Change-over switches STU / STP
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The STU / STP change-over switches are devices to be used in stationary applications where they switch over between circuits currently not loaded. They have their states signalled on the front panel. To make them safe and protected against inadvertent action, the instruments are fitted with locks able to arrest them in a position and prevent manual handling.
Scheme of the possible positions of the power contacts of the change-over switches STU / STP
Technical data
| Number of poles |
1 / 2 | ||||
|
Rated voltage |
1500V |
3000V | |||
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Insulation voltage |
2300V |
4800V | |||
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Impulse withstand voltage |
12kV |
30kV | |||
|
Short-time withstand AC voltage |
6kV |
14kV | |||
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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 |
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Short-circuit time |
1s | ||||
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Mechanical rigidity |
20 000 cycles | ||||
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Ambient temperature |
-25° - + 45°C | ||||
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Driving motor |
24 - 220VDC / 230VAC / 3 x 400VAC | ||||
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Number of auxiliary contacts |
0 / 2 / 4 / 6 / 8 | ||||
