RT-CMC Aluminum Alloy Enclosure Copper Conductor Compact Busway Series

The RT-CMC series aluminum alloy shell dense busbar trunking is a new type of busbar trunking product that integrates advanced technology design, development, and production from similar foreign products. Bus duct system is a flexible and reliable power distribution equipment with high distribution efficiency and simple installation procedures. It is mainly used in chemical, metallurgical, industrial and mining enterprises with 660V and below, cultural sports venues, exhibition halls, archives, museums, airports, stations, commercial buildings and other public places as well as high-rise buildings for power transmission, distribution and supply systems.

Advantages of Dense Busways in Power Systems

Intensive bus duct, also known as dense bus duct, is a key component in power systems, providing a compact, efficient solution for housing multiple conductive bus bars. This innovative technology is designed to achieve higher electrical connection density and is ideal for applications requiring high current power in limited spaces. Dense bus ducts are widely used in industrial plants, commercial buildings, computer rooms and other facilities with limited space and high power demand.

The compact design of Dense Busway allows for more conductive busbars to be accommodated, providing a higher density of electrical connections. This feature is particularly useful in space-constrained environments as it allows more electrical connection points to be made within a limited area. This capability is critical to meet the demands of modern power systems for higher connection density, ensuring efficient power distribution and management.

In addition to their space-saving design, dense busways are known for their excellent heat dissipation and reliable electrical connections. These properties make them ideally suited for a variety of power system applications, providing efficient and safe power distribution. Whether in an industrial setting or a commercial facility, dense busway provides a reliable solution to manage high current power while optimizing space utilization.

In addition, the design of dense bus duct can meet the diverse needs of various power systems, providing multi-functional and adaptable solutions for different applications. Its compact, efficient design coupled with reliable performance make it an essential component of modern power infrastructure. Able to accommodate higher electrical connection densities and provide reliable power distribution, dense busways play a vital role in ensuring the efficiency and safety of power systems in a variety of environments.

In summary, dense bus ducts or dense bus ducts provide a compact and efficient solution for achieving higher electrical connection density in power systems. Its space-saving design, excellent thermal performance and reliable electrical connections make it ideal for applications requiring high current power in limited space. Due to its versatility and adaptability, dense busducts have become an important part of modern power infrastructure, ensuring efficient and safe power distribution in a variety of environments.

Function and Features - Aluminum Shell

1. The overall shell of the bus duct is made of high-quality aluminum alloy material extruded, and the surface is treated with electrophoretic oxidation coloring for strong corrosion resistance.

2. The side plate of the bus duct is formed in the form of a heat sink design combination, which maintains uniform heat dissipation function and can work in environments below 130 ℃ for a long time.

3. The advantage of the cross-sectional area of the bus duct shell being several times larger than that of the phase conductor is that it can be used as a protective conductor and also as a grounding wire, which has a more ideal grounding effect and is safer and more reliable.

4. The aluminum shell of the bus duct belongs to non-magnetic metal, so it has less inductance and less power consumption, overcoming the problem of high current noise in the iron shell bus duct.

5. The aluminum shell of the bus duct is evenly wrapped around the phase lines, close to and equal to each phase, so the reactance is equal and minimal, overcoming the problem caused by traditional grounding methods for a long time in the line Disadvantages of three-phase and high voltage drop.

6. The aluminum shell conductor of the bus duct is densely packed in the aluminum shell, which has the characteristics of anti-corrosion, moisture-proof, dust-proof, and fireproof. It has a beautiful appearance, light weight, good rigidity, and small space occupation, solving the shortcomings of traditional bus ducts.

Function and Characteristics - A Tight "Sandwich" Structure

1. The RT-CMC series adopts a "sandwich" structure with currents ranging from 400A to 6300A, which not only saves space, but also has good voltage drop characteristics when the power is low. The design of a single wire and heat sink makes the system more sophisticated, saving half the space compared to conventional systems under high current conditions.

