SF6 Ring Main Unit

SF6 Ring Main Unit The SF6 ring main unit is designed and developed by our company according to the actual power supply situation. It can be used in the transformation and construction of urban power grids. The products have passed type tests and commissioning inspections, and their performance...

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Description

SF6 Ring Main Unit

The SF6 ring main unit is designed and developed by our company according to the actual power supply situation. It can be used in the transformation and construction of urban power grids. The products have passed type tests and commissioning inspections, and their performance indicators meet the requirements of IEC 298 "AC metal-enclosed switchgear". It has the advantages of small size, light weight, simple operation, safe use, and high reliability. It is not affected by the environment and weather, and is maintenance-free.

Environmental conditions

(1) Applicable altitude: ≤2000m

(2) Temperature: -40℃~+55℃ relative

(3) Humidity: daily average ≤95%, monthly average ≤90%

(4) Earthquake damage level: ≤8

Technical Parameters are shown below

Rated voltage	12kV
Rated current	630A
Rated frequency	50Hz
Rated short-duration (1 min) power frequency withstand voltage	42/48kV
Rated short-circuit breaking current	20kA
Rated short-duration withstand current (4s)	20kA
Rated lightning impluse withstand voltage(to earth/break)	75/85kV
Rated short-circuit making current (peak value)	50/63kA
Rated peak withstand current	50kA
Rated load breaking current	630A
Mechanical service life of vacuum circuit breaker	10000Times
Rated close circle breaking current	630A
5% rated load open current	31.5A
Rated transfer current	1700A