Full Automatic Dielectric Loss Tester

Wuhan Goldhome Hipot Electrical Co., Ltd. is one of the leading manufacturers and suppliers of full automatic dielectric loss tester in China. With abundant experience, our factory offer high quality customized products made in China with competitive price. Welcome to contact us for quotation.

Product Overview

The HM5006 Transformer Dielectric Loss Tangent Tester is a high-precision device specifically designed for automatic on-site measurement of the dielectric loss factor (Tgδ) and capacitance in various high-voltage equipment in power plants, substations, laboratories, and similar facilities. With its integrated structure, it combines a dielectric loss bridge, a variable frequency power supply, an step-up transformer, and a highly stable SF6 standard capacitor in a single device. The high-voltage source is generated by an internal inverter that supplies the transformer voltage for sample testing.

Under alternating voltage, the dielectric dissipates a portion of the electrical energy, which is converted into heat energy to produce losses. This energy dissipation is termed dielectric loss. When alternating voltage is applied to the dielectric, the phase angle difference between voltage and current in the dielectric is θ. The complementary angle δ of θ is called the dielectric loss angle, and the tangent value tgδ of δ is referred to as the dielectric loss tangent. The tgδ value serves as a parameter for measuring dielectric loss. The instrument's measurement circuit comprises a standard circuit (Cn) and a circuit under test (Cx), as illustrated. The standard circuit consists of an internal high-stability standard capacitor and a measurement circuit, while the circuit under test comprises the test object and a measurement circuit. The measurement circuit includes a sampling resistor, a preamplifier, and an A/D converter. The measurement circuit acquires the amplitude and phase difference between the standard circuit current and the circuit under test current. A digital signal processor then employs real-time digital acquisition methods to perform vector calculations, yielding the sample's capacitance value and dielectric loss tangent. Internal anti-interference measures ensure precise measurements remain achievable even under external electric field interference.

• Determine the pressure resisting level of equipment and choose the step-up level of instrument correctly to avoid sparking through the equipment and damaging the instrument before using this instrument to test equipment;
• Although the associated high voltage cable for the instrument has been detected in factory, it still should be kept far away from human body;
• The input voltage shall be AC220V±10%, the maximum input voltage shall be AC264V, and any excess would cause permanent damage without warranty;
• The printer would have paper jam in printing due to loose coil paper during handling, at this time only need to take out the coil paper, wind it tightly and load it again;
• The instrument should be kept away from moisture and strenuous vibration;
• The output zero line should be grounded when the generator supplies power, otherwise erroneous earthing will be prompted.

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