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Description
A plausibility check function is provided for the three-phase current and three-phase voltage input which
performs the following:
Determination of the sum and phase sequence of the 3 phase currents or voltages
4 independent parameter sets
ABB 216VC62A REG216 generator protector accessory module
Table 32 Directional sensitive EF protection for ungrounded or compensated systems32N)
Determination of real or apparent power from neutral current and voltage
Settings:
Pick-up power SN 0.005 to 0.1 SN in steps of 0.001 SN
Reference value of the power SN 0.5 to 2.5 UN · IN in steps of 0.001 UN · IN
Characteristic angle -180° to +180° in steps of 0.01°
Phase error compensation of current input -5° to +5° in steps of 0.01°
Delay 0.05 to 60 s in steps of 0.01 s
Reset ratio 30 to 95% in steps of 1%
Accuracy of the pick-up setting ±10% of setting or 2% UN · IN (for protection CTs)
±3% of setting or 0.5% UN · IN (for measuring CTs)
Max. operating time without intentional delay 70 ms
The directional sensitive EF protection for ungrounded or compensated systems requires the BU03 type
with 3I + 1MT + 5U
Table 33 Three-phase current plausibility / Three-phase voltage plausibility (46/47)
A plausibility check function is provided for the three-phase current and three-phase voltage input which
performs the following:
Determination of the sum and phase sequence of the 3 phase currents or voltages
4 independent parameter sets
Accuracy of the pick-up setting at rated frequency ±2% IN in the range 0.2 to 1.2 IN
±2% UN in the range 0.2 to 1.2 UN
Reset ratio 90% whole range
>95% (at U > 0.1 UN or I > 0.1 IN)
Current plausibility settings:
Pick-up differential for sum of internal summation current 0.05 to 1.00 IN in steps of 0.05 IN
Amplitude compensation for summation CT -2.00 to +2.00 in steps of 0.01
Delay 0.1 to 60 s in steps of 0.1 s
Voltage plausibility settings:
Pick-up differential for sum of internal summation voltage 0.05 to 1.2 UN in steps of 0.05 UN
Amplitude compensation for summation VT -2.00 to +2.00 in steps of 0.01
Delay 0.1 to 60 s in steps of 0.1 s
Table 34 Directional sensitive earth fault protection for grounded systems (67N)
Detection of high-resistance earth faults
Current enabling setting 3I0
Direction determined on basis of neutral variables (derived externally or internally)
Permissive or blocking directional comparison scheme
Echo logic for weak infeeds
Logic for change of energy direction
4 independent parameter sets
Settings:
Current pick-up setting 0.1 to 1.0 IN in steps of 0.01 IN
Voltage pick-up setting 0.003 to 1 UN in steps of 0.001 UN
Characteristic angle -90° to +90° in steps of 5°
Delay 0 to 1 s in steps of 0.001 s
Accuracy of the current pick-up setting ±10% of setting
Table 35 Distance protection (21)
Five measuring stages with polygonal impedance characteristic forward and backward
All values of settings referred to the secondaries, every zone can be set independently of the others
4 independent parameter sets
Impedance measurement -300 to 300 /ph in steps of 0.01 /ph
Zero-sequence current compensation 0 to 8 in steps of 0.01,
-180° to +90° in steps of 1°
Mutual impedance for parallel circuit lines 0 to 8 in steps of 0.01,
-90° to +90° in steps of 1°
Time step setting range 0 to 10 s in steps of 0.01 s
Underimpedance starters -999 to 999 /ph in steps of 0.1 /ph
Overcurrent starters 0.5 to 10 IN in steps of 0.01 IN
Min. operating current 0.1 to 2 IN in steps of 0.01 IN
Back-up overcurrent 0 to 10 IN in steps of 0.01 IN
Neutral current criterion 0.1 to 2 IN in steps of 0.01 IN
Neutral voltage criterion 0 to 2 UN in steps of 0.01 UN
Low-voltage criterion for detecting, for exam ple, a weak infeed
0 to 2 UN in steps of 0.01 UN
VT supervision
NPS/neutral voltage criterion
NPS/neutral current criterion
0.01 to 0.5 UN in steps of 0.01 UN
0.01 to 0.5 IN in steps of 0.01 IN
Accuracy (applicable for current time con stants between 40 and 150 ms)
amplitude error
phase error
Supplementary error for
- frequency fluctuations of +10%
- 10% third harmonic
- 10% fifth harmonic
±5% for U/UN >0.1
±2° for U/UN >0.1
±5%
±10%
±10%
Operating times of the distance protection
function (including tripping relay)
minimum
typical
(see also isochrones)
20 ms
25 ms
Typical reset time 25 ms
VT-MCB auxiliary contact requirements
Operation time <15 ms
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