Avoiding Overvoltage Tripping - Toshiba TOSVERT VF-S11 Instruction Manual

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.
Inverter rated
output capacity
Note: Be sure to set f308 (Dynamic braking resistance) at the resistance of the dynamic braking resistor
6

6.13.5 Avoiding overvoltage tripping

• Function
Overvoltage limit operation level
Output
Frequency
DC Voltage
[240V Class]
Resistance
of standard
(kW)
option
0.2 200Ω
0.4
200Ω
0.55
200Ω
0.75
200Ω
1.5
75Ω
2.2
75Ω
4.0
40Ω
5.5
20Ω
7.5
15Ω
11
10Ω
15
7.5Ω
connected.
: Overvoltage limit operation
: Overvoltage stall protection level
These parameters are used to keep the output frequency constant or increase it to prevent
overvoltage tripping in case the voltage in the DC section rises during deceleration or varying speed
operation. The deceleration time during overvoltage limit operation may increase above the
designated time.
[500V Class]
Minimum Resistance
allowable of standard
resistance option
55Ω -
55Ω 200Ω
-
55Ω
55Ω 200Ω
44Ω 200Ω
33Ω 200Ω
16Ω 160Ω
12Ω 80Ω
12Ω 60Ω
5Ω 40Ω
5Ω 30Ω
: Over-voltage stall protection level
F-42
[600V Class]
Minimum Resistance
allowable of standard
resistance option
- -
-
114Ω
- -
114Ω 2850Ω
67Ω 1450Ω
67Ω 950Ω
54Ω 480Ω
43Ω 290Ω
28Ω 190Ω
16Ω 140Ω
16Ω 115Ω
E6581158
Minimum
allowable
resistance
-
-
-
115Ω
68Ω
68Ω
54Ω
44Ω
28Ω
16Ω
16Ω