2-13
h Main circuit power input terminals, L1/R, L2/S, and L3/T (for three-phase voltage input)
or L1/L and L2/N (for single-phase voltage input)
1) For safety, make sure that the molded case circuit breake
(MCCB) or magnetic contactor (MC) is turned off before
wiring the main circuit power input terminals.
2) Connect the main circuit power supply wires (L1/R, L2/S
and L3/T or L1/L and L2/N) to the input terminals of the
inverter via an MCCB or residual-current-operated
protective device (RCD)
earth leakage circuit breake
(ELCB)*, and MC if necessary.
It is not necessary to align phases of the power supply
wires and the input terminals of the inverter with each
other.
* With overcurrent protection
Figure 2.10 Main Circuit Power Input
Terminal Connection
It is recommended that a magnetic contactor be
inserted that can be manually activated. This is to
allow you to disconnect the inverter from the powe
supply in an emergency (e.g., when the protective
function is activated) so as to prevent a failure o
accident from causing the secondary problems.
2.3.6 Replacing the main circuit terminal block (TB) cover
1) As shown in Figure 2.11, pull out the wires from the main circuit terminals in parallel.
2) Hold both sides of the main circuit TB cover between thumb and forefinger and slide it back
into place. Pull the wires out through the grooves of the main circuit TB cover.
Replace the main circuit TB cover, taking care not to apply any stress to the wires. Applying
stress to the wires will impose a mechanical force on the screws on the main circuit
terminals, which may loosen the screws.
Figure 2.11 Putting Back the Main Circuit Terminal Block (TB) Cover
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