Baldor MotiFlex e100 Installation Manual - 3.4 Ac Power Connections
www.baldormotion.com
3-14 Basic Installation
MN1943
3.4 AC power connections
This section provides instructions for connecting the AC power supply. For full specifications,
see section 8.
The installer of this equipment is responsible for complying with NEC (National Electric Code)
guidelines or CE (Conformite Europeene) directives and application codes that govern wiring
protection, earthing/grounding, disconnects and other current protection.
Electrical shock can cause serious or fatal injury. Do not touch any power
device or electrical connection before you first ensure that power has been
disconnected and there is no high voltage present from this equipment or
other equipment to which it is connected.
To prevent equipment damage, be certain that the input power has correctly rated
protective devices installed.
To prevent equipment damage, be certain that input and output signals are powered
and referenced correctly.
To ensure reliable performance of this equipment be certain that all signals to/from
the MotiFlex e100 are shielded correctly.
MotiFlex e100 drives are designed to be powered from standard three-phase lines that are
electrically symmetrical with respect to earth/ground. The power supply module within all
MotiFlex e100 models provides rectification, smoothing and current surge protection. Fuses or
circuit breakers are required in the input lines for cable protection.
Note: A Residual Current Device (RCD) must not be used for fusing the drive.
An appropriate type of circuit breaker or fuse must be used.
All interconnection wires should be in metal conduits between the MotiFlex e100, AC power
source, motor, host controller and any operator interface stations.
3.4.1 Earthing / grounding
Permanent earth/ground bonding points are provided on the mounting flanges, which must be
used as the protective earth. They are labeled with the protective earth symbol and do not form
any other mechanical function. Earthing methods are shown in section 3.4.4.
These protective earth/ground points prevent exposed metal parts of the MicroFlex e100 from
becoming live in the event of a wiring error or other failure. Connecting these points to earth does
not provide protection against electromagnetic contamination received or emitted by the drive
and its associated wiring. For example, the motor power output cable supplies a high frequency
high current waveform to the motor, so the cable’s shielding must be separately bonded to a
functional earth point to prevent the cable radiating electromagnetic contamination into the
surrounding area. Such contamination can cause spurious errors in apparently unrelated parts
of the installation, such as low voltage communication cables. See sections 3.4.2 and 3.7.1 for
detailed installation instructions that will help reduce electromagnetic contamination.
Note: When using unearthed/ungrounded distribution systems, an isolation transformer
with an earthed/grounded secondary is recommended. This provides three-phase
AC power that is symmetrical with respect to earth/ground and can prevent
equipment damage.
DANGER
NOTICE
NOTICE
NOTICE