GE MiCOM P40 Agile Technical Manual page 120

P44x/EN ST/Hb6
(ST) 4-46
Menu Text
DISTURB RECORDER
This sets the trigger point as a percentage of the duration. For example, the default
settings show that the overall recording time is set to 1.5s with the trigger point being at
33.3% of this, giving 0.5 s pre-fault and 1.0 s post fault recording times.
Trigger Mode
When set to single mode, if a further trigger occurs whilst a recording is taking place, the
recorder will ignore the trigger.
"ANALOG CHANNEL" submenus
Analog. Channel 1
to
Analog Channel 8
Assign an analogue input of the relay to an analogue channel.
"DIGITAL INPUT" and "INPUT TRIGGER" submenus
Digital Input xx
The relay 1 output digital channel is assigned to digital input 1 channel. The digital channel
will trigger the disturbance recorder when the corresponding assigned fault will occur. In
this case, the digital recorder will trigger when the output R1will change.
Following lines indicate default signals for the 64 Channels.
Input xx Trigger
This digital channel will not trigger the Disturbance recorder. When "Trigger L/H" is
selected, the channel will trigger the disturbance recorder when changing from '0' (low
Level) to '1' (High level). If "Trigger H/L" is selected, it will trigger when changing from '1'
(high level) to '0' (low level).
Note
The available analogue and digital signals differ between relay types and models.
The pre and post fault recording times are set by a combination of the 'Duration' and 'Trigger
Position' cells. 'Duration' sets the overall recording time and the 'Trigger Position' sets the
trigger point as a percentage of the duration. For example, the default settings show that the
overall recording time is set to 1.5 s with the trigger point being at 33.3% of this, giving 0.5 s
pre-fault and 1 s post fault recording times.
If a further trigger occurs whilst a recording is taking place, the recorder will ignore the trigger
if the 'Trigger Mode' has been set to 'Single'. However, if this has been set to 'Extended', the
post trigger timer will be reset to zero, thereby extending the recording time.
As can be seen from the menu, each of the analogue channels is selectable from the
available analogue inputs to the relay. The digital channels may be mapped to any of the
opto isolated inputs or output contacts, in addition to a number of internal relay digital
signals, such as protection starts, LEDs etc. The complete list of these signals may be found
by viewing the available settings in the relay menu or via a setting file in MiCOM S1 Agile.
Any of the digital channels may be selected to trigger the disturbance recorder on either a
low to high or a high to low transition, via the 'Input Trigger' cell. The default trigger settings
are that any dedicated trip output contacts (e.g. relay 3) will trigger the recorder.
Default Setting
Single Single / Extended
VA, VB, VC, VN, IA, IB, IC, IN, IM, V
VA
Checksync1, unassigned or V Checksync 2
Relay xx Any O/P Contacts or Any Opto Inputs or
or 'Not used' Internal Digital Signals
No Trigger No Trigger, Trigger L/H, Trigger H/L
MiCOM P40 Agile P442, P444
Setting Range
Min. Max.
Setting
Step Size