16 ATICS-2-ISO_D00046_04_M_XXEN / 03.2021
System description
3.5 The ATICS® functions
3.5.1 The automatic transfer switching device
If the preferred supply fails, the ATICS® ensures that the power supply is switched over safely.
The switch contacts are arranged offset on a rotating shaft. This design prevents simultaneous switch-
ing of line 1 and line 2. The switch has three positions:
1 Line 1 is connected
0 Both lines are disconnected
2 Line 2 is connected
Either line 1 or line 2 can be set as the preferred line (setting described in „Settings menu 1:
Changeover“ on p. 67 or chapter „Settings menu 6: Dig. input“ on p. 74).
1. In the normal operating condition (fault-free operation) the preferred supply is connected.
The ATICS® switches to the redundant line if:
– The preferred line fails
– The "TEST" button is pressed
– A digital input is configured to "TEST" and this input is enabled
– The setting "Preferred line" is changed to the other line
2. The ATICS® switches from the redundant line back to the preferred line if
– the voltage on the preferred line is restored and the return transfer delay time t(2->1) has
elapsed and no switch-back lock is enabled
– or immediately after pressing the "RESET" button or when the redundant line fails (even when
the switch-back lock is enabled)
– the setting "Preferred line" is changed to the other line
– the digital input is configured to "TEST" and this input is reset
– a test of the automatic transfer switching and monitoring device is active and the test period has
elapsed
3. Only for "-ES" version of ATICS® with ATICS-ES energy storage device: ATICS® switches to posi-
tion "0" and remains there if the following conditions are fulfilled simultaneously:
– Line 1 and line 2 have failed
– Automatic mode is active
– There is no short circuit downstream the transfer switching device
– The "Load disconn." setting is set to "on" and the external ATICS-ES energy storage device is con-
nected
I
Warning! Malfunction possible if delay times are not adjusted.
The response delay t(on), the return transfer delay time t(2->1), the delay on release t(off) and the
dead time t(0) of the ATICS® are adjustable and must be adjusted to the requirements of the specific
case, the short-circuit calculation and the requirements of DIN VDE 0100-710 (VDE 0100-710) for au-
tomatic transfer switching devices (see chapter „Commissioning, settings and testing“ on p. 45).
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