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Drop-out Fuse Cutout-RW4

    The RW4-12kv drop-out fuse cutout is another specific type of fuse cutout used in high-voltage electrical systems. 

  • Product Details
TypeRated voltage
(kV)
Maximum operating voltage
(kV)
Rated current
(A)
Breaking current
(kA)
Power frequency dry withstand voltage
(kV)
Power frequency wet withstand voltage
(kV)
Impulse voltage
(kV)
Creepage distance
(mm)
Weight
(kg)
RW4-12/10010121006.34230752605.4
RW4-12/200101220084230752605.6


1.Purpose and Function:

  1)The RW4-12kv cutout serves as an outdoor high-voltage protection device.

  2)It is typically installed on the high-voltage side of distribution transformers or on branch and trunk lines of the distribution network.

  3)Its primary functions include short-circuit protection, overload protection, and circuit disconnection during faults.

2.Components and Structure:

  1)The drop-out fuse consists of two main parts:

    (1)Insulating Bracket: Holds the static contacts at both ends.

    (2)Fuse Tube: Contains the dynamic contacts and the fuse element.

  2)The fuse tube itself comprises:

    (1)Inner Layer: An arc extinction tube.

    (2)Outer Layer: Either phenolphthalein paper or epoxy glass cloth.

  3)Key features:

    (1)Compact design.

    (2)Lightweight.

    (3)Simple installation.

    (4)Suitable for outdoor environments.

    (5)Can handle non-load current switching.

    (6)With an arc extinguishing chamber, it can also handle load current switching.

3.Specifications (RW4-12kv):

  1)Rated Voltage: 12 kV.

  2)Rated Current: 100/200 A.

  3)Rated Breaking Current: 6.3/8 kA.

  4)Power Frequency Withstand Voltage (1 minute): 42 kV (voltage to ground).

  5)Rated Lightning Impulse Withstand Voltage: 75 kV (voltage to ground).

  6)Creepage Distance (Standard Configuration): 260 mm. 

  7)Working Environment Conditions:

    (1)Max Temperature: +45ºC.

    (2)Min Temperature: -40ºC.

    (3)Max Daily Temperature Difference: 25K.

    (4)Relative Humidity: Daily mean ≤ 95%, monthly mean ≤ 90%.

    (5)Altitude: Not higher than 1000m.

    (6)Wind: Not exceeding 35m/s.

    (7)Radial Thickness of Ice: 10mm.

    (8)Earthquake Intensity: Not exceeding 8 degrees.

    (9)Installation site free of severe vibration and air pollution.

4.Applications:

  1)Used in 10kV power distribution lines.

  2)Installed on the primary side of power distribution transformers.

  3)Provides protection and switching operation for equipment.


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