TW378274B - Insulation monitoring system - Google Patents

Insulation monitoring system Download PDF

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Publication number
TW378274B
TW378274B TW084104045A TW84104045A TW378274B TW 378274 B TW378274 B TW 378274B TW 084104045 A TW084104045 A TW 084104045A TW 84104045 A TW84104045 A TW 84104045A TW 378274 B TW378274 B TW 378274B
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TW
Taiwan
Prior art keywords
detection
current
circuit
voltage
ground
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TW084104045A
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Chinese (zh)
Inventor
Toshihiko Miyauchi
Original Assignee
Mitsubishi Electric Corp
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Publication of TW378274B publication Critical patent/TW378274B/en

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • G01R31/14Circuits therefor, e.g. for generating test voltages, sensing circuits
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/025Measuring very high resistances, e.g. isolation resistances, i.e. megohm-meters

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Abstract

This invention provides a means to detect the insulation deterioration in a system without interrupting its operation, by measuring the leak current to the ground. The resistance of the system can be determined from the leak current, and the state of insulation deterioration is found. A single-phase AC or DC voltage is superimposed on the power supply of the monitored system. Through the input test voltage and the leakage current to the ground, the insulation resistance of the monitored system can be determined real-time and without interrupting the normal operation. Scheduled maintenance is made easy by the resulting information on the insulation deterioration.

Description

A7 B7 五、發明説明(i ) 〔工業上之利用範圍〕 (請先閱讀背面之注意事項再填寫本頁) 本發明為有關一種在繼缅保持電源供電之狀態下可Μ 監視電路絕緣劣化狀態之絕緣監視系統者。 〔Κ往之技術〕 習知之絕緣監視系統係採用如第10圖所示之將電路由 電源切離以探測絕緣電阻診斷之方法。第10圖中,1為高 電壓系統,2為電源變壓器,3為低電壓系統主電路,4 為低電壓糸統主電路3之主開關,5為低電壓系統主電路3 之接地電阻,其·為經過接地導體5a接線於電源變壓器2之 1線。10為接線於低電壓系統主電路3之第1負載電路, 經濟部智慧財產局員工消費合作社印製 11為該負載電路10之負載電路開關,12為將負載電路10施 予啟閉控制之接點(contactor), 13為負載電路配線,14為 例如電動機等負載,15為負載電路10之接地電阻,其為經 過接地導體15a接線於負載電路之1線。16為用Μ檢測負 載電路10接地電流之例如由零相變流器等所構成之接地電 流檢測裝置,18為保護電動機等負載14之電路保護裝置。 20為接線於低電壓糸統主電路3之第2負載電路,30為第 3負載電路,其構成係與第1負載電路10同樣。 施行電路之低電壓糸統之絕緣劣化診斷時,'必需將低 電壓系統主電路3與包括負載14之負載電路配線13分開探 測絕緣電阻。首先,診斷負載電路配線13之絕緣劣化時, 啟開主電路開闞4、負載電路開關11及負載電路10之接觸 器12等,由此將低電壓糸統主電路3與負載電路配線13切 離。然後,將所切離之負載電路配線13之三相一併Κ絕緣 本紙張尺度適用中國國家標準(CNS ) Α4規格(210X297公釐) 1 37505 A7 B7 經濟部智慧財產局員工消費合作社印製 五、· 發明説明( 2 ) | 電 阻 91探 測 其 與 對 地 間 之 絕 緣 電 阻 而 施 行 絕 緣 劣 化 之 診 斷 1 | 〇 對 於 第 2 負 載 電 路 20 第 3 負 載 電 路 30亦 由 同 樣 構 成 探 1 I 測 絕 緣 電 阻 Μ 診 撕 絕 緣 劣 化 0 /·—^ 請. 1 I 先 1 其 次 ί 診 斷 低 電 壓 系 統 主 電 路 3之絕緣劣化時, 閉合 閎 讀 I 負 載 電 路 10 20 > 30 之 各 負 載 電 路 開 關 11 » 將 低 電 壓 系 統 背 1¾ 之 1 1 主 電 路 30 之 二 相 合 併 9 並 由 絕 緣 電 阻 計 92 探 測 其 與 大 地 間 注 意 事 1 之 絕 tfta. 緣 電 阻 9 由 此 施 行 絕 緣 劣 化 之 診 斷 〇 項 再 填 1 1 ( 發 明 欲 解 決 之 問 題 寫 本 f 頁 1 Μ 往 之 絕 緣 監 視 系 統 係 如 前 所 述 地 啟 開 各 開 關 $ ,使 被 1 I 監 視 電 路 由 系 統 切 離 » 然 後 探 測 絕 緣 電 阻 因 此 需 要 較 多 1 1 I 之 勞 力 與 經 驗 f 且 探 测 後 亦 有 錯 誤 接 線 之 可 能 0 再 者 » 在 ! 1 訂 連 續 蓮 轉 之 電 廠 1由於電廠無法停電, 因此, 僅能等待每 1 1 2 年 之 定 期 檢 査 之 機 會 $ 引 起 長 期 間 無 法 施 行 絕 緣 診 1 1 斷 之 問 題 〇 1 1 本 發 明 係 為 解 決 1-*. 