Issue A1 2 Installation
MICROMASTER 410 Operating Instructions
6SE6400-5EA00-0BP0 27

Operation with Residual Current Device

If an RCD (also referred to as ELCB or RCCB) is fitted, the MICROMASTER
inverters will operate without nuisance tripping, provided that:
þ A type B RCD is used.
þ The trip limit of the RCD is 30 mA.
þ The neutral of the supply is grounded.
þ Only one inverter is supplied from each RCD.
þ The output cables are less than 30 m [98.43 ft](screened) or 50 m [164.04 ft]
(unscreened).

Operation with long cables

All inverters will operate at full specification with cable lengths up to 30 m [98.43 ft]
(screened) or 50 m [164.04 ft] (unscreened).
2.8.2 Power and motor connections
WARNING
♦ Isolate the mains electrical suppl y before making or changing connections to
the unit.
♦ Ensure that the inverter is config ured for the correct supply voltage:
single-phase 230 V MM410 MICROMASTERS must not be connected to a
higher voltage supply.
♦ The 115 V unit MUST only be connect ed to a 115 V supply.
♦ When synchronous motors are connecte d or when connecting several motors
in parallel, the inverter must be operated with voltage/frequenc y control
characteristic (P1300 = 0, 2 or 3).
NOTICE
♦ Ensure that the appropriate circuit-break ers/fuses with the specified current
rating are connected between the power supply and inverter (see Tables
starting on page 63).
♦ Use Class 1 60/75oC copper wire only (16 AWG minimum for UL
compliance). For tightening torque see Table 7-2 on page 64.
♦ To tighten up the power terminal scre ws use a 4 - 5 mm cross-tip screwdriver.