ABB ATS022 Installation And Operating Instructions Manual page 32

Installation and operating instructions, ATS022
When the circuit breaker is inserted:
• the position indication contact closes
• the switching logic is re-enabled
• Alarm LED switches Off
• ATS022 operates in manual mode
• contact DO10 is closed
• Alarm contact DO6 is opened
• contact DO12 is opened
• the Auto LED switches Off
To set the device in automatic mode press RESET
• contact DO10 is Opened
• the Auto LED lights up
DI8 Generator Alarm
Input DI8 is used for connecting various alarms coming from the emergency generator: drop in oil
pressure, Over Temperature, etc.
Input DI8 may be set as normally open (NO) or normally closed (NC) by means of the menu on the
graphic display.
In case of an active generator alarm
• the switching logic is disabled
• Alartm contact DO6 is closed
• contact DO12 is closed
• the Alarm LED lights up
• the Auto LED switches Off
• contact DO10 is closed
• the display shows "generator alarm"
When the DI8 signal is deactivated:
• Alarm LED switches Off
• Alarm contact DO6 is opened
• contact DO12 is opened
• ATS022 operates in manual mode
• the "generator alarm" message disappears from the display
To set the device in automatic mode press RESET
• contact DO10 is Opened
• the Auto LED lights up
DI9 Forced switching on emergency power supply line
In certain industrial processes, supply of power from the emergency generator may be required instead
of from the normal power supply line, for brief moments, in order to avoid possible operating anomalies
of the supply and ensure high levels of reliability.
In automatic mode, by activating input DI9 the forced switching procedure is started up on the
emergency line:
• Generator Start
• opening of circuit breaker on normal line
• closure of circuit breaker on emergency line
The power supply from the emergency line persists as long as the command remains active. When the
command is deactivated, the unit proceeds with the switching procedure on the normal line.
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6. Input and output signals