Semi-insulating tube shield kv bus technology manufacturers an ampacity insulated copper busbar: a single bus carrying capacity can be up to 6000A; rectangular copper bars: single ampacity low, ≤1500A. Two insulated copper busbar mechanical strength: the strength of the high maximum span can reach 10 meters, that is a fixed point of maximum 10 meters; rectangular copper: low mechanical strength, about 1.5 meters must be set to a fixed support at intervals of three meters a column . 3 skin effect insulated copper busbars: tubular conductor, skin effect coefficient low, small voltage loss is equal section rectangular bus 1/4; rectangular copper bars: the entity conducting material, skin effect coefficient, a large voltage loss , a plurality of parallel operation imbalances insulated copper bus bar insulation level 4: Commonly known as tubular cable or pipe-type bus to 10kV fully insulated as an example: (1) 1min power frequency withstand voltage level: 42kV (2) positive and negative polarity of each 10 impulse withstand voltage levels: 105kV (3) partial discharge level is not greater than: 13KV≤20PC (4) 15min negative dc test voltage: 52kV (5) 4h frequency test voltage: 35kV rectangular copper: generally rely on insulators 5 safety insulating protective insulated copper busbar: fully insulated housing ground, the outer surface potential is zero, the human body can touch and touch, high safety performance. Rectangular copper bar: You can not touch, must be separated by a safe distance, because of the fixed points, hidden faults big, annual maintenance outage every 6 Maintenance insulated copper bus: maintenance-free rectangular copper: maintenance workload 7 Scope insulated copper Tube Bus: indoor and outdoor. In particular bend, climb, wall, a variety of complex situations rectangular copper cable layer: indoor and outdoor, inconvenient life of insulated copper busbar bending 8: stable primary insulation material performance, service life more than 30 years of rectangular copper: less than 20 years of economic cost analysis (10kV / 4000A 50 米 × 3 phase, for example) 1, the selection rectangle selection cost copper copper Specification: 10 × 125 × 6000 parallel copper economic current density: Take 0.9A / mm each copper ampacity: I = 10 × 125 × 0.9 = 1125 (A) the number of copper per phase required: N = 4000/1125 = 3.56 (root) to take four copper total weight: G = 50 m × 4 根 × 3-phase × 11.25kg / m = 6750 (kg) copper Price by: 50 yuan / kg total price of copper: ￥ = 6750 × 50 = 33.75 (million) 2, Li concrete pillars supporting point cost fee: 50 m ÷ 3 m / root × 5000 yuan / root = 8.5 (million) insulator fee: 50 m ÷ 1.5 m / branch × 500 yuan / piece = 1.7 (million) with a fixed payment fee: 50 m ÷ 1.5 m / set × 500 yuan / set = 1.7 (million) insulation protection fee: 50 m × 3-phase / m × 200 yuan / m = 3 (million) Total cost: 8.5 + 1.7 + 1.7 + 3 = 14.9 (million) 3 , installation and construction costs: Estimated construction fees: 200,000 yuan with copper comprehensive cost: 33.75 + 14.9 + 20 = 68.65 (million) 2, a comprehensive selection of insulated copper busbar cost: Scenario I: selection of fully insulated copper bus FPTM -10/4000: fully insulated copper bus fee: 50 m × 3-phase × 5000 yuan / m = 75 (million) vertical concrete pillars Cost: 6 × 5000 yuan / root = 3 (million) Total costs: 75+ 3 = 78 (million) Programme II: selection of semi-insulating copper busbar FLMFZ (FB) -10/4000 semi-insulating copper bus costs 50 m × 3-phase × 4000 m / dollar = 60 (million) vertical concrete pillars Cost: 6 Root × 5000 yuan / root = 3 (million) Total Cost: 60 + 3 = 63 (million) insulation shield tube type bus superiority of an insulating shield tubular bus has the following advantages a) ampacity for bassoon-shaped bus hollow conductor, the conductor surface is circular surface, surface area, the conductor surface current density distribution, the highest rated current up to 12000A. b) electrical insulation properties and strong tubular busbars way sealed shield insulation, shell ground bit is zero, the bus surface electric field distribution, strong electrical insulation properties, can be directly through the cable trench and cable dissection. c) the skin effect is low, power loss is small tubular busbars low coefficient of skin effect, kf ≦ 1, AC resistance is small, and therefore little power loss bus, greatly enhance the conductivity of the bus. d) cooling conditions, low temperature rise as a hollow tubular bus conductors, bus inner diameter of the duct can be naturally formed hot air convection cooling conditions are better compared to the conventional rectangular bus. e) the allowable stress [σ] large span, high mechanical strength we "conductive material Electrical Manual" can be learned, stress brass is 294MPa, a tensile strength of 320MPa, a full rectangular copper busbar 4 times, so that the cross-linked shield insulated copper busbars can withstand short-circuit power is far greater than the rectangular bus. Brass busbar largest span can reach 9 m, if the double steel structure supporting the adoption of its largest span can reach 14 meters, with direct access to the high-pressure chamber and switchgear or reactor connected voltage 400v, 10kv, 35kv, 110kv, 220kv Current 1000A, 1600A, 2000A, 2500A, 3150A, 4000A, 5000A, 6300A, 8000A factory direct selling price, you can build all kinds of models, cheap, large more favorable. Sincerely look forward to working with you! Bai Zibo Electric Co., Ltd. | half shield kv insulated pipes bus technology manufacturers