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Chapter 6. Description of Operation of Protection Subsystem
M7IRDA2003I
7IRD-A/J/M: Distribution Protection & Control Terminal
© ZIV APLICACIONES Y TECNOLOGÍA, S.L.U. 2020
6-34
6.14
Oscillographic Register (Optional)
The oscillography is composed of two different functions:
Capture
and
View
. The first refers to
the capture and storage of protection data in the terminal unit. Capture is a part of the relay
software. View refers to the collection and graphical display of the stored data. This is
performed by
ZiverCom
®
communication program run by a PC connected to the terminal unit.
Capture Function
An analog record is stored each time a sample is taken. Status Contact Input signals are only
stored by the Event Record function.
Stored Data
The following data is stored with a resolution time equal to the sampling rate:
-
Analog values of the samples selected for recording.
-
Starting time of the Oscillographic Record.
Number of Channels
Depending on the model, up to nine analogic channels can be used, with the ability to activate
or de-activate the channels as required with the relevant setting.
Recording Mode
The following Recording Modes are selectable:
Fixed Time YES
(Fixed Time Mode) and
Fixed
Time NO
(Variable Time Mode). In the first mode,
Fixed Time YES
, recording begins when the
Start
function is activated. Recording stops when the pre-determined
Record Length
set by the
user is reached. In the second Mode,
Fixed Time NO
, recording begins when the Start
Function is activated. Recording stops when the Start Function is de-activated.
Start Function
The
Start Function
consists of a programmable mask which can be applied to permit recording
to start after selected internal logic output signals or the
External Oscillographic Start Logic
Input Signal
. The
External Oscillographic Start
signal can be assigned to any of the physical
Status Contact Inputs.
This Start Function Control Mask is connected to each protection element within the relay. Only
connections that are enabled by the mask settings will activate the oscillography Start Function.
The activation occurs when any of the selected protection elements pick up, and de-activation
occurs when all selected elements are reset.
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Страница 175: ...D List of Illustrations and Tables...