Fault Tracing; Contents Of This Chapter; Indicators; Fault Mode Of The Dc Breaker Switch - ABB ACS880-7407LC Hardware Manual

Fault tracing

Contents of this chapter

This chapter contains descriptions of status indicators of the semiconductor switch unit
ACS880-7407LC. It also contains a description of the Fault mode of the DC breaker switch,
and related instructions.

Indicators

Desig. Name
P30.1 Yellow indicator
P30.2 Green indicator

Fault mode of the DC breaker switch

The DC breaker switch goes into a Fault mode when the DC breaker detects:
• that an environment sensor is out of range
• an overload, and the External trigger input signal is still high (closed circuit)
• an overcurrent, and the External trigger input signal is still high (closed circuit)
• an internal fault.
When the DC breaker switch goes into the Fault mode, it trips (opens). It is not possible to
close the DC breaker switch. To go back to normal operation mode:
1. Eliminate the cause for the fault trip.
2. Close the DC breaker switch with the External trigger input signal: Open the control
circuit and close it again. See
Description (when illuminated)
DC breaker switch is open.
DC breaker switch is closed.
Default control connection diagram (page
Fault tracing 35
6
26).