關鍵性的套管和局部放電監測解決方案

GE Vernova 最新推出的進階款 Kelman BMT 430 是一種線上診斷系統，可連續監控始終處於高應力下的套管狀況，並在變壓器中產生局部放電 (PD) 活動。它能立即提醒工作人員套管故障情況的變化，並提供有關套管和變壓器的重要健康資訊。
Kelman BMT 430 是一個獨立的系統，但也可以輕鬆地與GE Vernova 的Kelman DGA 900 多種氣體分析裝置整合，提供額外的在線DGA 功能，從而能夠更深入地了解變壓器的整體狀況和變壓器重大故障的根本原因。

關鍵優勢

• 使用單一感測器和分接頭監控套管電容、功率因數（tan delta）和局部放電活動的產品。
• 強大的演算能力、可擴展的輸入/輸出和整合的人機介面相結合，提供了強大可靠的套管監測解決方案。
• 可在現場輕鬆升級為 KELMAN DGA 900 Plus 系統，以獲得更深入、更完整的變壓器監控套件。
• 與 GE 廣受讚譽的Perception™ Perception™ Fleet資產管理軟體完全整合。
• 由一家供應商負責安裝、維修、確保適當的溝通並最大限度地減少行政負擔，從而降低變壓器的總擁有成本。

系統特點

• 系統可以監控多達 3 組 3 支套管：三相變壓器或一組 3 支單相變壓器。
• 內建基於網頁的人機介面，可方便快速地存取即時測量數據。
• 整合 7 吋彩色液晶螢幕，可簡化本機使用者互動和資料視覺化。
• 為本地和遠端通訊提供廣泛的通訊選項。
• 附加感測器的輸入和輸出，包括負載和頂部油溫。

套管分接頭的特點

• 新型設計用於允許對套管進行離線測試，而無需從電壓抽頭中完全卸下套管分接頭。
• 船用級鋁材，可承受 IP66 等級的極端環境條件。
• 突波保護 - 抑制電路，在發生電壓瞬變時始終限制分接頭內的電壓值。
• 故障安全電路可確保在開路和/或突波保護失效時，套管分接頭保持接地。

Kelman BMT 430 變電所監控應用
在下面的應用中，圖 1 顯示 Kelman BMT 430 用於三相變壓器，可以監測一組三支套管和最多三組三支套管。圖 2 顯示 Kelman BMT 430 與備用變壓器一起用於單相變壓器組。

An Essential Bushing and Partial Discharge Monitoring Solution
GE Vernova’s latest and advanced Kelman BMT 430 is on-line system that continuously monitors the condition of the bushings, which are constantly under high stress, and developing partial discharge (PD) activity in the transformer. It will immediately alert personnel of evolving fault conditions with the bushings and provide vital health information on the bushings and the transformer.

The Kelman BMT 430 is a standalone system but can also be easily integrated with a GE Vernova’s Kelman DGA 900 multi-gas analysis unit providing additional on-line DGA capabilities enabling a more in-depth view of the transformer’s overall condition and root cause of major transformer failures.

Key Benefits

• One product monitoring bushing Capacitance, Power Factor (tan delta) and Partial Discharge activity using a single sensor and connection point.
• Enhanced computing power, scalable I/Os and an integrated HMI combine to provide a powerful and reliable bushing monitoring solution.
• Easily upgradeable in the field to a KELMAN DGA 900 Plus system for more in-depth and complete transformer monitoring package.
• Full integration with GE’s acclaimed Perception™ Fleet asset management software.
• One supplier installing, servicing, ensuring proper communication and minimizing administrative burden to lower the total cost of ownership of your transformer

System Features

• System can monitor Monitors up to 3 sets of 3 bushings: 3-phase transformer or a bank of 3 single phase transformers.
• Built-in web-page based HMI for easy and quick access to live measurements.
• Integrated 7” color LCD screen for simplified local user interaction and visualization of data.
• Extensive communication options for local and remote communications.
• Inputs and outputs for additional sensors including load and top oil temperature.

Bushing Adaptor Features

• Designed to allow off-line testing of bushing without completely removing bushing adaptor from voltage tap.
• Marine grade aluminum to withstand extreme environmental conditions rated IP66.
• Surge protection -suppression circuit to always limit voltage within the adapters in case of transients.
• Fail safe circuit ensure the bushing tapping points remain grounded should open circuit and/or surge protection fail.

Kelman BMT 430 Substation Monitoring Applications

In the applications below, diagram 1, shows the Kelman BMT 430 being used on a 3-phase transformer, where they can monitor either one set of three bushings and up to three sets of three bushings. In diagram 2, shows the Kelman BMT 430 is being used on a bank of single-phase transformers along with a spare transformer.