Undervoltage Detection Enable/Disable Selection; I/O Phase Loss Protection Selection; Retry Function - Mitsubishi Electric FR-CS82S-025 Instruction Manual

5.6.4

Undervoltage detection enable/disable selection

A fault caused by unstable power supply voltage (undervoltage (E.UVT)) can be detected.
Pr. Name
598 Undervoltage detection
H105 enable/disable selection
5.6.5

I/O phase loss protection selection

The output phase loss protection function, which stops the inverter output if one of the three phases (U, V, W) on the inverter's
output side (load side) is lost, can be disabled.
The input phase loss protective function on the inverter input side (R/L1, S/L2, T/L3) can be enabled.
Pr. Name
251 Output phase loss
H200 protection selection
872 Input phase loss
H201 protection selection
 Output phase loss protection selection (Pr.251)
• When is set to "0", output phase loss protection (E.LF) becomes invalid.
Pr.251
 Input phase loss protection selection (Pr.872)
• When is set to "1", input phase loss (E.ILF) protection is activated if one of three phases is detected to be lost for 1
Pr.872
second continuously.
NOTE
• When multiple motors are connected, output phase loss cannot be detected if the wiring to one motor loses phase.
• If the load is light or during a stop, lost phase cannot be detected because detection is performed based on the fluctuation of
bus voltage. Large unbalanced phase-to-phase voltage of the three-phase power supply may also cause input phase loss
protection (E.ILF).
• If an input phase is lost while "1" is set in Pr.872 (with input phase loss protection), and Pr.261 Power failure stop selection
≠ "0" (power failure stop function enabled), the motor decelerates to stop without outputting the input phase loss protection
(E.ILF).
• If an input phase loss continues for a long time, the lives of converter section and capacitor of the inverter become shorter.
Parameters referred to
Pr.261 Power failure stop selection
5.6.6

Retry function

This function allows the inverter to reset itself and restart at activation of the protective function (fault indication). The retry
generating protective functions can also be selected.
When the automatic restart after instantaneous power failure function is selected (
operation is also performed after a retry operation as well as after an instantaneous power failure. (For restart operation, refer
to page 159.)
Initial value
1
Initial value
1
1
page 160
Setting range
0 Undervoltage detection disabled
1 Undervoltage detection enabled
Setting range
0 Without output phase loss protection
1 With output phase loss protection
0 Without input phase loss protection
1 With input phase loss protection
Pr.57 Restart coasting time
Description
Description
≠ 9999), the restart
5. PARAMETERS
5.6 (H) Protective function parameter
2
2
3
4
5
6
7
8
9
10
115