RT-GFM High-Voltage Enclosed Common Enclosure Busway

Product Overview

RT-GFM High-Voltage Enclosed Common Enclosure Busway is specifically engineered for electrical connections between high-voltage switchgear (rated for 6kV,10kV,20kV,and 35kV)and transformers.It is widely deployed in power supply systems for large industrial plants,major substations,captive power plants in large enterprises,large-scale construction projects,and connections between generators and step-up transformers,ensuring reliable power distribution across critical infrastructure.

The product adopts a segregated phase structure,where each phase is individually insulated  and housed within a robust alloy enclosure,meeting stringent standards for insulation  performance and operational safety.By separating the three phases in air,it achieves balanced three-phase voltage distribution,reduced temperature rise,high current- carrying capacity,and straightforward installation,enhancing system efficiency and longevity.

The busway is equipped with intelligent monitoring devices along its entire length, providing real-time insights into system performance and ensuring secure power supply operation.It incorporates a dedicated control wire trench,simplifying installation and maintenance processes while optimizing space utilization.

The busway's side panels are constructed from heat sink-style aluminum-magnesium alloy profiles with a thickness of 3.0mm.The integrated cooling fins not only improve heat dissipation  but also reinforce structural rigidity,allowing side heights of up to 305mm without additional reinforcements.Top and bottom covers are made from aluminum-zinc coated steel,contributing to the overall structural integrity of the assembled busway.Side panels and base plates are securely fastened using high-strength imported rivets,while cover plates are bolted to the side panels for easy access.Each busway section typically includes strategically positioned standard inspection openings on the upper side (optionally on the sides to suit site-specific needs).Advanced manufacturing techniques at inspection points and high-performance expansion joint technology ensure the busway enclosure achieves an IP54 protection rating,delivering durability and resilience in diverse operating environments.

Structural Performance

• The busbar utilizes high-quality copper as the conductor.
• The enclosure is constructed from 4mm premium aluminum alloy plates,designed as fullyenclosed and non-ventilated.It offers corrosion resistance,excellentheat dissipation,and  effective grounding.
• Aspecialized modular assembly design allows flexible installation of large busway sections  without requiring elbows,enabling systematic and standardized design and installation of the busway system.
• The busway enclosure features a smooth and flat surface,which can be painted according to customer requirements.
• A safety clearance of 150mm is maintained between each phase of the busbar,and each section of the busway enclosure is equipped with grounding terminals to ensure continuous and effective grounding after installation.
• The main busbarand support insulators can withstand the effects of rated peak short-circuit current and rated short-time withstand current without experiencing mechanical stress or electrical damage.
• The enclosed busway can withstand a short-circuit current of14=40kAfor 4 seconds,with the short-circuit heating temperature not exceeding the limit,and can endure the mechanical  stress generated by a short-circuit current(lch=100kA).

Working Principle

High-voltage busway adopts a high-strength and high-performance DMC insulation support  block clamping structure,offering excellent load performance and dynamic/thermal stability.It features strong overload capacity and low temperature rise.As a reinforced insulation fully enclosed high-voltage busway,it achieves IP40 protection rating,with conductors fully encapsulated by high-voltage heat-shrink tubing.It can be installed at altitudes up to 2000m.By replacing traditional exposed busbar wiring with enclosed encapsulation,the high-voltage busway significantly reduces power outage maintenance frequency.When transmitting high currents,it eliminates faults caused by uneven current distribution associated with using multiple parallel high-voltage cables, ensuring reliable power supply.

Scope of Application

Common-Enclosure Busway A new type of enclosed busway designed for power supply systems with AC 50-60 Hz,voltage 3.6 kV,and rated current ranging from 400 A to 6300 A.The RT-GFM series high-voltage common-enclosure busway is suitable for electrical connections between high-voltage transformers and high-voltage switchgear,as well as between generator sets and step-up transformers.

Product Features

• The seriesfeatures excellent short-circuit resistance,with its aluminum enclosureeffectively   reducing structural heating caused by eddy currents or circulating currents,thereby lowering the  busway surface temperature,minimizing energy loss,and increasing current-carrying capacity.
• Flexible structural design allows maintenance accessholesto be positioned freely on the top or bottom.For high-current indoor busways,ventilation louvers are installed on both sides and the bottom to enhance heat dissipation and reduce temperature rise.
• Double insulation and multi-point grounding connections significantly reduce maintenance requirements while substantially improving safety performance.
• Corrugatedexpansion joints enable simple installation and two-dimensional adjustment(horizontal/vertical),accommodating thermal expansion/contraction and compensating for foundation settlement errors.
• Vibration from transformers,generators,and distribution cabinets is mitigated usingflexible  connections (copper braids)and rubber pads between enclosures.Additional shockabsorbers provide elastic support for insulators and conductors.
• The exterioris painted light gray to reduce visiblelight absorption,while the interior uses black paint to enhance  radiant  heat transfer and prevent corona discharge.
• All joints are silver-plated to increase allowable temperature rise to 65K,resisting electrochemical corrosion in coastal/industrial atmospheres and reducing contact resistance.
• Sealed inspection windows at connection pointsallow temperature monitoring via indicators  orinfrared sensors.Current transformers can be installed at generator outputs/exciter transformer primaries for current measurement.

Technical Parameter

Rated power-frequency dry withstand voltage(1min),Rated lightning impulse withstand voltage,Rated operational voltage, Maximum operational voltage

Permissible Temperature & Temperature Rise(Ambient Temperature:40℃)