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GlowWireTest灼热丝测试

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产品名称: GlowWireTest灼热丝测试
产品型号: PTL-T03.14
产品展商: 德国PTL系列
产品文档: 无相关文档

简单介绍

GlowWireTest灼热丝测试to determine the fire resistance by the fire hazard test in accordance with IEC 60695 Part 2 Section1 / 1994-03


GlowWireTest灼热丝测试  的详细介绍
GlowWireTest灼热丝测试

G L O W - W I R E  T E S T
to determine the fire resistance by the fire hazard test
in accordance with IEC 60695 Part 2 Section1 / 1994-03
and further standards and regulations listed in the STANDARDS SCHEDULE T
03e
The test procedure is used to examine the fire resisting
properties of products if, during the application or in the
case of a fault, heated or glowing parts could be
considered as a short-time ignition source. Loose
connections or bad contacts cause punctually high
temperatures on electrical articles, their components
and their parts. Attention should also be paid to the fire
risk in connection with textile seat coverings, table-
cloths, or curtains, e.g. after coming into contact with a
lighted cigarette. For this reason, prototypes of all
articles which could be a source of danger if they con-
tact with ignition sources should be subjected to the
Glow-wire Test.
Test Apparatus
The ignition source is imitated by an electrically heated
wire loop against which the sample is pressed with a
constant force. A miniature jacket thermocouple serves
as a sensor for the loop temperature.
The sample has to be fastened to a carriage on which, by means of a tensioning cord, a weight
with a force of 1 N is effective in the direction of the wire loop. Scales enable the reading of the
flame height and the depth of penetration. Approx. 200 mm below the wire loop a board of pine
wood, covered with a layer of tissue paper, is mounted. This device enables to judge the danger
of a fire spreading through burning drops or glowing parts falling from the sample.
Test Method
The specimen and, if necessary, a base shall be attached relative to the wire loop in such a way
to represent the most unfavourable practical case. The scales of the measuring device shall be
adjusted and the penetration depth of the loop shall be limited by the adjustable stop. After
returning and covering the specimen the loop shall be heated up to the specified temperature.
When the loop has maintained the testing temperature for at least 60 seconds, the specimen
can be briskly led up to the loop. From the moment of contact, an operation time of exactly 30
seconds must be kept. Then the penetration depth is read and the specimen is slowly returned
to its starting position. During and after the operation the burning behaviour of the specimen and
the tissue paper on the wooden board has to be observed.

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