月U 述 問 題 而 創 新 者 9 其 百 的 在 於 提 供 線 一 種 不 必 停 止 被 監 梘 電 路 9 即 可 Μ 經 常 測 量 絕 緣 電 阻 並 即 時 (r e a 1 t 1 m e )把握絕緣劣化狀況, 施行絕緣劣化診斷 1 1 | 之 絕 緣 監 視 % 統 0 1 1 I '〔 解 決 問 題 之 手 段 ] 1 1 本 發 明 申 請 專 利 範 ism 圍 第 1 項 之 絕 緣 監 視 糸 統 包 括 :探 丨 測 電 壓 重 叠 機 構 9 其 為 經 由 接 地 機 構 將 頻 率 不 同 於 -電 源 頻 .1 率 之 测 試 電 壓 重 叠 施 加 於 由 電 源 供 電 之 被 監 視 電 路 ;探測 1 | 同 步 信 號 產 生 機 構 用 產 生 與 探 測 電 壓 同 步 且 具 同 一 周 1 I 期 之 探 測 同 步 信 號 ; 接 地 電 流 檢 測 機 構 ,用Κ檢測流通j 1 1 本紙張尺度適用中國國家標準(CNS〉A4規格(210X297公釐) 2 37505 A7 B7 經濟部智慧財產局員工消費合作社印製 五、發明説明( 3 ) 1 1 被監視電路之接地電路電流 • 探 測 電 流 檢 測 44Μ 機 構 9 使 用 探 1 1 測 同 步 信 從 接 地 電 路 電 流 實 施 同 步 檢 波 » >Λ 檢 測 探 測 電 1 Ί 流 中 與 探 測 電 流 同 一 相 位 之 探 測 電 流 有 效 成 分 9 及 演 算 4*16 愤 | , 請„ 1 I 構 » 用 Μ 將 該 測 試 電 流 有 效 成 分 施 予 積 分 9 並 m 換 成 數 位 先 閲 I | 讀 1 式 撿 測 信 號 ; 而 按 照檢測信號求 出 被 監 視 電 路 之 絕 緣 電 阻 背 面 I | 之 1 以 監 視 控 制 被 監 視 電 路 之 絕 緣 劣 化 狀 況 者 〇 注 意 ¥ 1 本 發 明 申 請 專 利 範 圍第2項之絕緣監視系統包括: 探 項 再 填 1 測 電 壓 重 叠 機 構 其 為 經 由 接 地 機 構 將 頻 率 分 別 與 電 源 頻 寫 f 頁 率 不 同 之 兩 種 探 測 電 壓 重 叠 施 加 於 由 電 源 供 電 之 被 監 視 電 v--- 1 路 接 地 電 路 電 流 檢 測 機 構 t 用 Μ 檢 測 流 通 於 被 監 視 電 路 1 1 之 接 地 電 路 電 流 探 測 電 流 有 效 成 分 檢 測 機 構 > 分 別 從 該 i <.I 接 地 電 路 電 流 檢 測 慨 構 所 檢 知 之 接 地 電 路 電 流 中 檢 測 出 與 訂 探 測 電 壓 相 同 之 頻 率 成 分 > 並 使 用 流 通 於 與 各 探 測 電 壓 相 1 I 對 應 之 探 測 電 流 靜 電 容 量 之 電 流 之 頻 率 依 存 性 % Μ 演 算 並 1 1 1 求 出 與 各 探 测 電 壓 相 同 相 位 之 探 測 電 流 有 效 成 分 9 及 演 算 1 線 補 m 構 9 將 探 測 電 流 有 效 成 分 施 行 積 分 並 轉 換 成 數 位 式 檢 測 nil 信 5K t 而 按 照 檢 測 信 號 求 出 上 述 被 監 視 電 路 之 絕 緣 電 阻 9 1 >x 監 視 控 制 被 監 視 電 路 者 〇 1 1 { 作 用 ] 1 1 本 發 明 甲 請 專 利 範 圍 第 1 項 之 絕 緣 監 視 系 統 係 以 上 述 1 I 方 式 構 成 $ 故 得 使 正 確 之 檢 測 信 號 傳 送 至 監 視 控 制 機 構 I 1 I 9 並 即 時 監 視 被 監 視 電 路 之 m 緣 劣 化 情 況 〇 1 1 Ι 本 發 明 請 專 利 範 圍 第 2 項 之 絕 緣 監 視 系 統 係 >λ 上 述 1 1 方 式 構 成 者 > 故 不 用 藉 由 探 测 電 壓 之 同 步 信 號 施 行 同 步 溏 1 1 本紙張尺度適用中國國家標準(CNS ) A4規格(210X297公釐) 3 37 5 0 5 A7 B7 經濟部智慧財產局員工消費合作社印製 五、發明説明( 4 ) 1 1 波 即 可 檢 測 出 探 測 電 流 有效 成 分, 而 可 Μ 簡 單 的 演 算 求 得 1 絕 緣 電 阻 0 1 C 實 施 例 3 請 I . I 先 1 Μ 下 * 說 明 本 發 明 之實 施 例。 閎 讀 背 1 旃 例 1 丨 注 第 1 圖 為 本 發 明 一 實施 例 之構 成 圖 〇 第 1 圖 中 9 1〜5 意 事 1 項 1 5a i 10 15 15 a , 1 6 , 20 , 30 , 由於與第1 0圖所示之 再 填 1 >λ 往 例 具 有 同 一 或 相 同 機能 1 故省 略 其 說 明 0 6 為 設 置 於 寫 本 頁 f 連 接 負 載 電 路. 10 7 20 9 30之 低 電壓 % 統 電 路 3 > 用 Μ 檢 測 '—^ 1 I 接 地 電 流 * 而 由 例 如 為 零相 變 流器 所 構 成 之 接 地 電 流 檢 測 1 1 機 構 9 18為 保 護 第 1 負 載電 路 1 0之 電 路 保 護 裝 置 9 其 詳 细 1 訂 表 示 於 第 2 圖 0 50為K不同於電源頻率之規定頻率(以 下 1 稱 為 探 測 頻 )將單相交流之絕緣電阻探測電壓(K 下 稱 探 1 1 測 電 壓 )重叠施加之探測電壓重叠機構, 5 1為詳细表示於 1 1 第 3 ΓΒΤ 圖 之 同 步 於 探 測 電 壓以 產 生具 有 同 一 周 期 之 探 測 同 步 線 信 號 之 探 測 電 壓 同 步 信 號產 生 機構 52為 監 視 控 制 機 構 9 Ml 58為 與 連 接 於 接 地 電 流 檢測 機 構6 之 電 路 保 護 裝 置 18相 同 1 I 構 成 方 式 之 電 路 保 護 裝 置。 下 文之 說 明 中 9 經 由 絕 緣 電 阻 1 1 I 或 對 地 容 量 而 流 通 於 接 地電 路 之電 流 稱 為 接 地 電 路 電 流 〇 1 1 探 測 電 壓 重 叠 m 構 50為 串 聯連 接 於 電 源 變 壓 器 2 之 接 1 1 地 導 體 5a 9 產 生 探 測 電 壓Va 9 由此 向 低 電 壓 系 統 主 電 路 3 丨 及 負 載 電 路 10 20 30所組 成 之被 監 視 電 路 等 重 叠 施 加 電 1 1 源 電 壓 〇 探 測 同 步 信 產生 機 構51為 由 : 濾 除 探 測 電 壓 頻 1 1 率 成 分 之 濾 除 機 構 5 1 a , 以及與探測電壓同步且輸出具有 1 本紙張尺度適用中國國家標準(CNS ) A4規格(210X297公釐) 4 37505 A7 B7 經濟部智慧財產局員工消費合作社印製A7 B7 V. Description of the invention (i) [Scope of industrial use] (Please read the precautions on the back before filling out this page) The present invention relates to a method that can monitor the state of circuit insulation degradation while maintaining the power supply status. For insulation monitoring systems. [Kong Technology] The conventional insulation monitoring system uses a method of cutting off the circuit from the power source as shown in Fig. 10 to detect the insulation resistance diagnosis. In Figure 10, 1 is a high-voltage system, 2 is a power transformer, 3 is a main circuit of a low-voltage system, 4 is a main switch of the low-voltage system main circuit 3, and 5 is a ground resistance of the low-voltage system main circuit 3. · It is connected to the 1st line of the power transformer 2 through the ground conductor 5a. 10 is the first load circuit connected to the main circuit 3 of the low-voltage system. It is printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. 