Mitsubishi Electric FR-D720-0.2K-G, Инструкция по эксплуатации

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101
Selection and protection of a motor
4
P
A
RAMETE
R
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4.9 Selection and protection of a motor
4.9.1 Motor overheat protection (Electronic thermal O/L relay, PTC thermistor protection)
(Pr. 9, Pr. 561, Pr.600 to Pr.604)

These parameters can be set when Pr. 160 Extended function display selection = "0". (Refer to page 161.)

Refer to page 288
for the rated motor current.

The value left of the slash is for the 2.2K drive unit or lower. The one right of the slash is for the 3.7K drive unit.

If a value exceeding the upper speed limit of the motor is set, the actual operation will be limited at the maximum rotation speed. The setting range is for the
S-PM motor. The maximum setting value differs depending on the number of poles of the applied motor.
........Specifications differ according to the date assembled. Refer to page 294 to check the SERIAL number.
Purpose Parameter that should be Set Refer to Page
Motor protection from overheat
Electronic thermal O/L relay
PTC thermistor protection
Pr. 9, Pr. 561 101
To set the overheat protection
characteristics for the motor Free thermal O/L relay
setting
Pr.600 to Pr.604 104
To select the motor to be used Applied motor Pr.71
105
To run by maximizing the
performance of the motor
Offline auto tuning
Pr.9, Pr.71, Pr.80, Pr.81, Pr.83,
Pr.84, Pr.90, Pr.92, Pr.93, Pr.96,
Pr.672, Pr.702, Pr.706, Pr.707,
Pr.711, Pr.712, Pr.717, Pr.721,
Pr.724 to Pr.726, Pr.859
105
Set the current of the electronic thermal relay function to protect the motor from overheat. This feature provides the
optimum protective characteristics, including reduced motor cooling capability, at low speed.
Parameter
Number
Name Initial Value Setting Range Description
9
Electronic thermal O/L
relay
Rated motor
current

0 to 500A Set the rated motor current.
561

PTC thermistor protection
level
9999
0.5 to 30k

Set the level (resistance value) for PTC
thermistor protection activates.
9999 PTC thermistor protection is inactive.
600 Free thermal reduction
speed 1
9999
0 to 12000r/min /
0 to 8000r/min

,
9999
The electronic thermal O/L relay operation
level can be changed to match the motor
temperature characteristics with the
combination of these three points
(Pr.600,
Pr.601), (Pr.602, Pr.603), (Pr.604, Pr.9) .
9999: Free thermal O/L relay invalid.
601
Free thermal reduction
ratio 1
100% 0 to 100%, 9999
602 Free thermal reduction
speed 2
9999
0 to 12000r/min /
0 to 8000r/min

,
9999
603
Free thermal reduction
ratio 2
100% 0 to 100%, 9999
604 Free thermal reduction
speed 3
9999
0 to 12000r/min /
0 to 8000r/min

,
9999