmful gases generated by discharge, and has self-locking, door interlocking, zero limit start, upper limit protection, overcurrent, overvoltage and other protection functions.
Parameter:
1, electrode: thickness 0.5mm material 304 stainless material, upper and lower electrode distance: 50.0mm±0.1;
2, test voltage: 100V-6000V stepless adjustable;
3, voltage stability: ±1%;
4, voltage regulator: output: 0 ~ 250V can be adjusted, capacity 5KVA;
5, test transformer: capacity 5KVA, the highest output voltage AC6000V;
6, output voltage: AC;
7, high-precision regulator: output AC220V power 6000W, accuracy ±1%;
8, when the high voltage circuit current in the test reaches or exceeds 60mA for 2S, the relay action, cut off the current, the buzzer alarm indicates that the test is unqualified, then the alarm can be lifted by stopping the voltage;
9, marking judgment: according to the standard GB/T6553-2003/4.1.2, apply voltage (2.5kV, 3.5kV and 4.5kV) on the sample, and drop the contaminated liquid at a certain flow rate, the current below 60mA lasts 6H, but the flow is passed;
10, test time: 6 hours;
11, drop interval time: test time can be preset, 0 ~ 99.99S/M/H can be continuously adjustable;
12, drop device: high precision drop device, drop device height adjustable, precision peristaltic pump, adjustable flow range;
13, test solution: ammonium chloride, isoctylphenoxy polyethoxyethanol, non-ionic wetting agent with distilled water or deionized water mixture. The resistivity of the contaminated liquid at (23 sh)1℃ should be (3.95 sh 0.05)Ω·m.
14, filter paper size: according to the standard size requirements, filter paper thickness of 0.15 ~ 0.17mm.
