Installation and operating instructions, ATS021
1SDH000759R0002, L4106
28
7.2.3 LEDs
Line Status LED Indication
Voltage OK ON
No voltage OFF
Overvoltage Fast blinking (5 Hz)
Undervoltage Blinking (1 Hz, 50% ON / 50% OFF)
Invalid frequency Blinking (1 Hz, 90% ON / 10% OFF)
Unbalance Blinking (1Hz, 10% ON / 90% OFF)
Table 7.1 Line status indication
CB1
A red CB1 LED is ON, when the circuit breaker CB1 is in the ON position (the circuit breaker CB1 is ON
and the circuit breaker CB2 is OFF), the LED is OFF otherwise. While the circuit breaker CB1 is opening
or closing the CB1 led will blink. If the opening command fails, CB1 led will stay ON. If closing command
fails, CB1 led will blink.
CB2
A red CB2 LED is ON, when the circuit breaker CB2 is in the ON position (the circuit breaker CB2 is ON
and the circuit breaker CB1 is OFF), the LED is OFF otherwise. While the circuit breaker CB2 is opening
or closing the CB2 led will blink. If the opening command fails, CB2 led will stay ON. If closing command
fails, CB2 led will blink.
7. Using automatic transfer switch ATS021
Figure 7.4 LEDs on ATS021
LN 1 - CB1
A red LN 1 LED signals the status of the line LN 1 (normal line), when the circuit breaker CB1 is ON. Line
status is explained in the table below.
LN 2 - CB2
A red LN 2 LED signals the status of the line LN 2 (emergency line), when the circuit breaker CB2 is ON.
Line status is explained in the table below.
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