ABB RELION 620 Series Technical Manual page 606

Section 4
Protection functions
4.3.6.8
4.3.6.9
Table 534: MHZPDIF Group settings (Basic)
Parameter
Operate value
Minimum operate time
Table 535: MHZPDIF Non group settings (Basic)
Parameter
Operation
Table 536: MHZPDIF Non group settings (Advanced)
Parameter
Reset delay time
600
The sensitivity of the protection can be re-calculated taking into account the leakage
current through the varistor as per
I .
1000 0 020 (
= ⋅
prim
GUID-15CE21B4-EF82-4C43-96F0-4B02836B7A40 V1 EN
Signals
Table 532: MHZPDIF Input signals
Name
ID_A
ID_B
ID_C
BLOCK
Table 533: MHZPDIF Output signals
Name
OPERATE
START
Settings
Values (Range) Unit
0.5...50.0 %In
20...300000 ms
Values (Range) Unit
1=on
5=off
Values (Range) Unit
0...60000 ms
Equation
A . A . A
2 0 0085 0 002 )
+ ⋅ +
Type Default Description
REAl 0.0
REAL 0.0
REAL 0.0
BOOLEAN 0=False
Type Description
BOOLEAN
BOOLEAN
Step Default
0.1 0.5
10 20
Step Default
1=on
Step Default
1 0
109.
A
39
≈
Differential current amplitude (DFT) phase A
Differential current amplitude (DFT) phase B
Differential current amplitude (DFT) phase C
Block signal for activating the blocking mode
Operate
Start
Description
Operate value, percentage of the nominal
current
Minimum operate time
Description
Operation Off / On
Description
Reset delay time
1MRS757644 F
(Equation 127)
620 series
Technical Manual