Section 9 Voltage Protection; Two Step Undervoltage Protection Uv2Ptuv; Identification; Functionality - ABB RET650 Technical Manual

1MRK 504 135-UEN A
Section 9
9.1
9.1.1
9.1.2
9.1.3
Technical manual
Voltage protection

Two step undervoltage protection UV2PTUV

Identification

Function description
Two step undervoltage protection

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.

Function block

UV2PTUV
U3P* TRIP
BLOCK TR1
BLKST1 TR2
BLKST2 START
ST1
ST1L1
ST1L2
ST1L3
ST2
IEC09000285_1_en.vsd
IEC09000285 V1 EN
Figure 90: UV2PTUV function block
Voltage protection
IEC 61850 IEC 60617
identification identification
UV2PTUV
3U<
SYMBOL-R-2U-GREATER-THAN
V2 EN
Section 9
ANSI/IEEE C37.2
device number
27
203