Troubleshooting - ABB TruONE ATS Installation And Operating Instruction

Automatic transfer switches

Table of Contents

112

Tr u O N E ® AT S , I N S TA L L AT I O N A N D O P E R AT I N G I N S T R U C T I O N

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6. Troubleshooting

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6.1 Alarms

Message

Locked, Alarm LED on

Switch not in AUTO

mode, Alarm LED on

Phases crossed

S1 undervoltage

S1 overvoltage

S1 phase missing

S1 unbalance

S1 phase rotation

S1 invalid frequency

S2 undervoltage

S2 overvoltage

S2 phase missing

S2 unbalance

S2 phase rotation

Frequency Difference

Table 6.1 Alarms-list in level 3 and 4, LCD and touch control interfaces

Lock input activated

Slide switch is in handle or lock

Phase rotation of sources 1 and 2 are

Voltage of source 1 is under the

threshold level set in parameter "Drop-

out voltage, lower threshold"

Voltage of source 1 is over the

threshold level set in parameter "Drop-

out voltage, upper threshold"

One or two phases of source 1 are

Phases of source 1 are not symmetric

Phase rotation of source 1 is different

from the value of parameter "Phase

Frequency of source 1 is out of range

set in parameters "Drop-out frequency,

upper threshold" and "Drop-out

frequency, lower threshold"

Voltage of source 2 is under the

threshold level set in parameter "Drop-

out voltage, lower threshold"

Voltage of source 2 is over the

threshold level set in parameter "Drop-

out voltage, upper threshold"

One or two phases of source 2 are

Phases of source 2 are not symmetric

Phase rotation of source 2 is different

from the value of parameter "Phase

Frequency difference of voltage

sources is greater than 3 Hz while in-

phase monitor is on

Fault

Turn slide switch into the AUTO position

position

Connect the phases of both sources in

different