Medium Voltage Single-Pole and Three-Pole Disconnectors (20/24kV) rated current 1.250A. Suitable for outdoor use, with vertical break operation, manually operated, used in Medium Voltage distribution networks.
Typically installed at the ends of the circuit breakers in 150kV / 20kV substations, in 20kV capacitor banks, grounding resistors, or Overhead Distribution Networks.
Designed to withstand the most adverse environmental conditions and high levels of pollution. The insulators are made of high-quality porcelain. The disconnector contacts, terminals, and moving contact are made of tin-plated copper.
The contacts are self-cleaning and always maintain stable pressure. In a closed position, the Disconnectors can withstand forces from earthquakes, wind, etc., without opening. All screws, nuts, washers, etc., are made of galvanized steel to ensure the longevity and proper operation of the Disconnectors.
Single-pole Disconnectors are operated using an insulating rod, while Three-pole Disconnectors through a metal handle. They can be installed vertically of at 300 angles from the vertical.
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Ambient Temperature |
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-25ο C to +45ο C |
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Max. Altitude |
|
1.000 m |
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Relative Humidity |
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≤ 95 % |
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Max. Ice Coating |
|
10 mm |
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Atmospheric Pollution Level |
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Moderate to Heavy |
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Wind Speed |
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150 km/h |
The Single and Three Pole Disconnectors are designed to comply to the same operating conditions.
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Single Pole |
Three Pole |
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Nominal Voltage |
20 kV |
|
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Max. Operating Voltage |
24 kV |
|
|
Frequency |
50 Hz |
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Nominal Current |
1.250 A |
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Short-Circuit Current Level |
10 kA (rms) / 25 kA (peak) |
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Short-Circuit Duration |
3 sec |
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Insulation Strength |
24 / 50 (60) / 125 (165) kV |
|
|
Mechanical Strength |
1.000 operations |
|
|
Contract No. |
Year |
Pieces |
|
2830031 |
1993 |
290 |
|
2830021 |
1994 |
35 |
|
2870042 |
1995 |
100 |
|
2860052 |
1997 |
7 |
|
2880012 |
1999 |
18 |
|
2890022 |
1999 |
51 |
|
Total |
501 |
|