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4.3
Setpoints page 3: NOT AVAILABLE
SETPOINTS PAGE 3
NOT AVAILABLE
END OF PAGE
4.4
Setpoints page 4: Gnd. PROTECTIONS
SETPOINTS PAGE 4
Gnd. PROTECTIONS
GROUND TIMED O/C
RELAY: – – – –
GROUND TIMED O/C
PICKUP: 12% CT
If
"GROUND TIMED O/C RELAY"
≠
– – – –
GROUND O/C CURVE
ANSI MOD INV
If
"GROUND TIMED O/C RELAY"
≠
– – – –
GROUND TIMED O/C
DELAY: 1.0 Sec
Gnd. O/C CURVE
MULTIPLIER: 1.0
The next 3 lines are displayed only if CIRCUIT BREAKER has been selected in line BREAKER TYPE of SETPOINT SYSTEM
SETUP.
GROUND INST. O/C
RELAY: – – – –
CURRENT PROTECTION RELAY - IPR-D
This page is free: it is not used for IPR-D
Last LINE of PAGE 3.
Press LINE or ▲PAGE, to pass to the first line of PAGE 4.
This PAGE allows setting the ground current protections.
Select the outputs to be activated by the ground timed overcurrent protection (ANSI 51
N/G).
• If "
– – – –
" is selected, the two following lines displayed when pressing LINE key are
GROUND INST. O/C RELAY and GROUND O/C ALARM RELAY.
REMARK: The procedure for selection is described at page 4.2
RANGE:
..................................................................................................
STEPS:
..................................................................................................................
Enter the ground overcurrent pickup level. This level determines the current level at
which the relay will start counting the circuit breaker/disconnector trip time according to
the protection curve selected in the following line: GROUND O/C CURVE.
RANGE:
DEFINITE TIME; ANSI MOD INV; ANSI NORMAL INV;
..........................
ANSI VERY INV; ANSI EXTREM INV; IAC SHORT
TIME; IAC INVERSE; IAC VERY INV; IAC EXTREM
INV; IEC SHORT TIME; IEC-A NORMAL INV; IEC-B
VERY INV; IEC-C EXTREM INV
Enter the ground overcurrent protection curve shape required:
• If DEFINITE TIME is selected, the two following lines displayed when pressing LINE
key are: GROUND TIMED O/C DELAY and Gnd. O/C CURVE MULTIPLIER.
RANGE:
....................................................................................................
STEPS:
..............................................................................................
Enter the ground alarm delay. The related output will activate if the current rating is
superior to "GROUND TIMED O/C PICKUP" for a longer time than the set one.
This line is displayed only if:
• Ground Timed O/C Relay ≠ "
RANGE:
...........................................................................................................
STEPS:
.........................................................................................................................
Set the ground overcurrent multiplier to select the curve required.
This line is displayed only if:
• Ground Timed O/C Relay ≠ "
Select the outputs to be activated by the ground instantaneous overcurrent protection
(ANSI 51N). Select "– – – –" for disabling the protection.
REMARK: The procedure for selection is described at page 4.2
4.4
Chapter 4: "SETPOINTS" Menu
– – – –"
and Ground O/C Curve = DEFINITE TIME
– – – –"
and Ground O/C Curve ≠ DEFINITE TIME
Manual P/N: IPR-D GBM 01/09/2006
4% ÷ 300% CT
1% CT
0.05 s ÷ 600 s
0.01 s / 0.1 s / 1 s
0.1 ÷ 20.0
0.1
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