Pulse Output - Siemens Reyrolle 7SR45 Argus Device Manual

2.4

Pulse Output

The pulse output is used to interface directly with the low energy circuit-breaker trip coil. The pulse output
provides 24 V, 0.1 Ws pulses of 50 ms on and 500 ms off.
The pulse output operates when any configured protection function trips. The trip energy for the trip coil is
stored in a capacitor built into the protection device. The capacitors are charged with the auxiliary power
supply/phase current. The pulses are repeated until the fault current falls below the set value. The pulse
output does not require any mapping with protection functions.
In the presence of auxiliary power supply/phase current, the pulse output operates when it is mapped to a
binary input. When the assigned binary input is triggered, the pulse output operates, local flag operates, and
Trip LED flashes. The pulse output operates until the auxiliary power supply/phase current is available.
NOTE
i
i
The time between 2 pulses depends on the impedance of the trip coil and magnitude of the current (if the
relay is powered via phase currents).
When there is no load connected at the output of pulse output (no trip coil is connected), the pulse on
duration varies from 50 ms to 70 ms.
The pulse output cannot be triggered via rear/font communication protocols, Siemens recommends using
binary inputs for triggering the pulse output for remote trip applications.
Reyrolle, 7SR45, Device Manual
C53000-G7040-C101-2, Edition 09.2020
Device Functionality

2.4 Pulse Output

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