Mitsubishi Electric FR-A700 Technical Manual page 346

[Pr. 51]
[Pr. 450] [Pr. 9]
Second
Second Electronic
Electronic
Applied Thermal
Thermal O/
Motor O/L Relay
L Relay
9999 0
0.01 to 500
(0.1 to 3600)
Other than
9999
0
0.01 to 500
(0.1 to 3600)
Other than
0
9999
0.01 to 500
(0.1 to 3600)
Other than Other than
9999 0
0.01 to 500
(0.1 to 3600)
... Output current value is used to perform integration processing.
...Output current is assumed as 0A to perform integration processing.
(cooling processing)
×.....Electronic thermal relay function is not activated.
(3) Fault definition [Pr. 875]
When [Pr. 875 = 0], the inverter immediately shut off
output at fault occurrence and outputs faults.
When [Pr. 875 = 1] and external thermal relay
(E.OHT), motor overload (electronic thermal relay
2.17.4 Input/output phase loss protection selection [Pr. 251, 872]
You can disable the output phase loss protection function
that stops the inverter output if one of the inverter output
side (load side) three phases (U, V, W) is lost.
The input phase loss protection function of the inverter
input side (R/L1, S/L2, T/L3) can also be valid.
Initial
[Pr. ] Name
Value
Output
phase loss
251 1
protection
selection
A700 F700
Input
phase loss D700
872
0
protection
E700
selection
1
RT = OFF RT = ON
× × ×
9999
× × ×
0
× ×
×
9999
×
0
× × ×
9999
× × ×
0
× ×
9999
×
0
A700
Setting
Description
Range
Without output
0 phase loss
protection
With output
1 phase loss
protection
Without input
0 phase loss
protection
With input phase
1
loss protection
function) (E.THM) or PTC thermistor (E.PTC) is
activated, turning ON the alarm output 2 signal (ER)
starts the motor to decelerate and provides a fault
after deceleration to a stop.
When the ER signal turns ON, decrease load, etc. to
×
allow the inverter to decelerate.
×
At occurrence of a fault other than E.OHT, E.THM
and E.PTC, the inverter trips immediately and a fault
×
signal is output.
×
Set 97 (positive logic) or 197 (negative logic) in [Pr.
190 to Pr. 196 Output terminal function selection] and
×
assign the ER signal to the output terminal.
×
This function is invalid during vector control.
The value 0 is recommended for the system in which
the motor continues running without deceleration due
×
to a large torque on the load side.
When [Pr.875 = 1]
Output
speed
Alarm output
(ALM, ALM2)
Minor fault
output 2
(1) Output phase loss protection selection
[Pr. 251]
When [Pr. 251 = 0], output phase loss protection
(E.LF) becomes invalid.
(2) Input phase loss protection selection [Pr.
872]
When [Pr. 872 = 1], input phase loss protection
(E.ILF) is provided if a phase loss of one phase
among the three phases is detected for 1s
continuously.
Note that if input phase is lost when [Pr. 261 ≠ 0] in
A700 F700
input phase loss protection (E.ILF) is not provided but
power-failure deceleration is made.
When an input phase loss occurs in the R/L1 and S/
L2 phases, input phase loss protection is not
provided but the inverter output is shut off.
If the load is light, lost phase cannot be detected in
E700 D700
based on the fluctuation of bus voltage. It cannot be
detected under regenerative load either.
Also, input loss protection (E.ILF) may occur when
phase voltage is largely unbalanced among three
phases.
380
PARAMETER
ON
(ER)
OHT
occurrence
common
(common)
(power failure stop function valid),
because detection is performed
ON
E.OHT
display