11 is the load circuit switch of the load circuit 10. 12 is the connection for the on-off control of the load circuit 10. A contactor, 13 is a load circuit wiring, 14 is a load such as a motor, 15 is a ground resistance of the load circuit 10, which is a line connected to the load circuit via a ground conductor 15a. Reference numeral 16 is a ground current detection device for detecting the ground current of the load circuit 10 using M, for example, a zero-phase converter, and 18 is a circuit protection device for protecting a load 14 such as a motor. 20 is a second load circuit connected to the low-voltage system main circuit 3, and 30 is a third load circuit, and its configuration is the same as that of the first load circuit 10. When performing the insulation degradation diagnosis of the low-voltage system of the circuit, 'the low-voltage system main circuit 3 must be separated from the load circuit wiring 13 including the load 14 to detect the insulation resistance. First, when the insulation degradation of the load circuit wiring 13 is diagnosed, open the main circuit switch 4, the load circuit switch 11, the contactor 12 of the load circuit 10, etc., thereby cutting the low voltage system main circuit 3 and the load circuit wiring 13 from. Then, the three phases of the cut off load circuit wiring 13 are insulated together. This paper is in accordance with the Chinese National Standard (CNS) A4 specification (210X297 mm) 1 37505 A7 B7 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs Explanation of the invention (2) | The resistance 91 detects the insulation resistance between the ground and the ground and diagnoses the degradation of the insulation 1 | 〇 The second load circuit 20 and the third load circuit 30 are also composed of the same probe 1 I measuring the insulation resistance M Diagnose the insulation deterioration 0 / · — ^ Please. 1 I first 1 Second When the insulation degradation of the main circuit 3 of the low-voltage system is diagnosed, close and read I Load circuit 10 20 > 30 of each load circuit switch 11 »Set the low voltage System back 1¾ 1 1 1 Main circuit 30 2 phases merge 9 and the insulation resistance meter 92 detects the tfta between it and the ground. 1 The edge resistance 9 performs the diagnosis of insulation degradation. Then fill in 1 1 (Invention Solve the problem. Write a page f. In the insulation monitoring system, turn on the switches $ as described before, so that the 1 I monitoring circuit is cut off by the system. Then, the insulation resistance is detected. Therefore, more labor is required for 1 1 I. Experience f and there is a possibility of incorrect wiring after detection. 