Section 7
Voltage protection
7.1
Two step undervoltage protection UV2PTUV
IP14544-1 v3
7.1.1
Identification
M16876-1 v7
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
7.1.2
Functionality
M13789-3 v12
Undervoltages can occur in the power system during faults or abnormal conditions.
The two-step undervoltage protection function (UV2PTUV) can be used to open
circuit breakers to prepare for system restoration at power outages or as a long-time
delayed back-up to the primary protection.
UV2PTUV has two voltage steps, each with inverse or definite time delay.
It has a high reset ratio to allow settings close to the system service voltage.
1MRK 505 384-UEN A
Section 7
Voltage protection
Breaker protection REQ650 2.2 IEC
163
Technical manual
Summary of Contents for impreza 2017
Page 1: ...RELION 650 SERIES Breaker protection REQ650 Version 2 2 Technical manual...
Page 2: ......
Page 32: ...26...
Page 42: ...36...
Page 50: ...44...
Page 168: ...162...
Page 226: ...220...
Page 396: ...390...
Page 498: ...492...
Page 512: ...506...
Page 528: ...522...
Page 632: ...626...
Page 650: ...644...
Page 738: ...732...
Page 784: ...778...
Page 785: ...779...