Test Sequence - ABB ATS021 Installation And Operating Instructions Manual

Installation and operating instructions, ATS021
7. Using automatic transfer switch ATS021

7.3 TEST sequence

Figure 7.5 ATS021 is set to the TEST position by pushing the TEST key
By pushing the TEST key the automatic transfer switch ATS021 enters the test sequence. All the LEDs
are fi rst blinking a couple of times to give the information that the LED is functioning.
In the TEST position it is possible to simulate switching and back-switching sequences step-by-step
by pressing the TEST key. This is possible only if the automatic transfer switch is in manual mode. The
user can interrupt the simulation at any place and return to normal use of the device. Exiting from test
sequence is done by RESET key. More information, see the page 16.
NOTE: In the TEST sequence the power circuit is switched on!
NOTE: After testing the user must ensure that the device is not left in the TEST position by accident.
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