ABB REG670 - Two Step Undervoltage Protection UV2 PTUV

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, each with inverse or definite time delay.
UV2PTUV has a high reset ratio to allow settings close to system service voltage.
1MRK502052-UEN B Section 9
Voltage protection
477
Technical manual