Introduction:
Tracking test equipment is designed and manufactured in strict conformity with GB4207 and IEC60112 standards. Lighting, low voltage electrical devices, home appliances, electrical machineries, motors, power tools, electronic devices, and electrical instruments are all suited for it. Additionally, it applies to the industries of insulation, plastic, electrical connectors, and accessories. Method for calculating the proof and the solid insulating materials' comparative tracking indices. It has features that are clear, precise, trustworthy, and useful.
Standard:
GB/T4207
GB4706.1
ASTM D 3638-92
IEC60112
Basic test procedure
1. General
Where the material is substantially anisotropic, tests shall be made in the direction of the features and orthogonal to them. Results from the direction giving the lower values shall be used, unless otherwise specified. Test shall be made at an ambient temperature of (23土5) °C. Tests shall be made on uncontaminated test specimens, unless otherwise specified . The result of a test where a hole is formed is considered to be valid, irrespective of the test specimen thickness, but the formation of the hole shall be reported together with the depth of the hole (the thickness of the test specimen or stack).
2. Preparation
After each test, clean the electrodes with an appropriate solvent and then rinse them with de-ionized water. If necessary, restore their shape and give a final rinse before the next test. Immediately before the test ensure， if necessary by cooling the electrodes， that their temperature is sufficiently low so that they have no adverse effect on the specimen properties. Ensure freedom from visual contamination and ensure that the solution to be used conforms to the conductivity requirements either by regular testing, or by measurement immediately before the test.
NOTE 1 Residues on the dropping device from an earlier test will probably contaminate the solution and evaporation of the solution will increase its concentration - both of which may result in lower than true values. In such cases it may be advisable to clean the outside of the dropping device mechanically and/or with a solvent and the inside by flushing through with conforming solution before each test. Flushing through some 10 to 20 drops depending upon the delay between tests will normally remove any non-conforming liquid.In case of dispute, the cleaning procedures used for the electrodes and dropper tube shall be agreed between purchaser and supplier.
3. Test procedure
Start the dropping system so that drops fall on to the test surface and continue the test until one of the following occurs:
a) the over-current device operates;
b) a persistent flame occurs;
c) at least 25 s have elapsed after the ftieth (hundredth) drop has fallen without a) or b) occuring.
NOTE .
If there is no requirement for the determination of erosion, the 100 drop tests may be made ahead of any 50 drop tests. After completion of the test, vent the chamber of noxious fumes and remove the test specimen.
UL746A
Feature:
1. A corrosion-resistant paint coating for the combustion chamber. The Tracking Test Apparatus measures 1200mm X 600mm X 1200mm.
2. The tracking test apparatus's sample holders are all constructed of stainless steel.
3. The instrument is made up of a voltmeter, an ammeter, time overcurrent relays, power supply, a circuit control system, pushbutton switches, lights, and other parts;
4. An automatic drip device that drops a volume measuring tool, a drip nozzle, a counting device that counts drips, and a drip control device;
5. The drip nozzle device has an adjustable height range of 30–40mm; make sure the drip is positioned between the two electrodes;
6. The electrode means includes a platinum electrode, electrode fixtures, a 4mm gauge, etc., and an adjustable, removably attached electrode;
7. 99.9% pure platinum electrodes with dimensions of 5mm wide by 2mm thick and a tip angle of 30° to 60°; 8. electrode samples with adjustable pressure and adjustable range (1.00N to 0.001N); electrode distances of 4.0mm by 0.01mm and 60° by 5°;
9. Regarding the sample phase;
10. Thickness of the glass: 4 mm.
11. Each bottle of the electrolyte contains sodium chloride and the reagent alkyl naphthalene sulfonic acid.
Safety control system:
1. Adjustable test voltage range of 0 to 1000V. The maximum display inaccuracy for voltmeters is 1%.
2. Current in a short-circuit: (1 Guests 0. 1) A. The voltage drop is less than 10%.
3. When the test current is greater than 0.5A for a period of more than two seconds, the system turns off the equipment.
4. The security door control system's test system is inoperative; the door opens.
5. Each pair's rectangular, 5 mm by 2 mm platinum electrode and brass electrode fulfill the standards of IEC60112 Figure B.1.
6. The electrode: A 60° disability 5° angle is established between the electrodes, with a pitch of (4 Soil 0.1mm).
7. The electrode: a sample pressure of 1.0 N with a 0.05 N disability.
8. Drip system: automated counting, digital display (may be changed), 50 drops of time: (24.5 Soil 2) min. (30 5) seconds (on time 29.8S + open drip drip length 0.2S).
9. Drip systems: a drop of fluid, measured from the tip of the needle to the sample surface, is 35mm high and 5mm wide (attach a gauge for measuring your reference).
10. Drip irrigation: drip Weight: 50 drops: 0 997g to 1 147g; 20 drops: 0.380g to 0.489g.
11. A PLC with a touch screen control system has been used to make tests smarter and more practical.
12. The test results are automatically recorded, stored, and made available for free.
Welcome to contact us:
Contact Person: Kiana Feng
Whatsapp/Wechat: +86 15922982738
Mobile: +86 15922982738
Fax: +86-23-62940030
Email: gold20@hy-industry.com