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Earth (ground) Fault Detection At Start; Inverter Output Fault Detection Enable/disable Selection - Mitsubishi Electric FR-CS84-012 Instruction Manual

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 External thermal relay input (OH signal, E.OHT)
Thermal relay protector
Inverter
U
V
W
OH
SD
External thermal relay input connection diagram
• The External thermal relay input (OH) signal is used when using the external thermal relay or the thermal protector built
into the motor to protect the motor from overheating.
• When the thermal relay is activated, the inverter output is shut off by the external thermal relay operation (E.OHT).
• For the terminal used for the OH signal input, set "7" in any of
the function.
NOTE
• Changing the terminal assignment using Pr.178 to Pr.182 (Input terminal function selection) may affect the other functions.
Set parameters after confirming the function of each terminal.
Parameters referred to
page 147
Pr.71 Applied motor
Pr.72 PWM frequency selection
Pr.178 to Pr.182 (Input terminal function selection)
Pr.195 (Output terminal function selection)
5.6.2

Earth (ground) fault detection at start

Select whether to make earth (ground) fault detection at start. When enabled, earth (ground) fault detection is performed
immediately after a start signal input to the inverter.
Pr.
249
Earth (ground) fault detection at
H101
start
• If a ground fault is detected at start while
and the output is shut off. (Refer to
setting is enabled during V/F control and General-purpose magnetic flux vector control.
Pr.249
NOTE
• Because the detection is performed at start, output is delayed for approx. 20 ms every start.
• Use Pr.249 to enable/disable earth (ground) fault detection at operation start. During operation, earth (ground) faults are
detected regardless of the Pr.249 setting.
5.6.3
Inverter output fault detection enable/disable
selection
Faults occurred on the inverter output side (load side) during operation (inverter output fault (E.E10)) can be detected.
Pr.
Inverter output fault
631
detection enable/disable
H104
selection
• When the
Pr.72 PWM frequency selection
114
5. PARAMETERS
5.6 (H) Protective function parameter
Motor
M
page 92
page 142
page 126
Name
1
Pr.249
page
217.)
Name
Initial value
1
setting is high, enable the ground fault detection at start.
Pr.178 to Pr.182 (Input terminal function selection)
Initial value
Setting range
0
1
= "1", the output-side earth (ground) fault overcurrent (E.GF) is displayed
Setting range
0
Output fault detection disabled
1
Output fault detection enabled
Description
Without the earth (ground) fault detection at
start
With the earth (ground) fault detection at start
Description
to assign

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