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CMC fireproof busway detailed information |
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(1) The mica tape wrapped around the conductor copper bars of the busway complies with JB/T5019~20-85 "Electrical Insulation Mica Products" and JB/T6488-1~3-92 "Mica Tape" standards. Under normal conditions, this mica tape has good flexibility, high heat resistance, and good dielectric and mechanical properties: bending strength ≥180MPa, dielectric strength ≥35kV/mm. When the temperature reaches 600°C, the mica tape still maintains high insulation performance.
(2) Depending on the fire resistance rating of the fire-resistant busway, different measures are taken for its thermal insulation layer. If the busway needs to be energized for long periods, the insulation layer generally uses air insulation directly to avoid affecting heat dissipation during operation. When the busway is not normally energized and is only used as an emergency power source, its heat resistance limit is higher, and the insulation layer needs to be filled with silicon cotton. The silicon cotton material used in this fire-resistant busway complies with GB3003-82 "Ordinary Aluminum Silicate Refractory Fiber Felt" standard, with an AL2O3+SiO2 content of 96%, a continuous use temperature of 1050°C, and a maximum use temperature of 1250°C.
(3) The busway shell is coated with fire-retardant paint. Within 3 to 5 minutes of a fire, the paint begins to foam and expand, forming a thermal insulation layer that rapidly increases thermal conductivity, effectively reducing heat transfer. The fire-retardant paint used in this fire-resistant busway meets all performance indicators of the national GB14907-94 standard.
(4) To meet fire resistance requirements, the phase separators and joint separators are made of high-temperature ceramic material with an Al2O3 content of over 95%. Under normal conditions, its dielectric and mechanical properties are as follows: dielectric strength ≥13kV/mm, volume resistivity >20MΩ.cm, bending strength ≥250MPa.
The ceramic's temperature resistance is particularly outstanding. At a temperature of 900°C, the measured insulation resistance is >10MΩ. Due to the good stability of ceramics, there is no aging problem of insulating materials, effectively extending the service life of the busway.
3) Environmentally friendly product
In case of fire, the fireproof busway releases no toxic gases and does not cause secondary combustion, making it a new generation of environmentally friendly electrical products.
4) Flexible wiring
The fireproof busway has flexible plug-in interface settings, making it convenient to draw branch currents. Each plug-in interface can accommodate plug-in boxes of different capacities. The plug-in box's plug guard plates are also made of high-temperature ceramic material, ensuring that power can be drawn smoothly even in case of fire.
2. Main technical parameters
1) All performance of the RSMX-NH series busway complies with IEC439-1~2, GB7251.1~2-1997, JISC8364, and GB9978 standards.
2) The busway can withstand a 2500V power frequency withstand voltage for 1 minute without breakdown or flashover.
3) The busway uses high-strength ceramics as phase separation material, enabling it to withstand strong electrodynamic and thermal stresses. The busway is a fully enclosed structure with a protection rating of up to IP54.
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CMC fireproof busway detailed information |
