◦ Inputs for external trip signal and external reset signal (non-congurable◦
inputs).
◦ 2 congurable digital inputs.◦
(For the order options of the WIC1, see ╚═▷ “2.6.1 Order Form of the Device”.)
Additional Power Supply
The WIC1 does not require any aux. voltage supply, consequently it can also be used for
switchboards without auxiliary power supply. It takes its power supply energy from the CT
circuits and provides the tripping pulse energy to the circuit breaker.
However, the WIC1‑4 variant with the “Dual Power” order option allows for connecting an
additional external power supply.
The dual power source makes the relay independent of the supply via the CTs, so that it can
also operate in case of very small phase currents or after a protection trip. The dual-power
will make the relay n-1 secure, because the electrical power that the relay requires for
operation is taken either from the dual power source or from the CTs.
The permissible voltages for the optional auxiliary supply can be found in ╚═▷ “9.1 Technical
Data – WIC1”.
Digital Inputs
The WIC1‑4 is provided with 2 grouped digital inputs.
For some device variants, the assignment of the digital inputs is xed to “external reset” and
“external trip”.
For the other device variants, the assignment is set to “external reset” and “external trip” by
default, but can be changed as descibed in ╚═▷ “3.8.2 Conguration of the Digital Inputs”.
• „External trip“ — By default, an external trip signal triggers the protection•
function »ExP[1]«, see ╚═▷ “4.11 ExP – External Protection”. Depending on its
conguration, »ExP[x]« issues either an alarm message or trips the circuit breaker
(via the impulse output, ╚═▷ “Impulse Output for a Trip Coil”).
• „External reset“ — An external input signal resets several latched states, see the•
table in ╚═▷ “2.11 Reset”.
• The settings related to the congurable digital inputs are described here: ╚═▷ “3.8.2•
Conguration of the Digital Inputs”
WARNING!
It is not permitted to feed any long-term or continuous voltage into the Digital Inputs.
In other words, it is strongly discouraged to try to supply the WIC1 (for a considerable
time) via the Digital Inputs.
If this is ignored the Digital Input can be overloaded, and this can lead to a permanent
damage of the WIC1.
85WIC1WIC1-1.0-EN-MAN
3 Hardware
3.6 Additional Power Supply and Digital Inputs (WIC1‑4… only)
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