Morgan Advanced Materials, a world leader in the design and manufacturing of innovative material solutions, is extending its electro ceramics portfolio, with the launch of a new range of single rod live-line capacitor assemblies for use on system voltages up to 36kV.
The new range is constructed from ceramic dielectricThe insulating material between the plates of the capacitor. The material is chosen for its ability to permit electrostatic attraction and repulsion to take place across it. The material will have the property that energy required to establish an electric field is recoverable in whole or in part, as electric energy. In other words, a good dielectric material is a poor conductor of electricity while being an effective supporter of electrostatic fields. materials that exhibit a high AC breakdownA disruptive discharge through insulation. If plain dielectricThe insulating material between the plates of the capacitor. The material is chosen for its ability to permit electrostatic attraction and repulsion to take place across it. The material will have the property that energy required to establish an electric field is recoverable in whole or in part, as electric energy. In other words, a good dielectric material is a poor conductor of electricity while being an effective supporter of electrostatic fields. films are used, this is usually catastrophic. If metallized films are used, self-healing should maintain the capacitor's integrity. strength, enabling them to operate continuously on a 36kV system line, and a negligible change of capacitanceThat property of a system of conductors and dielectrics which permits the storage of electricity when potential difference exists between the conductors. Its value is expressed as the ratio of a quantity of electricity to a potential difference. A capacitance value is always positive. with applied voltage. They also offer a significant volumetric efficiency saving over designs where two rods are connected in series to meet voltage testtest is test requirements.
Live-line capacitors are built into capacitor divider circuits which are connected to medium system voltage lines where they are used to sense the presence of voltage. The signal derived from the low voltage side of the capacitor divider can also be used to monitor supply failure and circuit conditions.
Building on the success of Morgan's 24kV system capacitors the new range complies with all qualification and routine production tests as detailed in IEC60358. These include a power frequencyThe number of complete cycles or vibrations per unit of time. Rate of alternation in an AC current. Expressed in cycles per second or hertz (Hz). testtest is test to 70 kV RMS/min, the ability to withstand a lightning impulse of 170kVpeak and partial dischargeA partial discharge is an electric discharge that only partially bridges the insulation between conductors when the voltage stress exceeds a critical value. Partial discharges may, or may not, occur adjacent to a conductor. Partial discharge is often referred to as corona but the term corona is preferably reserved for localized discharges in cases around a conductor, bare or insulated, remote from any other solid insulation. capability of less than 5pC at 40 kV RMS.
The range boasts a capacitanceThat property of a system of conductors and dielectrics which permits the storage of electricity when potential difference exists between the conductors. Its value is expressed as the ratio of a quantity of electricity to a potential difference. A capacitance value is always positive. range of 15pF – 80pF with dimensions (including two brass terminals) 17mm diameter x 81mm in length.
Dave Edwards, HV&RF technical manager for Morgan Advanced Materials, said: "Morgan has manufactured live-line capacitors since the early 1990s.? Over the years the capacitanceThat property of a system of conductors and dielectrics which permits the storage of electricity when potential difference exists between the conductors. Its value is expressed as the ratio of a quantity of electricity to a potential difference. A capacitance value is always positive. range has been extended by the introduction of new dielectricThe insulating material between the plates of the capacitor. The material is chosen for its ability to permit electrostatic attraction and repulsion to take place across it. The material will have the property that energy required to establish an electric field is recoverable in whole or in part, as electric energy. In other words, a good dielectric material is a poor conductor of electricity while being an effective supporter of electrostatic fields. materials. This latest extension of the range has been made possible by increasing the breakdownA disruptive discharge through insulation. If plain dielectricThe insulating material between the plates of the capacitor. The material is chosen for its ability to permit electrostatic attraction and repulsion to take place across it. The material will have the property that energy required to establish an electric field is recoverable in whole or in part, as electric energy. In other words, a good dielectric material is a poor conductor of electricity while being an effective supporter of electrostatic fields. films are used, this is usually catastrophic. If metallized films are used, self-healing should maintain the capacitor's integrity. strength of selected materials and will offer design engineers significant cost and space savings over current designs. Our capabilities also allow us to offer customised solutions for both live-line applications and power line couplingSituation where two circuits are connected together where only the AC voltage is passed. communication (PLCC) capacitors."