User Guide
P12x/EN FT/A96
MiCOM P121/P122/P123
Page 49/72
5.9.4.3
P123 additional Blocking Logic menu
Block 1 t Aux 4
No
Enables/disables Blocking Logic of time delay of
auxiliary input Aux 4.
Setting choice: Yes, No.
5.9.5
Inrush Blocking Logic submenu (
P122 and P123 only
)
Through the Inrush Blocking Logic submenu, the user can set a 2
nd
harmonic blocking threshold
and block each delayed overcurrent threshold by setting .
MiCOM P122
&
P123
relays have the
submenu Inrush Blocking available for setting.
It is possible to enable or disable the “blocking” of most protection functions even if a logic
input has been assigned to that function. Blocking of a protection function can be prevented
if “No” is selected in the relevant window (see below). Blocking of a protection function can
be enabled if “Yes” is selected in the relevant window.
AUTOMAT. CTRL
Heading of the AUTOMAT. CTRL menu. Press
to
access the menu then
6 times.
Blocking Inrush
Heading of the Inrush Blocking logic submenu.
Press
to access the different submenus.
Blocking Inrush
Yes
Setting choice Yes: The crossing of the Harmonic H2
ratio threshold on any phase activates the Inrush
Blocking Logic function instantaneously.
Setting choice No: The crossing of the Harmonic H2 ratio
threshold doesn’t activate the Inrush Blocking logic
function.
Inr. Harmonic 2 Ratio =
20%
Set the value for the 2
nd
harmonic threshold ratio
calculated as a percentage of the fundamental
component. Press
to modify this value. The threshold
setting range is from 10 to 35%, in steps of 0.1%. Press
to validate your choice.
T Inrush reset =
0
ms
Set the value for the Inrush tReset time. This provides a
reset delay of the Inrush Blocking signal (logic state=1)
once the 2
nd
harmonic level falls below the set threshold.
The setting range is from 0.0s to 2 s. Use
to change
setting and press
to validate your choice.
Blocking Inrush I>
No
Enables/disables Inrush Blocking for the first overcurrent
threshold (I>)
Setting choice: Yes = Enables, No = Disables.
Blocking Inrush I>>
No
Enables/disables Inrush Blocking for the second
overcurrent threshold (I>>)
Setting choice: Yes = Enables, No = Disables.
Blocking Inrush I>>>
No
Enables/disables Inrush Blocking for the third
overcurrent threshold (I>>>).
Setting choice: Yes = Enables, No = Disables.
Blocking Inrush Ie>
No
Enables/disables Inrush Blocking for the first earth fault
overcurrent threshold (Ie>).
Setting choice: Yes = Enables, No = Disables.
Blocking Inrush Ie>>
No
Enables/disables Inrush Blocking for the second earth
fault overcurrent threshold (Ie>>).
Setting choice: Yes = Enables, No = Disables.
Blocking Inrush Ie>>>
No
Enables/disables Inrush Blocking for the third earth fault
overcurrent threshold (Ie>>>).
Setting choice: Yes = Enables, No = Disables.
Summary of Contents for MiCom P120
Page 1: ...MiCOM P120 P121 P122 P123 Overcurrent Relays Version 11 Technical Guide P12X EN T A96...
Page 2: ......
Page 4: ...P12x EN T A96 Technical Guide Contents Page 2 2 MiCOM P120 P121 P122 P123 BLANK PAGE...
Page 13: ...Introduction P12x EN IT A96 MiCOM P120 P121 P122 P123 INTRODUCTION...
Page 14: ......
Page 16: ...P12x EN IT A96 Introduction Page 2 8 MiCOM P120 P121 P122 P123 BLANK PAGE...
Page 22: ...P12x EN IT A96 Introduction Page 8 8 MiCOM P120 P121 P122 P123 BLANK PAGE...
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Page 35: ...User Guide P12x EN FT A96 MiCOM P120 P121 P122 P123 USER GUIDE...
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Page 40: ...P12x EN FT A96 User Guide Page 4 72 MiCOM P120 P121 P122 P123 BLANK PAGE...
Page 108: ...P12x EN FT A96 User Guide Page 72 72 MiCOM P120 P121 P122 P123 BLANK PAGE...
Page 109: ...Menu Content Tables P12x EN HI A96 MiCOM P120 P121 P122 P123 MENU CONTENT TABLES...
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Page 112: ...P12x EN HI A96 Menu Content Tables Page 2 68 MiCOM P120 P121 P122 P123 BLANK PAGE...
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Page 221: ...Application Guide P12x EN AP A96 MiCOM P120 P121 P122 P123 APPLICATION GUIDE...
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Page 370: ...P12x EN CT A96 Communications COURIER DATABASE Page 2 248 MiCOM P120 P121 P122 P123 BLANK PAGE...
Page 514: ...P12x EN CT A96 Communications COURIER DATABASE Page 146 248 MiCOM P120 P121 P122 P123...
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Page 518: ...P12x EN CT A96 Communications IIEC 60870 5 103 Page 2 248 MiCOM P120 P121 P122 P123 BLANK PAGE...
Page 536: ...P12x EN CT A96 Communications IEC 60870 5 103 Page 20 248 MiCOM P120 P121 P122 P123...
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Page 540: ...P12x EN CT A96 Communications DNP 3 0 Database Page 2 248 MiCOM P120 P121 P122 P123 BLANK PAGE...
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Page 573: ...Connection Diagrams P12x EN CO A96 MiCOM P120 P121 P122 P123 CONNECTION DIAGRAMS...
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Page 582: ...P12x EN RS A96 Commissioning Test Record Sheets Page 2 60 MiCOM P120 P121 P122 P123 BLANK PAGE...
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