Siemens Reyrolle 7SR45 Argus Device Manual page 42

Functions
3.2 Instantaneous Overcurrent Protection (50)
Logic of the Function (50-n)
[lo_7sr45_InstantaneousOvercurrentFn, 1, en_US]
Figure 3-1
Application and Settings Notes
Gn 50-n Element
Default setting: Disabled
This setting is used to allow the element to be switched on and off based on the user requirement. A separate
setting is provided for each element. The settings of the individual element can be configured independently
of each other.
Parameter State
Disabled
Enabled
Gn 50-n Setting
Default setting = 1.0 ⋅ I
This setting defines the operating current threshold of the element. The applied phase current must exceed
this setting by a factor of 1.00x for pickup of the element. The operation time will then be dependent on the
selected delay for the element setting. The element pickup will reset when the current is reduced under the
following conditions:
•
0.2 ⋅ I to 0.9 ⋅ I
rated
•
1.0 ⋅ I to 20.0 ⋅ I
rated
42
Logic Diagram of the Instantaneous Overcurrent Protection (50)
Description
The element is inactive
The element is active
rated
is ≥ 90 % I
rated op
is ≥ 94 % I
rated op
Reyrolle, 7SR45, Device Manual
C53000-G7040-C101-2, Edition 09.2020