GRZ100
14
Voltage Transformer Failure Supervision
Undervoltage element (phase-to-phase)
Undervoltage element (phase-to-earth)
Current change detection element
Residual voltage element
Residual current element
50 to 100V in 1V steps
10 to 60V in 1V steps
0.1A fixed (1A relay)
0.5A fixed (5A relay)
20V fixed
Common use with earth fault detection element
Power Swing Blocking
Detection zone (PSBZS, PSBZG)
Current change detection element
Detection time
Resetting time
2.5 to 75.0
Ω
in 0.1
Ω
steps (1A relay)
0.50 to 15.00 in 0.01
Ω
steps (5A relay)
0.1 to 2.0A in 0.1A steps (1A relay)
0.5 to 10.0A in 0.1A steps (5A relay)
30 to 60ms in 1ms steps
500ms fixed
Out-of-step Protection
Resistive reach (OSTR1)
Resistive reach (OSTR2)
Resistive reach (OSTXF)
Resistive reach (OSTXF)
Detection time (TOST)
15 to 150
Ω
in 1
Ω
steps (1A relay)
3.0 to 30.0
Ω
in 0.1
Ω
steps (5A relay)
5 to 50
Ω
in 1
Ω
steps (1A relay)
1.0 to 10.0
Ω
in 0.1
Ω
steps (5A relay)
5 to 250
Ω
in 1
Ω
steps (1A relay)
1.0 to 50.0
Ω
in 0.1
Ω
steps (5A relay)
1 to 50
Ω
in 1
Ω
steps (1A relay)
0.2 to 10.0
Ω
in 0.1
Ω
steps (5A relay)
0.01 to 1.00s in 0.01s steps
Breaker Failure (BF) Protection
Overcurrent element
BF timer for retry-trip of failed breaker
BF timer for related breaker trip
Operating time of overcurrent element
Resetting time of overcurrent element
0.1 to 2.0A in 0.1A steps (1A relay)
0.5 to 10.0A in 0.1A steps (5A relay)
50 to 500ms in 1ms steps
50 to 500ms in 1ms steps
less than 20ms at 50Hz or less than 17ms at 60Hz
less than 15ms at 50Hz or less than 13ms at 60Hz
Inverse Time Overcurrent Protection
Overcurrent
Time multiplier
Characteristic
Accuracy of inverse time characteristics
Reset definite time
0.10 to 5.00A in 0.01A steps (1A relay)
0.5 to 25.0A in 0.1A steps (5A relay)
0.05 to 1.00 in 0.01 steps
Refer to Figure 8.
Standard, Very and Long-time: IEC60255-3 class 5
Extremely inverse: IEC60255-3 class 7.5
0.0 to 10.0s in 0.1s steps
Definite Time Overcurrent Protection
Overcurrent
Time for delayed trip
Operating time of overcurrent element
Accuracy of pick-up value
0.1 to 20.0A in 0.1A steps (1A relay)
0.5 to 100.0A in 0.1A steps (5A relay)
0.00 to 10.00s in 0.01s steps
less than 20ms
±
5%
Directional Earth Fault Protection
Characteristic angle
Polarising voltage (3V0)
Zero-sequence current (3I0)
Time for backup trip
Accuracy of pick-up value
0 to 90
°
in 1
°
steps (3I0 lags for
−
3V0)
1.7 to 21.0V in 0.1V steps
0.10 to 1.00A in 0.01A in 0.01A steps (1A relay)
0.5 to 5.0A in 0.1A steps (5A relay)
0.00 to 10.00s in 0.01s steps
±
5%
