ABB relion REF615, Product Manual

Page: 30 / 56

ABB 30
Feeder Protection and Control
REF615
Product version: 2.0 1MRS756379 D
Table 36. Three-phase undervoltage protection (PHPTUV)
Operation
accuracy Depending on the frequency of the voltage measured: f
n
±2Hz
±1.5% of the set value or ±0.002 x U
n
Start time 1) 2) Minimum Typical Maximum
U
Fault
= 0.9 x set Start value 62 ms 64 ms 66 ms
Reset time < 40 ms
Reset ratio Depends on 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)
Suppression of harmonics DFT: -50dB at f = n x f
n
,
where n = 2, 3, 4, 5,…
Table 37. Three-phase undervoltage protection (PHPTUV) main settings
Parameter Function Value (Range) Step
Start value PHPTUV 0.05...1.20 x U
n
0.01
Time multiplier PHPTUV 0.05...15.00 0.05
Operate delay time PHPTUV 60...300000 ms 10
Operating curve type
1)
PHPTUV Definite or inverse time
Curve type: 5, 15, 21, 22, 23
1) Start value = 1.0 x U
n
, Voltage before fault 1.1 x U
n
, f
n
= 50 Hz, undervoltage in one phase-to-phase with nominal
frequence injected from random phase angle, results based on statistical distribution of 1000 measurements
2) Includes the delay of the signal output contact
3) Minimum
Start value = 0.50, Start value multiples in range of 0.90 to 0.20
1) For further reference please refer to the Operating characteristics table at the end of the Technical data chapter
Table 38. Positive sequence undervoltage protection (PSPTUV)
Operation
accuracy Depending on the frequency of the voltage measured: f
n
±2Hz
±1.5% of the set value or ±0.002 x U
n
Start time
1) 2)
Minimum Typical Maximum
U
Fault
= 0.99 x set Start value 51 ms 53 ms 54 ms
U
Fault
= 0.9 x set Start value 43 ms 45 ms 46 ms
Reset time < 40 ms
Reset ratio Depends on the set Relative hysteresis
Retardation time < 35 ms
Operate time accuracy in definite time mode ±1.0% of the set value or ±20 ms
Suppression of harmonics DFT: -50dB at f = n x f
n
,
where n = 2, 3, 4, 5,…
1) Start value = 1.0 x U
n
, Positive sequence voltage before fault 1.1 x U
n
, f
n
= 50 Hz, positive sequence undervoltage
with nominal frequence injected from random phase angle, results based on statistical distribution of 1000
measurements
2) Includes the delay of the signal output contact