Bticino Megabreak 2500, Installation Manual

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17.1 Shunt trip (ST)
Allows to open the breaker with an electrical signal. According to the features of the device, it’s always
possible to open the breaker (when closed). The shunt trip can work (depending on type) both on AC
and DC current.
This device can work with an instantaneous supply, but works also with a continuous one.
If always supplied, the device is like an electrical lock in open position.
Some applications need an high safety on the open command, and , particularly, the duplication
of the command circuit by a double shunt trip. In that cases the second shunt trip can be placed
instead of the UVR device.
CC ST UVR
D1
D2
- -
C1
C2
C3
C4
-
2° ST 1° ST -
2° ST 1° ST
if necessary