11
Code
Event
Number represent-
Default
ing the event
multiplier
E1
Harmonics blocking
1
0
E2
Harmonics blocking reset
2
0
E3
Tripping
4
1
E4
Tripping reset
8
0
E50
Restarting
*
-
E51
Overflow of event register
*
-
E52
Temporary data communication disturbance
*
-
E53
No response from the module over
the data communication
*
-
E54
The module responds again over the
data communication
*
-
Event codes
Over the SPA bus the substation control data
communicator can read event data, such as
blockings and trippings, from the individual
differential relay modules of the relay. On
request the unit writes out the event data in the
form: time (ss.sss) and event code. The event
codes of the module are E1. . . E4, and E50 and
E51. Further, the control data communicator
can form event codes referring to e.g. the data
communication.
The event codes E1...E4 and the events
represented by these can be included in or
excluded from the event reporting by writing,
over the SPA bus, an event mask (V155) to the
module. The event mask is a binary number
given in the form of a decimal number. The
event codes E1. . . E4 are represented by the
values 1, 2, 4 or 8. The event mask is obtained
by multiplying the above numbers either by 0
(event not included in the reporting) or by 1
(event included in the reporting) and adding
the numbers received (cf. section “Checksum
calculation”) .
The event mask may have a value in the range
0…15 . The default value of the differential
relay module is 4, which means that the tripping
data is transferred to the control data
communicator. The codes E50. . . E54 and the
events represented by these cannot be
excluded from the event reporting.
0
not included in the event reporting
1
included in the event reporting
*
no code number
-
cannot be programmed
NOTE!
In the SPACOM system the event codes
E52...E54 are formed by the substation level
control data communicator.