Toshiba TOSVERT VF-MB1 Instruction Manual page 41

 Ground must be connected securely.
Be Grounded
 Do not attach devices with built-in capacitors (such as noise filters or surge absorber) to the output
2
Prohibited
Preventing radio noise
To prevent electrical interference such as radio noise, separately bundle wires to the main circuit's power
terminals (3-phase models: R/L1, S/L2, T/L3, single-phase models: R/L1, S/L2/N) and wires to the motor
terminals (U/T1, V/T2, W/T3).
Control and main power supply
The control power supply and the main circuit power supply for this inverter are the same.
If a malfunction or trip causes the main circuit to be shut off, control power will also be shut off. When
checking the cause of the malfunction or the trip, use the trip holding retention selection parameter.
In addition, please use an optional control power supply backup unit when only control power supply
operates, even if the main circuit is shut off due to trouble or tripping.
Wiring
 Because the space between the main circuit terminals is small, use sleeved crimp-style terminals for the
 For ground terminal
 For the sizes of electric wires used in the main circuit, refer to the table in section 10.1.
 The length of the main circuit wire in table 10.1 should be no longer than 30 meters. If the wire is longer
If the ground is not securely connected, it could lead to electric shock or fire.
(motor side) terminal.
This could cause a fire.
connections. Connect the terminals so that adjacent terminals do not touch each other.
use wires of the size that is equivalent to or larger than those given in table 10.1
and always ground the inverter (240V voltage class: D type ground, 500V voltage class: C type ground).
Use as large and short a ground wire as possible and wire it as close as possible to the inverter.
than 30 meters, the wire size (diameter) must be increased.
Warning
Caution
B-2
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