User Guide
P12x/EN FT/A96
MiCOM P121/P122/P123
Page 11/72
I<
undercurrent element threshold
tI< PHASE
undercurrent fault time-out
BRKN COND.
broken conductor indication. I2/I1 ratio exceeded for a period
of time that is higher than tBC can be set under the
AUTOMAT. CTRL/Broken cond. menu.
t AUX 1
t AUX1 time-out
t AUX 2
t AUX2 time-out
CB FAIL
circuit breaker failure indication (the CB does not trip on tBF
time. tBF can be set under the AUTOMAT. CTRL/CB Fail
menu.
I2>
negative sequence current threshold (1
st
stage)
tI2>
negative sequence current threshold time-out (1
st
stage)
I2>>
negative sequence current threshold (2
nd
stage)
tI2>>
negative sequence current threshold time-out (2
nd
stage)
SPRING CHARGE FAIL
Faulty circuit breaker indication given by a logic input that
has been assigned (under the AUTOMAT. CTRL/Inputs
menu).
T operating CB
Operating (or tripping) time of the circuit breaker longer than
the value set in the AUTOMAT. CTRL/CB Supervision
menu.
CB OPEN NB
Number of circuit breaker operation higher that the value set
in the AUTOMAT. CTRL/CB Supervision menu.
Σ
Amps(n)
Total measured current broken by CB is higher than the
value set in AUTOMAT. CTRL/CB Supervision menu.
TRIP CIRCUIT
Circuit breaker trip circuit failure longer than the supervision
timer t SUP (that can be set under the AUTOMAT. CTRL/CB
Supervision menu.
LATCH RELAY
At least one output relay is latched.
LATCH RELAY TRIP
The relay trip is latched.
CB CLOSE FAILURE
Circuit breaker closing time longer than the value set in the
AUTOMAT. CTRL/CB Supervision menu.
RECLOSER SUCCESSFUL
Successful reclose signal. Indicates that when the fault has
been cleared upon circuit breaker reclosure, and has not re-
appeared before expiry of the reclaim time.
RECLOSER BLOCKED
Recloser blocking signal. Generated by:
- auxiliary power supply failure during dead time (definitive
trip).
-
external blocking signal. External blocking can be set
by the user in the
PROTECTION
G1
/
[79]
AUTORECLOSE/Ext Block menu. This blocking signal is
provided via a logic input assigned to the Block_79 function
in the AUTOMAT. CTRL/Inputs menu.
- definitive trip.
- remote trip command during the reclaim time.
- pick-up of I2> or thermal trip during dead time.
- breaker failure (circuit breaker failure to trip on expiry of
tBF).
- breaker operating time (or tripping time) longer than the set
time.
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...
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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 302: ...P12x EN AP A96 Application Guide Page 80 80 MiCOM P120 P121 P122 P123 BLANK PAGE...
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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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