SD700FL SERIES
POWER ELECTRONICS
36
POWER CONNECTION
6.5.
EMC Installation Requirements
6.5.1.
Introduction
The European EMC Directive defines electromagnetic compatibility as follows: the capability of an
apparatus, an industrial plant, or a system to work satisfactorily in the electromagnetic
environment without at the same time causing electromagnetic disturbance, which would be
unacceptable to apparatus, industrial plant, or systems present in this environment.
The Electromagnetic compatibility (EMC) depends of two mains characteristics of the equipment:
the Electromagnetic Interference (EMI) and Electromagnetic Susceptibility (EMS). The EMC
standards aims to ensure that all the electrical equipment that could operate simultaneously in the
same environment are compatible. That means the interference immunity of all the devices is
greater than the interference emission of all the devices within the same environment.
The EMC requirements for Power Drive System (PDS) are defined in IEC/EN 61800-3 standard
that is included in the Declaration of conformity CE enclosed. In European Union, EN61800-3
standard takes precedence over all generic or previously applicable product family EMC
standards. The PDS in the context of this standard comprises the drive converter, the motor
cables and the motor. Therefore, the installer as the ultimate responsible must follow the
installation instructions given within this manual.
Depending on the location of the drive, the standards define four categories distributed in two
environments.
First Environment:
First Environment includes domestic premises. It also includes
establishments directly connected without an intermediate transformer to a low-voltage
power supply network, which supplies buildings used for domestic purposes such as
shopping malls, cinemas, hospitals…
Second environment
: Industrial use. Second Environment includes all establishments other
than those directly connected to a low-voltage power supply network, which supplies
buildings used for domestic purposes. E.g. factories and those other premises supplied by
their own dedicated transformer.
Figure 6.12 Environments definition
The two environments are divided in four categories C1 to C4 that are summarized in the
following table.
FIRST ENVIRONMENT
SECOND ENVIRONMENT
C1
C2
C3
C4
Restricted Installation [1]
NO
YES
YES
YES [2]
Notes
[1]. “Restricted Installation” means that the installation and commissioning must be carried out by
specialist personnel.
[2]. C4 category applies only for complex systems or when ratings are equal or above to 1,000 V
or 400 A. Instead of relying on emissions limits for compliance C4 devices are treated later on as
fixed installations that should only be assessed when installed in its intended location. Good
engineering practices
– as the recommended on the standard - should be applied ad hoc and
documented to form an EMC plan by the installation responsibles.
