電力設備測試 > 部份放電監測/診斷
可攜式高精度局部放電探測定位系統
EA Portable Partial Discharge (PD) Investigation System 型號:UltraTEV Locator™- 將局部放電活動的探測定位精度,提升到更高的水準(0.3ns,相當於10cm),能避免當機,並維持設備的健康狀態。
- 可攜式、功能強大,而且具備多種功能、操作簡單,只需最低限度的訓練。
- 可在所有現有的變電所設備,包括電纜與架空設備,進行局部放電活動的定位、測量、記錄及分析,並可藉由正確的維護和及早採取預防行動,而避免由局部放電引起變電所的嚴重故障。
- 採用超音波感測器及暫態地電壓感測器(TEV)進行表面局部放電及內部局部放電的偵測。
- 可測量環境條件:溫度、壓力及濕度。
- 可記錄局部放電的嚴重程度,以進行診斷分析。
- 機殼強固、防水,內部電池續航力長達13小時。
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- UltraTEV Locator™將局部放電活動的探測定位精度,提升到更高的水準,能避免當機,並維持設備的健康狀態。
- 可攜式、功能強大,而且具備多種功能、操作簡單,只需最低限度的訓練。
- 可在所有現有的變電所設備,包括電纜與架空設備,進行局部放電活動的定位、測量及記錄,並可藉由正確的維護和及早採取預防行動,而避免由局部放電引起變電所的嚴重故障。
- 優點:
- 定位及測量:局部放電活動定位及測量,可在問題導致故障前,即識別出問題。
- 記錄及分析:局部放電活動記錄及分析,可提供關於設備實際狀態的寶貴資訊。
- 可用更低的成本,進行更有效益的設備管理 – 更具可靠性、效率與安全性。
- 特點:
- 能將局部放電活動精確定位在10cm以內。
- 採用超音波感測器及暫態地電壓感測器(TEV)進行表面局部放電及內部局部放電的偵測。
- 可測量環境條件:溫度、壓力及濕度。
- 可記錄局部放電的嚴重程度,以進行診斷分析。
- 適用電纜及架空設備。
- 機殼強固、防水,內部電池續航力長達13小時。
- 具多種功能:
- 局部放電定位:
- 使用2支暫態地電壓感測探棒(TEV)及利用2支探棒之間的飛行時間測量,進行局部放電活動來源的定位。
- 採用最新電子技術,系統能計算放電的位置達到精度0.3ns(奈秒),相當於10cm。
- 局部放電探測:
- 在測量模式下是使用單支探棒(與UltraTEV Detector™及UltraTEV Plus +™手持式局部放電偵測器的方式一樣)檢測局部放電活動。
- 使用超音波與暫態地電壓2個感測器。
- 局部放電數值是隨著表示局部放電活動程度的指示燈一起顯示,綠燈表示沒有明顯的放電,琥珀燈表示有一些放電活動,紅燈則警告放電活動達某一位準,須進一步探查。
- 操作員可採用工廠預設的臨界值位準,也可自行設定。
- 局部放電比較測量,操作人員有幾種選擇:
- 使用超音波模式測量表面局部放電活動,並與其它類似設備測量的結果互相比較。
- 從音頻輸出端收聽表面局部放電活動。
- 擷取在設備不同點的內部局部放電活動的TEV讀值。
- 考量指示熱點的局部溫度因素。
- 考量環境條件因素:環境溫度、相對濕度及大氣壓力,所有這些都會影響局部放電活動。
- 將結果與其它類似設備及歷史記錄的結果互相比較。
- 電纜局部放電活動偵測:
- 使用插入式射頻電流互感器(RFCT)測量電纜內的局部放電活動,測量結果以皮庫(pC)單位的數值顯示。
- 局部放電活動記錄:
- 由UltraTEV Locator™擷取的所有測量值,包括音頻輸出,都可儲存到系統的內部記憶體中,儲存的資料可再透過USB埠下載到儲存裝置,並可將檔案直接讀進試算表,納入報告中。
- 局部放電定位:
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- 暫態地電壓感測(TEV):
- 感測器:電容性。
- 測量範圍:0 - 60dBmV。
- 解析度:1dB。
- 最大脈衝數/週期:2216。
- 最小脈衝速率:10Hz(只有滾動顯示)。
- 定位精度:0.3ns,相當於10cm。
- 放電圖譜相位參考源:光感應或插入式。
- 超音波檢測:
- 測量範圍:-7dBμV~68dBμV。
- 解析度:1dB。
- 精度:±1dB。
- 傳感器靈敏度:-65dB(0dB = 1V/μbar RMS SPL)。
- 傳感器中心頻率:40kHz。
- 傳感器直徑:16mm。
- 外差頻率:38.4kHz。
- 電纜局部放電偵測:
- 感測器:射頻電流互感器(RFCT)。
- 測量範圍:0 - 25,000pC
- 解析度:98pC。
- 精度:±98pC。
- 最小脈衝速率:10Hz。
- 機身:
- 機殼:自然成色射出成型塑膠殼。
- 指示介面:彩色背光LCD顯示幕、充電LED指示燈。
- 控制介面:觸控顯示幕。
- 電源:
- 內部電池:3.7V 27.2Ah鋰離子電池。
- 典型續航力:約13小時。
- 電池節電:低電池電壓自動關機。
- 詳細規格、配件、軟體及選購,歡迎洽詢。
- 暫態地電壓感測(TEV):
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- Locates, measures and records PD activity in all substation assets – including cables
- The UltraTEV Locator™ takes the investigation of Partial Discharge (PD) activity to a new level of accuracy and sophistication, allowing you to avoid power outages and maintain asset health.
