LEGRAND DMX3 Mode D'emploi page 84

DMX
17.1 Shunt trip (ST)
Shunt trip allows to open the breaker with an electri-
cal 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
it works also with a continuous one .
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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 those cases
the second shunt trip can be placed instead of the
UVR device .