It is essential to provide power frequency overvoltage protection, in the form of
time delayed element, either IDMT or DT to prevent equipment damage.
4.4.1.7
Signals
Table 431: PHPTOV Input signals
Name
Type
Default
Description
U_A_AB
SIGNAL
0
Phase to earth volt-
age A or phase to
phase voltage AB
U_B_BC
SIGNAL
0
Phase to earth volt-
age B or phase to
phase voltage BC
U_C_CA
SIGNAL
0
Phase to earth volt-
age C or phase to
phase voltage CA
BLOCK
BOOLEAN
0=False
Block signal for acti-
vating the blocking
mode
Table 432: PHPTOV Output signals
Name
Type
Description
OPERATE
BOOLEAN
Operate
START
BOOLEAN
Start
4.4.1.8
Settings
PHPTOV Group settings
Table 433: PHPTOV Group settings (Basic)
Parameter
Values (Range)
Unit
Step
Default
Description
Start value
0.05...1.60
xUn
0.01
1.10
Start value
Time multiplier
0.05...15.00
0.01
1.00
Time multiplier
in IEC/ANSI IDMT
curves
Operate delay time 40...300000
ms
10
40
Operate delay time
Operating curve
type
5=ANSI Def. Time
15=IEC Def. Time
17=Inv. Curve A
18=Inv. Curve B
19=Inv. Curve C
20=Programmable
15=IEC Def. Time
Selection of time
delay curve type
1MRS758755 C
Protection functions
REC615 & RER615
Technical Manual
425
Содержание Relion REC615
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