Bender ATICS Series, Руководство пользователя, Страница: 24 / 104

24 ATICS-DIO_D00080_03_M_XXEN / 04.2021
System description
3.5.2 Monitoring the device functions
The control circuits are designed in such a way that, even though it is almost certain that a particular
fault will occur, it cannot cause the power supply at the output of the automatic transfer switching de-
vice to fail.
ATICS® tests the position of the switch as well as coils 1 and 2 of the switch once a day at around
12:00 pm.
ATICS® also continuously monitors:
• Power supplies 1 and 2, which supply the electronics from the systems concerned
• Internal microcontrollers and memory modules
• Important connecting wires, such as the measuring current transformer connection
• For alarm and test combinations and alarm indicator and operator panels, device failure mon-
itoring can also be programmed via the BMS bus (required for functional safety, see chapter
„Setting parameters of indicator devices“ on p. 43).
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arning
for systems with generator: Complete power failure may occur.
If the preferred line fails, the ATICS® will start the generator connected to the redundant line. If the
generator does not start, the line downstream of the transfer switching device will be dead. When
the generator is switched off, the ATICS® cannot check the redundant line. Test the generator at re-
gular intervals and the transfer switching device to make sure they are working properly (see che-
cklist, included in the scope of delivery).
3.5.3 Power supply
The coils of the changeover switch are each supplied from the line which is not currently switched on.
This ensures that it is possible to switch to the redundant line if the preferred line fails, for example.
The power supply of the electronic system is redundant from lines 1 and 2. This ensures constant sup-
ply to the electronic system even when one line fails.
If both lines fail, the changeover switch remains in the last switch position. Switch the ATICS® to posi-
tion "0" using an Allen key. When power is restored, the ATICS® switches on the supply again with the
set delay time t(start). If several ATICS® are installed in one system, they can be switched to the pre-
ferred line one-by-one starting from switch position "0" on voltage recovery. This prevents the peak
loads that would occur if the lines of several transfer switching devices were switched on
simultaneously.
3.5.4 Manual mode
In manual mode, changeover can be achieved using an Allen key. The switching device can be can be
locked in switch position "0" with a padlock.