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Click to see more exciting information 1 Introduction Cable sandwich is power plant and substation cable one of the most intensive in case of fire, the consequences are unimaginable. Therefore, the cable sandwich is one of the major cable fire. In SDJ278-90 "Water Resources and Hydropower Engineering Design Standards" Article 7.0.1 states: E power cable cable cable layers from top to bottom, should be installed in fire-resistant partitions. Article 7.0.7 provides that: large cable room should be installed water spray fixed fire extinguishing system. In GB50229-96 "power plant and substation fire protection design," Article 9.3.3 states: substation cable dissection should set the suspension gas automatic fire extinguishing equipment. 2 Types of Design and Construction Now, I laminated cable fire district cable design and construction of all kinds, summed up in the following three types. 2.1 The first type Addition to cable holes through the floor and walls were Fire blocking, the dissection of the cable all the brush fire Paint . 110kV substation as Sandy Bay Beihai, Guilin Pheasant Hill 220kV substation ... ... and so on fall into this category. This type take into account both the level of the cable along the direction of fire retardant problem, but also taking into account the vertical flame arrester cable layer separation problem. Its characteristics are: low cost and large but the construction work, demanding the construction process. The biggest drawback is fire-resistant properties of fire material is divided into three categories: non-flammable, flame resistance, extension flammable. I generally use a two zone fire retardant coating, the flame time 10min, are fire-resistant extension of flammable worst performance in this category; due to a shorter life fire retardant coating, only 2 to 3 years, therefore, each repeat 2 to 3 years and also a fire retardant paint brush. The second type 2.2 Addition to cable holes through the floor and walls were Fire blocking, the dissection of the cable in the horizontal direction on both ends of each line segment has been to install a 2m long tank fire box, fire boxes trough blocked both ends of flexible refractory tight sealing material, as the Fire section, to implement the cable along the horizontal direction of the Fire retardant. Since the disk cabinet to the floor down through the vertical lines through brush fire retardant coating to increase the length of Fire section, reducing the time the fire broke out on the main control room cabinet cable tray and electrical heat radiation, such as Liuzhou 220kV change on mountain electricity ... ... and so on fall into this category. This type of cable only considered the level of fire retardant to the problem, its features are: construction cost than the first type of high, but the construction workload of the small, not very high demands on the construction technology, fire protection and long life groove box (large in 10 years). The biggest drawback is not considered vertical cable Sandwich Fire separation problem. A third type of 2.3 Addition to cable holes through the floor and walls were Fire blocking, the sandwich in the cable bracket on the fire resistance of each layer of cable tray are loaded. At the same time, each layer of each cable in the horizontal direction, has been installed at both ends of a line 2m long fire trough boxes (box ends of tank fire with fire-resistant flexible sealing tight closure) to increase the level of cable to Fire retardant effect . Since the disk cabinet to the floor down through the vertical lines through brush fire retardant coating to enhance the Fire Department section of the length of the main control room when the fire broke out less cabinet cable tray and electrical heat radiation, such as Etan Hydropower Plant ... ... and so on fall into this category. This type of comprehensive consideration of the cable along the horizontal direction of the problem and the cable fire retardant layer vertically separated Fire issue. Its characteristics are: a higher project cost and construction of a larger workload, long life (more than 10 years). 3 Design and Construction Under the current fire code and specifications for the cable and the Guangxi regional cable design and construction of mezzanine cable fire and summarize the author of several types of cable fire a few years to participate in the design, production and on-site fire protection materials, actual construction experience, make the following cable Laminated cable design and construction of fire programs. The e-commerce company in China offers quality products such as Pvc Butterfly Valve , Pneumatic Butterfly Valve, and more. For more , please visit Wafer Type Butterfly Valve today!
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