Monitoring
M12386-1 v17
Table 160. Power system measurement CVMMXN
Function
Range or value
Accuracy
Frequency
(0.8-1.2) x f
r
±5.0 mHz for U at 0.2 × U
r
≤ U < 0.5 × U
r
±3.0 mHz for U at 0.5 × U
r
≤ U < 1.0 × U
r
±2.0 mHz for U at U ≥ U
r
Voltage
(10 to 300) V
±
0.3% of U at U
≤
50 V
±
0.2% of U at U
>
50 V
Current
(0.1-4.0) x I
r
±
0.8% of I at 0.1 x I
r
<
I
<
0.2 x I
r
±
0.5% of I at 0.2 x I
r
<
I
<
0.5 x I
r
±
0.2% of I at 0.5 x I
r
<
I
<
4.0 x I
r
Active power, P
(10 to 300) V
(0.1-4.0) x I
r
±
0.5% of S
r
at S
≤
0.5 x S
r
±
0.5% of S at S
>
0.5 x S
r
(100 to 220) V
(0.5-2.0) x I
r
cos
φ
>
0.7
±
0.2% of P
Reactive power, Q
(10 to 300) V
(0.1-4.0) x I
r
±
0.5% of S
r
at S
≤
0.5 x S
r
±
0.5% of S at S
>
0.5 x S
r
(100 to 220) V
(0.5-2.0) x I
r
cos
φ
<
0.7
±
0.2% of Q
Apparent power, S
(10 to 300) V
(0.1-4.0) x I
r
±
0.5% of S
r
at S
≤
0.5 x S
r
±
0.5% of S at S
>
0.5 x S
r
(100 to 220) V
(0.5-2.0) x I
r
±
0.2% of S
Power factor, cos (
φ
)
(10 to 300) V
(0.1-4.0) x I
r
<
0.02
(100 to 220) V
(0.5-2.0) x I
r
<
0.01
GUID-5E04B3F9-E1B7-4974-9C0B-DE9CD4A2408F v6
Table 161. Current measurement CMMXU
Function
Range or value
Accuracy
Current at symmetrical load
(0.1-4.0) × I
r
±0.3% of I
r
at I ≤ 0.5 × I
r
±0.3% of I at I > 0.5 × I
r
Phase angle at symmetrical load
(0.1-4.0) × I
r
±1.0 degrees at 0.1 × I
r
< I ≤ 0.5 × I
r
±0.5 degrees at 0.5 × I
r
< I ≤ 4.0 × I
r
GUID-374C2AF0-D647-4159-8D3A-71190FE3CFE0 v5
Table 162. Voltage measurement phase-phase VMMXU
Function
Range or value
Accuracy
Voltage
(10 to 300) V
±0.5% of U at U ≤ 50 V
±0.2% of U at U > 50 V
Phase angle
(10 to 300) V
±0.5 degrees at U ≤ 50 V
±0.2 degrees at U > 50 V
Line differential protection RED670
1MRK 505 379-BEN R
Version 2.2
Hitachi Energy
141
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