Mitsubishi Electric FR-A800 Series Instruction Manual page 417

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
51 Second electronic thermal O/L
H010 relay
692 Second free thermal reduction
H011 frequency 1
693 Second free thermal reduction
H012 ratio 1
694 Second free thermal reduction
H013 frequency 2
695 Second free thermal reduction
H014 ratio 2
696 Second free thermal reduction
H015 frequency 3
608 Second motor permissible load
H016 level
561
PTC thermistor protection level 9999
H020
1016 PTC thermistor protection
H021 detection time
876
Thermal protector input
*4
H022
*1 The initial value for the FR-A820-00077(0.75K) or lower and FR-A840-00038(0.75K) or lower is set to the 85% of the inverter rated current.
*2 The setting range of the FR-A820-03160(55K) or lower and the FR-A840-01800(55K) or lower The minimum setting increment is 0.01 A.
*3 The setting range of the FR-A820-03800(75K) or higher and the FR-A840-02160(75K) or higher The minimum setting increment is 0.1 A.
*4 The setting is available when the FR-A8TP is installed.
 Electronic thermal O/L relay operation characteristic for induction motor
(Pr.9)
• This function detects the overload (overheat) of the motor and shut off the inverter output by stopping the operation of the
transistor at the inverter output side.
• Set the rated current (A) of the motor in Pr.9 Electronic thermal O/L relay. (If the motor has both 50 Hz and 60 Hz ratings
and the Pr.3 Base frequency is set to 60 Hz, set to 1.1 times the 60 Hz rated motor current.)
• Set "0" in Pr.9 to avoid activating the electronic thermal relay function; for example, when using an external thermal relay
for the motor.
(Note that the output transistor protection of the inverter is activated. (E.THT))
416
5. PARAMETERS
5.10 (H) Protective function parameter
Downloaded from ManualsNet.com
Name Initial value
Inverter rated
current
9999
100%
9999
100%
9999
150%
9999
9999
100%
9999
100%
9999
9999
0 s
1
search engine
Setting range
*2
0 to 500 A
Set the rated motor current.
*1
*3
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.
*2
0 to 500 A
Enabled when the RT signal is ON.
Set the rated motor current.
*3
0 to 3600 A
9999 Second electronic thermal O/L relay invalid
0 to 590 Hz
9999
1 to 100%
The electronic thermal O/L relay operation level can
9999
be changed to match the second motor temperature
0 to 590 Hz
characteristics with the combination of these three
points (Pr.692, Pr.693), (Pr.694, Pr.695), (Pr.696,
9999
Pr.51) when the RT signal is ON.
1 to 100%
9999: Second free thermal O/L relay invalid
9999
0 to 590 Hz
9999
Set the permissible frequency when the RT signal is
110 to 250%
ON.
The Pr.607 setting is applied even when the RT signal
9999
is ON.
0.5 to 30 kΩ Set the PTC thermistor protection level (resistance).
9999 PTC thermistor protection disabled
Set the time from when the resistance of the PTC
0 to 60 s thermistor reaches the protection level until the
protective function is activated.
0 Terminal OH of the control terminal option (FR-A8TP)
is invalid.
1 Terminal OH of the control terminal option (FR-A8TP)
is valid.
Description