You asked again about the microcomputer relay protection tester, it seems you are very interested in this “all-around coach” of the power grid safety line!

Since we have already understood its core purpose and working principle, this time we can delve deeper into its hardware classification and the latest evolution in the era of smart grids, which will help you understand this type of equipment more comprehensively:

⚡ Classification by Output Channels: Three-Phase and Six-Phase

According to the complexity of actual testing scenarios, microcomputer relay protection testers are mainly divided into two hardware configurations:

Three-phase output models: Mainly used for basic verification of line protection, overcurrent protection, distance protection, etc., in conventional substations and distribution rooms. These devices are usually compact and portable, meeting most daily inspection and on-site debugging needs.

Six-phase output models: Mainly targeted at complex scenarios such as large transformers and smart substations. They can synchronously output six-phase currents and six-phase voltages, perfectly adapting to complex logic tests that require simultaneous simulation of multi-side currents, such as differential protection for three-winding transformers, automatic transfer switching (ATS), and fast switch devices.