| Type | Rated 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) |
| RW4-12/100 | 10 | 12 | 100 | 6.3 | 42 | 30 | 75 | 260 | 5.4 |
| RW4-12/200 | 10 | 12 | 200 | 8 | 42 | 30 | 75 | 260 | 5.6 |
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.
