RT-CMC Compact Busway

RT-CMC Series Low-Impedance Compact Busway uses a typical sandwich structure with closely arranged conductors for overall heat dissipation. The compact design occupies less space, making it a safe and reliable power distribution system. The product's protection level can reach up to IP66 according to user needs. It is suitable for three-phase three-wire, threephase four-wire, and three-phase five-wire systems (with enclosure as PE, or with PE crosssection half of phase line), frequency 50-60Hz, rated operating voltage up to 690V, rated insulation voltage up to 1000V, and rated operating current 250-6300A power supply systems. It features stable reliability, high power distribution efficiency, good heat dissipation, low voltage drop, high mechanical strength and easy installation. The product can be widely used in large commercial plazas, buildings, stadiums, hospitals, industrial plants and other projects as an efficient power transmission and distribution system for high currents. The aluminum alloy shell design not only reduces the weight of the busway, but fully considers the high stability requirements of vertical shaft installation, improves system reliability and applicability, and greatly reduces the impact of high-current eddy current and hysteresis loss on the busway system.

Series Power Busbar Number System

Example: RT-CMC 105265-3 indicates:

Model: RT-CMC, current rating: 1000A, five-wire system (with independent PE busbar), protection class: IP65, length: 3-meter copper busbar straight section.

Compact Busway System

RT-CMC Compact Busway is a new type of compact busway system developed by Zhejiang Rutong Electric specifically for the characteristics of the Chinese market, designed to better meet user needs. The system has been upgraded with a higher degree of automated production, enabling it to fulfill the power distribution requirements of diverse user groups.

01) Transformer Incoming Line Unit

02) Fire Barrier

03) S8 Low-Voltage Cabinet Feeder Unit

04) Straight Unit

05) Direction Change Unit

06) Tap-off Unit

07) Installation Accessories

System Components

System Components - Basic Description

The RT-CMC Compact Busway System can be used for connections between transformers and distribution cabinets, as well as for supplying power to loads. The system's protection rating can reach up to IP65, enabling it to adapt to various harsh environments. The tap-off box provides a maximum rated output current of 1250A, offering users a reliable load environment, while the high protection rating ensures the safety of maintenance personnel.

01 Transformer Incoming Line Unit

Equipped with dedicated flexible connection device Maximum rated current reaches 4000A

02 Fire Barrier Grille

Complies with GA/T 537-2005 standard

Flame Retardancy Test

03 Low-voltage switchgear feeder unit

Line Entry from Top

Line Entry from Bottom

04 Straight Unit

Wall sleeve kit can be added as required

Feeder Type and Plug-in Type

● Standard lengths

RT-CMC：4m/3m/2m/1m

● Optional lengths

RT-CMC：0.4-3.99m

● Suitable for both vertical and horizontal installation

Protection rating IP54 (can be upgraded to IP65)

04 Plug-in Busway

● Single-sided tap-off openings

● Double-sided tap-off openings

● Tap-off openings provide IP54 protection rating

● Can effectively prevent incorrect phase connection

05 Direction Change Unit

Conveniently reroute a section of busway

Angle range: 70-175 degrees

L-Type Unit

T-Type Unit

Z-Type Unit

06 Tap-off Unit

Tap-off Box (up to 1250A)

06 Installation Accessories

End Unit

Connector

Mounting Accessories

Connection Tools

Products Features

Intelligent Connector

Single bolt clamping structure, fast and reliable installation;

Double head fixed toraue bolt to ensure the required pressure of connection；

It is equipped with special dish spring to ensure the lasting pressure between thecontact surfaces force;

The clever concave and convex groove design on the edge of the insulation partitionincreases the creepage distance to leave;

Aluminium Alloy Shell

Busway groove adopts two-piece aluminum alloy profile shell, light weight, machine Hiah mechanical strenath; Effectively avoid eddy current and hysteresis loss caused by the bus slot system Influence;

All aluminum housing has excellent electrical conductivity, the overall housing has 50% to ground capacity on;

The special serrated heat sink greatly improves the heat dissipation of the bus system Force;

Special surface treatment, the shell can withstand 2000 hours of salt spray test;

Different from the traditional busway groove shell by two pieces of assembly,the integrity is stronger, higher protection level;the integrity is stronger, higher protection level.

Plug in box

Easy installation and simple operation;it needs an ordinary wrench to finished plug in box,easily insert the mechanica linkage self-ocking mechanism, it the box have not installed, can not be switching on, or power on,it can not open the box, to prevent misoperation,ensure reliable.

