Toshiba TOSVERT VF-S11 - Avoiding Overvoltage Tripping; Overvoltage Limit Operation; Overvoltage Stall Protection Level

E6581158
F-41
6
3) Minimum resistances of connectable braking resistors
The minimum allowable resistance values of the externally connectable braking resistors are listed in the
table below.
Do not connect braking resistors with smaller resultant resistances than the listed minimum allowable
resistance 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 55Ω
--
0.4
200Ω 55Ω 200Ω 114Ω
0.55
200Ω 55Ω
--
0.75
200Ω 55Ω 200Ω 114Ω
1.5
75Ω 44Ω 200Ω 67Ω
2.2
75Ω 33Ω 200Ω 67Ω
3.7
40Ω 16Ω 160Ω 54Ω
5.5
20Ω 12Ω 80Ω 43Ω
7.5
15Ω 12Ω 60Ω 28Ω
11
10Ω 5Ω 40Ω 16Ω
15
7.5Ω 5Ω 30Ω 16Ω
6.13.5 Avoiding overvoltage tripping
H : Overvoltage limit operation
H
: Overvoltage stall protection level
• Function
These parameters are used to keep the output frequency constant or increase it to prevent overvolt-
age tripping in case the voltage in the DC section rises during deceleration or varying speed opera-
tion. The deceleration time during overvoltage limit operation may increase above the designated
time.
Overvoltage limit operation level
DC Voltage
Output
Frequency

H

  Over-voltage stall protection level