Epoxy resin waterproof enclosed bus duct

Epoxy resin waterproof enclosed bus ductUsed for power transmission systems in high-rise and super high-rise buildings, the busbar trunking has a large capacity and easy branching. The current can reach 5000A low-voltage busbar trunking, and the busbar trunking can reserve socket branches at any position, which is extremely convenient. Therefore, busbar trunking has been rapidly promoted and applied in construction engineering.

Bus duct has the advantages of small volume, compact structure, reliable operation, high transmission current, easy tap feeding, convenient maintenance, low energy consumption, good dynamic and thermal stability, and long service life.

Bus ducts are suitable for various power transmission main lines, including high-voltage bus ducts and low-voltage bus ducts. Power transmission from transformers to distribution cabinets in high-rise buildings, industrial plants, airports, docks, subways, and comprehensive construction projects, as well as from distribution cabinets to workshops and floors.

When connecting, insert the small end of the bus duct into the large end of another section of the bus duct. Place a matching insulation board between the bus ducts and on the outside of the bus duct, a dense bus duct, and then thread insulation bolts, flat washers, and spring washers. Then tighten the nut with force from the wrench to the specified torque. The air insulated bus duct is then fixed with the upper and lower cover plates. After the bus duct is connected, its shell is connected to a grounding main line. Connect the grounding bolts on the incoming bus duct, distribution switch box shell, and bus duct shell with 16mm2 soft copper wire

(1) Linear busbar unit
Linear busbar unit is used to extend power supply and distribution lines. It is a closed busbar with a tap changer and a plug-in box used to distribute power loads.
(2) Starting busbar unit
The starting busbar unit is matched with the starting incoming box to form the connection component between the busbar and the cable. The starting busbar unit can also be connected to transformers or distribution cabinets.
(3) Expansion busbar unit
The expansion busbar unit is used to absorb the axial variation of the busbar caused by thermal expansion. When the length of the busbar exceeds 80m, a section of expansion busbar unit should be installed.
(4) Variable diameter busbar unit
Variable diameter busbar units are used to connect different rated current units in the same system, in order to make the power supply of the entire busbar system more economical and reasonable.
(5) Various busbar bending units
There are four types of busbar bending connection units: L-shaped, T-shaped, Z-shaped, and+- shaped. They are used for connecting and changing the direction of horizontal and vertical power supply and distribution, and can flexibly connect busbar systems.

Epoxy resin waterproof enclosed bus duct

1. Installation location: indoor, outdoor
2. Insulation resistance: The insulation resistance value of each enclosed busbar unit should be greater than or equal to 100M Ω (2500V megohmmeter).
3. Dielectric strength: Each section of the enclosed busbar undergoes a 1-minute power frequency dry test voltage withstand test before leaving the factory.
The power frequency withstand voltage and lightning impulse withstand voltage values meet the standards.
4. Grounding system: Complies with the requirements of IEC364-5-54 for grounding systems.
5. Protection level: Indoor type: IP40; Outdoor type: IP43, IP55.

室外防水：

When installing the bus duct outdoors, it is necessary to consider the waterproofing of the bus duct. Water ingress during use will inevitably lead to insulation degradation, and prolonged operation can result in short circuits and damage to the bus duct. In such cases, protective measures should be taken.

Notes:

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. Therefore, using busbar trunking for power distribution can satisfy you for life

Generally designed for indoor use, the humidity in the air does not affect the operation of the bus duct. However, if water enters the bus duct during use, it will inevitably cause insulation reduction, and long-term operation will cause short circuits and burn out the bus duct. Therefore, installation methods that may cause water ingress into the bus duct should be adopted.

There are no air gaps, no chimney effect, and busbar burrs or overloads will not cause short circuits. The all aluminum magnesium alloy shell is designed to be sealed, with a protection level of up to IP54;
- Structural design to enable the busbar system to have * anti short circuit capability and mainline harmonic function;
High protection level, low impedance design, and low voltage drop configuration make the busbar suitable for various long-distance and harsh environmental operations;
The overall volume of the bus duct is small and it has various flexible functional units;
Whether it is horizontal or vertical installation, horizontal or vertical shaft installation, it has a stable installation plane; And the current carrying capacity is not affected by any installation form;

Usage conditions:

1. The altitude of the installation site shall not exceed 2000 meters.
2. The relative temperature of the surrounding air is not greater than 90%
3. The temperature of the surrounding medium shall not exceed+40 ℃, not be lower than -25 ℃, and its average temperature shall not exceed+35 ℃ within 24 hours
4. In a medium without explosive hazards, and without gases and dust that can corrode metals and damage insulation.
5. A place without rain or snow invasion. (If unable to meet the requirements, special customization is available)

6. In addition to normal operation under the above conditions, dense aluminum composite bus ducts are also suitable for working in places where the relative air temperature is not greater than 95% and there is condensation and mold.

Usually, the busbar cross-section should be selected based on the long-term operating current. And verify the short-term thermal stability and dynamic stability of the bus duct under the condition of passing through the short-circuit cable. Due to factors such as the resistance of conductors and the AC current meter effect when multiple conductors approach each other, heating can occur when current passes through the bus duct. The allowable temperature for heating during long-term operation of copper and aluminum bare bus ducts is 70 ℃. However, when the contact surface is reliably covered with tin (such as ultrasonic tinning), the allowable temperature for resin bus ducts can be increased to 85 ℃. Due to the limitation of this continuous heating allowable temperature, bus ducts of different materials and cross-sections are given corresponding long-term allowable current values. When selecting a bus duct cross-section, the actual long-term operating current of the bus duct should be lower than the long-term allowable current value of the selected cross-section bus duct.

Reduce electromagnetic radiation: Shielding is a way to achieve electromagnetic compatibility, waterproof bus ducts, and reduce electromagnetic radiation. The surface area coverage of the copper wire loosely wound copper tape wrapped gold shielding is achieved, effectively cutting off the electromagnetic noise propagation path formed by electrostatic coupling, inductive coupling or alternating electromagnetic field coupling in space. The bus duct separates the ground wire system of the two parts of the circuit, cutting off the possibility of coupling through impedance.