TD350 Series VFD Optional peripheral accessories
-345-
Accessory for signal transmission
Device for electric shock prevention and protection
against short-to-ground that may cause current leakage
and fire. Select residual-current circuit breakers
(RCCBs) that are applicable to VFDs and can restrict
high-order harmonics, and of which the rated sensitive
current for one VFD is larger than 30 mA.
Accessories used to improve the current adjustment
coefficient on the input side of the VFD, and thus restrict
high-order harmonic currents.
The VFDs of 220V (18.5–55kW), 460V (≥37kW) and
575V can be connected to external DC reactors.
Accessory that restricts the electromagnetic
interference generated by the VFD and transmitted to
the public grid through the power cable. Try to install the
input filter near the input terminal side of the VFD.
Brake unit or
brake resistor
Accessories used to consume the regenerative energy
of the motor to reduce the deceleration time.
The VFDs of 220V (≤15kW), 460V (≤30kW), and and
575V (≤18.5kW) need only brake resistors and the
VFDs of 220V (18.5–55kW), 460V (≥37kW) and 575V
(≥22kW) need brake units.
Accessory used to restrict interference generated in the
wiring area on the output side of the VFD. Try to install
the output filter near the output terminal side of the VFD.
Accessory used to lengthen the valid transmission
distance of the VFD, which effectively restrict the
transient high voltage generated during the switch-on
and switch-off of the IGBT module of the VFD.
D.3 Power supply
Refer to the electrical installation.
Ensure that the voltage class of the VFD is consistent with that of the grid.
D.4 Cables
D.4.1 Power cables
The sizes of the input power cables and motor cables must meet the local regulation.
The input power cables and motor cables must be able to carry the corresponding load currents.
The maximum temperature margin of the motor cables in continuous operation cannot be lower
than 70°C.
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