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Insulating oil for explosion-proof capacitor

A technology of insulating oil and capacitors, applied in the field of capacitors, which can solve the problems of easy ignition of castor oil by electric arcs and explosion of capacitors, and achieve the effects of improving flame retardancy, avoiding explosions, and improving safety

Inactive Publication Date: 2017-03-22
安徽四新电子有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, castor oil is flammable, and its ignition point is 322°C. Once the capacitor breaks down in a large area, the arc generated by the breakdown will easily ignite the castor oil, making the capacitor have the risk of explosion.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] First add 12.2Kg glycerol, 1.6Kg carbonamide and 3.3Kg melamine into the high-shear emulsifier, set the rotating speed of the rotor in the high-shear emulsifier to 600r / min, and stir for 30min; then add 77Kg castor oil, Add 8.3Kg bisphenol A-bis(diphenyl phosphate), 5.6Kg cresyl diphenyl phosphate, and 20.3Kg diphenyl phosphite into the high-shear emulsifier in turn, and then set the rotor speed to 1200r / min, stirred for 80min, and the stirring temperature was 55°C; finally cooled to room temperature to obtain the insulating oil for explosion-proof capacitors.

[0012] Experiment 1. Immerse 50mm×50mm wood pulp paper in the above-mentioned insulating oil for explosion-proof capacitors for 50~60min. After drying naturally, test according to the UL94 combustion test standard, and its flame retardant grade is V-1.

Embodiment 2

[0014] First add 13.4Kg glycerol, 1.7Kg carbonamide and 3.7Kg melamine into the high-shear emulsifier, set the rotating speed of the rotor in the high-shear emulsifier to 650r / min, and stir for 25min; then add 79Kg castor oil, Add 8.5Kg of bisphenol A-bis(diphenyl phosphate), 5.7Kg of cresyl diphenyl phosphate, and 21.7Kg of diphenyl phosphite into the high-shear emulsifier in turn, and then set the rotor speed to 125r / min, stirred for 75min, and the stirring temperature was 60°C; finally cooled to room temperature to obtain the insulating oil for explosion-proof capacitors.

[0015] Experiment 2. Immerse 50mm×50mm wood pulp paper in the above-mentioned insulating oil for explosion-proof capacitors for 50~60min, after drying naturally, test according to the UL94 combustion test standard, and its flame retardant grade is V-1.

Embodiment 3

[0017] First add 13.9Kg glycerin, 1.8Kg carbonamide and 3.9Kg melamine into the high-shear emulsifier, set the rotating speed of the rotor in the high-shear emulsifier to 700r / min, and stir for 20min; then add 81Kg castor oil, Add 8.7Kg bisphenol A-bis(diphenyl phosphate), 5.8Kg cresyl diphenyl phosphate, and 22.2Kg diphenyl phosphite into the high-shear emulsifier in turn, and then set the rotor speed to 1300r / min, stirred for 70min, and the stirring temperature was 65°C; finally cooled to room temperature to obtain the insulating oil for explosion-proof capacitors.

[0018] Experiment 3. Immerse 50mm×50mm wood pulp paper in the above-mentioned insulating oil for explosion-proof capacitors for 50~60min. After drying naturally, test according to the UL94 combustion test standard, and its flame retardant grade is V-1.

[0019] Control experiment 1. The 50mm×50mm wood pulp paper was directly tested according to the UL94 combustion test standard without any treatment, and its fl...

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Abstract

The invention relates to insulating oil for an explosion-proof capacitor. The insulating oil is prepared by mixing castor oil, bisphenol A-bis(diphenyl phosphate), diphenyl cresol phosphate, diphenyl phosphite, glycerol, carbomite and melamine. The flame resistance of the insulating oil for the explosion-proof capacitor is greatly improved while the insulativity is guaranteed, when the capacitor is subjected to large-area breakdown, the phenomenon that the capacitor explodes is avoided, and the safety of the capacitor is improved.

Description

technical field [0001] The invention relates to insulating oil for explosion-proof capacitors, belonging to the technical field of capacitors. Background technique [0002] Power capacitors, capacitors used in power systems and electrical equipment. Any two metal conductors separated by an insulating medium form a capacitor. The size of the capacitance of the capacitor is determined by its geometric size and the characteristics of the insulating medium between the two plates. When the capacitor is used under AC voltage, its reactive power is often used to represent the capacity of the capacitor, and the unit is var or kvar. [0003] In low-voltage power capacitors, the commonly used capacitor oil impregnated material is castor oil, although castor oil has good low temperature performance, hydrolysis resistance and excellent electrical insulation. However, castor oil is flammable, and its ignition point is 322°C. Once the capacitor breaks down in a large area, the arc gene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M141/10C10N30/08C10N40/16
CPCC10M141/10C10M2207/022C10M2207/402C10M2215/10C10M2215/222C10M2223/041C10M2223/049C10N2030/08C10N2040/16
Inventor 许友宝
Owner 安徽四新电子有限责任公司
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