PIN of plug in box

T structure, accurate positioning, universal, stable and reliable.

Products Features

Conductor

High speed sawing, smooth incision without burr, high precision sawing, ensure cutting flat,reduces the temperature rise of the busbar joint;

The copper conductor is made of grade A standard copper treated by special process and divided by spectrum analysis, strict control of trace element content, conductor copper content ≥ 99.97%,under the condition of the same section, the loss of the bus itself is reduced by 3%~5%.Conductor surface processing, unique alloy plating process,lower contact resistance, tin plating,silver plating is optional.

Polyester

Insulation Heat resistance Class B(130℃ );

The voltage can be more than 10000V;

By ROHS standards, no halide, high temperature without toxic gas.

Intensive jack

The busbar at the socket is not bent, the busbar is full-length intensive;

Low impedance,busduct system has lower voltage drop and line loss;

Fast heat dissipation, large tapping capacity, more safe and reliable tapping current;

Reasonable structure, beautiful appearance, high protection level.

Unique error-proof device

Unique anti-error phase device, eliminate manual method to identify and confirm the phase sequence, effectively eliminate human factors caused by misinstallation;

Ultimate Temperature Rise

Copper Busbar 

Aluminum Busbar

Resistance,Reactancc,lmpedance，Power step-down

Series Power BusbarTechnical Parameter

Reference Stand：

1、IEC 61439-1:2011 

2、GB 7251.1-2013"GB 7251.6-2015 

3、XF 537-2005 

4、JB/T 9662-2011

Ingress protection：

Based on different applications, Busbar protection can rcach lP66

● IP40 一一“4” means preventing solid with diameter of not less than 1mm from entering into the shell;“0” means unprotected；

● IP42 一一“4” means preventing solid with diameter of not less than 1mm from entering into the shell;“2” means protecting against water dripping；

● IP54 一一“5” means dust-proof.“4” means drop-proof；

● IP65 一一“6” means dust-tight.“5” means water-proof；

● IP66 一一“6” means dust-tight.“6” means strong water-proof.

Straight Length：

The straight length without outlets.

The standard length is either 3000mm or 4000mm,the minimum length is 460mm.

Note: The width is uniformly 125mm

Single-deck

RT-CMC-04~25

RT-CMA-02~20

Dual-deck

RT-CMC-32~50

RT-CMA-25~40

Trinal-deck

RT-CMC-63

Short Circuit Current Rating：

The RT-CMC busway provides stable and efficient power transmission, featuring exceptional short-circuit withstand capability validated by third-party CCC certification.

Copper

Aluminum

Function Uint

Straight Length

Feed-in straight length bears loads from power source, without a socket.

Standard length is 3000mm or 4000mm ,the minimum length is460mm.

Standard Length: RT-CMC L=1、2、3m

Optional Length: RT-CMC L=0.46~2.99m

Standard Length: RT-CMA L=1、2、3m

Optional Length: RT-CMC L=0.46~4m

Plug-in Straight Length

Plug-in busways feature flexible tap-off opening configurations, with openings possible on both sides. A standard 3-meter section can accommodate up to 5 openings per side. Users may reserve tap-off openings in advance to accommodate future equipment relocation or additional loads.

Each tap-off opening is equipped with a socket plate and a cover plate. The socket plate prevents accidental finger contact with live conductors (IP2X) and displays phase sequence identification.

The cover plate protects conductive contact surfaces from contamination, with gaskets providing dust and moisture resistance.

Standard lengths are 3000mm or 4000mm, with a minimum length of 720mm. The minimum L1 (distance from tap-off opening center to standard end) is 360mm, and the minimum L2 (center-tocenter distance between adjacent tap-off openings) is 570mm.

Standard Length: RT-CMC L=1、2、3m

Optional Length: RT-CMC L=0.72~2.99m

Standard Length: RT-CMA L=1、2、3m

Optional Length: RT-CMA L=0.72~4m

Vertical Elbow

Applicable to change the busbar route toward the vertical direction

Standard Length: 

RT-CMC-04~12 X/Y=0.4m

RT-CMC-16~25 X/Y=0.55m

RT-CMC-32~50 X/Y=0.8m

RT-CMC-63 X/Y=1m

Standard Length:

