Function
Range or value
Accuracy
Relay open angle ROA
(0-90) degrees
±
2.0 degrees
Operate time, non-directional
residual over current
60 ms typically at 0 to 2 x I
set
60 ms typically at 0 to 2 x 1
set
Reset time, non-directional
residual over current
65 ms typically at 2 to 0 x I
set
65 ms typically at 2 to 0 x 1
set
Operate time, non-directional
residual overvoltage
45 ms typically at 0.8 to 1.5 x U
set
45 ms typically at 0.8 to 1.5 x U
set
Reset time, non-directional
residual overvoltage
85 ms typically at 1.2 to 0.8 x U
set
85 ms typically at 1.2 to 0.8 x U
set
Operate time, directional
residual over current
140 ms typically at 0.5 to 2 x I
set
-
Reset time, directional
residual over current
85 ms typically at 2 to 0.5 x I
set
-
Critical impulse time non-
directional residual over
current
35 ms typically at 0 to 2 x I
set
-
Impulse margin time non-
directional residual over
current
25 ms typically
-
7.8
Time delayed 2-step undercurrent protection
UC2PTUC (37)
7.8.1
Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Time delayed 2-step undercurrent
protection
UC2PTUC
3I<
2
IEC09000131 V2 EN
37
7.8.2
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.
1MRK 506 335-UUS A
Section 7
Current protection
245
Technical manual
Содержание REL650 series
Страница 1: ...Relion 650 series Line distance protection REL650 ANSI Technical manual ...
Страница 2: ......
Страница 42: ...36 ...
Страница 48: ...42 ...
Страница 58: ...52 ...
Страница 68: ...62 ...
Страница 74: ...68 ...
Страница 194: ...188 ...
Страница 534: ...528 ...
Страница 580: ...574 ...
Страница 722: ...716 ...
Страница 792: ...786 ...
Страница 855: ...849 ...