0 more »in! 1 order continuous power plant 1 because the power plant can not power off, so you can only wait for the opportunity of regular inspection every 12 years $ The implementation of the insulation diagnosis 1 1 The problem of breaking 0 01 1 The present invention is an innovator 9 to solve the problems described in 1- *. Month 9 The most important thing is to provide a line without having to stop the monitored circuit 9 to measure the insulation resistance often and Real-time (rea 1 t 1 me) grasp the insulation deterioration status, perform insulation deterioration diagnosis 1 1 | insulation monitoring% system 0 1 1 I '〔solve Means of the problem] 1 1 The insulation monitoring system of item 1 of the patent application for the present invention includes: detecting the voltage overlap mechanism 9 which is a frequency different from the power frequency through the grounding mechanism. 1 rate of test voltage overlap Applied to the monitored circuit powered by the power supply; the detection 1 | synchronization signal generation mechanism is used to generate the detection synchronization signal that is synchronized with the detection voltage and has the same period 1 I period; the ground current detection mechanism uses κ to detect the flow j 1 1 paper size Applicable to Chinese National Standards (CNS> A4 specification (210X297 mm) 2 37505 A7 B7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of the invention (3) 1 1 Ground circuit current of the monitored circuit • Detection current detection 44M agency 9 Use probe 1 1 to measure synchronous signal to perform synchronous detection from the ground circuit current »> Λ Detect the detection current 1 探测 The current in the same phase as the detection current in the detection Active component 9 and calculation 4 * 16 | | „1 I Structure» Use Μ to give the integral of the test current to the integral 9 and replace m with a digital first read I | Read the type 1 detection signal; and follow the detection signal Find the back of the insulation resistance I | 1 of the monitored circuit to monitor and control the insulation deterioration of the monitored circuit. 0 Note ¥ 1 The insulation monitoring system of the second scope of the present patent application includes: The mechanism is to apply two kinds of detection voltages with different frequency and power frequency f from the grounding mechanism through the grounding mechanism to apply to the monitored power supplied by the power supply. V --- 1 ground circuit current detection mechanism Ground circuit current detection current of monitoring circuit 1 1 The effective component detection mechanism > respectively detects the same frequency component as the predetermined detection voltage from the ground circuit current detected by the i < .I ground circuit current detection structure, and uses 1 I Corresponds to the frequency dependency of the current corresponding to the detection current electrostatic capacity% Μ Calculate and calculate the effective component 9 of the detection current 9 and calculate the 1 line compensation m with the same phase as each detection voltage. Structure 9 Integrate and convert the effective component of the detection current Digitally detect the nil signal 5K t and obtain the insulation resistance of the monitored circuit 9 1 > x according to the detection signal. 0 1 1 {Function] 1 1 The insulation monitoring system is constructed in the above 1 I way, so the correct detection signal must be transmitted to the monitoring system. Depending on the control mechanism I 1 I 9 and real-time monitoring of the degradation of the m-edge of the monitored circuit 〇 1 1 Ι The present invention requests the insulation monitoring system of the second item of the patent scope > λ The above 1 1 way constitutes > The synchronization signal of the detection voltage is synchronized. 