Disconnectors STO
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The STO disconnectors are devices intended for stationary applications where they open circuits not passed by any currents. The instruments driven manually or using a motor unit, have their states signalled on the front panels. To make them safe and protected against inadvertent action, the STO disconnectors are fitted with locks able to arrest them in a position and prevent manual handling.
Technical data
| Number of poles |
1 / 2 | ||||
|
Rated voltage |
1500V |
3000V | |||
|
Insulation voltage |
2300V |
4800V | |||
|
Impulse withstand voltage |
12kV |
30kV | |||
|
Short-time withstand AC voltage |
6kV |
14kV | |||
|
Frequency |
0 - 60Hz | ||||
|
Rated current |
630A |
1250A |
2000A |
4000A |
6300A |
|
Short-time withstand current |
8kA |
16kA |
25kA |
50kA |
80kA |
|
Peak withstand current |
20kA |
40kA |
63kA |
125kA |
200kA |
|
Short-circuit time |
1s | ||||
|
Mechanical rigidity |
20 000 cycles | ||||
|
Ambient temperature |
-25° - + 45°C | ||||
|
Driving motor |
24 - 220VDC / 230VAC / 3 x 400VAC | ||||
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Number of auxiliary contacts |
0 / 2 / 4 / 6 / 8 | ||||
