Section 8
1MAC050144-MB C
Measurement functions
568
615 series ANSI
Technical Manual
8.9.6
Technical data
Table 483: SP SE Technical data
8.10
Current total demand distortion, PQI
8.10.1
Identification
8.10.2
Function block
Figure 304:
Function block
8.10.3
Functionality
The Current total demand distortion PQI is used for monitoring the current total demand
distortion TDD.
8.10.4
Operation principle
The function can be enabled and disabled with the Operation setting. The corresponding
parameter values are Enable and Disable.
The operation of the current distortion monitoring function can be described with a module
diagram. All the modules in the diagram are explained in the next sections.
Characteristic
Value
Pickup accuracy
At all three currents in rage 0.10…1.20 x In
At all three voltages in range 0.50…1.15 x Vn
At the frequency fn ± 1Hz
Active power and energy in range |PF| > 0.71
Reactive power and energy in range |PF| < 0.71
± 1.5% for power (S, P and Q)
± 0.015 for power factor
± 1.5% for energy
Suppression of harmonics
DFT: -50 dB at f = n x fn, where n = 2, 3, 4, 5,…
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Current total demand distortion
CMHAI
PQM3I
PQI
Summary of Contents for 615 Series ANSI
Page 1: ...Relion Protection and Control 615 series ANSI Technical Manual ...
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Page 389: ...Section 4 1MAC050144 MB C Protection functions 382 615 series ANSI Technical Manual ...
Page 485: ...Section 6 1MAC050144 MB C Supervision functions 478 615 series ANSI Technical Manual ...
Page 635: ...Section 10 1MAC050144 MB C Other functions 628 615 series ANSI Technical Manual ...
Page 711: ...Section 16 1MAC050144 MB C Glossary 704 615 series ANSI Technical Manual ...
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