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1SDH000760R0002, L4106
Installation and operating instructions, ATS022
6. Connecting
6. Connecting
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.
6.1 Power circuit of the automatic transfer switch ATS022
Operating and measuring voltage area on 3 phase system
Main voltage: 100Vac - 480Vac (±20%)
Phase voltage: 57.7Vac - 277Vac (±20%)
AUX voltage: 24Vdc - 110Vdc (-10 to +15%)
Frequency: 50Hz - 60Hz, 16 2/3 Hz, 400 Hz (±10%)
Operating and measuring voltage area on 1 phase system
Phase voltage: 57.7Vac - 240Vac (±20%)
AUX voltage: 24Vdc - 110Vdc (-10 to +15%)
Frequency: 50Hz - 60Hz - 400 Hz - 16 2/3 Hz (±10%)
Phase setting, see the Chapter 8.
If the main voltage level is between 57.7Vac - 109Vac, the auxiliary power supply (AUX) must be used. If
the frequency is 16 2/3 Hz, the auxiliary power supply (AUX) and external transformer must be used.
6.2 Control circuit
When relay outputs are used with inductive loads (such as relays, contactors and
motors), they must be protected from voltage peaks using varistors, RC-protectors
(AC current) or DC current diodes (DC current).
Figure 6.1 Control circuit connections in ATS022
KA00418
X23
X24
X51
X29
X22
X32
X41
X11
Line 1
Line 2
X11
X12
X31
X22
X21
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