Remote monitoring device of transformer insulating resistance

• Main Author: ZHAO HANGFEI
• Format: Patent
• Language: Chinese; English
• Published: 10.09.2014
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The utility model discloses a remote monitoring device of transformer insulating resistance. The remote monitoring device includes a first switch on a three-phase line of a transformer primary coil, a second switch on a three-phase line of a secondary coil and a transformer ground terminal. The remote monitoring device also includes a main control unit, a programmable DC high-voltage power supply, a DC voltage conversion circuit and an A/D converter. Three binding posts of the transformer primary coil and a transformer center point are all connected with an anode output end of the programmable DC high-voltage power supply through a third switch and a cathode input end of the programmable DC high-voltage power supply is connected with an output end of the DC voltage conversion circuit. An input end of the DC voltage conversion circuit is connected with the transformer ground terminal through a forth switch. The first, second, third and forth switches and the programmable DC high-voltage power supply are all co