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!
Warnings
Work on the device/system by unqualified personnel or failure to comply with
warnings can result in severe personal injury or serious damage to material. Only
suitably qualified personnel trained in the setup, installation, commissioning and
operation of the product should carry out work on the device/system.
Only permanently-wired input power connections are allowed. This equipment must
be grounded (IEC 536 Class 1, NEC and other applicable standards).
If a Residual Current-operated protective Device (RCD) is to be used, it must be an
RCD type B.
Machines with a three-phase power supply, fitted with EMC filters, must not be
connected to a supply via an ELCB (Earth Leakage Circuit-Breaker EN50178
Section 5.2.11.1).
The following terminals can carry dangerous voltages even if the inverter is
inoperative:
- the power supply terminals L/L1, N/L2, L3.
- the motor terminals U, V, W, DC+, DC-
Always wait 5 minutes to allow the unit to discharge after switching off before
carrying out any installation work.
This equipment must not be used as an 'emergency stop mechanism' (see EN
60204, 9.2.5.4)
The minimum size of the earth bonding conductor must be equal to or greater than
the cross-section of the power supply cables.
!
Caution
The connection of power, motor and control cables to the inverter must be carried out
as shown in Figure 2-4 on page 25, to prevent inductive and capacitive interference
from affecting the correct functioning of the inverter.
2.1

General

Installation after a Period of Storage
Following a prolonged period of storage, you must reform the capacitors in the inverter.
The requirements are listed below.
Period of Storage
1 year or less
1 to 2 years
2 to 3 years
3 years and over
18
Required Action
No reforming required
Apply power to the inverter for one hour before issuing
the run command
Use a variable AC supply
Apply 25% of input voltage for 30 minutes
Increase volts to 50% for a further 30 minutes
Increase volts to 75% for a further 30 minutes
Increase volts to 100% for a further 30 minutes
Inverter ready for run signal
Use a variable AC supply
Apply 25% of input voltage for 2 hours
Increase volts to 50% for a further 2 hours
Increase volts to 75% for a further 2 hours
Increase volts to 100% for a further 2 hours
Inverter ready for run signal
2. INSTALLATION
Preparation Time
No preparation
1 hour
2 hours
8 hours
MICROMASTER 420 Operating Instructions
6SE6400-5AA00-0BP0

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