Siemens micromaster 410, Operating Instructions Manual, Page: 26 / 84

2 Installation Issue 04/02
MICROMASTER 410 Operating Instructions
26
6SE6400-5EA00-0BP0
2.8 Electrical Installation
WARNING
THIS EQUIPMENT MUST BE GROUNDED.
♦
To ensure the safe operation of the equipment, it must be installed and
commissioned by qualified personnel in full compliance with the warnings laid
down in these operating instructions.
♦
Take particular note of the general and regional installation and safety regu-
lations regarding work on dangerous voltage installations (e.g. EN 50178), as
well as the relevant regulations regarding the correct use of tools and
personal protective gear.
♦ The mains input, DC and motor terminals, can carry dangerous voltages even
if the inverter is inoperative; wait 5 minutes to allow the unit to discharge after
switching off before carrying out any installation work.
♦ The inverters can be installed in a side-by-side configuration with a minimum
distance of 30 mm (1.18 inches) between units and a distance of 100 mm
(3.94 inches) must be maintained if the inverters are installed on top of each
other.
CAUTION
The control, power supply and motor leads must be laid separately. Do not feed
them through the same cable conduit/trunking. Never use high voltage insulation
test equipment on cables connected to the inverter.
2.8.1 General
WARNING
The inverter must always be grounded
.
If the inverter is not grounded correctly, extremely dangerous conditions may
arise within the inverter, which could prove potentially fatal.
Operation with ungrounded (IT) supplies
The MICROMASTER will operate from ungrounded supplies and will continue to
operate if an output phase is shorted to ground.
On ungrounded supplies, it will be necessary to cut the ‘Y’ capacitor link from the
inside of the unit. The procedure for removing this capacitor is described on page
28 (Figure 2-7) of this manual.