What are the usage characteristics of shielded flame retardant control flexible cables and their requirements?

I. How are the use characteristics of shielded flame retardant control flexible cable and its requirements? Shielded flame retardant control flexible cable is suitable for subway, high-rise buildings, shopping malls, theaters, power stations, chemical plants, city squares and other public utilities with AC rated voltage 450/750V and below, where the flame retardant characteristics of the cable are highly required. The halogen-free and low-smoke, low-halogen and low-smoke characteristics of the cable make it easy for people to evacuate when a fire occurs with slow spreading, low smoke concentration, high visibility, and small release of harmful gases. The small corrosiveness of the burning gas also avoids the damage to the instrument and equipment. The low-halogen and non-halogen characteristics make the cable material in the aging resistance and resistance to ultraviolet rays and other irradiation performance is greatly improved, thus prolonging the service life of the cable.　　Shielded flame retardant control flexible cable use characteristics: 1, the cable rated voltage UO / U: 450/750V, AC polyolefin UO / U for 0.6/1KV 2, the cable's long-term operating temperature is: -20 ° C -90 ° C, -40 ° C -105 ° C. 3, the recommended bending radius: unarmored cable should be not less than the cable's outside diameter of 6 times, with armored or copper tape shielding structure of the cable should be not less than 12 times the outer diameter of the cable.　　If the shielded flexible cable is used for shorter line lengths, the shield can be used single-ended, that is, at one end of the shielded cable will be directly grounded metal shield, the other end is not grounded or through the protection of grounding. The induced voltage corresponding to the length of the cable cannot exceed the safety voltage when both ends of the metal shield of the shielded cable are connected to ground. Because, shielded flame retardant control flexible cable metal shielding layer will not produce induced voltage, but the metal shielding layer by the interference flux will produce shielding loop current through, if the location A and location B of the potential is not equal, will form a large potential loop current, due to the presence of static induced voltage affects the stability of the entire circuit signals, and even produce antenna effect will be more than worth the loss.

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