118
1MRS751802-MUM
Protection Relay
Technical Reference Manual, Standard Configurations
REX 521
*
Used in configurations B01, B02, M01, M02
**
Used in configurations H02, H03, H04, H05, H06, H07, H08, H09, H01S, H02S, H03S, H04S, H05S,
H06S, H07S
Transient disturbance recorder, DREC
Operation mode
Pre-trg time
Over limit ILx
Over limit Io
Over limit Uo
AI filter time
Saturation
Overwrite
Extension
0…100%
0.00…40.00 x In
0.00…40.00 x In
0.00…2.00 x Un
0.000…60.000 s
The recording can be triggered by any (or several) of the alternatives listed below:
• triggering on the rising or falling edge of any (or several) of the digital inputs
• triggering on undercurrent, undervoltage
• triggering via serial communication or a parameter
• periodic triggering
The recording length depends on the number of recordings and inputs used. For example, the following
combination of recording length, number of recordings and number of inputs is available at 50 Hz
(in parentheses the total recording time at 60 Hz):
#
recordings \
#
inputs
1
2
3
4 *
5
6
7 **
1
1066 cyc.
21.3 s
(17.8 s)
581 cyc.
11.6 s
(9.7 s)
399 cyc.
8.0 s
(6.7 s)
304 cyc.
6.1 s
(5.1 s)
246 cyc.
4.9 s (
4.1 s)
206
4.1 s
(3.4 s)
177 cyc.
3.5 s
(3.0 s)
5
212 cyc.
4.2 s
(3.5 s)
116 cyc.
2.3 s
(1.9 s)
79 cyc.
1.6 s
(1.3 s)
60 cyc.
1.2 s
(1.0 s)
49 cyc.
1.0 s
(0.8 s)
41
0.8 s
(0.7 s)
35 cyc.
0.7 s
(0.6 s)
10
106 cyc.
2.1 s
(1.8 s)
57
1.1 s (
1.0 s)
39 cyc.
0.8 s
(0.7 s)
30 cyc.
0.6 s
(0.5 s)
24 cyc.
0.5 s
(0.4 s)
20 cyc.
0.4 s
(0.3 s)
17 cyc.
0.34 s
(0.28 s)
Summary of Contents for REX 521
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