Eight characteristics of insulated tubular busbar
Low loss
The shape of the busbar determines its low surface skin effect coefficient, Kf≦1， The communication resistance is small, so its power loss is small.
Large current carrying capacity
The main body of the busbar is a hollow copper or aluminum tube with a large surface area. Compared to conventional rectangular busbars, the current density distribution on the conductor surface is uniform. The maximum constant current of a single tube busbar can reach 16000A.
Good insulation performance
The tube busbar adopts shielding insulation method, with an external potential close to zero potential, uniform distribution of surface electric field, and reduced end electric field span. It can be directly laid in the electric buffer trench or cable interlayer.
Long product lifespan
The main insulation material is EPDM rubber, epoxy resin, or polytetrafluoroethylene. These materials have the advantages of good insulation performance, low dielectric loss, and good weather resistance, which can ensure the service life of the insulation tube busbar is ≥ 30 years.
Strong anti vibration ability
The results of the dynamic stability test show that a copper tube busbar with a voltage of 10KV and a rated current of 4000A can withstand a short-circuit current surge of 63kA (4s). The busbars can be directly fixed on steel frames or concrete supports, eliminating the need for wall sleeves and post insulators, and have strong anti vibration capabilities.
Good heat dissipation and low temperature rise
The tube busbar is a hollow conductor, and when there are ventilation holes at both ends, it can naturally form hot air convection through the inner holes, and the heat dissipation conditions are better than conventional busbars.
Not affected by environmental interference, high reliability
Due to its enclosed shielding insulation, there is no condensation inside, and it eliminates grounding and phase to phase short circuit faults caused by external moisture, dust, and foreign objects, providing high operational reliability. The protection level can reach up to IP68.
Not affected by environmental interference, high reliability
The busbar architecture is concise, clearly arranged, and easy to install. After successful installation, the product is basically maintenance free.
2. Introduction to the Operating Environment
normal condition
-Installation location: indoor/outdoor and in tunnels, channels, and mezzanines
-Altitude: 1000m
-Ring embankment temperature: -40'C~+40 ° C
-Daily resolution intensity: 0.1w/cm
-Maximum wind pressure: 700Pa
-Maximum relative humidity: daily average not exceeding 9896, monthly average not exceeding 95%
-Thin ice thickness: not exceeding 20mm
-Seismic intensity: VI level, horizontal acceleration of 0.258, vertical acceleration of 0.125g
-Pollution level: Level IV
-Creepage distance: 3.1cm/kV
-Please explain if the altitude is above 1000 meters
ELECTRICAL CHARACTERISTICS
-Rated voltage: 0.4kV-72kV
-Rated current: 400A-20000A
-Rated frequency: 50Hz
-Busbar temperature rise: 50K
-Partial discharge level: The apparent discharge capacity at 1.5Um/3 voltage is not greater than 10PC | The apparent discharge capacity at 1.05Um/3 voltage is not greater than 7PC
Service life
Service life: greater than 30 years
Specific applications
In addition to being suitable for connecting transformers to switchgear and switchgear to switchgear, it can also be used in the following places:
Generator - Generator Circuit Breaker - Transformer (Power Plant)
Transformer, current limiting reactor, and switchgear (substation)
Connection of auxiliary electrical equipment
Except for power plants and substations, any factory, public building facility, civilian facility, as well as offshore platforms and ships that use high current can use the green tube star
Introduction to Busbar Structure
Extrusion type: (three-layer co extruded insulation tube mother structure)
1, Conductor 2, inner semiconductor layer 3, main insulation layer 4, outer semiconductor layer 5, shielding layer 6, outer protective layer
Ethylene propylene diene monomer (EPDM) is a non-polar insulation material with excellent electrical insulation properties, corona resistance, ozone resistance, high heat resistance, strong weather resistance, and excellent aging resistance. Even under harsh conditions, it ages slowly and has a long service life.
Casting type: (Vacuum impregnated epoxy resin insulation tube mother structure)
1, Conductor 2, main insulation layer 3, shielding layer
High performance epoxy resin with high insulation performance, strong structural strength, and good sealing performance is used as the main insulation material.
