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Home arrow Electrical equipment arrow M.V. fuse disconnectors
Medium voltage fuse cutouts PDF 
 fuse cutout

M.V. Fuse Cutouts

  Medium voltage fuse cutouts(dropout fuses),  24KV, 100A, 125KV BIL, 8KA sym, 12 KA asym in three versions: (A)Normal insulation fuse cutout with porcelain insulators, (B)Heavy insulation fuse cutout with porcelain insulators and (C)Heavy insulation fuse cutout with HTV silicone rubber insulators.

 

 

 

 

 

 

 

Description

   This single venting type cutout fuses provide a full-fault spectrum protection of 24kV overhead distribution systems whether applied to overhead transformers, capacitors, cables or lines. 'Full fault spectrum protection' means that cutouts interrupt all faults from the lowest current, that will melt the fuse link, to the maximum rated interrupting current, under all realistic transient recovery voltage conditions. Fuse cutouts employ a single venting 'down and away only', a recovery important feature where exhaust must be kept out of other phases in overbuilt circuits.

The electrical system characteristics are as follows:

-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 produces three basic types of fuse cutouts.

                                   LN

  (A) Normal insulation fuse cutouts with porcelain insulators (type LN)

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(kgr): 10,0

 

                                LH

  (B) Heavy insulation fuse cutouts with porcelain insulators (type LH)

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(kgr): 10,5

 

                                   LSH

  (C) Heavy insulation fuse cutouts with synthetic insulators (type LSH)

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(kgr): 10,0 

 

Type test reports

 Our products have sucessfully been type tested and have been awarded the relevant type test certificates.

Type test certificate Type test certificate Type test certificate Type test certificate

 pdf logo Click here for product brochure 

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BETA type fuse disconnecting switches PDF 

BETA

  Single Pole, medium voltage 20/24kV, BETA AF 24 type, fuse disconnecting switches, operated using an insulating hook-stick, for vertical installation that have outdoor type 10A or 3,15A fuses.

Description.

  The Fuse Disconnecting Switches are suitable for vertical or 30° angle under hung operation.

  All materials and fabrication conform to the latest applicable European Standards (IEC) and Americal Standards (IEEE, USA, ASTM, NEMA).

  The base of the Fuse Disconnecting Switch is made of formed hot dip galvanized steel sheet.

  The two porcelain (TR-7 type) insulators are fixed on the base.

  One insulator has a fixed contact made of tin plated electrolytic copper equipped with the fuse link locking mechanism. The other insulator has a rotating fuse link base made of tin plated brass.

 The fuse links are equipped with striker and automatic disconnecting mechanism that operates when a fuse is blown. he fuse link can be operated using an insulating rod.

  All the necessary materials for the mounting of the Fuse Disconnecting Switch are provided (mounting screws).

  The Fuse Disconnecting Switches are provided with brown colored porcelain insulators (type TR-7).

  The steel base of the Fuse Disconnecting Switch is hot dip galvanized steel in accordance with ASTM Standards - Specification A153-65. The clips and terminals are silver plated.

Electrical Characteristics

Rated Voltage: 20kV

Maximum Operating Voltage: 24kV

Withstand without flashover of other electrical failure:
•    Power Frequency withstand (dry): 70kV /1 min
•    Power Frequency withstand (wet): 60kV /10sec
•    Full wave impulse withstand (positive and negative) 1,5/40usec: 150kV

Fuse Links ratings
•    Current Rating: 10Aor3,15A
•    Rated Voltage: 20KV
•    Interrupting Current Rating: 10KA

Rated temperature rise which the Fuse Disconnecting Switch shall not exceed under normal operation: 35°C

Net weight of assembled Single Phase Fuse Disconnecting Switch: 27kg

Ambient Temperature: max40°C, min -15°C Altitude: max 1000m above sea level

pdf logo Click here for product brochure

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