Seg WIC1 User Manual

2.3 Supply of a WIC1
If a WIC1 is being operated in a typical application it is supplied via the CTs, and this is surely
the normal case after commissioning.
But for the case of completeness, we want to list all ways to supply a WIC1:
Permanent Supply:
• Supply via the phase CTs, under the condition that these have been selected•
correctly (╚═▷ “3.3.2 Selection of a WIC1-Compatible Current Transformer”) and
there is su󰊡cient phase current 󰊠owing (╚═▷ “9.1.6 Power Supply”).
• Only WIC1‑4: Supply via an external auxiliary voltage (╚═▷ “9.1.6 Power Supply”).•
This is optional and independent of the supply via CTs. It enables the WIC1‑4
to stay in operation after a protection trip, and only this allows for using some
special functions, such as the Circuit Breaker Failure protection (╚═▷ “4.12 CBF –
Circuit Breaker Failure [50BF, 62BF]”). Another example, that would be technically
impossible without an additional external supply, is connecting an external output
relay to be used as a self-supervision contact (╚═▷ “3.7.1 Self-Supervision Contact
for the WIC1‑4”).
Temporary Supply:
• Supply via the USB interface of a connected DiggiMEC (╚═▷ Chapter 2.2). This makes•
sense during commissioning and is independent of the supply via CTs (and of the
external WIC1‑4 supply).
◦
Connecting a PC to the USB interface: This also enables the use of Smart view,
◦
see ╚═▷ Chapter 2.2.
◦ Connecting a powerbank to the USB interface: Whether this is possible or◦
not depends on the type of powerbank. See “Troubleshooting: Supply via
Powerbank is not possible”.
Note, however, that the USB supply is not designed as a permanent supply (but only
for a DiggiMEC / Smart view connection). Furthermore, a supply only via USB is not
su󰊡cient to enable a trip pulse (“Troubleshooting: System-LED is O󰊞”), and therefore
also the green System/Ready LED stays o󰊞 (╚═▷ “The »System« LED(s) – “Ready”,
“Error””).
Moreover, you should note that a DiggiMEC without a connected WIC1 is never
operational, even with USB supply.
• For a short time (let us say: for a typical signal duration), the voltage of an external•
signal, that is applied at the Digital Input of the WIC1, can also boot up the WIC1,
and this might under some circumstances be required for an external trip (╚═▷ “4.11
ExP – External Protection”).
22 WIC1 WIC1-1.0-EN-MAN
2 WIC1 – Introduction and General Information
2.3 Supply of a WIC1

Seg WIC1 Specifications

General

Brand	Seg
Model	WIC1
Category	Relays
Language	English