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H) Protective Function Parameter - Mitsubishi Electric FR-F820-00046 Instruction Manual

Fr-f800 series.
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5.7

(H) Protective function parameter

Purpose
To protect the motor from overheating
To set the overheat protection
characteristics for the motor
To extend the life of the cooling fan
To detect an earth (ground) fault at start
To vary the operating level of the
undervoltage protective function
To initiate an inverter protective
function
To disable the I/O phase loss protective
function
To restart using the retry function when
the protective function is activated
To operate without activating protective
functions in case of emergency
To set the upper and lower limits of the
output frequency
To operate avoiding resonance points
To limit the output current so that the
inverter protective function does not
activate
To monitor for load faults
To shut off output if the operation panel
disconnects
5.7.1
Motor overheat protection (electronic thermal O/L
relay)
Set the current of the electronic thermal relay function to protect the motor from overheating. Such settings provide the optimum
protective characteristic considering the low cooling capability of the motor during low-speed operation.
Pr.
9
Electronic thermal O/L relay
H000
600
First free thermal reduction
H001
frequency 1
601
First free thermal reduction
H002
ratio 1
602
First free thermal reduction
H003
frequency 2
603
First free thermal reduction
H004
ratio 2
604
First free thermal reduction
H005
frequency 3
607
Motor permissible load level
H006
252
5. PARAMETERS
5.7 (H) Protective function parameter
Electronic thermal O/L relay
Free thermal O/L relay
Cooling fan operation
selection
Earth (ground) fault detection
at start
Undervoltage level
Fault initiation
I/O phase loss protection
selection
Retry operation
Emergency drive
Maximum/minimum
frequency
Frequency jump
Stall prevention
Load characteristics fault
detection
Overspeed detection level
Name
Initial value
Inverter rated
current
9999
100%
9999
100%
9999
150%
Parameter to set
P.H000, P.H006,
P.H010, P.H016,
P.H020, P.H021
P.H001 to P.H005,
P.H011 to P.H015
P.H100
P.H101
P.H102
P.H103
P.H200, P.H201
P.H300 to P.H303
P.H320 to P.H324
P.H400 to P.H402
P.H420 to P.H425,
P.H429
P.H500, P.H501,
P.H600, P.H601,
P.H610, P.H611,
P.H620, P.H621,
P.H631, P.M430,
P.T010, P.T040
P.H520 to P.H527,
P.H531 to P.H535
P.H800
Setting range
*1
0 to 500 A
Set the rated motor current.
*2
0 to 3600 A
0 to 590 Hz
9999
1 to 100%
The electronic thermal O/L relay operation level can
9999
be changed to match the motor temperature
0 to 590 Hz
characteristics with the combination of these three
points (Pr.600, Pr.601), (Pr.602, Pr.603), (Pr.604,
9999
Pr.9).
1 to 100%
9999: Free thermal O/L relay invalid
9999
0 to 590 Hz
9999
Set the permissible load according to the motor
110 to 250%
characteristics.
Refer to page
Pr.9, Pr.51, Pr.561,
Pr.607, Pr.608,
252
Pr.1016
Pr.600 to Pr.604,
258
Pr.692 to Pr.696
Pr.244
258
Pr.249
259
Pr.598
260
Pr.997
260
Pr.251, Pr.872
260
Pr.65, Pr.67 to Pr.69
261
Pr.514, Pr.515,
Pr.523, Pr.524,
263
Pr.1013
Pr.1, Pr.2, Pr.18
271
Pr.31 to Pr.36,
272
Pr.552
Pr.22, Pr.23, Pr.48,
Pr.49, Pr.66, Pr.148,
Pr.149, Pr.154,
273
Pr.156, Pr.157,
Pr.858, Pr.868
Pr.1480 to Pr.1492
281
Pr.374
285
Description

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