together, mainly used for energy metering and protection. It is commonly used in high-voltage power grids, especially for energy metering and line loss assessment in power systems. Types and functions of combination transformers Combined transformers can be combined into a voltage transformer and a current transformer as needed for measuring single-phase power; It can also be a combination of two voltage transformers and two current transformers, used to measure three-phase power using the two watt meter method in a three-phase three wire system; It can also be a combination of three voltage transformers and three current transformers for three-phase electrical measurement. Application scenarios of combined transformers Combined transformers are suitable for outdoor power systems with a rated voltage of 10kV and below, mainly used for energy metering. It can also provide secondary switching power supplies with various voltages and varying capacities according to user requirements, in order to achieve high-voltage prepaid metering function. Technical parameters and characteristics of combined transformers Rated voltage: 10kV and below Rated frequency: 50Hz Measurement accuracy: 0.2S level, 0.2 level Insulation method: Epoxy resin insulation is used to replace traditional oil immersed metering boxes, improving the reliability and maintainability of the equipment.
