FANOX SIA D, Руководство пользователя, Страница: 21 / 117

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SIA-D_
Rev. 07
21 / 117
ISO 9001:2008
4. PROTECTION FUNCTIONS AND FEATURES
4.1. Power supply
The SIA-D equipment is designed to be supplied from an auxiliary voltage of 110-230 Vac / 90-300
Vdc or 24-48 Vdc (can be selected for each model).
It can also be supplied from a 12V battery. The external 12 V battery is connected to the equipment
through an adapter that is plugged into the front communications port (KITCOM). It is useful for
cases like commissioning operations, discharges and repairs to the transformation centre as these
are situations when there is no auxiliary voltage or current in the line, and normally cause more
events, ground connections, forgotten tools, poor terminations, etc.
The operation of the digital output is not guaranteed when a battery power is used.
Using battery power supply does not inhibit the RS232 communications port, as it can be used
simultaneously.
When the equipment is being powered from a 12 V battery, it is capable of operating for 2 hours.
4.2. 50P Function. Phase instantaneous phase overcurrent
This protection function can be set by using three parameters:
Function Description Minimum Maximum Step Unit Default
50P
Phase instantaneous overcurrent
Permission - - Yes/No - No
Tap 0,10 30,00 0,01 I nominal 5,00
Operating time 0,02 300,0 0,01 s 0,02
The operating time is independent from the operating current flowing through the equipment, so if the
phase current exceeds its predetermined value for an equal or greater amount of time than this
preset value, the protection function activates (trips) and does not reset itself until the value of the
phase drops below the point of current tap.
The function activates at 100% of the preset input, and deactivates at 95%. The reset is
instantaneous.
The accuracy of the operating time is equal to the preset time plus a maximum of 30 ms.