Medium Voltage Disconnectors (20/24 kV), rated current 630 A, available in single-pole and three-pole configurations.
Suitable for outdoor installation, manually operated with vertical break operation, commonly installed in Overhead Distribution Networks. Manufactured with porcelain or synthetic insulators.
The Disconnectors are produced by Stalco S.A. according to International Standards IEC 62271-102 and IEC 60694 (IEC 62271-1) and the technical specifications of HEDNO:
|
|
Single Pole |
|
Three Pole |
Porcelain |
|
TD-309/30.08.06 |
|
TD-310/30.08.06 |
|
|
|
|
|
Synthetic |
|
TD-311/05.09.06 |
|
TD-312/05.09.06 |
The Disconnectors have been successfully installed in the Medium Voltage network for 30 years.
Designed to withstand the most adverse environmental conditions and high levels of pollution. The insulators are made of high-quality porcelain or synthetic materials. 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 both can be installed vertically or at 300 angles from the vertical.
Ambient Temperature |
-250C to +450C |
Max. Operating Altitude |
1.000 m |
Relative Humidity |
≤95 % |
Max. Ice Coating |
10 mm |
Atmospheric Pollution Level |
Moderate to Heavy |
Wind Speed |
150 km/h |
The Single and Three Pole Disconnectors are designed to comply to the same operating conditions.
|
|
Single Pole |
|
Three Pole |
Nominal Voltage |
|
20 kV |
||
Max. Operating Voltage |
|
24 kV |
||
Frequency |
|
50 Hz |
||
Nominal Current |
|
630 A
|
||
Short-Circuit Current Level |
|
10 kA (rms) / 25 kA (peak) |
||
Short-Circuit Duration |
|
3 sec |
||
Insulation Strength |
|
24 / 50 (60) / 125 (165) kV |
||
Mechanical Strength |
|
1.000 operations |
||
Insulator |
|
Porcelain or Composite |
Contract No. |
Year |
Pieces |
5800011 |
1990 |
1.158 |
2830031 |
1993 |
445 |
2830021 |
1994 |
438 |
2870042 |
1995 |
468 |
2860052 |
1997 |
323 |
2880012 |
1999 |
279 |
2890022 |
1999 |
179 |
4083062 |
2003 |
156 |
7132112 |
2004 |
35 |
4084022 |
2005 |
499 |
IPTO |
2013 |
200 |
6300003509 |
2020 |
114 |
5030081 |
2021 |
7.305 |
6300004983 |
2023 |
90 |
5032031 |
2023 |
2.000 |
Total |
13.689 |
Single Pole |
|
331004560 |
Three Pole |
|
331009090 |