Accessories
4.8 Residual current devices
3VA molded case circuit breakers with IEC certificate
Manual, 03/2019, A5E03603177010-03
403
Button for setting the response current I
Δn
The response current can be set in eight steps, ranging from 0.03 A to maximum 5 A. Each
response current has a dedicated setting range. The corresponding response current 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 is
automatically set to 0.03 A for safety reasons.
If the response current is set to 0.03 A, the delay time setting
Δt is deactivated and the
breaker is tripped instantaneously. in order to afford personal protection in the case of direct
contact.
Note
In order to protect personnel, it is necessary to seal the transparent protective cover so that
the 30 mA setting range cannot be changed.
The factory setting for the response current is 0.03 A.
Button for setting the delay time Δt (RCD510 only)
The delay time on RCD510 units can be set in eight steps, ranging from 0 (instantaneous) to
a maximum value of 3000 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.
The delay time is not adjustable on the RCD310. The RCD310 always trips instantaneously.
Possible procedure for setting the response current and the delay time
1.
Switch off the molded case circuit breaker/switch disconnector.
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/switch disconnector.
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 "AL" 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 "AL" 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.
