ABB REM615 ANSI - Page 31

ABB 31
Motor Protection
REM615 ANSI
Product Version 2.0
1MAC251744 -PG Rev. A
Issued: 03.01.2010
Table 60. 
ree-phase voltage measurements (VA, VB, VC)
Characteristic Value
Pickup
accuracy
Depending on the frequency of the voltage measured: fn ±2Hz
(at voltages in range 0.01...1.15 x Un)
±0.5% or ±0.002 x U
n
Suppression of har-
monics
DFT: -50dB at f = n x f
n
, where n = 2, 3, 4, 5,…
RMS: No suppression
Table 61. Voltage sequence components (V1, V2, V0)
Characteristic Value
Pickup
accuracy
Depending on the frequency of the voltage measured: fn ±2Hz
at voltages in the range of 0.01…1.15 x Un
±1.0% or ±0.002 x U
n
Suppression of har-
monics
DFT: -50dB at f = n x f
n
, where n = 2, 3, 4, 5,…
Table 64.  ree-phase power and energy (P, E)
Characteristic Value
Pickup
accuracy
At all three currents in range 0.10…1.20 x In
At all three voltages in range 0.50…1.15 x Un
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 har-
monics
DFT: -50dB at f = n x f
n
, where n = 2, 3, 4, 5,…
Table 62. Ground current measurement (IG)
Characteristic Value
Pickup
accuracy
Depending on the frequency of the current measured: f/fn = ±2Hz
±0.5% or ±0.002 x In
at currents in the range of 0.01...4.00 x In
Suppression of har-
monics
DFT: -50dB at f = n x fn, where n = 2, 3, 4, 5,…
RMS: No suppression
Table 63. Ground voltage measurement (VG)
Characteristic Value
Pickup
accuracy
Depending on the frequency of the current measured: f/fn = ±2Hz
±0.5% or ±0.002 x Un
Suppression of har-
monics
DFT: -50dB at f = n x fn, where n = 2, 3, 4, 5,…
RMS: No suppression