119
DMX
3
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.
CCSTUVR
D1
D2
--
C1
C2
C3
C4
-
-
2° ST 1° ST
2° ST 1° ST
if necessary
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