Applications
3.2 Controlling the switching devices
3KC ATC6300 transfer control device
Manual, 03/2018, L1V30535632002A-01
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3.2
Controlling the switching devices
The ATC6300 can control various devices for automatic transfer switching.
How the control of the switching devices can be implemented is shown below.
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Depending on the type of transfer device used, the appropriate wiring diagram shall be
used (see chapter Connection (Page 65)), as well as the programmable inputs/outputs on
the ATC6300 (see chapter Description and designation of the outputs (Page 110)).
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Programmable outputs are set by default for the use of circuit breakers (see chapter
Description and designation of the outputs (Page 110))
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The device status inputs (e.g. status of circuit breakers) shall be wired according to the
circuit diagram, so as to ensure reliable system operation.
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Nonetheless, it is possible to manage without wiring the status inputs. This enables the
programmable inputs to be used for other functions. In this case the device behaves as if
the status feedback messages were received immediately.
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If the device status inputs are not used, then after power-on the ATC6300 sends an
"open" command, in order to put the switching devices in a defined status.
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If the device status inputs are used, then after power-on the ATC6300 does not send any
commands to the switching device. The corresponding switching devices are not
controlled until anomalies occur in the network.
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Internal control relays are neither electrically nor mechanically interlocked.
3.2.1
Controlling circuit breakers with motor operator
The control of circuit breakers with motor operator requires 4 outputs (open and close
commands for Line 1 and Line 2) and 2 inputs for circuit breaker status feedback, plus any
additional optional inputs for alarm signaling and TRIP, as well as optional outputs for
controlling undervoltage releases.
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Open and close commands can be output as a continuous signal or a pulse. For the
continuous signal, the pulse is applied continuously until the circuit breaker has reached
the required position.
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The command mode (continuous signal or pulse) can be selected by setting the
appropriate parameter under P05.07 in menu P05 to "Chg. Pul." or "Chg. Con."
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The TRIP status is ignored for a 15-second window every time an open command is sent
to the circuit breakers. This prevents a false alarm from being triggered if the circuit
breakers temporarily send a TRIP signal through their alarm switches while opening. This
has no effect on the function of the circuit breaker.
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If feedback inputs (circuit breaker status) are used and the circuit breaker does not close,
a second attempt is made before triggering an alarm.
Precise circuit diagrams as well as the parameters to be set can be found in chapter
Connection (Page 65) or in chapter Parameterization (Page 115).