Two step overvoltage protection (OV2PTOV, 59) function can be used to detect open
line ends, normally then combined with a directional reactive over-power function to
supervise the system voltage. When triggered, the function will cause an alarm, switch
in reactors, or switch out capacitor banks.
OV2PTOV (59) has two voltage steps, where step 1 can be set as inverse or definite
time delayed. Step 2 is always definite time delayed.
OV2PTOV (59) has an extremely high reset ratio to allow settings close to system
service voltage.
8.2.3
Function block
ANSI09000278-1-en.vsd
OV2PTOV (59)
V3P*
BLOCK
BLK1
BLK2
TRIP
TRST1
TRST2
PICKUP
PU_ST1
PU_ST1_A
PU_ST1_B
PU_ST1_C
PU_ST2
ANSI09000278 V1 EN
Figure 52:
OV2PTOV function block (59)
8.2.4
Signals
Table 71:
OV2PTOV (59) Input signals
Name
Type
Default
Description
V3P
GROUP
SIGNAL
-
Three phase group signal for voltage inputs
BLOCK
BOOLEAN
0
Block of function
BLK1
BOOLEAN
0
Block of step 1
BLK2
BOOLEAN
0
Block of step 2
Table 72:
OV2PTOV (59) Output signals
Name
Type
Description
TRIP
BOOLEAN
Common trip signal
TRST1
BOOLEAN
Trip signal from step 1
TRST2
BOOLEAN
Trip signal from step 2
PICKUP
BOOLEAN
General pickup signal
Table continues on next page
Section 8
1MRK 505 277-UUS C
Voltage protection
130
Technical Manual
Summary of Contents for REB650
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