AMETEK MX CTSH - Manual (Page 15)

California Instruments Revision H 15
User Manual MX Series CTSH Compliance Test System
2. IEC Testing
2.1 About This Chapter
This chapter provides some background information on the various IEC test standards that apply to AC
powered products. It also reviews some of the test equipment requirements that are important when testing
for IEC compliance. Note that this information is subject to change as IEC standards change over time. This
overview is by no means comprehensive and is only provided for reference. If the reader is not familiar with
IEC test requirements for AC powered products, we strongly recommend consulting information on this
subject that is available through other sources. References are provided at the end of this chapter.
The standards covered in this chapter include those, which the CTS system is capable of testing,
specifically:
•
IEC 61000-3-12 Harmonics
•
IEC 61000-3-11 Flicker
•
EN 61000-4-11p Voltage Dips and Variations (pre-compliance, requires option –411 on MX)
•
EN 61000-4-13 Interharmonics and Harmonics Immunity Test (requires option –413 on MX)
•
EN 61000-4-14 Voltage Fluctuations
•
EN 61000-4-17 DC Ripple
•
EN 61000-4-27p AC Voltage Unbalance (pre-compliance)
•
EN 61000-4-28 Frequency Variations
•
EN 61000-4-29p DC Voltage Dips and Variations (pre-compliance)
2.2 The EMC Directive
As the world population grows and the overall energy consumption increases, industrialized nations have
become increasingly concerned with the future availability of energy. Reducing energy consumption by
using more energy efficient lighting and motor drive systems is one approach being taken by European, US
and Japanese governments. The need of more efficient electrical systems however typically requires the
use of sophisticated semi-conductor based electronic circuits that produce current harmonics. This in turn
effects power quality which is an increasing problem on public utility networks. As lighting systems with
electronic ballasts and equipment with switching power supplies such as computers, TV’s, fax machines
and printers proliferate, power quality deteriorates. The same is true for PWM controller motor drives. The
International Electrical Committee (IEC) has released standards dealing with the low frequency public
supply system. Initial standards were 555.2 (Harmonics) and 555.3 (Flicker) which have since been refined
and are now available as IEC 61000-3-2 and IEC 61000-3-3 respectively. Effective January 1, 1996, most
electrical devices sold within the member countries of the European Union (EU) must meet these standards
as governed by the EMC directive.
Recently, a higher power version of IEC 61000-3-3 called IEC 61000-3-11 was released to cover testing of
EUT's up to 75 A per phase. A similar harmonics standard IEC 61000-3-12 is in the works but has not
been released at the time of this manual's release.