1 1 This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) 3 37 5 0 5 A7 B7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of the invention (4 ) 1 1 wave can detect the active component of the detection current, and 1 can be calculated by simple calculation. 1 Insulation resistance 0 1 C Example 3 Please I. I first 1 M * * Explain the embodiment of the present invention.背 Read back 1 旃 Example 1 丨 Note 1 is the structure diagram of an embodiment of the present invention. 9 1 ~ 5 Intention 1 in the first picture 1 5a i 10 15 15 a, 1 6, 20, 30, because Refill 1 shown in Figure 10 > λ has the same or the same function as the previous example 1 so its explanation is omitted 0 6 is set on the writing page f to connect the load circuit. 10 7 20 9 30 low voltage% system circuit 3 > Detecting '— ^ 1 I ground current * with M and ground current detection composed of, for example, a zero-phase converter 1 1 mechanism 9 18 circuit protection device 9 for protecting the first load circuit 10 0 details 1 order is shown in the second figure. 0 50 is the detection voltage applied to the single-phase AC insulation resistance detection voltage (K is referred to as 1 1 measurement voltage) when K is different from the power supply frequency (hereinafter referred to as the detection frequency). Overlapping mechanism, 5 1 is shown in detail in 1 1 3rd Γ The detection voltage synchronization signal generating mechanism of the BTT diagram synchronized with the detection voltage to generate a detection synchronization line signal having the same period 52 is a monitoring control mechanism 9 Ml 58 is the same as the circuit protection device 18 connected to the ground current detection mechanism 6 1 I configuration Circuit protection device. In the following description, 9 the current flowing through the grounding circuit via the insulation resistance 1 1 I or the capacity to ground is called the grounding circuit current. 1 1 The detection voltage overlaps m. The structure 50 is a 1 1 ground conductor 5a connected in series to the power transformer 2 9 Generates the detection voltage Va 9 As a result, the low-voltage system main circuit 3 丨 and the load circuit 10 20 30 are superimposed to apply electricity 1 1 source voltage 0 detection synchronization signal generation mechanism 51 for the reason: Filter detection voltage The frequency 1 1 rate component filtering mechanism 5 1 a, and the output voltage is synchronized with the detection voltage and has 1 paper size applicable to China National Standard (CNS) A4 specifications (210X297 mm) 4 37505 A7 B7 Intellectual Property Bureau of the Ministry of Economic Affairs employee consumption Printed by a cooperative

五、發明説明( 5 ) 1 1 同 一 周 期 之探 測 同 步 信 號 I g r S 之 零交比較器(z e r 〇 c r 〇 s s 1 1 C 0 m p a r at 〇 r ) 5 1 b 等 所 構 成 0 Ί 探 測 電 壓 重 叠 擁 構 50可 由 將 CT, PT等一方繞組串聯 接 请> 1 1 線 於 接 地 電 路 而 由 另 —*· 方 繞 組 施 加探測電壓V a之方法, Μ 先 閎 1 .及 經 過 電 容 器 對 接 地 電 阻 流 通 電 流而將探測電壓重曼施 加 讀 背 I 之 I 等 方 法 達 成 百 的 0 注 音 事 1 電 路 保 護 裝 置 1 8為 如 第 2 圖 所示,係由: 濾除機構 項 再 I 18 a , 從包含接地電流檢測機構16所檢測出之 探測 電壓V a 填 寫 本 1 f 之 對 應 探 測 電 流 之 接 地 電 路 電 流 Igi中去除探 測頻 率成分 π 1 1 而 撿 測 探 測 電 流 Ig 1 a * 同 步 檢 波 機構18b ,經 由同 步信號 1 1 傳 送 線 6 1 所 接 收 信 之 探 測 同 步 信 號,將探測電流I g 1 a施 >x 1 .I 同 步 檢 波 Μ 檢 測 探 測 電 流 I g 1 a 中與探測電壓V a同相之 探 訂 1 測 電 流 有 效 成 分 Ig Γ 1 t 積 分 機 m 構 18c,將探測 電流 有效成 1 I 分 Is Γ 1 積 分 而 變 換 為 與 探 測 電 流 有效成分I g r 1成比例之 直 1 1 1 流 之 絕 緣 電 阻 計 測 信 號 $ 演 算 慨 構1 8 d ,將絕 緣電 阻計測 1 信 號 變 換 為 數 位 式 信 號 (K下簡稱檢測信號), 同時將該 值 線 hI: 與 預 先 設 定 之 警 報 界 限 值 及 跳 脫 界限值比較, 超出警報 界 1 限 值 時 > 由 警 報 顯 示 機 構 18f將警報信號輸出 ,超 出跳脫( 1 1 t Γ 1 P )界限值時將跳脫信號向.