- The UltraTEV Locator™ is a powerful and versatile Partial Discharge (PD) investigation unit. The device itself is portable and easy to use with minimal training.
- It works with all existing substation assets, including cables and overhead equipment.
- Approximately 85% of all disruptive substation failures are PD related and could have been avoided through proper monitoring and pre-emptive action.
- Benefits:
- Locating and measuring PD activity to identify faults BEFORE they lead to failures
- Recording and analysing PD activity to provide valuable information on the actual condition of assets
- More effective asset management, reliability, efficiency and safety, at lower cost
- Features:
- Ability to pinpoint PD activity to within 10cm
- Ultrasonic and TEV sensors for surface and internal PD
- Measures environmental conditions: temperature, pressure and humidity
- Records the severity of PD for diagnostic analysis
- Works with cables and overhead assets
- Tough, weatherproof case with built-in 13 hour battery life
- Multiple Functions:
- PD Location:
- Both TEV Probes are used to locate the source of the PD activity, using time-of-flight measurements between the two probes.
- The latest electronics enable the system to calculate the site of the discharge to an accuracy of 0.3ns (nanoseconds), equivalent to 10cm.
- PD Survey:
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In survey mode, a single probe is used in the same ways as our UltraTEV Detector™ and UltraTEV Plus+™ handheld instruments, to detect PD activity.
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Both ultrasonic and TEV sensors are used.
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The magnitude of the PD is displayed along with a simple traffic light indicating the level of PD activity detected. Green indicates no significant discharge, amber indicates some activity, and red warns the activity is at a level that warrants further investigation.
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Operators can use the default factory set threshold levels, or set their own.
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- PD Comparative Measurement: Operators have a range of options:
- Measure the surface PD activity using the ultrasonic mode, and compare the result with those taken from other similar assets.
- Listen to the surface PD activity from the audio output.
- Take TEV readings of internal PD activity at various points on the asset.
- Cable PD Activity:
- PD activity in cables is measured using a plug-in Radio Frequency Current Transformer (RFCT)
- Results are displayed in pico Coulombs (pC) as numerical values.
- PD Activity Recording:
- All of the measurements taken by the UltraTEV Locator™, including the audio output, can be saved to the system’s internal memory. The saved data can be downloaded via the USB port to a memory device.
- PD Location:
- The files can then be read directly into a spreadsheet for inclusion in reports, etc.
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- TEV:
- Sensor: Capacitive
- Measurement Range: 0 – 60dBmV
- Resolution: 1dB
- Max Pulses/Cycle: 2216
- Min Pulse Rate: 10Hz (rolling displays only)
- Precedence: 0.3ns equivalent to 10cm
- Discharge Pattern Phase Reference: Optical or plug-in
- Ultrasonic:
- Measurement Range: -7dBμV to 68dBμV
- Resolution: 1dB
- Accuracy: ±1dB
- Transducer Sensitivity: -65dB (0dB = 1volt/μbar RMS SPL)
- Transducer Center Frequency: 40 kHz
- Transducer Diameter: 16mm
- Heterodyning Frequency: 38.4 kHz
- Cable PD:
- Sensor: RFCT
- Measurement Range: 0 – 25,000pC
- Resolution: 98pC
- Accuracy: ±98pC
- Min Pulse Rate: 10Hz
- Hardware:
- Enclosure: Self-colour injection moulded plastic case
- Indicators: Colour back-lit LCD, Charging indicator LED
- Controls: Touch screen
- Power Supplies:
- Internal Batteries: 3.7V 27.2Ah Lithium-Ion
- Typical Operating Time: approx. 13 hours
- Battery Conservation: Automatic low battery voltage ‘switch off’
- Please feel free to contact for detailed specifications, accessories, software and options.
- TEV: