Using The Power Supply Exceeding 480V - Mitsubishi Electric FR-A820-00046 Instruction Manual

Parameters
5.7.11

Using the power supply exceeding 480V

To input a voltage between 480 V and 500 V to the 400 V class inverter, change the voltage protection
level.
Pr.
977
E302
● To use a voltage between 480 V and 500 V, set Pr. 977 "Input voltage mode selection" = "1". The
setting is applied after a reset.
● Setting Pr. 977 = "1" will change the voltage protection level to the one for the 500 V class.
● The increased magnetic excitation deceleration level is changed to 740 V. (Use Pr. 660 "Increased
magnetic excitation deceleration operation selection" to select the increased magnetic excitation
deceleration.)
NOTES Stand-alone options (except line noise filter) cannot be used when inputting a voltage between
480 and 500 V.
The voltage protection level of the 200 V class inverters is not affected by the Pr. 977 setting.
Parameters referred to
Pr. 660
5.7.12 Parameter write selection
Whether to enable the writing to various parameters or not can be selected. Use this function to pre-
vent parameter values from being rewritten by misoperation.
Pr.
77
E400
Pr. 77 can be set at any time regardless of the operation mode or operation status. (Setting through
communication is unavailable.)
FR-A800
Name
Input voltage mode selection
Increased magnetic excitation deceleration operation
selection
Name
Parameter write selection
(E) Environment setting parameters
Initial value Setting range Description
0
0
1
Initial value Setting range
0
1
0
2
400 V class voltage protection level
500 V class voltage protection level
=> page 5-689
Description
Writing is enabled only during stop.
Parameter writing is disabled.
Parameter writing is enabled in any
operation mode regardless of the
operation status.
5 - 203