A detailed description, performance
All insulation shielding copper busbar, essence is use copper as a conductor, an external insulation bus products. In the foreign countries known as the "tube shaped cable". The insulation copper tube bus with high current, the high carrying capacity can reach 12000A, high mechanical strength, good insulation, wide application range and other characteristics, so it is more and more recognized and accepted. In foreign countries, this kind of product has decades of history and experience, while the domestic to enter this field for a short time, and the capability of R & D, insulating material limitations and other reasons, the current production, used mainly in the 0.4KV -- 35KV voltage grade products.
The implementation of standards, standard
GB 156 -- 1993 standard voltage
GB 311.1 insulation coordination -- 1997 of high voltage transmission and transformation equipment
GB/T 762 -- 1996 standard current
The 763 -- 1990 GB/T high voltage electrical work in long time heating
GB/T 2706 -- 1989 AC high voltage electrical test method of dynamic thermal stability
GB 4208 -- 1993 shell protection grade (IP code)
GB/T 5231 -- 1985 processing of copper, chemical composition and the shape of the product
GB /T 11021 -- 1989 electrical insulation thermal evaluation and classification
GB /T 16927.1 -- 1997 high voltage test techniques - Part 1: General test requirements
GB/T 16927.2 -- 1997 high voltage test techniques of second parts: measuring system
GB 50150 -- 1991 electric equipment installation standard for hand over test of electric equipment engineering
The 50260 -- 1996 GB code of seismic design of electric power facilities
Environment conditions
The highest temperature of the surrounding air temperature: 45 ℃ low temperature: -40 ℃
The maximum daily temperature: 30 ℃
The intensity of sunshine (wind speed 0.5m/s): 0.1W/cm2
Altitude: ≤ 1000m (elevation above 1000m, need to confirm the manufacturer)
The maximum wind speed: 35m/s
The environmental relative humidity (at 25 ℃): daily average value: with an average value of 95% months: 90%
Rainfall: annual precipitation is 3000mm, the maximum daily precipitation 360mm
Earthquake intensity: grade VII: 0.25g, horizontal acceleration, vertical acceleration: 0.125g, frequency of vibration frequency: 20Hz, for the tolerance time
The sine wave 3 Zhou Bo safety coefficient is greater than 1.67 of the horizontal acceleration design and test according to the dynamic conditions, products guarantee normal operation in the earthquake and short circuit under the simultaneous action.
Contamination grades: grade IV (31mm/kv, calculated according to the highest voltage)
Thunderstorm days: 90 days / year
Product installation location: indoor and outdoor

Two, advantage,
With the rapid development of Chinese economy, the social demand for electric power is increasing day by day. At present, 110KV and 220KV substation low pressure side are used 10KV, 35KV voltage level, with the increase of main transformer capacity, the rated current of the transformer low-voltage line side is also increasing. The conventional rectangular bus more difficult to satisfy the bus heating and short circuit force are required in the technology and structure, increase caused by the additional loss, skin effect coefficient, and decrease the interception ability, the uneven distribution of current. Especially the single main transformer capacity of 180MVA and above, the main variable 10KV outlet side not only have problems, electric power busbar bridge itself problem of heat, and the nearby bus bar bridge pillar insulator, steel frame and busbar bridge concrete column, foundation reinforcement in the induction in the electromagnetic eddy current induced heating problem.
Insulated copper busbar as rectangular bus alternatives. It has the following characteristics:
1 load flow
The insulating body is a hollow copper pipe bus, large surface area, relative to the conventional rectangular bus conductor surface, uniform distribution of the current density, the maximum rated current up to 12000A.
2 good insulation performance
Insulated copper busbar sealed insulation shielding, ground zero potential, generatrix surface uniform electric field distribution, electrical insulation. Can be directly through the channel of cable and cable interlayer.
3 high mechanical strength
Insulation copper tube bus body allows the stress was 4 times of rectangular bus, the short-circuit current can withstand large, high mechanical strength, make the bus bar support span up to 8 meters.
4 good heat dissipation, Wen Shengdi
Insulated copper busbar busbar is a hollow conductor, two ends of a ventilation hole, diameter duct can naturally form the hot air convection, good heat dissipation conditions, compared with the conventional bus.
