Section 9
Voltage protection
9.1
Two step undervoltage protection UV2PTUV (27)
IP14544-1 v3
9.1.1
Identification
M16876-1 v6
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-US
27
9.1.2
Functionality
M13789-3 v11
Undervoltages can occur in the power system during faults or abnormal conditions. Two step
undervoltage protection (UV2PTUV, 27) 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 (27) has two voltage steps, each with inverse or definite time delay.
UV2PTUV (27) has a high reset ratio to allow settings close to system service voltage.
9.1.3
Function block
M13794-3 v6
ANSI06000276-2-en.vsd
UV2PTUV (27)
V3P*
BLOCK
BLKTR1
BLK1
BLKTR2
BLK2
TRIP
TRST1
TRST1_A
TRST1_B
TRST1_C
TRST2
TRST2_A
TRST2_B
TRST2_C
PICKUP
PU_ST1
PU_ST1_A
PU_ST1_B
PU_ST1_C
PU_ST2
PU_ST2_A
PU_ST2_B
PU_ST2_C
ANSI06000276 V2 EN-US
Figure 322: UV2PTUV (27) function block
1MRK 502 066-UUS B
Section 9
Voltage protection
599
Technical manual
Содержание Relion 670 series
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