Woodward
Manual MRI3 GB
12
DOK-TD-MRI3 Rev.A
Figure 3.8: Recording scheme of the fault recorder with pre-trigger time
Each memory segment has a specified storage time which permits setting of a time prior to the
trigger event.
Via the interface RS485 the data can be read and processed by means of a PC with HTL/PL-Soft4.
The data is graphically edited and displayed. Binary tracks are recorded as well, e.g. activation and
trip.
3.2.2 Parameter settings (see chapter 5)
System parameter
Relay type
MRI3-
I IE
IX
IRE
IRX
IR IER
IXR
IRER
IRXR
ER
XR
EX ISR IRSR SR
Display of measuring val-
ues as primary quantities
(I
prim
phase)
X X X X X X X X
Display of earth current as
primary quantities (I
prim
earth)
X X X X X X X X X
Display of residual voltage
UE as primary quantity
(U
prim
/U
sec
)
X X X
3pha/e-n/1:1
X X X
50/60
Hz
X X X X X X X X X X X
LED-Flash
X X X X X X X X X X X
RS 485 slave address
X
X
X
X
X
X
X
X
X
X
X
Baud-Rate
1)
X X X X X X X X X X X
Parity-Check
1)
X X X X X X X X X X X
Adjustment of the clock:
Y = year; M = month;
D = day; h = hour;
m = minute; s = sec.
X X X X X X X X X X X
Table 3.1: System parameters of the different relay types
1)
Only devices with Modbus-Protocol
trigger occurence
recording duration
Tpre
[s]