ABB REG670 - Functionality

9.2.2 Functionality
Overvoltages may occur in the power system during abnormal conditions such as
sudden power loss, tap changer regulating failures, and open line ends on long lines.
OV2PTOV has two voltage steps, each of them with inverse or definite time delayed.
OV2PTOV has a high reset ratio to allow settings close to system service voltage.
9.2.3 Function block
IEC06000277-2-en.vsd
OV2PTOV
U3P*
BLOCK
BLKTR1
BLKST1
BLKTR2
BLKST2
TRIP
TR1
TR1L1
TR1L2
TR1L3
TR2
TR2L1
TR2L2
TR2L3
START
ST1
ST1L1
ST1L2
ST1L3
ST2
ST2L1
ST2L2
ST2L3
IEC06000277 V2 EN
Figure 234: OV2PTOV function block
9.2.4 Signals
Table 270: OV2PTOV Input signals
Name
Type Default Description
U3P GROUP
SIGNAL
- Group signal for three phase voltage input
BLOCK BOOLEAN 0 Block of function
BLKTR1 BOOLEAN 0 Block of operate signal, step 1
BLKST1 BOOLEAN 0 Block of step 1
BLKTR2 BOOLEAN 0 Block of operate signal, step 2
BLKST2 BOOLEAN 0 Block of step 2
Table 271: OV2PTOV Output signals
Name
Type Description
TRIP BOOLEAN Trip
TR1 BOOLEAN Common trip signal from step1
TR1L1 BOOLEAN Trip signal from step1 phase L1
Table continues on next page
Section 9 1MRK502052-UEN B
Voltage protection
492
Technical manual