The following figure shows the external wiring of the VFD.
Note:
l The VFD models of 037G/045P and lower are equipped with built-in braking units, and those of 045G/055P–055G/075P can be configured with optional built-in braking units.
l The VFD models of 018G–110G/132P are equipped with built-in DC reactors.
l P1 terminals are equipped only for the VFD models of 132G/160P and higher, which enable the VFD models to be directly connected to external DC reactors.
l The braking units are INVT DBU series standard braking units. For details, see the DBU operation manual.
Image | Name | Description |
Cable | Accessory for signal transmission | |
Breaker | 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. | |
Input reactor | Accessories used to improve the current adjustment coefficient on the input side of the VFD, and thus restrict high-order harmonic currents. The VFD models of 132G/160P and higher can be directly connected to external DC reactors. | |
DC reactor | ||
Input filter | 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. | |
Braking unit or braking resistor | Accessories used to consume the regenerative energy of the motor to reduce the DEC time. The VFD models of 037G/045P and lower need only to be configured with braking resistors, those of 132G/160P and higher also need to be configured with braking units, and those of 045G/055P-055G/075P can be configured with optional built-in braking units. | |
Output filter | 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. | |
Output reactor | 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. |