5 low loss
Insulated copper busbar shape determines the surface skin effect coefficient is low, Kf ≤ 1, AC resistance is small, so the bus power loss. Crosslinking shield dielectric loss of insulating layer of the bus is less than 0.01%.
6 high coefficient of heat insulating materials
XLPE insulation shielding the main insulation material of tubular busbar PTFE, has excellent electrical properties and chemical stability, can work normally at -200 ℃ ~ +200 ℃, small dielectric loss, flame retardant, resistance to aging, cooperate with other insulating materials, the service life of the product is more than 40 years.
7 anti electric shock ability
Dynamic stability test results of surface, voltage 10KV, rated current 4000A copper tube base, can bear 63KA (4S) short circuit current impact. It can directly to the bus is fixed on the steel frame and concrete support, cancel the insulator bushing and pillar, has strong ability of anti vibration.
8 no environmental interference, high reliability
Insulated copper busbar each phase insulated shielding is closed, no internal condensation, and eliminate the external moisture, dust and foreign objects caused by earthing and short fault, running with high reliability.
Simplified busbar framework, clear arrangement, convenient installation, low maintenance workload.
A successful installation products, life-long maintenance free.
Three, Guangzhou city core electrical science and technology limited company -- the special advantages of insulated copper tubular busbar
1 specifications, reasonable.
According to the insulation level flow, load bus customer needs, choose the most reasonable size specifications for customer. In order to fully meet the technical requirements, but also do not understand the technical customer cost savings. For example: 12KV/3150A, I am using copper tube with 80*8mm as a current carrying conductor. The current area of 1810 mm2, wall thickness of 8mm, the tube core diameter with 64mm, need to be able to fully satisfy the load flow, and give full play to the characteristics of the insulation copper tube bus high mechanical strength, good heat dissipation, Wen Shengdi.
2 raw material specification
One, carrying the copper content ≥ 99.9% conductor copper. And in the design, the production process, according to the site conditions, the need to bend the place, the half hard copper pipe toughness better. But the need to span the place, the use of hard state copper better mechanical strength. This is our company based on years of research and development, production experience, a unique set of material using the method.
Teflon F4 two, the main insulation material is the Japanese big gold raw materials on the current international advanced. The company produces a full insulation shielding copper busbar, insulation performance is more superior in.

3 patents
A tubular busbar, a middle connecting device (patent pending)
The pipe connection intermediate bus bridge, the embedded conductive tube, unilateral or bilateral openings in the tube type busbar bridge end to be connected with circumference, bolt.
The tube type busbar intermediate this company uses the connection device, is mainly composed of a circle surrounding a specific length of the unilateral opening piece conductive pipe and a circle around the unilateral opening piece stainless steel pipe.
The installation will require a tubular busbar bridge were evenly into the open at both ends of a conducting tube, then the opening piece stainless steel tube has been inserted sheathed tubular busbar bridge opening piece conductive tube. And then use the fixture uniform force, will be opening conductive pipe and stainless steel pipe clamp, pipe clamp type bus bar bridge conductive tube and the inside until all unilateral open close close. And then welding the outside all unilateral opening piece opening gap welding stainless steel tube. This method is mainly based on the physical principle of uniform stress hoop. In order to solve the problem of tube type busbar bridge during operation due to the intermediate connecting part are not closely connected, the conductive contact surface is small. Due to the heating problem. Convenient installation process, reduce installation time, timely to meet the electrical power system plan to send.
Three, an adjustable and movable hardware device (patent pending)
The existing pipe type bus manufacturers use the following hardware connected with a bracket for fixing bolt connection. The activity of small gap, not the earthquake, operability is small, not easy to spot installation. And you may not be able to effectively prevent the tube type busbar bridge expansion and contraction caused by extrusion.
Adjustable and movable hardware device adopted by the company, a sliding groove aluminum casting fittings base fittings and with sliding groove. Mainly to solve the installation process debugging difficulties, and enhance the fitting position adjustability, pipe type bus bar bridge aseismic capability, and effectively prevent the tube type busbar bridge expansion and contraction caused by extrusion.