Cooper Lighting Low Impedance Bus Differential Relay M-LIB3 - Manual (Page 29)

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6.13 READING OF MEASUREMENTS AND RECORDED PARAMETERS
Enter the MODE "MEASURE", SELECT the menus "ACT.MEAS"-"MAX VAL"-"LASTTRIP"-
"TRIP NUM", scroll available information by key "+" or "-" .
6.13.1 ACT.MEAS
Actual values as measured during the normal operation. The values displayed are continuously updated.
Display Description
xxxxxxx Current date in the DDMMMYY format.
xx:xx:xx Current time in the HH:MM:SS format.
dAxx.xxn R.M.S. value of differential current of phase A : (0-99.99) per unit of rated phase input current
dBxx.xxn As above phase B
dCxx.xxn As above phase C
IR xx.xn
Through current (0-99.9) per unit of the rated input current
IS xx.xn Actual calculated differential trip level
6.13.2 MAX VAL
Highest values recorded from Breaker closing, (updated any time the breaker closes).
Display Description
dAxx.xxn Differential current of phase A : (0-99.99) per unit of rated phase input current
dBxx.xxn As above phase B
dCxx.xxn As above phase C
IR xx.xn
Through current (0-99.9) per unit of the rated input current
6.13.3 LASTTRIP
Display of the function which caused the tripping of the relay plus values of the parameters at the
moment of tripping. The memory buffer is refreshed at each new relay tripping.
Display Description
LastTr-x Indication of the recorded event (x= 0 to 4)
Example: Last event (LastTr -0)
Last but one event (LastTr-1) etc...
xxxxxxx Current date in the DDMMMYY format.
xx:xx:xx Current time in the HH:MM:SS format.
Cau:xxxx Function which produced the event being displayed: dA>, dB>, dC>, Isv
dAxx.xxn Differential current phase A
dBxx.xxn Differential current phase B
dCxx.xxn Differential current phase C
IR xx.xn
Through current (0-99.9) per unit of the rated input current
6.13.4 TRIP NUM
Counters of the number of operations for each of the relay’s function.
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