Omron H3CR-A Manual page 13

2. TÜV (Technischer
Überwachungs - - Verein)
3. BEAB (British Electrotechnical
Approvals Board)
4. Switches and Relays Rated for
Televisions (UL, CSA)
5. Types of Loads
EMC
Directive 89/336/EEC Concerning Electromag-
netic Compatibility
The EMC Directive is a new-approach directive laying down equip-
ment protection requirements and leaving it to standards, primarily
harmonized standards or, failing that, national standards, to define
product characteristics.
The EMC Directive is a total harmonization directive, i.e., its provi-
sions replace the national provisions concerned.
The EMC Directive must be transposed into national law by 1st July
1991. Its provisions have applied since 1st January 1992.
The wide scope of the EMC Directive has demonstrated the overrid-
ing need to provide for a transitional period, so as to ensure a har-
monious changeover from the application of systems of a purely na-
tional character to an exclusive Community system.
That is why, on 28 April 1992, the Council adopted Directive
92/31/EEC with a view to allowing a transitional period until 31 De-
cember 1995.
During this transitional period, a manufacturer will have the choice
of placing on the market/putting into service:
The TÜV organizations are private, non-profit organizations whose parent organization, the German
Boilermaker's Federation, was founded in 1875 to prevent boiler accidents. There are 14 indepen-
dent TÜV organizations within Germany (such as TÜV Rheinland, TÜV Bayern, etc.).
The TÜV organizations inspect a broad range of industrial machinery and equipment, but is also en-
trusted by the government to inspect and approve electrical products based on the VDE standards.
TÜV approval is equally valid as VDE approval, and TÜV approval by any of the 14 independent
organizations is valid with the others.
There are two types of approval marks, the mark on the upper-left is applied to equipment and the
mark on the lower-left is applied to parts within the equipment.
This non-profit organization was established in 1960 and tests mainly household electrical ap-
pliances based on BS standards.
There are two types of BEAB approval marks, the mark on the left is applied to equipment and the
mark on the right is applied to parts within the equipment. Application of the parts approval mark is
optional.
Both UL and CSA require normal TV rating approval for switches and relays used for power supply
switching in appliances such as televisions and radios. UL accepts tungsten ratings (25,000 switch
operations) for relays.
The TV ratings test is performed using a normal tungsten load on 6 samples. The tungsten lamp load
has a inrush current about 10 times the normal current and the switching test is performed 25,000
times on each sample.
The TV ratings display indicates the tested amperage. For example, a switch passing the test for a
normal current of 2 A (at 120 VAC) would be indicated by "TV--2".
The conditions for loads other than resistive loads are different for the North American standards (UL
and CSA) and the standards for each European country (VDE, SEMKO, etc.).
In North America, the tests for loads other than resistive loads are normally performed with a "general
purpose load" with a 0.75 to 0.80 power factor, but in European countries the tests are performed with
an inductive load with a 0.4 power factor.
#
Products manufactured in accordance with the EMC Directive,
whereby the free movement of the product is guaranteed
pursuant to the Directive, or
#
Products manufactured in accordance with national regulations
or possibly with technical specifications of a non-mandatory
nature, whereby free movement of the product will be
guaranteed pursuant to Article 30 of the EEC Treaty, albeit
subject to the possible derogations provided for in Article 36 and
the jurisprudence of the European Community Court of Justice.
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