2. RT-CMCseries busbars use high-grade silver plated copper bars as conductor materials. The outer surface coating of the conductor bar has the ability to increase the rated current value and provide good anti-corrosion protection.

3. RT-CMCseries electrical conductors are tightly integrated, with small gaps, low reactance, good heat dissipation, low temperature rise, good thermal stability, large current carrying capacity, and excellent energy-saving effect; A simple fully enclosed structure with a protection level of IP65 or higher.

4. All RT-CMCseries busbars use B-grade 130 ° C polyester film to achieve long-term insulation. The insulation medium of the bus duct is three layers of 0.6mm thermoplastic polyester adhesive wrapped around the conductive busbar. The temperature and pressure resistant silicone strip is used as a filling material to achieve a fully enclosed structure for electrical conductors, achieving long-term insulation effect. The factory withstand voltage test reaches 3750V, ensuring that the quality meets the national GB standard.

Technical Analysis

Product Model of Bus Duct

Reasonable Matching Design of Bus Duct

1.The busbar trunking from 1.400A to 6300A, with bolt connectors as standard accessories, can be quickly disassembled and reconnected during load changes or maintenance. It can be installed or removed at any end of the busbar trunking. The system accessories are all standard accessories, which eliminates the need for special connection covers for the connection of feeder and plug-in busbars. Universal accessories can simplify installation and maintenance.

2. The connection space inside the bus duct is enclosed by a special partition, which can prevent thick smoke and gas from spreading through the bus duct in case of fire in the area where the bus duct is installed. This internal partition allows the bus duct to pass through walls or floors without forming a "smoke halogen effect" combustion path.

3. The connecting bolts are made of 8.8 grade high-strength standard accessories, which can ensure that the user tightens the connection to the appropriate torque with a wrench. A red "WD"label will come off,indicating that the connection has reached the required torque. The same bolt has another bolt head reserved for future maintenance or disassembly. Another square pad ensures even pressure across the entire contact surface to ensure proper electrical connection.

Unit Model of Bus Duct

Example: RTMC37T-1250A/4-3000 represents a four wire straight copper conductor dense busbar with a rated current of 1250A and a length of 3000mm.

Technical Parameters of Bus Duct

1: Rated insulation voltage (V): 690 

2: Rated operating voltage (V): 380

3: Power frequency impulse withstand voltage (v/min): 3750

4: Rated working current (A): Bus duct: 400, 500,~5000, 5500, 6300, diversion box: 63, 250, 400, 630

5: Rated ultimate short-circuit breaking capacity IOU (KA) splitter box: 5, 20, 30

6: Rated short-time withstand current IOW (KA/S) bus duct: 20, 50, 65, 100

7: Rated peak short-time withstand current IDK (KA) bus duct: 40, 105, 143, 220

8: Protection level: IP40~IP65

Special wiring for protective conductor (PE) of the shell: 12, 30, 39, 60

Bus duct shell: 24, 63, 82, 132

Sectional Diagram of Integral Grounding Busbar

High Quality Insulation Materials

All busbars are made of B-grade 130 ℃ polyester film to achieve long-term insulation. The insulation medium of RT-CMC bus duct is three layers of 0.188mm DuPont polyester film, laid flat on the surface of the conductive busbar. Achieve high temperature and high pressure resistance.

High Quality Conductors

All busbars use high-grade silver plated copper bars as conductor materials. The outer surface coating of the conductor bar has good anti-corrosion protection.

Short Circuit Withstand Strength and Testing

The design of RT-CMC bus duct provides short-circuit withstand strength performance, suitable for electrical systems used in today's industrial and commercial buildings. The entire system meets the UL3 frequency rating standard.

Low Voltage Drop

The RT-CMC bus duct system has the advantage of low voltage drop, which can save you long-term investment.

