1000A fully insulated epoxy resin waterproof pouring type bus duct

1000A fully insulated epoxy resin waterproof pouring type bus ductThe so-called ordinary bus duct is a transmission and distribution system with electrical continuity formed by wrapping several conductors in a metal shell through a reasonable and safe structure.

Ordinary bus ducts are generally divided into two types: dense insulation type and air insulation type. Air insulated structure is simple and capable of carrying large currents; The dense insulation structure is compact and has good heat dissipation capability.

They all have the characteristics of strong overload capacity, convenient tapping, and small space occupation. Cables are divided into single core cables and multi-core cables.

Single core cables mainly use various insulation materials to wrap multiple strands of copper wire inside the insulation layer as a current conductor for a certain phase.

A multi-core cable is a complete cable formed by twisting multiple insulated wire cores together and wrapping them with an outer sheath.

The number of insulated wire cores for power cables is usually 1, 2, 3, 4, 5 cores, as well as 41 and 32 cores.

The main advantages of cables are flexible selection and strong environmental adaptability, but they also have inherent limitations.

Bus ducts generally adopt plug-in installation and tapping methods.

1. Basic structure of busbar:

2. Structural features:

1) This series of enclosed busbar trunking has excellent short-circuit resistance performance. Due to the protection of the aluminum (or weak magnetic steel plate) shell, it can effectively reduce the structural heating caused by eddy currents or circulating currents, lower the temperature of the enclosed busbar shell, reduce electrical energy loss, increase current carrying capacity, and reduce electric force.

2) This series of enclosed busbar trunking structures is advanced, and installation and maintenance holes can be freely set at the upper or lower part of the enclosed busbar. For high current indoor enclosed busbars, ventilation louvers are installed on both sides and the lower part of the shell to enhance heat dissipation and reduce temperature rise.

3) The use of double insulation and multi-point connection grounding of the shell significantly reduces maintenance workload and improves safety performance.

4) The use of corrugated pipe expansion joints is simple to install and allows for adjustment of two degrees of freedom in both horizontal and vertical directions. It not only meets the expansion and contraction requirements caused by different temperature drops and thermal expansion and contraction, but also compensates for errors caused by foundation settlement, solving the problems of poor protection level, inconvenient installation, and unreliable operation of traditional sliding plate expansion and contraction devices.

5) In order to solve the adverse effects of vibration generated during the operation of transformers, generators, and distribution cabinets on enclosed busbars, soft connections or copper braided tapes are used outside their connection with the enclosed busbars, and rubber pads are added between the shells to reduce vibration; For the busbar trunking body, the price of pouring waterproof busbar trunking, installing shock absorbers in the system, and achieving elastic support for ceramic flat and conductive bars effectively avoid the damage caused by mechanical vibration waves generated by the shell to the enclosed busbar.

1000A fully insulated epoxy resin waterproof pouring type bus ductBus ducts are becoming increasingly widely used in low-voltage power supply and distribution projects, and the demand for bus ducts in medium and high voltage transmission and distribution lines is gradually increasing. For medium and high voltage bus ducts ranging from 6kV to 35kV, most of the insulation structures use air insulated common box busbars. Due to the large volume, heavy weight, and space occupation of common box busbars, which cause great inconvenience to installation, insulation types such as resin casting, cross-linked polyethylene module assembly, and re casting of inner insulation brackets have also emerged in the market to replace common box busbars.

Live parts - Conductors or conductive components used to conduct electricity in normal use, including neutral conductors but excluding neutral protective conductors. Conductive component - a touchable conductive component of electrical equipment, the Handan busbar trunking, which is usually not charged but may be charged in the event of a fault. Protective conductor - a conductor that is electrically connected to the following components to prevent danger. Special reminder: Cables are represented by cross-section, while bus ducts are represented by rated working current (generally referred to as 400A bus ducts). Domestic products with the same 400A have a cross-section of 240mm, while some are only 180mm. The difference is too large, so there are some products priced at 1.4 yuan/ampere x meter, 2.0 yuan/ampere x meter, smart bus ducts, and even higher. It is recommended to request the manufacturer to provide an explanation of the insulation method and label the bus specifications to avoid being deceived.

1. The busbar trunking adopts a docking installation method, which makes the installation process of the busbar trunking very convenient, flexible, and greatly saves installation time.

2. The bus duct adopts a separated air insulation type, which improves the heat dissipation of the bus duct and reduces the impedance; The internal insulation components are made of high-strength epoxy resin, which improves the frost resistance and thermal stability of the bus duct.

3. All current levels of bus ducts use a unified cover plate, with high standardization, strong interchangeability, and convenient variable capacity interfaces.

4. Bus ducts can be diverted through plug-in boxes to avoid the troubles of cable stripping and unsafe connections. If your product or equipment is replaced, reassemble and install the busbar, and the busbar socket branch can always reach the position you need

1. The current capacity can be very large;

2. The voltage drop is very small;

3. Strong short-circuit load capacity;

4. High reliability and long service life;

5、 安全性高；

6. The equipment of the power distribution system can be added or changed freely;

7. Small external dimensions;

8. Lightweight and easy to operate;

9. The connection is very simple (just like connecting water pipes, connecting them into a system through tees, elbows, and other joints) as shown in the following figure;

10. Simple construction and inspection;

11. It has a modern aesthetic.

When installing bus ducts horizontally, the height above the ground should not be less than 2.2m, except for those laid in electrical rooms (such as distribution rooms, motor rooms, electrical shafts, technical floors, etc.); The distance between the edge of the bus duct and the wall should not be less than 0.1m, and the distance between its upper surface and the floor, ceiling, or beam bottom should not be less than 0.1m. Two horizontally adjacent bus ducts should be installed: the center distance between bus ducts should not be less than 0.35m, the waterproof bus duct should be IP55, and the edge distance should not be less than 0.1m. When laying the bus duct horizontally, the distance between support points should not be greater than 2.5m (if laying a large-span high-strength bus duct in a workshop, the distance can be greater than 6m). When the bus duct is horizontally installed on the support and hanger, can the waterproof bus duct be waterproofed and fixed with a horizontal fixing plate. The connection point of the bus duct should not be at the wall penetration point, and there should be no sewage or debris entering the interior of the bus duct when installing the wall penetration hole.

Copper bars have low copper content and high electrical resistivity.

People often mention the copper content and resistivity of copper bars, which are indeed related to the current carrying capacity of bus ducts. Copper content reaches 99.95% or ≥ 99.93%, with a resistivity of ρ ≤ 0.01777 (ohms)? The copper bar with a square millimeter per meter is the preferred copper bar among busbar copper bars. If the copper content is low, pouring waterproof bus ducts will increase the electrical resistivity, and only by increasing the conductor specifications can the current carrying capacity and temperature rise be ensured. Otherwise, the temperature rise will be too high.

2. Poor heat dissipation of insulation materials and shell structure.

Normal working conditions

1. Indoor continuous work.

2. The ambient air temperature shall not exceed 40 ℃, and the lower temperature limit shall be -10 ℃.

3. The relative humidity should not exceed 90% (when the ambient air temperature is 20 ℃).

4. When there are special requirements for working conditions, our factory can manufacture according to the special requirements.