Deif DGU-2 差動(dòng)保護(hù)裝置是丹麥 DEIF 公司推出的一款專業(yè)電力保護(hù)設(shè)備，主要應(yīng)用于發(fā)電機(jī)、變壓器等關(guān)鍵電力設(shè)備的差動(dòng)保護(hù)，確保電力系統(tǒng)安全穩(wěn)定運(yùn)行。
一、產(chǎn)品特點(diǎn)
高精度電流檢測(cè)
DGU-2 差動(dòng)保護(hù)裝置采用高精度電流互感器（CT）和先進(jìn)的數(shù)字信號(hào)處理技術(shù)，能夠?qū)崟r(shí)、準(zhǔn)確地監(jiān)測(cè)設(shè)備電流變化，確保差動(dòng)保護(hù)的靈敏度和可靠性。
快速故障響應(yīng)
裝置具備高速的故障檢測(cè)和響應(yīng)能力，可在毫秒級(jí)時(shí)間內(nèi)識(shí)別并切除故障，有效防止設(shè)備損壞和事故擴(kuò)大。
靈活的配置與參數(shù)設(shè)置
用戶可根據(jù)具體應(yīng)用需求，靈活配置保護(hù)功能、動(dòng)作門檻值、延時(shí)時(shí)間等參數(shù)，滿足不同場(chǎng)景的定制化需求。
全面的保護(hù)功能
除差動(dòng)保護(hù)外，DGU-2 還集成過流、過載、接地故障等多種保護(hù)功能，提供全方位的設(shè)備保護(hù)。
友好的人機(jī)界面
裝置配備直觀的操作界面和顯示模塊，支持本地參數(shù)設(shè)置、狀態(tài)監(jiān)測(cè)和故障記錄查詢，便于用戶操作和維護(hù)。
高可靠性與穩(wěn)定性
采用工業(yè)級(jí)元器件和冗余設(shè)計(jì)，確保裝置在惡劣環(huán)境下長期穩(wěn)定運(yùn)行，減少維護(hù)成本。
二、功能優(yōu)勢(shì)
差動(dòng)保護(hù)功能
通過比較設(shè)備兩側(cè)電流的矢量差，識(shí)別內(nèi)部故障（如繞組短路、接地故障等），并快速切斷故障回路，保護(hù)設(shè)備安全。
諧波抑制與抗干擾能力
內(nèi)置先進(jìn)的濾波算法，有效抑制諧波干擾，確保保護(hù)動(dòng)作的準(zhǔn)確性。
通信與監(jiān)控功能
支持 Modbus、IEC 61850 等多種通信協(xié)議，可與上位機(jī)或監(jiān)控系統(tǒng)集成，實(shí)現(xiàn)遠(yuǎn)程監(jiān)控和數(shù)據(jù)傳輸。
故障記錄與分析
裝置可記錄故障發(fā)生時(shí)的電流、電壓波形及動(dòng)作時(shí)間，為故障分析提供詳細(xì)數(shù)據(jù)支持。
三、應(yīng)用場(chǎng)景
DGU-2 差動(dòng)保護(hù)裝置廣泛應(yīng)用于以下領(lǐng)域：
發(fā)電廠：保護(hù)發(fā)電機(jī)、變壓器等核心設(shè)備。
工業(yè)電力系統(tǒng)：保護(hù)大型電動(dòng)機(jī)、變頻器等關(guān)鍵負(fù)載。
新能源領(lǐng)域：適用于風(fēng)力發(fā)電機(jī)、光伏逆變器等設(shè)備的保護(hù)。
數(shù)據(jù)中心與基礎(chǔ)設(shè)施：保障供電系統(tǒng)的可靠性和連續(xù)性。
四、技術(shù)參數(shù)（參考典型規(guī)格）
參數(shù) 規(guī)格
額定電流 1A/5A（可定制）
動(dòng)作時(shí)間 <20ms（典型值）
精度等級(jí) 0.2S（電流測(cè)量）
通信接口 RS485、以太網(wǎng)、IEC 61850
工作溫度 -25°C 至 +70°C
防護(hù)等級(jí) IP54（可選 IP65）
五、安裝與維護(hù)
安裝：需由專業(yè)技術(shù)人員按照說明書進(jìn)行安裝，確保電流互感器極性正確，二次回路接線牢固。
維護(hù)：定期檢查裝置運(yùn)行狀態(tài)，清潔外殼，更新固件，并根據(jù)需要校準(zhǔn)參數(shù)。
Deif DGU-2 differential protection device is a professional power protection equipment launched by DEIF company in Denmark. It is mainly used for differential protection of key power equipment such as generators and transformers, ensuring the safe and stable operation of the power system.
CHARACTERISTICS
High precision current detection
The DGU-2 differential protection device adopts high-precision current transformers (CT) and advanced digital signal processing technology, which can monitor equipment current changes in real time and accurately, ensuring the sensitivity and reliability of differential protection.
Quick fault response
The device has high-speed fault detection and response capabilities, which can identify and remove faults in milliseconds, effectively preventing equipment damage and accident escalation.
Flexible configuration and parameter settings
Users can flexibly configure protection functions, action threshold values, delay times, and other parameters according to specific application requirements to meet customized needs in different scenarios.
Comprehensive protection function
In addition to differential protection, DGU-2 also integrates multiple protection functions such as overcurrent, overload, and ground fault, providing comprehensive equipment protection.
Friendly human-machine interface
The device is equipped with an intuitive operating interface and display module, supporting local parameter settings, status monitoring, and fault record queries, making it easy for users to operate and maintain.
High reliability and stability
Adopting industrial grade components and redundant design to ensure long-term stable operation of the device in harsh environments and reduce maintenance costs.
2、 Functional advantages
Differential protection function
By comparing the vector difference of currents on both sides of the equipment, internal faults (such as winding short circuits, grounding faults, etc.) can be identified, and the faulty circuit can be quickly cut off to protect the safety of the equipment.
Harmonic suppression and anti-interference capability
Built in advanced filtering algorithms effectively suppress harmonic interference and ensure the accuracy of protection actions.
Communication and monitoring functions
Supports multiple communication protocols such as Modbus and IEC 61850, and can be integrated with upper computers or monitoring systems to achieve remote monitoring and data transmission.
Fault recording and analysis
The device can record the current, voltage waveform, and action time when a fault occurs, providing detailed data support for fault analysis.
3、 Application scenarios
DGU-2 differential protection device is widely used in the following fields:
Power plant: protects core equipment such as generators and transformers.
Industrial power system: protects critical loads such as large motors and frequency converters.
In the field of new energy, it is suitable for the protection of equipment such as wind turbines and photovoltaic inverters.
Data center and infrastructure: ensuring the reliability and continuity of the power supply system.
4、 Technical parameters (refer to typical specifications)
Parameter specifications
Rated current 1A/5A (customizable)
Action time<20ms (typical value)
Accuracy level 0.2S (current measurement)
Communication interface RS485, Ethernet IEC 61850
Working temperature -25 ° C to+70 ° C
Protection level IP54 (optional IP65)
5、 Installation and maintenance
Installation: Professional technicians need to install according to the instructions to ensure that the polarity of the current transformer is correct and the secondary circuit wiring is firm.
Maintenance: Regularly check the operating status of the device, clean the casing, ｕｐｄａｔｅ firmware, and calibrate parameters as needed.
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