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E6580757
F-30
6
4) Minimum resistances of connectable braking resistors
The minimum allowable resistance values of the externally connectable braking resistors are listed in the ta-
ble below.
Do not connect braking resistors with smaller resultant resistances than the listed minimum allowable resis-
tance values.
200V class 400V class
Inverter rated
output capacity
(kW)
Resistance of
standard option
Minimum allowable
resistance
Resistance of
standard option
Minimum allowable
resistance
0.2
200Ω 63Ω
--
0.4
200Ω 63Ω
--
0.75
200Ω 42Ω 200Ω 99Ω
1.5
75Ω 30Ω 200Ω 99Ω
2.2
75Ω 30Ω 200Ω 73Ω
3.7
40Ω 24Ω 160Ω 73Ω
5.5
20Ω 10Ω 80Ω 44Ω
7.5
15Ω 10Ω 60Ω 44Ω
11
10Ω 7Ω 40Ω 22Ω
15
7.5Ω 7Ω 30Ω 22Ω
6.12.5 Avoiding overvoltage tripping
: Overvoltage limit operation
• Function
This parameter keeps the output frequency constant or increases the frequency to prevent overvolt-
age tripping due to increases in DC voltage during deceleration or constant-speed operation. The
deceleration time during overvoltage limit operation may increase above the designated time.
DC voltage
Overvoltage limiting level
Output
f
requency
Overvoltage limiting level
[Parameter setting]
Title Function Adjustment range Default setting
Overvoltage limit operation
0: Enabled
1: Prohibited
0