Monitored Data; Technical Data - ABB RELION REX640 Technical Manual

Section 4
Protection functions
4.3.8.11
4.3.8.12
734

Monitored data

Table 658: MHZPDIF Monitored data
Name Type
START_DUR FLOAT32
ID_A FLOAT32
ID_B FLOAT32
ID_C FLOAT32
MHZPDIF Enum

Technical data

Table 659: MHZPDIF Technical data
Characteristic
Operation accuracy
1)2)
Start time
I
Fault
Value (one phase fault)
I
Fault
Value (three phases
fault)
Reset time
Reset ratio
Retardation time
Operate time accuracy in definite time mode
Measurement mode = "Peak-to-Peak", current before fault = 0.0 × I
1)
nominal frequency injected from random phase angle, results based on statistical distribution of 1000
measurements
2) Includes the delay of the signal output contact
Values (Range) Unit
0.00...100.00 %
0.00...80.00 xIn
0.00...80.00 xIn
0.00...80.00 xIn
1=on
2=blocked
3=test
4=test/blocked
5=off
Value
Depending on the frequency of the measured
current: f
±1.5% of the set value or 0.002 × I
Minimum
Start
= 2.0 × set
13 ms
Start
= 2.0 × set 11 ms
<40 ms
Typically 0.96
<35 ms
±1.0% of the set value of ±20 ms
1MRS759142 C
Description
Ratio of start time /
operate time
Differential current phase
A
Differential current phase
B
Differential current phase
C
Status
±2 Hz
n
n
Typical Maximum
17 ms 21 ms
14 ms 17 ms
, f = 50 Hz, fault current with
n n
Technical Manual
REX640