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Product — Dielectric loss test equipment — High precision bridge tester
Product name：High precision bridge tester
Executive standard：GB1409-88、DL/T962-2005
Other name：High precision high voltage capacitor bridge, high precision capacitor dielectric loss tester
Component：High precision bridge, standard capacitor, high voltage test power supply
Note: there are two specifications of dielectric loss bridge：
● High precision high voltage capacitor bridge: external test power supply and standard capacity are required
● Automatic dielectric loss tester: internal 10kV boost power supply
| Purpose & brief description |
| ● It is mainly used to measure the dielectric loss (TG) of various insulating oils and insulating materials δ） And dielectric constant（ ε）； ● Dielectric loss refers to the internal energy loss of insulating materials under the action of electric field due to the hysteresis effect of dielectric conductivity and dielectric polarization; Also called dielectric loss, referred to as dielectric loss; ● Dielectric loss factor refers to the parameter measuring the degree of dielectric loss; ● Application: power product manufacturing companies, power operation departments, scientific research institutions and colleges and universities; ● Application products: various insulating parts, medium voltage switchgear, GIS high voltage switch, cable and cable accessories, transformer, power transformer, high voltage circuit breaker, capacitor bushing, motor, lightning arrester, other high voltage electrical components and insulating materials; |
| Test purpose |
| ● The purpose of dielectric loss test is to judge the insulation performance of equipment by measuring dielectric loss factor; Generally, Xilin bridge, current comparison bridge, M-type dielectric tester and other instruments are used for test; ● Measuring dielectric loss factor is an indispensable item in preventive test; Because the dielectric loss factor of electrical equipment is too large, many energy will be lost in the form of heat under the action of AC voltage, and the generated heat will increase the insulation temperature of electrical equipment, aging the insulation, and even cause insulation thermal breakdown; ● The decrease of insulation capacity is directly reflected by the increase of dielectric loss factor; Further, the causes of insulation decline can be analyzed, such as insulation moisture, insulation oil pollution, aging and deterioration, etc; ● Therefore, dielectric loss test shall be conducted during delivery test, and such test shall also be conducted for electrical equipment in operation; While measuring the dielectric loss, the capacitance of the test object can also be obtained; The obvious change of capacitance reflects the short circuit and open circuit of one or several capacitor |
| Technical parameter |
| ● Measurable capacitance range: 0 ~ 1uF; ● Dielectric loss range: - 1.111110 ~ + 1.111110, step level: 0.00000 1; ● Measurement accuracy: capacitance ± 0.00005, dielectric loss ± 0.00001 ● Maximum test voltage: 500kV (CN = 100pF) ● Capacitance measurement range: 0.1cn ~ 1000cn (7 significant digits) external range expansion capacitance: at least 1100uf ● Measurement accuracy of capacitance: ± 1 × 10-5 ● Bridge TG δ Range: - 110% to + 110% ● Tg δ The measurement accuracy shall not be greater than 1% RDG ± 1 × 10-5 ● Tg δ Minimum measurement resolution 1 × 10-6 (up to 1 connected to computer) × 10-7） ● Test voltage: 0 ~ 1000kV, accuracy 1% (4 significant digits) |
| Technical features |
| ● The combination of current comparator and Xilin bridge is adopted, which has high measurement accuracy and good stability, and is suitable for use in the laboratory; ● The measurement range is wide. The bridge body can measure 1uF (CN = 1000pf) at most. A special range expander can also be selected to expand the measurement range by 1000 times; ● It has four terminal lead compensation function, which is especially suitable for large-capacity test objects; ● use modern computer technology for measurement data processing to make the operation more convenient and intuitive; ● Overcurrent protection function, the instrument will not be damaged in case of short circuit or breakdown of the test object; |
Feidian electric energy provides more professional testing equipment and technical services for power transformer, transformer, switch, high-voltage cable, power capacitor, bushing, insulator, lightning arrester, motor and other manufacturers
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Address：Lingang section of Shanghai Pilot Free Trade Zone
Tel：13761804576
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