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(7) Inverter ground terminal
To ensure safety and noise reduction, always ground the inverter ground terminal. Also, metal frames of
electrical equipment must be grounded as specified in the Electric Facility Technical Standard.
The connection procedure is as follows:
① Ground metal frames to a ground terminal (Ground resistance:10Ω or less).
② Use a suitable cable (short and thick) to connect the inverter system to the ground terminal.
(8) Auxiliary power switching connector (CN UX) (for inverter of 40HP or more)
When an inverter of 40HP or more requires a main circuit power voltage as listed in Table 2-3-2, disconnect
auxiliary power switching connector CN UX from U1 and connect to U2. For the switching method, see Fig.
2-3-11.
Table 2-3-2 Main circuit power voltage requiring auxiliary power switching connector switching
Frequency [Hz] Power voltage range [VAC]
50 380-398
60 380-430
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CAUTION
• Check that the number of phases and rated voltage of this product match
those
of the AC power supply.
•
Do not connect the AC power supply to the output terminals (U, V, W).
Injury may result.
•
Do not connect a braking resistor directly to the DC terminals (P[+] and N[-]).
Fire may result.
(9) Fan power switching connector (CN RXTX) (for inverter of 40HP or more)
G11S without options supports DC power input via DC common connection by connecting the power
regeneration converter (RHC series) as shown in Fig. 2-3-10.
For details, refer to technical documentation.
The inverter of 40HP or more contains an AC-powered component (e.g., AC cooling fan).
To use the inverter using DC power input, switch the fan power switching connector (CN RTXT) inside the
inverter to the R0-T0 side and provide AC power to the R0 and T0 terminals. (See Fig. 2-3-9.)
For the switching method, see Fig. 2-3-11.
Note:
In the standard state, the fan power switching connector (CN RXTX) is connected to the L1/R-L3/T side.
When DC power input is not used, do not switch this connector.
The same AC voltage as the main circuit power voltage must be supplied to the auxiliary control-power input terminals
(R0 and T0). If not supplied, the fan does not rotate and the inverter will overheat (0H1).