LS SV0008iS7-2, Руководство пользователя

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Chapter 7 Checking and Troubleshooting
7-1
7.1 Checking and Troubleshooting
7.1.1 Protective functions
1) Protection from output current and input voltage
Type
Categor
y
Details
Over Load Latch
A failure occurs when you select the motor overload failure
and the load exceeds the set degree. Operation can resume
after PRT-20 is set at values other than 0.
Under Load Latch
A failure occurs when you select the underload protection
function and the motor load is within the set underload level.
Operation can resume after PRT-27 is set at values other
than 0.
Over
Current1
Latch
A failure occurs when the inverter output exceeds 200% of
the rated current.
Over Voltage Latch
A failure occurs when the DC circuit voltage exceeds the
prescribed amount.
Low Voltage Level
A failure occurs when the DC circuit voltage goes down
below the prescribed degree.
Ground Trip Latch
A failure occurs when current above the prescribed amount
flows due to earth in the inverter output part. The earth
causing current varies according to the capacity of the
inverter.
E-Thermal Latch
A failure occurs in order to prevent overheat during overload
operation according to the inverse time thermal
characteristic. Operation resumes if you set PRT-40 at
values other than 0.
Out Phase
Open
Latch
A failure occurs when one of the three phases output of the
inverter is phase open. Operation resumes if you set PRT-
05 bit 1 at 1.
In Phase
Open
Latch
A failure occurs when one of the three phases input of the
inverter is phase open. Operation resumes if you set PRT-
05 bit 2 at 1.
Inverter OLT Latch
This is the inverse time thermal characteristic protection
against heat between 150% 1 minute to 200% 0.5 second
on the basis of the inverter rated current. 200% 0.5 second
might differ according to the inverter capacity.
Low Voltage2 Latch
If DC circuit’s voltage falls below rated value, failure ocurr
during inverter in operation,.