AZT-9
ZPrAE Sp. z o.o.
25
At the bottom there is an energy storage charge indicator. Three bars indicate that
the energy storage is fully charged. RESET button is used do cancel/confirm the
signalling. This operation can be performed after entering the correct level 1 password.
In the middle of the window, which is described as readouts, there are three tabs as
shown in fig. 5.5: measurements, protection status and maintenance. Protection status
indicates if functional block is energised, in operation or e.g. if the time of a given
protection stage is elapsing. Circuit breaker parameters are displayed under maintenance
i.e. circuit breaker operation counter, operation time and a sum of currents tripped out by
the circuit breaker.
Fig. 5.5. General overview of AZT-9 readouts/measurements tabs.
Next tab of the window allows the user to set up the protection device. It is shown in fig.
5.6. In this tab the user sets up:
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device ID – device name or name of the supported facility (factory number and year
of manufacture is available as read-only),
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phase protection – three operation stages,
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earth-fault protection – three operation stages,
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negative sequence protection – three operation stages,
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current circuit monitoring (CTS),
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breaker failure protection,
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configuration of group signalling relay,
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configuration of signal sources triggering the energy storage for two sections,
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operation delay of section No. 2 of energy storage,
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signal configuration for two logic gates.
