Mitsubishi Electric F700 User Manual

135
Operation setting at alarm occurrence
4
PARAMETERS
4.13.3 Input/output phase failure protection selection (Pr. 251, Pr. 872)
(1) Output phase failure protection selection (Pr. 251)
⋅ When Pr. 251 is set to "0", output phase failure protection (E.LF) becomes invalid.
(2) Input phase failure protection selection (Pr. 872)
⋅ When Pr. 872 is set to "1", input phase failure protection (E.ILF) is provided if a phase failure of one phase among
the three phases is detected for 1s continuously.
You can disable the output phase protection failure function that stops the inverter output if one of the inverter
output side (load side) three phases (U, V, W) opens.
The input phase failure protection selection of the inverter input side (R/L1, S/L2, T/L3) can be made valid.
Parameter
Number
Name Initial Value Setting Range Description
251
Output phase failure protection
selection
1
0 Without output phase failure protection
1 With output phase failure protection
872
Input phase failure protection
selection
0
0 Without input phase failure protection
1 With input phase failure protection
The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 156)
REMARKS
If an input phase failure has occurred when Pr. 872 = "1" (input phase failure protected) and a value other than "0" (power failure
stop function valid) is set in Pr. 261, input phase failure protection (E.ILF) is not provided but power-failure deceleration is made.
CAUTION
⋅ When an input phase failure occurs in the R/L1 and S/L2 phases, input phase failure protection is not provided but the
inverter output is shut off.
⋅ If an input phase failure continues for a long time, the converter section and capacitor lives of the inverter will be shorter.
♦ Parameters referred to ♦
Pr. 261 Power failure stop selection Refer to page 130

Mitsubishi Electric F700 Specifications

General

Brand	Mitsubishi Electric
Model	F700
Category	Inverter
Language	English