Accessories
4.8 Residual current devices
3VA molded case circuit breakers with IEC certificate
Manual, 03/2019, A5E03603177010-03
457
The residual current device and the "tripped" display are reset by means of the handle of the
molded case circuit breaker, or the handle of the manual operator or by means of the motor
operator.
Parameterization of the residual current device
Setting button for response current I
Δn
Setting button for delay time Δt
Button for setting the response current I
Δn
The response current can be set in ten steps, ranging from 0.03 A to maximum 30 A. A
residual current of type A is detected within the 0.03 A to 10 A range. If the response current
is set to 30 A, the device detects only residual currents of type AC (i.e. purely sinusoidal
currents).
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 is deactivated and the breaker
is tripped instantaneously. in order to afford personal protection in the case of direct contact.
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.
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