Led Indicators - ABB ATS022 Installation And Operating Instructions Manual

Installation and operating instructions, ATS022
Ref. Description
12 LED ALARM: indicates active alarm
13 Tx/Rx LED: indicates bus communication status
14 GRAPHIC DISPLAY
15 PLATE SHOWING LINES STATUS CODES
16 Serial No.
Table 5.1: Description of ATS022 interface

5.2 LED indicators

Alarm
The steady red Alarm LED may indicate the switching logic disabled condition or one of the following
events:
• circuit breakers command failed
• protection releases tripped
• removal of circuit breakers
• generator alarm
• logic disabling from input DI3
• CBs closed (2 or 3 depending on the configuration)
The alarm LED switches Off indicating that the switching logic is enabled and no alarms are present
Auto
The Auto LED indicates the operating mode:
• manual: LED Off
• automatic: steady green LED
• test: flashing green LED
Power
LED Power LED indicates the presence of power supply:
• power supply present: steady green LED indicates power supply from line voltage or from auxiliary
source present
• no power supply: LED Off indicates that both lines are not present and that the Powersave condition
has ended. The switching logic is in stand-by for return of one of the line voltages
• Powersave: green flashing LED indicates, if both lines are absent and if no auxiliary power supply is
present, that the device is active and is in stand-by for return of one of the line voltages (maximum
duration 1 minute). When the Powersave period ends, the LED switches off and the device awaits
a line voltage. The moment the normal or the emergency line is restored, with ATS022 in automatic,
the unit analyses the conditions of the lines monitored and the status of the circuit breakers and
proceeds with the switching operation in accordance with the situation concerned.
TX/RX
The TX/RX LED indicates the bus communication status.
• Communication via bus under way: green LED flashing at variable frequency
• Communication via bus not active: LED Off
1SDH000760R0002
5. Using the automatic transfer switch
18