Toshiba TOSVERT VF-S11 Instruction Manual page 223

Devices
Braking
External dimensions
resistor
Motor-end surge voltage
suppression filter l
MSF-4015Z
MSF-4037Z
MSF-4075Z
MSF-4150Z
Parameter Parameter writer type: PWU001Z
writer Cable type (1m): CAB0011
10
External dimensions and connections
4- 12 holes
Name plate
(Installation
dimension)
Wire opening
Measures to protect motors against surge voltages
In a system in which a 400V-class general-purpose motor is operated with a voltage PMW inverter
that uses an ultra high-speed switching device (such as an IGBT), surge voltages may be produced
and deteriorate the insulation of motor coils, depending on the cable length, wiring method, cable
constant, and so on. Here are some examples of measures against surge voltages.
(1) Use motors with a high dielectric strength.
(2) To suppress surge voltages, install an AC reactor (an input reactor may be used instead. For the
application, contact your Toshiba dealer) or a surge suppression filter on the output side of the
inverter.
Applicable motor (kW)
A
0.4 0.75 1.5 310
2.2 3.7 310
5.5 7.5 310
11 15 330
(3m): CAB0013
(5m): CAB0015
Connections
Power source
Dimensions (mm)
Terminal screw Grounding screw
B C D E F G
255 300 200 270 55 189
255 300 200 270 55 209
315 350 200 320 55 249
350 400 200 370 65 289
60.0
16.0
2.0
3.2
holes
9.0
15.9
8.0
1.0
13.2
J-12
E6581158
Motor-end surge voltage
suppression filter
Approx. weight
(kg)
M4 M4 12
M4 M4 20
M5 M5 30
M5 M5 40
2.0
30.0
3.2 holes
2.8
45
1.0