Event Code; Recorded Data - ABB REJ 527 Technical Reference Manual

REJ 527
4.1.8.
36
Technical Reference Manual
disturbance recorder. Setting the parameter M80 also enables
display of the primary values on the LCD.
M81 Used for designating the current conversion factor and unit. The
format of the parameter is XXXXX, YY; where XXXXX is the
conversion factor, and YY the unit. The conversion factor is the
ratio between the primary and secondary sides of the current
transformer (CT) multiplied by the rated current of the relay,
ranging between 0...65535. The unit is either A or kA. The
conversion factors and units are used for calculating the primary
values in a special PC program used for unloading the
disturbance recorder.

Event code

It is possible to set the disturbance recorder to generate an event code into the event
register when the recorder is triggered. To enable the event code to be generated, set
the event mask in serial parameter V158. The event code generated is E31.

Recorded data

On detection of a fault the recorder starts and records fault data. The latest five
events are saved. The submenu "Number of starts" under "Recorded data" indicates
how many times a protection function has started, range: 0...255.
Table 14: Recorded data
REGISTER Recorded data
EVENT1 Zero-sequence voltage U
current Iϕ and phase angle measured as percentual values of the rated
voltage and current. The angle is shown in degrees. Duration of the
latest start situation of stages t
percentage of the set operate time or, at IDMT mode of operation, of the
calculated operate time. Time stamp for the event; date and time.
The registers are updated when one of the stages U
or U >> starts or operates. The previous recorded values will be pushed
0
forward one step in the event register stack while the oldest values are
lost. The last five recorded events are memorized so that the most
recent values are stored in the register EVENT 1 and the other four
recorded values in registers EVENT 2...EVENT 5.
When the relay starts but does not operate, the relay memorizes the
values measured on U
When one of the stages operates, the values of the currents measured
at the moment of operation are recorded and the counter reading (t
t > or t
0 0
EVENT 2 The operation principle is the same as that of EVENT 1.
EVENT 3 The operation principle is the same as that of EVENT 1.
EVENT 4 The operation principle is the same as that of EVENT 1.
EVENT 5 The operation principle is the same as that of EVENT 1.
, earth-fault current I
0
>, t
b
, Iϕ and ϕ during the start situation.
, I
0 0
>>) for the stage which has operated is 100%.
ABB Substation Automation
Products and Systems
, directional earth-fault
0
>, and t >>, expressed as a
0 0
>, I >, I
0b 0
1MRS750616-MUM
>>, U >
0 0
>,
b