ABB RELION 620 Series Technical Manual page 676

Section 4
Protection functions
4.5.7.9
4.5.7.10
4.5.8
4.5.8.1
670
Technical data
Table 636: PSPTUV Technical data
Characteristic
Operation accuracy
1)2)
Start time
U
value
U
value
Reset time
Reset ratio
Retardation time
Operate time accuracy in definite time mode
Suppression of harmonics
Start value = 1.0 × U
1) , positive-sequence voltage before fault = 1.1 × U
n
undervoltage 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
Technical revision history
Table 637: PSPTUV Technical revision history
Technical revision
B
C
D
Overexcitation protection OEPVPH
Identification
Function description
Overexcitation protection
Value
Depending on the frequency of the measured
voltage: f
±1.5% of the set value or ±0.002 × U
Minimum
Start
= 0.99 × set
52 ms
Fault
44 ms
= 0.9 × set Start
Fault
Typically 40 ms
Depends on the set
<35 ms
±1.0% of the set value or ±20 ms
DFT: -50 dB at f = n × f
Change
-
Internal improvement
Internal improvement
IEC 61850
identification
OEPVPH
1MRS757644 F
±2 Hz
n
n
Typical Maximum
55 ms 58 ms
47 ms 50 ms
Relative hysteresis
, where n = 2, 3, 4, 5,...
n
, f = 50 Hz, positive sequence
n n
IEC 60617 ANSI/IEEE C37.2
identification device number
U/f> 24
Technical Manual
620 series