Burning Testing Apparatus for Circuit Integrity of Wire or Optical Fibre Cable

1. Scope of application:

It is suitable for testing wire or optical cable maintains the circuit integrity during the fire supply under the flame of at least 750℃, and whether the wire or optical cable maintains the circuit integrity under the condition of fire supply and impact at least 830℃.

2. Compliant standards:

2.1 Comply with the standard requirements of IEC60331-11:1999 "Test for electric cables under fire conditions - Circuit integrity - Part 11: Apparatus - Fire alone at a flame temperature of at least 750°C";

2.2 Comply with the requirements of IEC60331-12:2002 "Test for electric cables under fire conditions - Circuit integrity - Part 12: Apparatus - Fire with shock at a temperature of at least 830℃";

2.3 In line with IEC60331-21:1999 “Test for electric cables under fire conditions - Circuit integrity - Part 21: Procedures and requirements - Cables of rated voltage up to and including 0.6/1.0kv”;

2.4 In accordance with IEC60331-23:1999 “Test for electric cables under fire conditions - Circuit integrity - Part 23: Procedures and requirements - Electric data cables”;

2.5 Comply with the requirements of IEC60331-25:1999”Test for electric cables under fire conditions - Circuit integrity - Part 25: Procedures and requirements - Optical fibre cables”;

2.6 In line with IEC60331-31:2002“Test for electric cables under fire conditions - Circuit integrity - Part 31: Procedures and requirements for fire with shock - Cables of rated voltages up to and including 0.6/1.0kv ”;

3.1. GB/T19216.11-2003 standard test support device: the sample holder has a total of 3 support rings, the inner diameter of the metal ring is about 150 mm, and it is made of round steel rods with a diameter of (10±2) mm. During the test, the sample is placed on the support ring, one end of the sample is fixedly clamped to prevent movement, and the other end is supported to allow the sample to move longitudinally due to thermal expansion. Comply with GB/T19216.11-2003, GB/T19216.21-2003, GB/T19216.23-2003, GB/T19216.25-2003 standards, see Image 2 below

3.2. GB/T19216.12-2008 test ladder frame: composed of steel frame, suitable for the test of cables of different sizes, the two central vertical members on the test ladder frame can be adjusted. The test ladder is 1200mm long and 600mm high, and the total mass of the test ladder is (18 ± 1) kg. Adapt to GB/T19216.12-2008, GB/T19216.31-2008 standards;

3.3.GB/T19216.12 Impact generating device: The impact generating device consists of a low carbon steel round bar with a diameter of (25±0.1MM) and a length of (600±5MM), which is wound around a The axis of the test ladder is free to rotate, and it is located in the same horizontal plane (200±5MM) from the upper edge of the test ladder. This axis divides the round bar into two unequal lengths, namely (400±5MM) and approximately 200MM, respectively, and the longer part strikes the test ladder frame. The round bar is dropped by its own weight from an angle of 60°C with the horizontal plane, and is struck once at the midpoint of the test ladder every 30 s ± 2 s. Comply with GB/T19216.12-2008, GB/T19216.31-2008 standards;