ZIV 7IRD-A, Инструкция по эксплуатации

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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
6-12
6.5 General Settings

Equipment in Service
When the equipment is in service ( YES ), all the integrated functions of the equipment function
normally (always in relation to the settings chosen for these functions).
When the equipment is out of service (
NO ), its function will be reduced exclusively to metering
operations. The measured values will appear in the display and can be seen through local and
remote communications.

Transformer Ratio
The transformer ratio settings (phase and/or ground, depending on model) only affect to the
analog values displayed on the HMI.
A transformer ratio setting of 1 will display the secondary values of the CTs. A setting equivalent
to the CT transformation ratio will display the primary values of the system.

Open Breaker Status
The function of the Open Breaker Status Input controls the state of the breaker and this input
can be defined as contact normally open (with breaker open), which corresponds to the setting
“0”, or as contact normally (with breaker closed), which corresponds to the setting “1”.
The state of the breaker is used by the Recloser (
7IRD-A/J Models) to define the state of Block
due to Open Breaker and the beginning of the reclosing cycle. Moreover, it is linked to the
Breaker operation which occur from the keyboard and via communications. Lastly, the open
phase unit will not pick up if the breaker is open.

Event Masking
It is possible to mask unneeded events or those events without importance for the study of
protection behaviour. Event masking can be done only through
ZiverCom ® communications
software.