ABB REF630 - Measurement Functions; Synchrocheck (SYNCRSYN); Three-Phase Current Measurement (CMMXU); Three-Phase Voltage Measurement (VPHMMXU)

Table 84. Synchrocheck (SYNCRSYN)
Characteristic Value
Operation accuracy At the frequency f = f
n
Voltage: ±1.0% or ±0.002 x U
n
Frequency: ±10 mHz
Phase angle ±2°
Reset time < 50 ms
Reset ratio Typical 0.96
Operate time accuracy ±1.0% of the set value or ±20 ms
Measurement functions
Table 85. Three-phase current measurement (CMMXU)
Characteristic Value
Operation accuracy At the frequency f = f
n
±0.5% or ±0.002 x I
n
(at currents in the range of 0.01...4.00 x I
n
)
Suppression of harmonics DFT: -50dB at f = n x f
n
, where n = 2, 3, 4, 5,
…
RMS: No suppression
Table 86. Three-phase voltage measurement (VPHMMXU )
Characteristic
Value
Operation accuracy At the frequency f = f
n
±0.5% or ±0.002 x U
n
(at voltages in the range of 0.01...1.15 × U
n
)
Suppression of harmonics DFT: -50dB at f = n × f
n
, where n = 2, 3, 4, 5,
…
RMS: No suppression
Feeder Protection and Control 1MRS756380 A
REF630
Product version: 1.0 Issued: 15.09.2009
56 ABB