Hubei Dayu Hanguang Vacuum Electric Co.,Ltd.
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Embedded Poles
  • Product name:

    Embedded Poles

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    Category: Embedded poles
    Model: HEP1-12/1250-31.5A
Product details

HEP1-12 1250-31.5A 12 1250-25A.jpg

HEP1-12 1250-31.5A 12 1250-25A-2.jpg


Main Technical Parameter
Rated voltage12kV
Rated current1250A
Rated frequency50Hz
Rated short-time Power frequency withstand voltage48kV
Rated lightning impulse withstand voltage85kV
Rated short-circuit breaking current25/31.5kA
Rated short-circuit making current(peak)63/80kA
Breaking operations of rated short circuit breaking current30 times
Rated breaking current of single capacitor bank630A
Rated short-time withstand current25/31.5kA
Rated peak withstand current63/80kA
Rated duration of short-circuit4 s
Mechanical endurance30000 times
Closing force due to bellow and atmosphere120±30N
Force required to hold contacts open at full storke210±30N
Circuit resistance at lowest rated contact force≤25μΩ
Contacts limit erosion3mm
MECHANICAL DATA REQUIRED FOR THE MATCHED VACUUM SWITCHGEAR
Clearance between open contacts9±1 mm
Average opening speed1.2±0.2m/s
Average closing speed0.6±0.2m/s
Rated added extemal contact final force3100±200N
Contact bouncing duration at closing operation≤2 ms
Closing and opening non-simultaneity of three-phase contacts≤2 mm

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