RT-CMA-02~10 X/Y=0.45m

RT-CMA-12~20 X/Y=0.55m

RT-CMA-25~40 X/Y=0.85m

Function Uint

Horizontal Elbow

Applicabe to change the Busbar route towards the vertical direction

Standard Length: RT-CMC X/Y=0.4m

Standard Length: RT-CMA X/Y=0.4m

Terminal Busbar

Used for blocking the terminal of Busbar route

Note: All data arc for standard products. For customized needs, please contact with our engineer s

T-type Vertical Elbow

Used to add Busbar branches

Standard Length: 

RT-CMC-04~12 X/Y/Z=0.4m

RT-CMC-16~25 X/Y/Z=0.55m

RT-CMC-32~50 X/Y/Z=0.8m

RT-CMC-63 X/Y/Z=1m

Standard Length: 

RT-CMA-02~10 X/Y/Z=0.45m

RT-CMA-12~20 X/Y/Z=0.55m

RT-CMA-25~40 X/Y/Z=0.85m

Function Uint

Z-type Horizontal Elbow

Used for avoiding Busbar obstacles or changing the Busbar route towards the horizontal direction

Standard Length: RT-CMC X=0.4m Y=0.4m Z=0.4m

Standard Length: RT-CMA X=0.4m Y=0.4m Z=0.4m

Vertical Elbow

Used for avoiding Busbar obstacles or changing the Busbar route towards the horizontal direction

Standard Length: 

RT-CMC-04~12 X/Y=0.4m Z=0.4~0.7m

RT-CMC-16~25 X/Y=0.55m Z=0.7~1m

RT-CMC-32~50 X/Y=0.8m Z=1.2~1.5m

RT-CMC-63 X/Y=1m Z=1.5m

Standard Length: 

RT-CMA-02~10 X/Y=0.45m Z=0.4~0.7m

RT-CMA-12~20 X/Y=0.55m Z=0.7~1m

RT-CMA-25~40 X/Y=0.85m Z=1.2~1.5m

Nonstandard Elbow

Used for avoiding Busbar obstacles or changing the Busb ar route towards the horizontal direction

Standard Length: 

RT-CMC-04~12 X=0.4m Y=0.4m Z=0.4m

RT-CMC-16~25 X=0.4m Y=0.55m Z=0.6m

RT-CMC-32~50 X=0.4m Y=0.8m Z=0.8m

RT-CMC-63 X=0.4m Y=1m Z=1m

Standard Length: 

RT-CMA-02~10 X=0.4m Y=0.4m Z=0.4m

RT-CMA-12~20 X=0.4m Y=0.55m Z=0.6m

RT-CMA-25~40 X=0.4m Y=0.85m Z=0.8m

Function Uint

Start Busbar

Start Busbar and start box can match any type of switch cabinet and transformer. Users can also determine the spacing between busbay based on own needs.direction

Start Connections

Three-Phase Four-Wire System

Three-Phase Five-Wire System (Enclosure as Grounding Conductor)

Three-Phase Five-Wire System (with internal 50% cross-section as PE busbar)

Copper Busbar

Aluminum Busbar

Function Uint

Cable Entry BoX

● Individual cablc entry units arc used to implement feeding or receiving power with a section of the Busbar or it is the device that used without overcurrent protection.

● The maximum current of the cable entry unit is 5000A.

● Both multi-corc and singlc-corc cablcs can be used in the cable entry boxes.As long as thecable section does not exceed 300mm2 , it can be installed directly in the cable entry box

Correct 

Against

Plug-in Box

● The plug-in box distributes the electric energy from the bus duct to the load, and acts as the mechanism for breaking the branch current. The plug-in box is the most frequently used branch current by userslt is the key part of current protection.

Cable Entry BoX

● The open circuit protection standard is adopted and the standard currcnt is 16A-630A.

● The 3P or 4P circuit breaker can be installed in the sockct to protcct the load.

● Optional accessories for circuit breakers, such as operation handle, shunt tripping and leakage protectior module arc available.

Function Uint

Transformer Connections

Distribution Cabinet Connection

High Buildings Solution

Factory Solution

On-site Installation

Minimum Distance Between Busbar Installation

Horizontal Ceiling

When installing the ceiling,the steel expansion boltsshould be punched in the floor in advance (can also be punched on site for flexible installation),or the steel parts can be embedded to weld hoisting brackets on site. The distance between adjacent hangers should not exceed 2m There are two different forms when hoisting horizontally, see right pictures.

On-site Installation

Minimum Distance Between Plug-in box Installation

When the buswayis installed horizontally or vertically, certain size must be set aside forplug box.