Merging units are used to sample AC analog values and transmit the sampled values(SV) to protection devices, bay control units(BCU) or electric meters through optical communication channels based on the IEC61850-9-2 protocol.

• IEC61850-9-2 sampled value transmission
• GOOSE transmission/reception
• GMRP function
• Voltage and current synchronization
• IEC61850-9-2 voltage sampled value reception from a busbar MU
• Voltage transfer
• Data synchronization

• A high performance multi-DSP hardware structure is adopted in this device. Therefore, the device can process real-time data with high speed and high precision.
• Modularized hardware design allows for easy upgrade or maintenance of the device by qualified service technicians.
• Various function optional modules satisfy various scenarios according to the different requirements of each user.
• The adoption of high precision 16 bits A/D converter ensures high precision measurement calculations. Two A/ D converters are integrated in a single AC sample channel, and the sampling rate is 80 samples per fundament wave cycle. The real-time data calculation can be completed within one sampling period.
• A friendly and convenient human machine interface (HMI) display is provided for the user to view the status of the device.
• Various methods of GPS time synchronization are contained in this device. These includeIEEE1588, pulse per second (PPS) and IRIG-B synchronization.
• This device can support several communication protocols, which are adopted in the modern digital substation. For example, IEC61850-9-2LE and IEC61850-8 (GOOSE).

Parameter Name	Parameter Value
Signal type	analog
Associated function	transmitter