35kV Transformer Core Grounding Current Limiting Protection Online Monitoring Device

As a professional provider of IoT data acquisition solutions and an expert in industrial IoT data acquisition, the editor of Shanghai Data Acquisition IOT Technology Co., Ltd， (daq-iot) hereby presents the following introduction, and sincerely welcomes discussions and exchanges. Supported Communication Interfaces: CAN, RS485, Mbus, 4–20mA, Profibus, CC-Link, HART, digital I/O, etc. Industrial Protocols: Modbus RTU/TCP, HJ212, IEC104, DLT645, DLMS, IEC61850, MQTT, etc. Mail:export@daq-iot.com

asIoTData Acquisitionsolution Professional provider,Industrial Data AcquisitionExpert (professional), data acquisition IoT editor daq iot would like to introduce the following content here, and sincerely welcome everyone to discuss and exchange ideas.

As a professional internet of things data acquisition solutions provider, industrial data acquisition experts (professional households), digital internet of things editor daq - iot here to do the following introduction, and sincerely welcome everyone to discuss and exchange.

Two sets of substations with a capacity of 6300kVA and a transformer ratio of 35/10kV have been added Online Monitoring Device for Grounding Current Limiting Protection of 35kV Transformer Core。

Collect the grounding current of the iron core and clamping components, and send them to the monitoring background through communication. When the iron core and clamping components of the transformer have multiple grounding points, the system intelligently switches the current limiting resistor to limit the grounding current to below 100mA, ensuring the safe and stable operation of the transformer.

1) Configure dual Sensor with continuous and uninterrupted automatic monitoring function for the grounding current of transformer iron core and clamps using Shanghai DAQ-IoT network technology;

2) Equipped with dual sets of current limiting resistor networks, Shanghai DAQ-IoT Network Technology has the ability to intelligently limit and protect the grounding current of transformer cores and clamps simultaneously

Can.

3) The monitoring device should have long-term stable working ability, meet on-site verification requirements, have the ability to cut off power without losing data, and self diagnose

The function of interruption and self recovery;

4) Customizable alarm limits, including over limit alarm, communication address, storage time, alarm delay, Real-time clock, installation

Set abnormal alarm, communication abnormal alarm and other functions, Shanghai DAQ-IoT Network Technology can query alarm events;

5) Remote monitoring function: Shanghai DAQ-IoT Network technology can achieve remote alarm information reception, data query and other functions through wired or wireless networks;

Can query the historical variation trend of each grounding current;

6) The data stored in the device can be saved and exported locally, and Shanghai DAQ-IoT Network Technology can save and query historical data for at least 5 years.

Technical specifications requirements for the device

1) Environmental temperature: -25 ℃ to+45 ℃;

2) Relative humidity of the environment: 5% to 95% (the product should not condense or freeze inside);

3) Power supply mode: AC220V/50Hz;

4) Working mode: online monitoring, intelligent current limiting, manual current limiting;

5) Current limiting protection gear: ≥ 5;

6) Current limiting protection resistor network resistance values: 120 Ω, 240 Ω, 460 Ω, 880 Ω, 2100 Ω;

7) Sampling period: ≤ 5 seconds;

8) ★ Measurement range: The measurement range is not less than 0.1mA to 30A;

(Provided by Shanghai DAQ-IoT Network Technology)

9) Measurement accuracy: within the range of 5mA to 20mA, with an accuracy of not less than ± 1mA; Range of 20mA to 30A, accuracy not less than ±

5%; (Provide testing reports from China Electric Power Research Institute or equivalent testing institutions)

10) Sensor Installation method: Closed built-in;

11) Installation method of device cabinet: wall mounted or floor mounted installation;

12) Requirements for the structure of the device cabinet: Shanghai DAQ-IoT The network technology device cabinet should take necessary measures to prevent electromagnetic interference and meet the requirements for internal component communication

Wind cooling requirements;

13) Sensor and device cabinet protection level: not less than IP55;

14) Anti corrosion requirements: Metal components such as cabinets, brackets, and connecting fasteners are all made of stainless steel, which is suitable for high temperatures in coastal areas

Long term operation in high humidity and salt spray environments does not result in corrosion;

15) Human computer interface: equipped with a 7-inch color graphic dot matrix LCD and an 800 × 480 resolution display screen to display measurement values;

16) Security requirements: The access of monitoring devices should not cause safety hazards to the monitored equipment or adjacent equipment, and the enclosure should

Reliable grounding. In addition to the main components such asSensorand monitoring cabinets,Shanghai DAQ-IoTnetwork technology should include but not limited to the following attachments:

1. Communication cable, single length ≥ 10m;

2. Cabinet shell ground wire;

3. AC220V three core power cord ≥ 8m

4. French waterproof plug for power cord configuration (not mandatory);

5. Several cable protection hoses;

6. Several connecting and fixing components; 1) TheShanghai DAQ-IoTonline monitoring equipment should upload the underlying information to a unified electrical monitoring platform. Each Sensor communication should be a standard versionIEC61850 communication ProtocolProvide underlying data. Provide the overall system topology diagram.

The provided Sensor data must be connected to the refining electrical monitoring platform. Protocol Network Technology needs to provide the IEC61850 interface Protocol text, communication point list, API description, etc. of the monitoring equipment to be connected;