Internal Smoke Partition

The connection space inside the RT-CMC bus duct is enclosed by a special partition, which can prevent thick smoke and gas from spreading through the bus duct in case of fire in the area where the bus duct is installed. This internal partition allows the bus duct to pass through walls or floors without forming a "chimney effect" combustion path.

Low Temperature

Due to the use of a sandwich style design structure and high-quality silver plated copper bars, the temperature rise of the busbar will not exceed 55 ℃ of the ambient temperature.

Low temperature

The RTMC37 bus duct provides a standard enclosure structure with a protection level of IP65 to meet the different applications and requirements of users. The indoor protection level can reach IP55, and the outdoor protection level can reach IP65.

RT-CMC Technical Parameters

Specification of Three-phase Four Wire Bus Duct

Benchmark:

External temperature：40℃

Maximum temperature increase：

70°C Copper conductor at 70°C

Shell：55℃

Frequency：50-60Hz

Voltage drop of busbar under different loads

RTMC37Tat 50Hz and load power due to Between 0.5 and 1.0, the voltage drop per meter is as follows As shown in the picture.

Technical Parameters of RT-CMC Copper Conductor Busbar

The temperature rise of a conductor is related to the current as follows: T=55 * (load current/rated current)^1.7

Copper conductor adopts 55 ℃

For example, when a busbar with a rated current of 3000 amperes operates at 2500 amperes,

Temperature Increase is：T=55(2500/3000)^1.7=40° C

Short Term Emergency Overload and Temperature Rise

Transient overload is very common during use, as long as it does not exceed the design limit of its conductor, it is allowed. In terms of temperature rise design, the external temperature is 40 ℃ , and the temperature rise of copper conductors is 55℃ . When operating the bus duct at a current above the rated current for a short period of time, the temperature rise must be considered simultaneously. In the appendix, it is convenient to separately represent the relationship between overload,

temperature rise, and time under different rated currents.

For example:

(i) a 5000 ampere bus duct can withstand a current of 8300 amperes within one hour starting from zero load.

(ii) The temperature rise of the 4000 ampere bus duct is 43 ℃ under stable operation of 3000 ampere current.

Note: When using bus ducts, some issues such as voltage drop and thermal expansion must be considered simultaneously.

RT-CMC Bus Duct (200A-6300A) Starting End Details

All dimensions are in millimetersw

Detailed Diagram of RT-CMC Starting End

Plug-in Shunt System (Plug-in Box)

To cope with power distribution applications, RT-MYC wire busbar is a shunt box that can accommodate protective devices.

The plug-in system has undergone temperature rise and short-circuit testing and fully complies with international standards (IEC 439Parts1-1992) and national standards (GB7251.2Parts1-1997). The position of the shunt box can be designed

according to customer needs, and the 3.6-meter standard length linear component can accommodate up to 3 shunt points.

Plug in electrical boxes can be installed or removed under the power supply state of the busbar. The electrical box itself has enough space to connect wires. The electrical box is also equipped with special interlocks to prevent it from being opened or removed during use.

Characteristics of the shunt box for plug-in protective devices

Test standard: IEC439 Parts1-1992 GB7251.2 Parts1-1997

Rated current: 20 amperes to 400 amperes (plug-in or bolted connection)

400 to 800 amperes (bolted connection type)

Rated voltage: 500VAC (50Hz) (Customers can provide special requirements)

Safety design: The grounding contact is first connected to the wire busbar, allowing it to be energized

Install the safety lock for the box door, connect the wire harness and the lock for the electrical box connection

Soft Connection Device

Due to the vibration generated by the transformer during operation, in order to prevent the vibration from propagating to the bus duct itself, a soft connection is used for the connection of the low-voltage side bus of the transformer, as shown in the following figure.

