Insulect Disconnectors and Earthing Switches
Disconnectors and Earthing Switches 12kV to 145kV
The Disconnector range from our brand partner, Insulect, is designed to accommodate each customer’s needs and the layout of each substation. The disconnector range is based on a rotary double break design, with or without integrated Earthing Switch. Disconnectors are built for either manual operation or with a motor operated mechanism, for local or remote operation. Disconnectors are designed for horizontal or vertical applications, and may be mounted on steel structures or pole mounted.
The disconnectors can be customised to suit specific substation layouts, configurations and structure types. A variety of insulator types can be accommodated for each voltage level, including electrical and mechanical ratings and pollution levels.
All contact surfaces are silver plated copper. Copper components other than the contact surfaces are tin plated as standard. The moving blades are supplied with a spring loaded flicker to quickly extinguish residual current arcing when the switch is opened live.
Independent single or double earthing switches can be supplied with the disconnectors.
Rating, according to IEC 60694
Rated Voltage (kV rms) | Rated Lightning Impulse Withstand Voltage kV (peak) | Rated 1 Min Power Frequency Withstand Voltage kV (rms) | ||
To Earth and between Poles (Common Value) | Across the insulating distance | To Earth and between Poles (Common Value) | Across the insulating distance | |
12 | 75 | 85 | 28 | 32 |
24 | 125 | 145 | 50 | 60 |
36 | 170 | 195 | 70 | 80 |
72.5 | 325 | 375 | 140 | 160 |
145 | 650 | 750 | 275 | 315 |
Normal/Short Circuit Current Rating, according to AS62271-102 / IEC62271-102
Rated Voltage (kV rms) | Current Rating Continuous (A) | Short Circuit Withstand Current and Duration (A/sec) | LIWV (kVp) BIL |
12 / 24 | 600 – 2500 | Up to 31.5 kA/3sec | 125 kV |
36 | 600 – 3500 | Up to 31.5 kA/3sec | 170 kV |
72.5 | 600 – 2500 | Up to 40.0 kA/3sec | 325 kV |
145 | 600 – 2500 | Up to 50.0 kA/3sec | 650 kV |
Associated Earth Switch Ratings
Voltage | Short Circuit Withstand Current | LIWV |
12 / 24 | Up to 31.5 kA/3sec | 125 kV |
36 | Up to 31.5 kA/3sec | 170 kV |
72.5 | Up to 31.5 kA/3sec | 325 kV |
145 | Up to 50.0 kA/1sec | 650 kV |
Mechanical Endurance Class
AKPS Disconnectors are built and tested to M1 class mechanical endurance suitable for operating cycles of 2000 operations, as per AS 62271.102-2005 & AS 2650-2005.
Other literature available on request
Reports, drawings, technical data sheets, installation instructions, O&M guidelines
