Automatic transfer switch
4 226 81
Installa
tion and user manual
9
Voltage line 1
Voltage Line 2
Line 2
selected
Selectable function
with MAN
Page scroll locked
Fig. 9 - Generator manual mode
Fig. 10 - Start Generator manual mode
3.3
Automatic mode (AUT)
• In automatic mode, the ATS checks permanently the lines and breakers status. Starting from the state of lines it performs
autonomously the closing/opening operations of breakers and the optional startup/shutdown of the generator set.
• When the main line (S.Q1) exceeds the specified limits for a time higher the one set, the green LED C (line presence)
switches off giving a “threshold out” alarm. The ATS disconnects the load from S.Q1 and connects it to the S.Q2 (if it is
available and within admitted limits). After S.Q1 returns within the specified thresholds, the ATS moves the load on this
one after it has checked the stability and the quality of line. One time the changeover is finished, the ATS can provide
to the eventual cooling cycle of generator set (if it is programmed).
• Automatic operating cycles vary both as a function of the type of application (Utility-Utility, Utility-Generator, Genera-
tor-Generator) and as a function of the type of devices used (motorized circuit breakers or contactors).
• It is possible to program the unit to open the priority line S.Q1 before or after the secondary line S.Q2 has been made
available, through parameter P05.05 in the M05 “changeover” menu.
• When the priority line S.Q1 turns within the established limits, the unit opens S.Q2 and switches the load on S.Q1. If on
S.Q2 is present a generator, the ATS provided to the eventual cooling cycle of it. It is possible also to lock the automatic
return to the priority line S.Q1 setting parameter P05.12. In this case it is necessary an external intervention to authorize
the turn of load to line S.Q1.
4. Power-up
• The ATS can be supplied at 100-240VAC.
• After first power-up the device normally starts in OFF/RESET mode.
• During the normal work of ATS, if it switches off, when it will be switched on it comes to operating mode actives before
the switching off.
• If it is necessary to modify this behaviour, the parameter P01.03 in the M01 “utilities” menu has to be changed.
• During power-up all the LEDs blink in order to verify their operation.