輸入出機構18g輸出; 以及 傳 1 I 送 子 局 18 e , 將檢測信號經過號傳送線60向監 視控 制機構 i 1 52 輸 出 9 等 所 構 成 0 1 1 譬 報 顯 示 裝 置 18f適於使用螢光顯示管、 EL ^ CRT等 >x 1 1 發 光 顯 示 之 裝 置 f 或 蜂 鳴 器 (b U 2 .zer)、揚聲器(sp e a k e r ) 1 1 等 發 出 與 報 之 裝 置 0 1 I 本紙張尺度適用中國國家標準(CNS ) A4規格(210X297公釐) 5 3 7 5 0 5 A7 B7 經濟部智慧財產局員工消費合作社印製 五、發明説明 ( 6 ) 1 1 監 視 控 制 機 構 52為 設 置 在 離 開 被 監 視 電 路 之 位 置 之 電 1 1 氣 室 9 由 • 將 來 白 電 路 保 護 裝 置 18之 檢 測 信 號 m η 過 傳 送 線 1 60 接 收 之 傳 送 母 局 52 3 * Μ及具有可記憶檢測信號同時加 /—ν 請 I 1 先 1 Μ 顯 示 之 據 俄 能 及 輸 出 絕 緣 電 阻 特 性 之 捕 慨 能 之 監 視 控 制 裝 置 聞 tt 背 1 52b等所構成。 面 之 1 注 其 次 t 依 據 第 4 圖 說 明 動 作 0 由 串 聯 接 線 於 電 源 變 壓 意 事 1 項 器 2 之 接 地 線 5 a 之 探 測 電 壓 重 叠 抛 m 構 50 9 重 疊 施 加 探 測 電 再 填 1 寫 t 壓 Va 0 被 監 視 電 路 中 t 在 二 相 各 線 上 施 加 對 於 三 相 電 源 電 本 頁 壓 重 叠 探 測 電 壓 後 所 得 之 電 壓 0 對 於 被 監 視 電 路 9 將 對 nta 懕 1 1 於 電 源 三 相 電 壓 之 電 流 與 對 應 於 探 測 電 壓 Va 之 電 流 重 叠 流 1 1 通 〇 對 應 於 該 二 相 電 壓 之 電 流 係 由 負 載 電 流 及 對 懕 於 三 相 - 訂 .1 I 電 壓 之 接 地 電 路 電 流 所 組 成 0 接 地 電 流 檢 測 抛 m 構 所 能 檢 者 為 與 該 三 相 電 壓 相 對 應 之 接 地 電 路 電 流 與 探 測 電 流 0 用 Μ 1 1 I 顯 示 被 監 視 電 路 之 絕 緣 劣 化 狀 況 之 三 相 合 併 式 絕 緣 電 阻 1 1 1 Rg 1為由探測電壓V a及與該探測電壓V a相同之探測電流有 線 效 成 分 Ig iM R g 1 =V a / I g 1之關係求出< 由接地電流檢測機 1' | 構 1 6檢 測 之 接 地 電 路 電 流 濾 除 機 構 1 8 a抽出探測電流, 1 1 並 去 除 電 源 頻 率 成 分 及 被 監 視 電 路 所 產 生 之 雜 訊 成 分 1 即 1 | 可 獲 得 探 測 電 流 Ig 1 a 〇 當 然 9 該 探 測 電 流 Ig 1 a 係 為 經 過 第 I 1 負 載 電 路 10 之 對 地 靜 電 容 量 流 通 並 與 探 測 電 壓 Va 具 有 1 1 I 90 〇 相 位 差 之 充 電 電 流 成 分 Ig C 1 及 經 過 絕 緣 電 阻 R g 1流通 1 Ί 1 並 與 探 測 電 壓 Va 同 相 之 有 效 成 分 Ιε r 1 之 和 0 但 按 照 探 測 同 1 1 步 信 號 18 Γ S ,將 該 探 試 電 流 18 1 a 施 行 同 步 檢 波 時 * 即 可 求 出 1 1 探 測 電 流 有 欢 成 分 Ικ Γ 1 〇 1 本紙張尺度適用中國國家標準(CNS ) A4規格(210X 297公釐) 6 3 7 5 0 5 A7 B7 經濟部智慧財產局員工消費合作社印製 五、發明説明( 7 ) 經 由 將 探 測 電 壓Va 零 交 叉 比 較 器 51b ( 參 照 圖 3) 變 換 為 方 形 波 即 可 產 生 探測 同 步 信 號 I g Γ S 0 藉 由 該 探 測 同 步 信 號 Ig Γ S 對 探 測 電 流 I g 1 a 施 行 同 步 檢 波 9 即 可 獲 得 高 精 確 度 之 探 測 電 流 有 效 成 分I g r 1 〇 探 測 電 流 有 效 成分 Ig Γ 1 藉 由 積 分 機 構 18 c施行積分, 由 演 算 機 構 18d施行A/D 變 換 9 而 變 換 成 與 探 測 電 流 有 效 成 分 I g Γ 1 成 比 例 之 數 位式 撿 測 信 號 S 將 該 撿 測 信 號 由 傳 送 子 局 18 e經過傳送線60向監視控制機構52傳送, 同時, 與預 設 定 之 值 比 較 超過 該 值 時 > 由 警 報 顯 示 機 構 18f施行 警 報 顯 示 〇 再 者 ,檢測信號超出例如無法施行負載電路1 4 之 蓮 轉 之 設 定 值 時 ,即 經 過 輸 入 輸 出 機 構 18 g施行接點1 2 之 啟 開 控 制 〇 監 視 控 制 機 構 52為 由 檢 測 信 號 求 出 絕 緣 電 阻 9 每 在 探 測 時 即 行 記 憶 同 時 顯示 者 ,由此可Μ即時監視絕緣劣化狀 況 0 再 者 * 亦 可 >x 由記 憶 資 料 輸 出 絕 緣 劣 化 特 性 〇 刖 述 說 明 中 係 述 及 第 1負載電路10之診斷, 但第2 負載電路2 0、 k 第 3 負 載 電 路 30亦 同樣 可 由 ·» *-刖 述 說 明 得 Μ 明 瞭 〇 再 者 > 前 述 說 明 為 述 及 負 載 電路 10 20 30 之 診 斷 > 但 含 有 低 電 壓 糸 統 主 電 路 3 之 電 路全 體 合 併 診 斷 可 Μ 使 用 具 有 與 電 路 保 護 裝 置 18同 一 構 成 之電 路 保 護 裝 置 58來 達 成 0 如 此 構 成 之 絕 緣監 視 糸 統 係 將 被 監 視 電 路 之 探 測 電 流 依 據 同 步 信 號 施 予 同步 檢 波 1 並 K 積 分 電 路 及 演 算 機 構 變 換 為 數 位 式 檢 測 信 號, 常 時 輸 入 於 監 視 控 制 m 構 52 > 而 且 監 視 控 制 機 構 52可 設置 於 離 開 被 監 視 電 路 規 場 之 電 氣 室 中 本紙張尺度適用中國國家標準(CNS ) A4規格(210X297公釐) 7 37 5 0 5 請,. 先 閎 讀 背 dr 之 注 意 事 項 再 填 馬 本4 訂 A7 B7 五、發明説明(8 ) ,因此可以將廣範之被監視電路集中於電氣室,而且即時 監視負載電路之絕緣電阻,结果可K定期輸出負載電路之 絕緣劣化特性俾容易推測K後之特性。再者,由於檢測信 號為K數位形式傳送,因此沒有因傳送引起衰減之影響, 而具備可以正確監視之優點。 在此,前述構成中,係為說明之方便而使探測同步信 號產生機構51與電路保護裝置18分開裝設,但如果將探測 同步信號產生機構51組入於電路保護裝置18内亦可Μ施行 相同之動作。 \ 再者,前述構成中,係Μ探測頻率不同於電源電壓頻 率之任意頻率加Κ說明,但一般之負載電路中,多半會發 生頻率高於電源頻率之雜訊電壓,如將探測頻率設定於較 電源頻率高時,將難於完全去除雜訊電壓。由此知,藉由 探測頻率選擇於低於電源頻率,容易去除雜訊電壓,且更 為提高絕緣電阻之檢測精確度。 如前所述,探測頻率Κ低於電源頻率為宜,但在使用 零相變流器作為接地電流檢測機構6, 16時,Μ零相變流 器之靈敏度不降低之程度之頻率較理想;再者,探測電壓 重叠機構50使用CT時,即有頻率愈低則必須使CT增大之條 件,故探測頻率Μ取10〜30Hz之程度較理想,但瀕率在此 範圍Μ外時,本發明亦可實施當無庸赘言。 