Method and device for testing acid value of natural ester insulating liquid

• Main Authors: CHEN YUQING, HUANG QINGDAN, SONG HO-YOUNG, WU PEIWEI, HUANG HUIHONG, WANG YONG, YANG LIU, LIU JING, LI ZIYONG, ZHAO CHONGZHI, LI ZHUYA, YANG ZENG
• Format: Patent
• Language: Chinese; English
• Published: 09.01.2024
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention discloses a method and device for testing the acid value of a natural ester insulating solution, and the method comprises the following steps: carrying out neutralization titration on an isopropanol solution containing a phenolphthalein indicator in a first conical flask through a neutralization titration reagent, and determining the consumed blank titration milliliter number, and adding the natural ester insulating liquid and an isopropanol solution containing a phenolphthalein indicator into a second conical flask, carrying out neutralization titration through a neutralization titration reagent, determining the consumed actually measured titration milliliter number, and calculating the acid value of the natural ester insulating liquid based on the blank titration milliliter number, the actually measured titration milliliter number and other parameters. It can be seen that compared with a potentiometric titration method, toluene and isopropanol used in the method are low in price, nontoxic and