Time Delayed 2-Step Undercurrent Protection Uc2Ptuc (37) - ABB REL650 series Technical Manual

1MRK 506 335-UUS A
7.8
7.8.1
7.8.2
Technical manual
Function
Relay open angle ROA
Operate time, non-directional
residual over current
Reset time, non-directional
residual over current
Operate time, non-directional
residual overvoltage
Reset time, non-directional
residual overvoltage
Operate time, directional
residual over current
Reset time, directional
residual over current
Critical impulse time non-
directional residual over
current
Impulse margin time non-
directional residual over
current
Time delayed 2-step undercurrent protection
UC2PTUC (37)
Identification
Function description
Time delayed 2-step undercurrent
protection
Functionality
Time delayed 2-step undercurrent protection UC2PTUC (37) function is used to supervise
the line for low current, for example, to detect a loss-of-load condition, which results in a
current lower than the normal load current.
Range or value
(0-90) degrees
60 ms typically at 0 to 2 x I
set
65 ms typically at 2 to 0 x I
set
45 ms typically at 0.8 to 1.5 x U
85 ms typically at 1.2 to 0.8 x U
140 ms typically at 0.5 to 2 x I
85 ms typically at 2 to 0.5 x I
set
35 ms typically at 0 to 2 x I
set
25 ms typically
IEC 61850
identification
UC2PTUC
Section 7
Current protection
Accuracy
± 2.0 degrees
60 ms typically at 0 to 2 x 1
65 ms typically at 2 to 0 x 1
45 ms typically at 0.8 to 1.5 x U
set
85 ms typically at 1.2 to 0.8 x U
set
-
set
-
-
-
IEC 60617 ANSI/IEEE C37.2
identification device number
37
3I<
2
IEC09000131 V2 EN
set
set
set
set
245