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Conduct Research Top

  • Current Transformer Measurements
    The Current Transformer (CT) is used to sense AC current in single-phase or three-phase mains circuits. The CT typically has a 1A or 5A AC secondary that connects to a current, power or energy meter. This allows the meter to be located away from the mains wiring. CTs are available in a variety
  • Using the ECOLEC Series 100 Meters as a CT Operated Meter (.pdf)
    The ECOLEC Series 100 meters are specified as direct connected meters. They can however, in conjunction with external Current Transformers (CT's), be used as CT operated meters. The use of external CT's enables the meter to measure load currents well in excess of the meter's maximum current rating
  • Current Transformer Application Note and Wire Length Chart
    Current transfomers are specified by size (VA rating), ratio and accuracy. The VA rating determines the maximum secondary impedance. (lead+terminal+meter impedance) that can be driven at the stated accuracy. Metering CTs are specified for a 0.9 power factor at 60Hz. Relaying CTs are specified
  • The Good Old Power Resistors
    of high-voltage power transformers could put you to sleep. If a current needed "tweaking" you looked at a 3-inch panel meter, and took control with a knob you could get your whole fist around!
  • Using Infrared Techniques for the Condition Assessment of Isolated Phase Bus Duct (.pdf)
    The normal application of isolated phase bus duct is to make the connection between large generators and its associated generator step up transformer. The bus also is used to make connections to auxiliary, reserve auxiliary, potential, and excitation transformers, the purposes of which, are used
  • Monitoring Higher Voltages
    Some building electrical systems just will not cooperate when it comes time to monitor power. You search and search and cannot find a point to monitor power on the low voltage side of the transformer (below 600 volts). Now you must face the fact that only the high voltage side can be used for power
  • Exploring the Benefits of New Hipot Testing Technology (.pdf)
    Like many industries reliant upon technology, the electrical test and measurement field has progressed in leaps and bounds since its early days. Safety testing equipment is no different; Hipot testers have progressed far beyond the "transformer-in-a-box" design of the 1950's. These older models
  • The `Good Old` Power Days (.pdf)
    of high-voltage power transformers could put you to sleep. If a current needed "tweaking" you looked at a 3-inch panel meter, and took control with a knob you could get your whole fist around!. Power resistors were big wirewound guys. They had hollow cores and were covered with shiny brown enamel
  • A Microfluidic System for Biological Particle Enrichment Using Contactless Dielectrophoresis
    of the buffer was. 130 mS/cm and was measured with a Mettler-Toledo SevenGo. pro conductivity meter (Mettler-Toledo, Inc., Columbus,. OH) to ensure that its conductivity was 130 ms/cm. These cells were observed to be spherical, with a diameter. of w13 mm when in suspension. Carboxylate-modified polystyrene
  • MSilica Nanoparticles Treated by Cold Atmospheric-Pressure Plasmas Improve the Dielectric Performance of Organic-Inorganic Nanocomposites
    . diameter beads that were carboxylate-modified polystyrene. microspheres (Invitrogen Molecular Probes, Eugene, OR,. USA) suspended in deionized water. The electrical conductivity. of the deionized water was determined using a MettlerToledo. SevenGo Pro conductivity meter (Mettler-Toledo,. Columbus, OH