Home ProductsFlammability Test Chamber

UL 746A UL 498 Polymeric Materials Flammability Test Chamber High Current Arc Ignition Test

Certification
China Sinuo Testing Equipment Co. , Limited certification
China Sinuo Testing Equipment Co. , Limited certification
Customer Reviews
Perfect on-site installation service, excellent training and technology support. Absolutely helps us a lot.

—— Aryan Das

Thanks. Your company is very professional, I am sure we will have good cooperation in the future.

—— Fernando Fuentealba

It's a great purchase, good products received with good packing, will back to you for next needs.

—— Sarah Rashad

I'm Online Chat Now

UL 746A UL 498 Polymeric Materials Flammability Test Chamber High Current Arc Ignition Test

large.img.alt
small.img.alt small.img.alt small.img.alt small.img.alt

Large Image :  UL 746A UL 498 Polymeric Materials Flammability Test Chamber High Current Arc Ignition Test

Product Details:
Place of Origin: China
Brand Name: Sinuo
Certification: Calibration Certificate (Cost Additional)
Model Number: SN779
Payment & Shipping Terms:
Minimum Order Quantity: 1
Price: Negotiable
Packaging Details: Plywood
Delivery Time: 30 Days
Payment Terms: T/T, L/C, Western Union, MoneyGram
Supply Ability: 10 Sets Per Month
Detailed Product Description
Electrodes: Copper And Stainless Steel Arc Current: 33A
Arc Voltage: 220V~240V Electrode Running Speed: 254mm/s±25mm/s
Arc Strike Frequency: 40times/min Power Factor: COSφ0.5
High Light:

flame test chamber

,

flammability test apparatus

UL 746A UL 498 High-Current Arc Ignition Performance Solid Insulating Materials Flammability Testing Equipment

 

Overview:

 

Hot wire ignition test apparatus conforms to UL 746A clause 33, UL746C clause 49, UL 498 clause 114, IEC 60950-1, BS EN 60950-1, BS 7002, etc..

 

This flammability test chamber is useful in defferentiating among solid insulating materials with regard to resistance to ignition from arcing electrical sources. It is suitable for arcing resistance test of the materials of electric and electronic products, household appliances and etc.

 

Working Principle:

 

The working principle is to simulate the electric leakage on the insulator which may be caused among different polar of live parts or between live parts and grounded (earthed) metal parts. It is used to measure and assess the arc resistance performance of insulator under the prescribed voltage.

 

High current arc ignition tester adopts dual electrodes. With specific current (33A) and power factor (COSφ0.5), according to a certain arc strike speed (254mm/s) and repetition frequency (40 times/min), repeatedly arc strike to 200 times on the surface of specimen. The high current arc ignition performance (HAI) can be assessed according to whether the sample can be ignited.

 

Technical Parameters:

 

Electrodes

Ф3.5mm 30° Copper(Static) electrode

Ф3.0mm 60° Stainless Steel(Dynamic) electrode

Arc strike current 33A
Arc strike voltage 220-240V
Electrode running speed 254mm/s±25mm/s
Arc strike frequency 40times/min
Power factor COSφ0.5
Test times 0-9999 times
Power source 220VAC, 60Hz high capacity source
 

Test Procedure:
 

The test is to be conducted on five specimens. Each specimen, in turn, is to be clamped flat so that the longitudinal axis of the sample is normal to the common vertical plane of the electrodes. The fixed electrode is to be secured in place such that the chisel edge is in firm contact with the top surface of the specimen with sufficient force to ensure the electrode remains stationary during the test, but does not cause significant physical damage to the specimen. The point of contact of the fixed electrode is not to be less than 4 mm from any edge of the sample. The moveable electrode is to be adjusted such that it contacts the fixed electrode between 0.75 to 1.00mm above the surface of the specimen. The movable electrode is them to be scured in position. The equipment is to be adjusted to provide a dwell time of 100±20ms before electrode withdrawal breaks the circuit and the timing of the arcs is to be adjusted to a rate of 40 complete arcs per minute. The circuit is to be energized and the cyclic arcing started. The test is to be continued until ignition of the sample occurs, a hole is burned through the sample, or until a total of 150 cycles has elapsed.

 

If ignition or a hole through any specimen ccours, an optional above surface test may be conducted. This optional test is conducted on an additional set of three samples tested with the electrodes making contact a maximum of 1.6mm above the surface of the specimen. Should ignition or a hole occur within 150 cycles, an additional set of three samples may optionally be tested with the electrodes making contact a maximum of 3.2mm above the surface of the speciment. A hole caused by the fixed electrode impinging on the sample or initiating a tear is to be excluded from the test results. Or holes caused by combusting of the sample, as a result of arcing, are to be recorded and inclided in the report.

 

The following is to be recorded as applicable:

a) The number of arcs to cause ignition.

b) The number of arcs to cause a hole through the sample

c) The maximum number of cycles, 150.

d) Observations regarding meltning, charring, or the like.

 

UL 746A UL 498 Polymeric Materials Flammability Test Chamber High Current Arc Ignition Test 0
 
UL 746A UL 498 Polymeric Materials Flammability Test Chamber High Current Arc Ignition Test 1
 
 
 

Contact Details
Sinuo Testing Equipment Co. , Limited

Contact Person: Manager

Tel: +8613527656435

Send your inquiry directly to us (0 / 3000)