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MICROENER M-LIB3 Operation Instructions Manual

Digital low impedance differential protection relay
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6
M-LID3
M-LIB3
DIGITAL
LOW IMPEDANCE
DIFFERENTIAL
PROTECTION RELAY
TYPE
M-LID3
dA>
PROG/
I.R.F.
MICROELETTRICA
SCIENTIFICA
MILANO
ITALY
MODE SELECT
LOW IMPEDANCE
BIASED DIFFERENTIAL
RELAY TYPE
M-LID3
ENTER/RESET
dB>
dC>
dsv
BLOCK
REMOTE
TIME
INPUT
TRIGGER
SYNC.
+
-
PROG.
Doc. N° MO-0082-ING
Rev.
1
Pag.
21 of 35
Copyright 2010 - Microener

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Summary of Contents for MICROENER M-LIB3

  • Page 1 21 of 35 M-LID3 DIGITAL LOW IMPEDANCE DIFFERENTIAL PROTECTION RELAY TYPE M-LID3 dA> dB> dC> BLOCK PROG/ REMOTE TIME I.R.F. INPUT TRIGGER SYNC. MICROELETTRICA SCIENTIFICA MILANO ITALY MODE SELECT LOW IMPEDANCE BIASED DIFFERENTIAL RELAY TYPE PROG. M-LID3 ENTER/RESET Copyright 2010 - Microener...

  • Page 2: General Characteristic

    The zone Biased Differential Current element which compares the actual differential current with the  actual trip level “I ” calculated in function of the zone through current I and the bias coefficient R ] + R  I operation when Id> ([I Copyright 2010 - Microener...
  • Page 3 ] : 1R = (0.4-1)pU  Action starting point of 1R : 1I = (0.5-2)In  Per Unit bias coefficient in the area I >[I : 2R =(0.4-1)pU  Action starting point of 2R : 2I = (3-8)In  Copyright 2010 - Microener...
  • Page 4 [1I ] [2I ]  < [1I  ] < I < [2I + 1R(I -[1I  > [2I + 1R([2I ]-[1I ]) + 2R(I -[2I  BIAS SATURATION : I = 10 In for any I Copyright 2010 - Microener...
  • Page 5 If not tripped, this button altered. restores the default display. Copyright 2010 - Microener...
  • Page 6 From ON to OFF, by "ENTER/RESET" push button only if the tripping cause has disappeared.  In case of auxiliary power supply failure the status of the leds is recorded and reproduced when power supply is restored. Copyright 2010 - Microener...

  • Page 7: Output Relays

    Three inputs active when the relevant terminals are shorted are provided: terminals 1 - 2 : For time synchronization  terminals 1 - 3 : For trip lock-out  terminals 1 - 14 : External trigger for oscillography records  Copyright 2010 - Microener...
  • Page 8 - the validation of the programmed setting - the actuation of test programs - the reset of the default display indication - the reset of signal Leds.  e) - Indirect key : Enables access to the programming. Copyright 2010 - Microener...
  • Page 9 The memory is non-volatile and can be cancelled only with a secret procedure. Display Description dA> xxxx Differential element phase A dB> xxxx Differential element phase B dC> xxxx Differential element phase C Isv xxxx C.Ts. Circuit Supervision Copyright 2010 - Microener...
  • Page 10 Is – Isv (via digital input B3) 5-10-15 Tsyn Dis m Synchronization time internal 30-60-Dis NodAd 1 Identification number for connection on serial communication bus 1 - 250 The setting Dis indicates that the function is disactivated. Copyright 2010 - Microener...
  • Page 11 Doc. N° MO-0082-ING M-LIB3 Rev. Pag. 31 of 35 Copyright 2010 - Microener...
  • Page 12 -2-- Un-biased differential element operates relay R2, R3, R4 as programmed --3- Time delayed CT supervision element operates relay R2, R3, R4 as programmed Reset of output relays after tripping is: FRes: Aut. Aut. = Automatic Man. = Manually key Enter /Reset or via serial bus Copyright 2010 - Microener...

  • Page 13: Maintenance

    If the error message displayed is “E2P Err”, try to program any parameter and then run “W/OTRIP”.  If message disappear please check all the parameters.  If message remains send the relay to Microelettrica Scientifica (or its local dealer) for repair.  Copyright 2010 - Microener...

  • Page 14: Clock And Calendar

    During power on, time tolerance depends on the on board crystal (+/-50ppm typ, +/-100ppm max. over full temperature range). During power off, time tolerance depends on the RTC’s oscillator (+65 –270 ppm max over full temperature range). Copyright 2010 - Microener...
  • Page 15 Doc. N° MO-0082-ING M-LIB3 Rev. Pag. 35 of 35 6.19 WIRNG DIAGRAM M-LID3 (SCE1579) Copyright 2010 - Microener...

  • Page 16: Electrical Characteristics

    Tel. (##39) 02 575731 - Fax (##39) 02 57510940 - Telex 351265 MIELIT I http://www.microelettrica.com e-mail : ute@microelettrica.com The performances and the characteristics reported in this manual are not binding and can modified at any moment without notice Copyright 2010 - Microener...

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