前述構成係就電源變壓器之負載側繞組為三角接線之 一線接地之情況加Μ說明,但是,負載側繞組為星形结線 時,經由對於連接於中性點之接地線附加探測電壓重叠機 (請先閲讀背面之注意事項再填寫本頁) Ί I — J· I I In · J線一 經濟部智慧財產局員工消費合作社印製 本紙張尺度適用中國國家標準(CNS ) A4規格(210X297公釐) 8 3 7 50 5 A7 B7 五、發明説明(9 ) 構可K同樣動作。再者,前述說明中係Μ被監視電路為接 地系統之情況為例,但對非接地系統將探測電壓用GPT(附 帽比壓器)等重叠時,同樣可Μ診斷。 啻淪例2 實施例1中係將探測頻率設定為不同於電源電壓頻率 之規定頻率,並Μ設定在低於電源電壓頻率俾提高探測電 流之檢測精確度較為理想之例子加Μ揭示。但是,負載電 路包含Μ反相器(inverter)施行頻率控制之電動機時,由 於Μ反相器施行之頻率控制之範圍可由ΙΗζΜ下到100Hz前 後之值。故如果將探測電壓頻率選擇低於電源頻率之值時 ,會發生與負載電路之雜訊電壓頻率一致之情形,而難於 僅檢測探測頻率成分,因此需要使探測頻率高於電源頻率 0 另一方面,反相器多半使用頻率為6 0 0 Hz〜ΙΟΚΗζ程度 之載波,載波中多含高諧波成分,因此有必須使探測電壓 頻率之上限定在載波頻率下限以下。並且,從作為接地電 流檢測機構之零相變流器之檢測靈敏度特性觀之,500Hz Μ上不宜採用。因此,在於被監視電路含有以反相器施行 頻率控制之負載時,探測電壓之頻率宜選擇在150〜500ΗΖ 範圍内之規定頻率,尤其選擇於200Hz前後之值最佳。選 擇此種頻率時,在反相器控制之負載電路中也可Μ確保探 測電流之檢測精確度。其電路之構成可Κ同於第1圖所示 之實施例1情況。 啻_例3 本紙張尺度適用中國國家標準(CNS ) Α4規格(210X297公釐) 9 37505 (請,先閲讀背面之注意事項再填寫本頁) -r- 訂 線 aaia- 經濟部智慧財產局員工消費合作社印製 A7 ____B7_ 五、發明説明(10 ) 在實腌例1及實腌例2中,係就經常對電源電壓重叠 探測電壓Va之情形加Μ說明,但如所週知者,絕緣電阻電 流不需要經常探測,祗需每隔一定之時間探測即可,實施 例3為僅在探測絕緣電阻時才使探測電歷重叠機構50及電 路保護裝置18動作之實施例,其構成揭示於第5圖。 第5圖中,53為監視控制機構,其構成包括:監視控 制裝置53 b,其具有可對向圖1之監視控制裝置52b輸出探 測電壓重曼機構50及電路保護裝置18之動作指令信號之機 能,K及傳送母局53 a,用K發送收該動作指令信號及檢 測信號。54為接收探測電壓重叠機構50之動作指令信號, 並發送探測同步信號Igrs之傳送子局。62為用Μ傳送前動 作指令信號及檢測信號之信號傳送線。該實施例中,由於 動作指令及檢測信號係由傳送線62傳送,因此可能由於信 號發送位置至接收位置之差距產生時間差,但相對地,亦 可Μ經由發送側或接收側執行動作時刻之調整對應。 設成上述之構造時,以作為絕緣監視糸統而言,由於 由監視控制機構53送出之動作指令Κ每隔一定時間施行接 地電路電流之探測Μ求得檢測信號,因此作為監梘系統可 以有效率動作。 啻倫例4 在前述實施例1及實施例2中,係僅使用一種探測頻 率,但是該實施例4為使用電壓相等但探測頻率fl, f2互 異之探测電壓,並檢測對於各探測頻率之對應接地電路電 流,由2個接地電路電流值演算求出探測電流有效成分 10 (請先閲讀背面之注意事項再填寫本頁) ——訂 經濟部智慧財產局員工消費合作社印製 本紙張尺度適用中國國家標準(CNS ) A4規格(210X 297公釐) 3 7 5 0 5 A7 B7 五、發明説明(11)V. Description of the invention (5) 1 1 Zero-crossing comparator (zer 〇cr 〇ss 1 1 C 0 mpar at 〇r) of the detection synchronization signal I gr S in the same cycle 0 构成 The detection voltage overlaps The structure 50 can be connected in series by one winding of CT, PT, etc.> 1 1 wire to the ground circuit and the method of applying the detection voltage V a from the other side of the square winding, M Μ 1 first, and the current flowing through the capacitor to the ground resistance And the method of applying the detection voltage to read the back I and other methods to achieve a hundred zero. Note 1 circuit protection device 18 is shown in Figure 2. It is caused by: filtering out the mechanism item and then I 18 a, from the ground current The detection voltage V a detected by the detection mechanism 16 is filled in 1 f and the detection circuit component I 1 is removed from the ground circuit current Igi corresponding to the detection current, and the detection current Ig 1 a is detected * The synchronization detection mechanism 18 b passes the synchronization signal 1 1 pass The detection synchronization signal of the line 6 1 receives the detection current I g 1 a > x 1 .I synchronous detection M detection detection current I g 1 a detection detection Ig 1 a in phase with the detection voltage V a 1 current measurement active component Ig Γ 1 t integrator m structure 18c, which effectively converts the detection current into 1 I points Is Γ 1 integral and converts it into a straight 1 1 1 current insulation resistance measurement signal $ 1 which is proportional to the effective component of the detection current I gr 1 8 d, convert the insulation resistance measurement 1 signal into a digital signal (hereinafter referred to as the detection signal), and compare the value line hI: with the preset alarm limit value and the trip limit value, when the alarm limit 1 is exceeded > The alarm signal is output by the alarm display mechanism 18f. When the trip (1 1 t Γ 1 P) limit value is exceeded, the trip signal is output to the input and output mechanism 18g; The signal is transmitted to the monitoring and control mechanism i 1 52 through the signal transmission line 60. It is composed of 9 etc. 0 1 1 Device 18f is suitable for the use of fluorescent display tubes, EL ^ CRT, etc.