ABB RET615 Product Manual page 48

Transformer Protection and Control
RET615
Product version: 4.0
Table 59. Residual voltage measurement (RESVMMXU)
Characteristic
Operation accuracy
Suppression of harmonics
Table 60. Three-phase power and energy (PEMMXU)
Characteristic
Operation accuracy
Suppression of harmonics
48
Value
Depending on the frequency of the current measured: f/f
= ±2 Hz
±0.5% or ±0.002 x U
n
DFT: -50 dB at f = n x f , where n = 2, 3, 4, 5,...
n
RMS: No suppression
Value
At all three currents in range 0.10...1.20 x I
At all three voltages in range 0.50...1.15 x U
At the frequency f ±1 Hz
n
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
DFT: -50 dB at f = n x f , where n = 2, 3, 4, 5,...
n
1MRS756891 F
n
n
n
ABB