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1SDH000759R0002, L4106
Installation and operating instructions, ATS021
5. Installation
5.1 Parameter settings in automatic transfer switch ATS021
Automatic transfer switch ATS021 has total of eight (8) adjustable parameters. The parameter settings of
ATS021 are performed by the DIP switches (see next page) and by the rotary switches (see page 16).
Un Rated voltage, setting by DIP switches S23-1...3
fn Rated frequency, setting by DIP switch S23-4
N N in use, setting by DIP switch S24-1
Ph Number of phases, setting by DIP switch S24-2
Gen Generator in use, setting by DIP switch S24-3
Tgoff Generator stop delay , setting by DIP switch S24-4
TS Switching delay, setting by Ts rotary switch, see page 16
THR Voltage threshold, setting by Lim rotary switch, see page 16
5. Installation
Figure 5.1 Places of the DIP switches
Only an authorised electrician may perform the electrical installation and maintenance
of automatic transfer switches. Do not attempt any installation or maintenance actions
when an automatic transfer switch is connected to the electrical mains. Before starting
work, make sure that the circuit breaker is de-energised.
If single phase is used, the neutral should be connected.
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