Overview:
In recent years, China's new energy industry has developed rapidly, especially solar energy and wind energy. With the strong support of national policies, it has entered a stage of rapid development. In the process of development, related supporting facilities and technologies are particularly important. Taking the monitoring of box-changing in photovoltaic power plants as an example, with the rapid development of the photovoltaic industry, the current non-intelligent 35kV box has become the automation process affecting photovoltaic power plants. The biggest obstacle, the various information in the box change can not be uploaded to the central control room in real time, making the box become a monitoring blind spot for the photovoltaic power station, which brings great inconvenience to the safe production and routine maintenance of the photovoltaic power station, especially for the equipment. And the hidden dangers of personal safety.

Our company has developed a new generation of box-change intelligent monitoring device UNT-BMC-3000 (F/G/T), which is used for analog acquisition, non-electricity protection, remote control and communication functions of box change. Realize the remote management and automatic monitoring of the PV box by the booster station, and meet the operation management mode of the “unmanned duty, few people on duty” of the photovoltaic power station. The device can collect various information of the transformer in real time, such as electric current signals such as current and voltage of the box, and can also collect non-electrical signals such as oil level, oil temperature and heavy gas of the transformer. When an abnormal event occurs, the UNT-BMC-3000 device uploads the fault information in time through different communication media, sends an alarm signal or trips to avoid further expansion of the fault, recovers the direct loss of damage to the box-changing equipment, and generates electricity during maintenance. Indirect loss of quantity. In addition, the operator can monitor and control the box change in the distance, which greatly reduces the workload of on-site maintenance and the resulting personal safety hazards.

Product description:
UNT-BMC-3000(F) is applied to the wind farm to increase the voltage and voltage of the high and low voltage side and control the switch.
UNT-BMC-3000(G) is applied to the double-side current and voltage acquisition and switch control of the step-up and low-voltage side of the photovoltaic power plant.
UNT-BMC-3000(T) In the photovoltaic power station power unit box change information, inverter combiner box information collection and control splitting low-voltage side double-side current voltage collection and switch control, this device combines communication management machine, fiber Switch, measurement and control protection and other functions.

Functional configuration:
UNT-BMC-3000(F)
1) AC volume acquisition: 3 voltages, 4 currents (maximum expansion to 6 voltages, 8 currents);
2) Switching quantity: 24 channels open (maximum expansion to 36 channels), 8 relay outlets, 6 of which are programmable outputs;
3) DC input: 4 thermal resistors or 4 4-20mA (maximum expansion to 8 DC), can be set according to the situation;
4) Electrical quantity protection: three-stage over-current protection, zero-sequence current protection, over-voltage protection, low-voltage protection, phase loss protection, single-phase grounding, etc.
5) Non-electricity protection: 8 independent exits (tripping, alarm optional), heavy gas trip, light gas alarm, ultra-high temperature trip, high temperature alarm, low oil level alarm, pressure abnormal alarm, etc.
6) Communication function: 2 RS485, 2 optical ports, 2 Ethernet ports;
7) Fault recording: record 5 waveforms before and after the fault point;
8) Support WIFI.

UNT-BMC-3000(G)
1) AC volume acquisition: 6 voltages, 8 currents (expandable to 9 currents);
2) Switching quantity: 24 channels open (maximum expansion to 36 channels), 8 relay outlets, 6 of which are programmable outputs;
3) DC input: 4 thermal resistors or 4 4-20mA (maximum expansion to 8 DC), can be set according to the situation;
4) Electrical quantity protection: three-stage over-current protection, zero-sequence current protection, over-voltage protection, low-voltage protection, phase loss protection, single-phase grounding, etc.
5) Non-electricity protection: 8 independent exits (tripping, alarm optional), heavy gas trip, light gas alarm, ultra-high temperature trip, high temperature alarm, low oil level alarm, pressure abnormal alarm, etc.
6) Communication function: 2 RS485, 1 Ethernet port;
7) Fault recording: record 5 waveforms before and after the fault point;
8) Support WIFI.

UNT-BMC-3000(T)
1) AC volume acquisition: 6 voltages, 8 currents (expandable to 9 currents);
2) Switching quantity: 48 way opening, 8 way relay outlet, 6 way programmable output;
3) DC input: 4 thermal resistors or 4 4-20mA (maximum expansion to 8 DC), can be set according to the situation;
4) Electrical quantity protection: three-stage over-current protection, zero-sequence current protection, over-voltage protection, low-voltage protection, phase loss protection, single-phase grounding, etc.;
5) Non-electricity protection: 8 independent exits (tripping, alarm optional), heavy gas trip, light gas alarm, ultra-high temperature trip, high temperature alarm, low oil level alarm, pressure abnormal alarm, etc.
6) Optical fiber communication: 2 optical fibers, 5 Ethernet ports, transmission distance of not less than 50 kilometers, can form a self-healing fiber ring network, support IEC60870-5-103/104 protocol;
7) Communication management: 10 RS485 master station interfaces can access the smart box such as combiner box and inverter, and can complete the protocol conversion;
8) Fault recording: record 5 waveforms before and after the fault point;
9) Support WIFI.