H) Protective Function Parameter; Motor Overheat Protection (Electronic Thermal O/L Relay) - Mitsubishi Electric FR-A800 Series Instruction Manual

5.10
To protect the motor from overheating
To set the overheat protection
characteristics for the motor
To decelerate and stop when the motor
thermal protection is activated
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 set the upper and lower limits of the
output frequency
To prevent the motor from
overspeeding under torque control
To avoid overdriving the motor during
speed control
To operate avoiding resonance points
To limit the output current so that the
inverter protective function does not
activate
To limit the torque during speed control Torque limit
To monitor for load faults
To shut off output if the operation panel
disconnects
To shut off output if the operation panel
disconnects
5.10.1 Motor overheat protection (electronic thermal O/L
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.
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(H) Protective function parameter

Purpose
Electronic thermal O/L relay
Free thermal O/L relay
Fault definition
Cooling fan operation
selection
Earth (ground) fault detection
at start
Undervoltage level
Fault initiation
I/O phase loss
Retry operation
Maximum/minimum
frequency
Speed limit
Overdriving prevention
Frequency jump
Stall prevention
Load characteristics fault
detection
Overspeed detection level
Deceleration check
relay)
search engine
Parameter to set
P.H000, P.H006, Pr.9, Pr.51, Pr.561,
P.H010, P.H016, Pr.607, Pr.608,
P.H020 to P.H022 Pr.876, Pr.1016
P.H001 to P.H005, Pr.600 to Pr.604,
P.H011 to P.H015 Pr.692 to Pr.696
P.H030 Pr.875
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
P.H400 to P.H402 Pr.1, Pr.2, Pr.18
P.H410 to P.H412 Pr.807 to Pr.809
Pr.285 to Pr.853,
P.H415 to P.H417
Pr.873
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 to P.H603, Pr.49, Pr.66, Pr.114,
P.H610, P.H611, Pr.115, Pr.148,
P.H620, P.H621, Pr.149, Pr.154,
P.H631, P.M430, Pr.156, Pr.157,
P.T010, P.T040 Pr.858, Pr.868
P.H500, P.H700 to Pr.22, Pr.801,
P.H704, P.H710, Pr.803, Pr.810,
P.H720, P.H721, Pr.812 to Pr.817,
P.H730, P.T010, Pr.858, Pr.868,
P.T040, P.G210 Pr.874
P.H520 to P.H527,
Pr.1480 to Pr.1492
P.H531 to P.H535
P.H800 Pr.374
P.H881 Pr.690
5.10 (H) Protective function parameter
1
2
Refer to page
415
3
422
422
4
423
425
5
425
425
6
426
426
7
428
287
8
269
9
429
431 10
245
439
443
270
415
5. PARAMETERS