Siemens SENTRON 3VA1, Руководство пользователя

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Accessories
4.8 Residual current devices
3VA molded case circuit breakers with IEC certificate
458
Manual, 03/2019, A5E03603177010-03
Button for setting the delay time Δt
The delay time can be set in ten steps, ranging from 0 (instantaneous) to a maximum value
of 10000 ms.
Each delay time has a dedicated setting range. The corresponding delay time is set as soon
as the button is latched in the setting range.
If the white setting arrow is resting between two setting ranges, the residual current device
trips instantaneously in response to residual currents.
The factory setting for the delay time is 0 ms.
Possible procedure for setting the response current and the delay time
1.
Switch off the molded case circuit breaker.
2. Open the transparent protective cover over the setting buttons.
3. Adjust the setting values for response current and delay time on the residual current
device to the maximum value in each case.
4. Switch on the molded case circuit breaker.
The LED labeled "ACT" on the residual current device now lights up, the residual current
device is ready.
5. Reduce the setting for the response current until the LED labeled "AL1" lights up.
The residual current is now 30% higher than the response current setting.
6. By turning the setting button clockwise, set the next higher response current.
The LED "AL1" goes out, the correct response current is now set.
7. Set the required delay time.
8. Close the transparent protective cover over the setting buttons.
The device is now fully parameterized.