Program for Installing Connection Bits

outline

The following program is a guide for installing connection bits. Following the following procedure can ensure the sealing of the connection position. Regardless of the environment on the construction site, the following guidelines must be followed to prevent moisture from seeping into the bus duct. When the bus duct is delivered to the construction site, it is sealed with plastic bags to prevent moisture from seeping in during transportation or storage. So the plastic bag cannot be removed before installing the connection position.

Basic Steps for Installing Connection Positions

Before connecting, use an insulation meter to check if the insulation of the bus duct is good.

1. Shrink the packaging with a rubber sleeve towards the center of the busbar, and then remove the grounding strip and cover.

2. Check whether the conductor and insulation sheet are damaged and whether the surface of the conductor is smooth. The end of the conductor is coated with lubrication Agent. If foreign objects are found, they must be removed immediately. To prevent moisture from seeping in, it is necessary to ensure that the sealing rubber ring at the broken end is installed correctly and reliably.

4. Connect the two busbars by sliding, and place the installation ruler (whose size should be different from the busbar current) on Be careful not to compress the insulated rubber hose between the two busbars until they collide The position must be correct.

5. Loosen the connecting bolts and washers, thick connecting plates and spring washers, and apply silicone sealant around the bolts.

6. Install bolts and washers.

7. Tighten the nut, the required torque for M12 bolts is 70N, and the required torque for M14 bolts is 120N.

8. Install the small connecting bolts.

9. Apply silicone sealant to the trapezoidal groove when connecting the heat dissipation plate, and lock the sealing cover tightly.

10. Install the grounding strip.

11. Conduct insulation testing to ensure the correct installation of the bus duct, and then move the packaging rubber sleeve to its original position, Ensure that the busbar is not contaminated or damaged before power transmission. Before formal power transmission, the rubber sleeve used for packaging the busbar should be removed.

Another Installation Method：

If it is not possible to install the edge connector according to the basic steps due to space limitations or other reasons, you can connect it from the side as follows:

1. Follow the first, second, and third steps of the basic procedure.

2. Remove the connecting connector and temporarily fix the four bus ducts to ensure their spacing and installation dimensions equal.

3. Press the connecting connector into the side.

4. Check the status of the connection bit at this time, which should be no different after completing the fourth point of the basic steps.

5. Follow the basic steps from point five to continue the installation.

Vertical (Vertical Shaft) Installation Diagram

Note: In order to ensure safe use and operation, spring supports must be added to each floor or vertical installation height of high-rise buildings with a height greater than 4m to support the load of each floor's bus duct and for vertical adjustment.

RTMC37 Busbar Vertical Shaft Installation Reserved Hole and Wall Installation Schematic Diagram

Note: When adjacent bus ducts have plug-in boxes at the same height, an appropriate distance should be left between the bus ducts to ensure convenient insertion and removal of the plug-in boxes. When installing the busbar horizontally, it can be lifted or supported by brackets along the wall for installation and laying of the busbar trough, and the distance between the busbar trough and the side wall surface should be ensured, so that the plug-in box can be smoothly inserted into the busbar.

Installation Acceptance

After the installation of the bus duct is completed, it is necessary to inspect all connection points and the grounding wire of the shell for reliability and omissions, and conduct a comprehensive performance check according to electrical specifications.

After the horizontal installation or vertical shaft installation of the bus duct, it is required that the horizontal straightness and verticality of the bus duct shall not exceed ± 5/1000.

After the installation of the busbar trunking is completed, all power supply terminals and branch leads are cut off and not connected to electrical equipment. At room temperature, a 1000V megohmmeter is used to measure the insulation resistance between phase and phase. The insulation resistance between phase and ground is ≥ 20M Ω. If the temperature is above 30 ° C and the relative humidity is above 90%, the insulation resistance is not less than 0.5M Ω. After baking, the insulation resistance can significantly increase. The insulation withstand voltage is 2000V per minute and there is no flashing phenomenon. Then it can be connected for power on trial operation.

Site Diagram of RT-CMC Copper Conductor Busbar