1.Product profile
Traditional wind or photovoltaic power plants use decentralized equipment such as PLC, lightning protection module, PT, current transmitter, voltage transmitter, etc. to complete functions such as transformer protection, measurement and control, and information upload. Due to the use of multiple auxiliary devices, there are many wiring faults in the entire system, making debugging, operation, and maintenance relatively difficult. Simultaneously involving equipment from multiple manufacturers makes it difficult to coordinate the operation, debugging, and maintenance of the product.
The LOR900B box transformer protection and measurement device adopts an integrated design, which integrates multiple functions such as protection and measurement, non electricity protection, communication, and local control. One device can complete tasks that can only be coordinated by multiple devices, while ensuring the same functions such as protection, measurement and control, and information exchange of the transformer, reducing the difficulty of product use and operation and maintenance costs.
Centralized monitoring
Concentrate and combine the functions of various dispersed devices and instruments, monitor the current, voltage, oil level, oil temperature, and other electrical and non electrical quantities of transformers in real time, and form a fiber optic ring network through dual optical fibers to upload data to the main station.
Enhance the protection function of transformers
It integrates the functions of traditional transformer relay protection, such as three-stage overcurrent protection, zero sequence protection, overvoltage and low voltage protection, etc. Its protection function can be switched on and off, making it convenient for users to choose and use.
Accident recording and storage function
The device records the operating status of the transformer, and records SOE events such as protection tripping events, remote control events, switch displacement, and non electric displacement in chronological order. Users can delete them according to their needs (password required) for easy access and inspection.
On site operation
Compared to traditional monitoring solutions, this device is equipped with a display and keyboard, making it convenient for maintenance and inspection personnel to access monitoring, protection, switch displacement, historical records, and other information of the transformer on site.
Easy to maintain
The device adopts an integrated design, with relatively dispersed devices and instrument combination monitoring, reducing the complexity of wiring, simplifying maintenance procedures and costs.
2.Product Classification and Function Introduction
| category |
major function |
900B-1 |
900B-2 |
900B-3 |
| Pure measurement and control |
Ring network with optical fiber |
With optical fiber ring network and communication manager function. |
| telemetering |
Ac measurement: |
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| Three-phase current, three-phase voltage, frequency, power factor, active power, reactive power, active power and reactive power; |
| 6 channels of current and 6 channels of voltage |
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| DC measurement: 6 channels in total. |
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| Standard 2-way 4-20mA (can be increased to 3-way, please specify when ordering). |
| Standard 3-way thermal resistor |
| remote signalling |
40 channels are opened, of which the first 12 channels are fixed as non-electric protection signal inputs. |
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√ |
√ |
| remote control |
9-way relay output, used for protection output or ordinary remote control output. |
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√ |
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| protect |
Non-electric quantity protection: |
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√ |
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| Light gas, heavy gas, high temperature, ultra-high temperature, low oil level of transformer, high oil level, pressure relief valve, high-voltage fuse, phase A, phase B and phase C, non-electric quantity 1 and non-electric quantity 2. |
| General protection: |
| Three-stage current protection, zero-sequence current protection, overvoltage protection and undervoltage protection. |
| remote control |
9-way relay output, used for protection output or ordinary remote control output. |
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√ |
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| communication |
Two self-healing optical fiber communication interfaces can form an optical fiber ring network. |
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| 2-way Ethernet communication interface |
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| 1 485 communication port (can be increased to 2 channels, please specify when ordering) |
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| agreed-upon stipulation |
Standard 6-way RS485 interface (it can be increased to 10, please specify when ordering). |
|
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| change |
1-way Ethernet communication interface |
| record |
Record the recent 35 accidents and operation records. |
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3.Technical parameter
| technical requirement |
Functional requirements |
Application parameters |
| Auxiliary working power supply |
Power input |
AC/DC85-265V |
| frequency |
50Hz |
| power consumption |
Normal operation ≤ 10w; Device action ≤15W |
| current input |
RatIng value in |
5A(1A) |
| measuring range |
0~1.2In |
| measurement error |
≤±0.5% |
| power consumption |
≤0.5VA/ phase |
| Voltage input |
Rated Un |
100V/270V/690V; |
| measuring range |
0~1.2Un |
| measurement error |
≤±0.5% |
| power consumption |
≤0.5VA/ phase |
| Other measurement accuracy |
frequency |
≤±0.01Hz |
| Power factor |
≤±1.0% |
| Active power/reactive power |
≤±1% |
| Switch input |
port number |
40 road |
| Input mode |
Passive contact (with 24V drive) |
| Isolation mode |
Photoelectric isolation, isolation voltage 2500V V. |
| Contact output |
port number |
9 road |
| operating voltage |
AC250V,8A |
| Input mode |
idle contact |
| Isolation mode |
Photoelectric isolation, isolation voltage 2500V V. |
| communication interface |
communication interface |
2 optical ports, 2 Ethernet ports, 2 485 ports, |
| Up to 10 485 protocol conversion modules can be configured. |
| Isolation type |
Photoelectric isolation |
| Baud rate |
RS485:1200bps~9600bps |
| Optical port: 155M, 1310nm, ST interface, single mode ≥20Km. |
| Ethernet: 10M/100M adaptive |
| communication protocol |
Modbus/IEC 60870-5-103/104, etc. |
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