Depending on the wire and cable wire and cable fire testing machine is divided into a variety of refractory testing machine testing machine, including the common wire and cable, medium voltage refractory refractory testing machine testing machine and bs refractory testing machine and so on wire and cable testing equipment
The refractory test includes the following parts:
1, power cable support system:
Cable through the clamp horizontal clamped on both ends of the cable sheath. The middle part of the cable is made up of two metal rings (300 mm) distance is a fixed, metal ring with other metal parts of the ground. For no armored cable diameter less than 10 mm, or some other apparent displacement of cable during the test, for the three metal rings, each fixed in the original metal ring at a distance of 150 mm.
2, continuous detection device: when the test let electricity pass through all of the cable core, a three-phase y-connected single-phase transformer transformer or three (or a single-phase transformer, if the test for single core cable), and have enough ability to keep under the test voltage to achieve maximum allowable leakage current 3 a. Each conductor at the other end of the cable connection, A lamp and load under the cable rated voltage close to 0.25 A current 3, heat is A 610 mm long may be mandatory supply alkanes, intensive tube type gas burner flame.
4, temperature measurement: 2 mm diameter armored thermometer near the air inlet, parallel to the burner above 75 mm.
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