ABB REB500 - Page 47

1MRK 505 353-UEN Section 6
BP-Additions to base documentation
Application Manual 39
Bay protection functions REB500
Table 46 Distance Protection 21 (PDIS)
Function/ Parameter Range/ Value
• Impedance measurement
-300 to 300 W/ph in steps of 0.01 W/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 W/ph in steps of 0.1 W/ph
• Overcurrent starters
0.5 to 10 I
N
in steps of 0.01 I
N
• Min. operating current
0.1 to 2 I
N
in steps of 0.01 I
N
• Back-up overcurrent
0 to 10 I
N
in steps of 0.01 I
N
• Neutral current criterion
0.1 to 2 I
N
in steps of 0.01 I
N
• Neutral voltage criterion
0 to 2 U
N
in steps of 0.01 U
N
• Low-voltage criterion for detecting, for example, a weak infeed
0 to 2 U
N
in steps of 0.01 U
N
VT supervision
• NPS/neutral voltage criterion
• NPS/neutral current criterion
0.01 to 0.5 U
N
in steps of 0.01 U
N
0.01 to 0.5 I
N
in steps of 0.01 I
N
Operating times of the distance protection function (including tripping relay)
• minimum
• typical
(see also isochrones
• Figure 23)
20 ms
25 ms
Typical reset time
35 ms
VT-MCB auxiliary contact requirements
• Operation time <15 ms
· 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
Accuracies Value
Amplitude error
±5% for U/UN >0.1
Phase error
±2° for U/U
N
>0.1
Applicable for current time constants between 40 and 150 ms
For details about distance protection operating times see Figure 23