Siemens Reyrolle 7SR45 Argus Device Manual page 47

able if more are required. A 51 element can provide a DTL operate and DTL reset characteristic if that is
required.
Set the characteristic to suit your application.
Gn 51-n Time Mult (if Gn 51-n Char is set as IEC/ANSI)
Default Setting: 1.00
This setting defines the time multiplier that is applied to the selected current curve. For IEC curves, this value is
traditionally in the range of 0.01 to 10 and for ANSI curves, a value of 0.01 to 10 is typically applied.
Gn 51-n Delay (if Gn 51-n Char is set as DTL)
Default setting: 5.00 s
This should be set to suit the individual application. If any other characteristic curve is selected, this setting is
not used.
Gn 51-n MinOperate
Default setting: 0.00 s
With this parameter, a minimum operate delay time can be selected. The operate delay time of the
inverse‑time characteristic curve never falls below the minimum operate delay time.
[dw_7SR45_minimumoperatingtimecurve, 1, en_US]
Figure 3-3
This is traditionally used with recloser systems only and otherwise is recommended to be left at the default
setting of 0 s.
Gn 51-n Follower
Default setting: 0.00 s
This setting allows an additional time to be added to that achieved by the selected characteristic curve. It is
applied as a DTL time after the operate state from the curve is achieved. With this setting, the whole curve is
shifted linearly on the time axis by this additional definite time.
This is traditionally used with recloser systems only and otherwise is recommended to be left at the default
setting of 0 s.
Gn 51-n Reset
Default setting: 00 s
Reyrolle, 7SR45, Device Manual
C53000-G7040-C101-2, Edition 09.2020
Minimum Operating Time of the Curve
3.3 Time-Delayed Overcurrent Protection (51)
Functions
47