Technical Data; Voltage Per Hertz Protection 24; Identification - ABB RELION 620 Series Technical Manual

1MAC504801-IB E
4.2.5.9
4.2.6
4.2.6.1
620 series ANSI
Technical Manual

Technical data

Table 248: 27PS Technical data
Characteristic
Operation accuracy
1)2)
Pickup time
V
value
V
value
Reset time
Reset ratio
Retardation time
Trip time accuracy in definite time mode
Suppression of harmonics
1) Pickup value = 1.0 × V , Positive sequence voltage before fault = 1.1 × V
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

Voltage per hertz protection 24

Identification

This function is available in REM620 Ver.2.1 only.
Function description
Voltage per hertz protection
Value
Depending on the frequency of the measured
voltage: f
±1.5% of the set value or ±0.002 × V
Minimum
Pickup
= 0.99 × set
52 ms
Fault
44 ms
= 0.9 × set Pickup
Fault
<40 ms
Depends on the set
<35 ms
±1.0% of the set value or ±20 ms
DFT: -50 dB at f = n × f
IEC 61850
identification
OEPVPH
Section 4
Protection functions
±2 Hz
n
n
Typical Maximum
55 ms 57 ms
46 ms 49 ms
Relative hysteresis
, where n = 2, 3, 4, 5,...
n
, f = 60 Hz, positive sequence
n n
IEC 60617 ANSI/IEEE C37.2
identification device number
U/f> 24
295