PRS-761 smart terminalis developed based on the IEC61850 standard for digital substations, which is applicable to transformers and reactors. The device has a fully open digital interface, which can be seamlessly connected with primary intelligent equipment (primary intelligent switch), and is also compatible with conventional primary equipment. The device provides interfaces according to the IEC61850 protocol, which has no restriction on network type. It can achieve flexible networking, and can be applied to various networking methods at the process level.

The PRS-7393 merging unit is used in intelligent substations. It can be connected to the conventional primary equipment using cables, and collect analog signals from the conventional primary transformers or receive digital signals from other merging units. After synchronization processing, the sampling information is provided to multiple secondary devices such as protection, measurement and control, digital watt-hour meter and digital wave recorder via the Ethernet interface (optical fiber). The data output format of the PRS-7393 merging unit conforms to the IEC61850 standard for intelligent substations.

The PRS-7395 merging unit and smart terminal isadevice integrating the smart terminal and merging unit of intelligent substation. It provides digital interfaces for traditional circuit breakers, knife switches and transformers, andcan provide the function of local operation box. It can be used asanintelligent accessory of traditional circuit breakers, knife switches and transformers.

The PRS-7789 smart terminal is a smart terminal device fully supporting digital substations. It provides digital interfaces for traditional circuit breakers and has the function of a local operation box. It can be used as an intelligent accessory for traditional circuit breakers. The PRS-7789 smart terminal receives the controlcommand from associated bay layer equipment through the optical fiber GOOSE network or point-to-point optical fiber connection, completes the operation of circuit breaker, and collects the relevant state signals of the circuit breaker and sends it to the bay layer equipment through the optical fiber.