ABB REG316 4 Series - Page 658

Numerical generator protection REG316*4
1MRK502004-Ben
Page 30
Technical Data Func-
tions (cont’d)
Technical Data Func-
tions (cont’d)
ABB Switzerland Ltd
Utility Automation
S
N =
Ö3 × U
N
× I
N
(three-phase)
S
N
= 1/3 × Ö3 × U
N
× I
N
(single-phase)
Table 46: Accuracy of the metering function UIfPQ and three-phase measuring module
(including input voltage and input current c.t.)
Input variable Accuracy Conditions
Core balance c.t.s
with error compensation
Protection c.t.s
without error com-
pensation
Voltage ±0.5% U
N
±1% U
N
0.2 to 1.2 U
N
f = f
N
Current ±0.5% I
N
±2% I
N
0.2 to 1.2 I
N
f = f
N
Real power ±0.5% S
N
±3% S
N
0.2 to 1.2 S
N
0.2 to 1.2 U
N
0.2 to 1.2 I
N
f = f
N
Apparent power ±0.5% S
N
±3% S
N
Power factor ±0.01 ±0.03 S = S
N
, f = f
N
Frequency ±0.1% f
N
±0.1% f
N
0.9 to 1,1 f
N
0.8 to 1,2 U
N