Issue 04/02 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 supply before making or changing connections to
the unit.
♦ Ensure that the inverter is configured 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 connected to a 115 V supply.
♦ When synchronous motors are connected or when connecting several motors
in parallel, the inverter must be operated with voltage/frequency control
characteristic (P1300 = 0, 2 or 3).
NOTICE
♦ Ensure that the appropriate circuit-breakers/fuses with the specified current
rating are connected between the power supply and inverter (see Tables
starting on page 63).
♦ Use Class 1 60/75
o
C copper wire only (16 AWG minimum for UL
compliance). For 115 V units use class 1 75 °C copper wire only. For
tightening torque see Table 7-2 on page 64.
♦ To tighten up the power terminal screws use a 4 - 5 mm cross-tip screwdriver.
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