ABB RER620

1MAC309294-MB F Section 4
Protection functions
RER620 197
Technical Manual
4.3.1.10 Technical data
Table 208: 59 Technical data
4.3.2 Single-phase undervoltage protection 27
4.3.2.1 Identification
4.3.2.2 Function block
Figure 89: Function block
Characteristic Value
Operation accuracy Depending on the frequency of the voltage
measured: f
n
±2Hz
±1.5% of the set value or ±0.002 x V
n
Pickup time
1,2
1. Pickup value = 1.0 x V
n
, Voltage before fault = 0.9 x V
n
, f
n
= 60 Hz, overvoltage in one phase-to-phase with
nominal frequency injected from random phase angle, results based on statistical distribution of 1000
measurements
2. Includes the delay of the signal output contact
Minimum Typical Maximum
V
Fault
= 1.1 x set Pickup
value
22 ms 24 ms 26 ms
Reset time < 40 ms
Reset ratio Depends of the set
Relative hysteresis
Retardation time < 35 ms
Operate time accuracy in definite time mode ±1.0% of the set value or ±20 ms
Operate time accuracy in inverse time mode
±5.0% of the theoretical value or ±20 ms
3
3. Maximum Pickup value = 1.20 x V
n
, Pickup value multiples in range of 1.10 to 2.00
Suppression of harmonics DFT: -50 dB at f = n x f
n
, where n = 2, 3, 4, 5,…
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Single-phase undervoltage protection SPHPTUV 3U< 27
V_B_BC
BLOCK
OPE RATE
START
27
V_A_AB
V_C_CA
OPR_A_AB
OPR_B_BC
OPR_C_CA
ST_A_AB
ST_B_BC
ST_C_CA