IEC 60695-2-10:2000 pdf free download – Essais relatifs aux risques du feu
1 Scope
This part of lEC 60695 specifies the glow-wire apparatus and common test procedure tosimulate the effect of thermal stresses which may be produced by heat sources such asglowing elements or overloaded resistors, for short periods, in order to assess the fire hazardby a simulation technique.
The test described in this standard is applicable to electrotechnical equipment，itssubassemblies and components，and may also be applied to solid electrical insulatingmaterials or other solid combustible materials.
One of the responsibilities of a technical committee is, wherever applicable, to make use ofbasic safety publications in the preparation of its publications.
2Normative references
The following normative documents contain provisions which，through reference in this text,constitute provisions of this part of lEC 60695.For dated references,subsequent amendmentsto, or revisions of，any of these publications do not apply. However，parties to agreementsbased on this part of iEC 60695 are encouraged to investigate the possibility of applying themost recent editions of the normative documents indicated below.For undated references, thelatest edition of the normative document referred to applies. Members of lEC and lSO maintainregisters of currently valid International Standards.
4 Outline of the test apparatus and common test procedure
This part of lEC 60695 specifies the glow-wire apparatus and common test procedure as a firetest using a non-flame ignition source.
The glow-wire is a specified loop of resistance wire,which is electrically heated to a specifiedtemperature.The tip of the glow-wire is brought into contact with a test specimen for a specificperiod of time and a range of observations and measurements made，dependant upon theparticular test procedure.
A detailed description of each test procedure is given in lEC 60695-2-11,IEC 60695-2-12 andIEC 60695-2-13.
5.1Glow-wire
The glow-wire is made from nickel/chromium (80/20) wire， with an overall nominal diameter of4 mm.The wire is formed into a loop as detailed in figure 1.
The glow-wire is heated by a simple electric circuit as shown in figure 2. There shall be nofeedback mechanism or circuit to maintain the temperature.
Due to the high currents involved, it is essential that the electrical connections for the glow-wireare capable of carrying the current without affecting the performance or long-term stability ofthe circuit.
NOTE1 The typical current necessary for heating the tip to a temperature of 960 C is between 120 A and 150 A.The test apparatus shall be so designed that the glow-wire is kept in a horizontal plane and thatit applies a force of 1,0 N±0,2 N to the test specimen during the application of the glow-wire.The force shall be maintained at this value when the glow-wire or the test specimen is movedhorizontally one towards the other.The penetration of the tip of the glow-wire into and throughthe test specimen shall be limited to 7 mm ±0,5 mm.