Medium Voltage Fuse Cutouts

Medium voltage fuse cutouts or dropout fuses come in a range of voltages of 24kV-100A and 125kV BIL – 8kA. There are three main versions: Normal insulation fuse cutout with porcelain insulator, Heavy insulation fuse cutout with porcelain insulator and finally Heavy insulation fuse cutout with HTV silicone rubber insulator.

Description

The venting type fuse cutout gives (provides) a full range voltage protection, with maximum of 24kV, of overhead electricity distribution systems even if applied to capacitors, cables, lines or transformers. Medium voltage fuse cutout is described by the term of ‘’full fault spectrum protection’’ which translates to interruption of all faults during the lowest and highest current, which will melt the fuse’s link. The recovery of the fuse cutout is operated by ‘’down and away’’ feature where the exhaust component must be isolated from the other phases in overbuilt circuits. 

System Characteristics

  • Nominal voltage(kV): 20
  • Maximum voltage(kV): 24
  • Nominal frequency(Hz): 50
  • Short circuit level(MVA): 250
  • Impulse withstand voltage: 125kV, 1,2/50μsec

Our company can provide the three basic types of fuse cutout.

1. Normal insulation fuse cutouts with porcelain insulators (LN type)

  • Rated voltage(kV): 20
  • Rated current(A): 100
  • Interrupting current(kA): 7.2
  • Power frequency withstand voltage, wet(kV): 50
  • Power frequency withstand voltage, dry(kV): 60
  • Lightning impulse withstand voltage, BIL(kV): 125
  • Creepage distance minimum(mm): 400
  • Net weight(kg): 10.0

2. Heavy insulation fuse cutouts with porcelain insulators (LH type)

  • Rated voltage(kV): 20
  • Rated current(A): 100
  • Interrupting current(kA): 7.2
  • Power frequency withstand voltage, wet(kV):50
  • Power frequency withstand voltage, dry(kV):60
  • Lightning impulse withstand voltage, BIL(kV):125
  • Creepage distance minimum(mm):530
  • Net weight(kg): 10.5

3. Heavy insulation fuse cutouts with synthetic insulators (LSH type)

  • Rated voltage(kV): 20
  • Rated current(A): 100
  • Interrupting current(kA): 7.2
  • Power frequency withstand voltage, wet(kV): 50
  • Power frequency withstand voltage, dry(kV): 60
  • Lightning impulse withstand voltage, BIL(kV): 125
  • Creepage distance minimum(mm): 530
  • Net weight(kg): 10.0
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