(H) Protective Function Parameter - Mitsubishi Electric FR-F800 Series Instruction Manual

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 check faulty area in the internal
storage device
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
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5. PARAMETERS
5.7 (H) Protective function parameter
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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
Internal storage device status
indication
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
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Parameter to set
P.H000, P.H006, Pr.9, Pr.51, Pr.561,
P.H010, P.H016, Pr.607, Pr.608,
P.H020, P.H021 Pr.1016
P.H001 to P.H005, Pr.600 to Pr.604,
P.H011 to P.H015 Pr.692 to Pr.696
P.H100 Pr.244
P.H101 Pr.249
P.H102 Pr.598
P.H103 Pr.997
P.H200, P.H201 Pr.251, Pr.872
P.H300 to P.H303 Pr.65, Pr.67 to Pr.69
Pr.57, Pr.136,
P.H320 to P.H324,
Pr.139, Pr.514,
P.A001, P.A004,
Pr.515, Pr.523,
P.A702
Pr.524, Pr.1013
P.H325 Pr.890
P.H400 to P.H402 Pr.1, Pr.2, Pr.18
P.H420 to P.H425, Pr.31 to Pr.36,
P.H429 Pr.552
P.H500, P.H501,
Pr.22, Pr.23, Pr.48,
P.H600, P.H601,
Pr.49, Pr.66, Pr.148,
P.H610, P.H611,
Pr.149, Pr.154,
P.H620, P.H621,
Pr.156, Pr.157,
P.H631, P.M430,
Pr.858, Pr.868
P.T010, P.T040
P.H520 to P.H527,
Pr.1480 to Pr.1492
P.H531 to P.H535
P.H800 Pr.374
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
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Description