Toshiba TOSVERT VF-S15 Series Instruction Manual Supplementary page 5

2) Grounding capacitor switch
Three-phase 500V model have a built-in high-attenuation noise filter and is grounded via a capacitor.
A switch screw makes for easy switching to reduce leakage current from the inverter and the load on the
capacitor. However, be careful, as reducing the load means non-conformity with the EMC standard on
the inverter itself. Always do switching with the power off.
Grounding
capacitor
switch
position
A ( )
Grounding
capacitor
switch
position
B ( )
Note 1) Figure is VFS15-4022PL1-W1 to 4037PL1-W1.
1.4.4 Installation
Calorific values of the inverter and the required ventilation
About 5% of the rated power of the inverter will be lost as a result of conversion from AC to DC or from DC
to AC. In order to suppress the rise in temperature inside the cabinet when this loss becomes heat loss, the
interior of the cabinet must be ventilated and cooled.
The amount of forcible air-cooling ventilation required and the necessary heat discharge surface quantity
when operating in a sealed cabinet according to motor capacity are as follows.
Voltage class Inverter type
Three-phase
VFS15-
500V class
Note 1) Case of 100% Load Continuation operation. The heat loss for the optional external devices
(input AC reactor, radio noise reduction filters, etc.) is not included in the calorific values in the table
Note 2) It is power consumption when power is on but is not output (0Hz), and cooling fan is activated (model
with cooling fan).
Install the screw at grounding capacitor switch position A ( ), the
grounding capacitor's capacity from small to large. (Default setting)
Tightening torque： 0.5 N m (4.4 lb in)
Move the screw to grounding capacitor switch position B ( ), the
grounding capacitor's capacity from large to small. This reduces the
leakage current.
When this inverter is connected to the IT system (insulated ground
of power supply or the system has Impedance), the screw has to be
moved as the figure shows.
Calorific values (W)
Note 1)
4kHz
4004PL1-W1 29
4007PL1-W1 40
4015PL1-W1 62
4022PL1-W1 77
4037PL1-W1 113
Amount of forcible air
cooling ventilation
3
required (m /min)
12kHz 4kHz 12kHz
39 0.17 0.22
54 0.23 0.30
88 0.35 0.50
108 0.44 0.61
169 0.64 0.96
5
Heat discharge
Standby
surface area
power
required for sealed
requirement
3
storage cabinet (m )
Note 2)
4kHz 12kHz
0.59 0.79
0.79 1.07
1.24 1.76
1.54 2.16
2.26 3.38
E6582185
(W)
17
17
17
19
19