ABB REG650 User Manual

Section 9 Voltage protection
9.1 Two step undervoltage protection UV2PTUV
9.1.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Two step undervoltage protection UV2PTUV
3U<
SYMBOL-R-2U-GREATER-THAN
V2 EN
27
9.1.2 Functionality
Undervoltages can occur in the power system during faults or abnormal conditions.
Two step undervoltage protection (UV2PTUV) function can be used to open circuit
breakers to prepare for system restoration at power outages or as long-time delayed
back-up to primary protection.
UV2PTUV has two voltage steps, where step 1 is settable as inverse or definite time
delayed. Step 2 is always definite time delayed.
UV2PTUV has a high reset ratio to allow settings close to system service voltage.
9.1.3 Function block
UV2PTUV
U3P*
BLOCK
BLKST1
BLKST2
TRIP
TR1
TR2
START
ST1
ST1L1
ST1L2
ST1L3
ST2
IEC09000285_1_en.vsd
IEC09000285 V1 EN
Figure 130: UV2PTUV function block
1MRK 502 048-UEN A Section 9
Voltage protection
257
Technical manual

ABB REG650 Specifications

General

Brand	ABB
Model	REG650
Category	Protection Device
Language	English