Avoiding Overvoltage Tripping; Overvoltage Limit Operation - Toshiba TOSVERT VF-S9 Instruction Manual

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.
Inverter rated
output capacity

6.12.5 Avoiding overvoltage tripping

6
• Function
Output
frequency
DC voltage
[Parameter setting]
Title
Resistance of
(kW)
standard option
0.2
200Ω
0.4
200Ω
0.75
200Ω
1.5
75Ω
2.2
75Ω
3.7
40Ω
5.5
20Ω
7.5
15Ω
11
10Ω
15
7.5Ω

: Overvoltage limit operation

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.
Overvoltage limiting level
Function
Overvoltage limit operation
200V class
Minimum allowable
resistance
63Ω
63Ω
42Ω
30Ω
30Ω
24Ω
10Ω
10Ω
7Ω
7Ω
Overvoltage limiting level
Adjustment range
0: Enabled
1: Prohibited
F-30
E6580757
400V class
Resistance of Minimum allowable
standard option resistance
- -
- -
200Ω 99Ω
200Ω 99Ω
200Ω 73Ω
160Ω 73Ω
80Ω 44Ω
60Ω 44Ω
40Ω 22Ω
30Ω 22Ω
Default setting
0