NORD Drivesystems BU0180 - Manual (Page 161)

9 Additional Information
BU 0180 GB-0914 Pre-series version 161
9.3 Electromagnetic compatibility (EMC)
9.3.1 General Provisions
As of July 2007, all electrical equipment which has an intrinsic, independent function and which is sold as an
individual unit for end users, must comply with Directive 2004/108/EEC (formerly Directive EEC/89/336).
There are three different ways for manufacturers to display compliance with this directive:
1. EC declaration of conformity
This is a declaration from the manufacturer, stating that the requirements in the applicable European standards for
the electrical environment of the equipment have been met. Only those standards which are published in the Official
Journal of the European Community may be cited in the manufacturer’s declaration.
2. Technical documentation
Technical documentation can be produced which describes the EMC characteristics of the device. This
documentation must be aut
horised by one of the “Responsible bodies” named by the responsible European
government. This makes it possible to use standards which are still in preparation.
3. EC Type test certificate
This method only applies to radio transmitter equipment.
The frequency inverters only have an intrinsic function when they are connected to other equipment (e.g. to
a motor). The basic units cannot therefore carry the CE mark which would confirm compliance with the EMC
directive. Precise details are therefore given below about the EMC behaviour of this product, based on the
proviso that it is installed according to the guidelines and instructions described in this documentation.
The manufacturer can certify that his equipment meets the requirements of the EMC directive for industrial
environments with respect to their EMC behaviour in the relevant environment. The relevant limit values
correspond to the basic standards EN 61000-6-2 and EN 61000-6-4 for interference immunity and
interference emissions.
9.3.2 Assessment of EMC
Two standards must be observed for the assessment of electromagnetic compatibility.
1. EN 55011 (environmental standard)
In this standard the limiting values are defined depending on the specified environment in which the product
is to be operated. A differentiation is made between 2 environments, whereby the 1st environment
describes the non-industrial domestic and commercial area without its own high or medium voltage
distribution transformers. The 2nd environment describes industrial areas, which are not connected to the
public low voltage mains, but rather have their own high or medium voltage distribution transformers.
A subdivision of the limiting values is made according to Classes A1, A2 and B.
2. EN 61800-3 (Product standard)
This standard defines the limiting values depending of the field of use of the product. The subdivision of the
limiting values is made according to Categories C1, C2, C3 and C4, whereby Class C4 only applies for
drive systems with high voltages (> 1000 V AC, > 400 A).
The same limiting values apply for both standards. However, the standards differ by an extended
application in the product standard. The manufacturer decides which of the two standards are used,
whereby in the case of suppression of interference, the environmental standard is typically used.