RoHS Compliant Metering Transformers
What is RoHS ?
The RoHS Directive is a standard that restricts the use of environmentally hazardous materials in electrical and electronic components and systems. Under this Restrictions on Hazardous Substances (RoHS) Directive, hundreds of thousands of products currently produced and marketed by the industry are becoming obsolete. It mandates that manufacturers of electrical and electronic components must determine what products they have to re-design to remove certain toxic materials. Components that are not in compliance and systems that includes such components cannot be sold into European Union countries. Countries that are members of the European Union must ensure that, new electrical and electronic equipments put on the market do not contain the listed hazardous materials of lead ("lead free"), cadmium, mercury, hexavalent chromium, polybrominated biphenyls (PBB) or polybrominated diphenyl ethers (PBDE.
AYA Instruments is now offering an extensive line of metering current transformers that are RoHS compliant. They do not contain the hazardous materials listed in the RoHS Directive.
AYA offers both Closed-Core and Split-Core metering current transformers with models that meet UL/CSA, ANSI Standards. They are available in either Commercial Class for use with Ammeters or ANSI and IEC Metering Class for use with current meters, WATT Meters, VAR Meters and relays where higher accuracy is required. The RoHS Compliant transformers are GREEN in color as well as in structure.
The 25 counties of the European Union, including its 10 new Eastern European member countries, Japan and China, are in the process of implementing the RoHS standard to restrict the use of environmentally hazardous materials in electrical and electronic components and systems. This will have a considerable impact on equipment manufacturers and distributors doing business internationally who will have to comply with these new directives.
Contact AYA Instruments to obtain additional information about the RoHS compliant metering transformers.
The AYA line of RoHS compliant metering current transformers is very extensive. Most models are available with either voltage or current output signals having full scales ranging from 1 Ampere to 8,000 Amperes. They are designed for use in electrical substations, in power monitoring with analyzers, recorders, loggers and multimeters in applications requiring continuous measurement of currents in electric circuits. Such requirements are common in monitoring power quality and loads by utilities, electric equipment manufacturers and heavy equipment operators that are required to monitor currents in the power lines.
WHAT ARE CURRENT TRANSFORMERS?
An AC current transformer is a special transformer that does not have a primary coil. The conductor whose current is to be measured acts as the primary coil when it is placed inside the magnetic path of the core. A Split-Core Current Transformer is a special type of current transformer. It enables the user to "open" the magnetic path in order to snap the transformer clamp around a conductor for performing accurate current measurements without having to interrupt the current flow in the conductor.
The signal obtained from an AC current transformer has the same waveshape as the current being measured. However, current transformers introduce measurement errors of amplitude, phase and waveshape due to frequency range limitations. The AYA clamps are designed to provide the lowest possible errors by using the highest quality magnetic core and the state-of-the-art technology.