> x 1 1 light-emitting display device f or buzzer (b U 2 .zer), speaker (sp eaker) 1 1 1 I This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) 5 3 7 5 0 5 A7 B7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of the invention (6) 1 1 Monitoring and control agency 52 The electric signal 1 1 is installed at a position away from the monitored circuit. The detection signal m η of the future white circuit protection device 18 passes through the transmission line 1 60 and receives the transmission master station 52 3 * Μ and has a memorable detection signal at the same time. Plus /-ν Please I 1 first 1 M display according to the Russian energy and output insulation resistance characteristics of the monitoring control device Wen tt back 1 52b and so on. Note 1 Secondly, t will be explained in accordance with Figure 4. 0 is connected in series to the power supply to change the voltage. 1 The grounding wire of the item 2 is 5 a. The detection voltage overlaps with m. Structure 50 9 Overlaps the detection power and fills in 1 and writes the t voltage. Va 0 In the monitored circuit, t is the voltage obtained by applying the detection voltage to the three-phase power supply voltage overlap on the two-phase lines. 0 For the monitored circuit 9, the current corresponding to nta 懕 1 1 and the three-phase voltage of the power supply corresponds to The overlapping current of the detection voltage Va 1 1 through 0. The current corresponding to the two-phase voltage is composed of the load current and the opposite three-phase. Order. 1 I voltage of the ground circuit current The tester uses the ground circuit current and detection current corresponding to the three-phase voltage to indicate the insulation deterioration of the monitored circuit with M 1 1 I In addition, the three-phase combined insulation resistance 1 1 1 Rg 1 is calculated from the relationship between the detection voltage V a and the detection current line effect component Ig iM R g 1 = V a / I g 1 & lt The ground current detection mechanism 1 6 detected by the ground current detector 1 '| Structure 16 draws the detection current, 1 1 and removes the power frequency component and the noise component generated by the monitored circuit 1 ie 1 | The detection current Ig 1 a 〇 Of course, the detection current Ig 1 a is a charging current component Ig C 1 and a phase difference between the ground capacitance of the I 1 load circuit 10 and the detection voltage Va. When the insulation resistance R g 1 flows 1 Ί 1 and the sum of the active components Iε r 1 in phase with the detection voltage Va 0, but according to the detection step 1 1 signal 18 Γ S, the detection current 18 1 a is subjected to synchronous detection * Then, the 1 1 detection current has a component Ικ Γ 1 〇1 Zhang scale applies Chinese National Standard (CNS) A4 specification (210X 297 mm) 6 3 7 5 0 5 A7 B7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of the invention (7) By comparing the zero detection voltage Va 51b (see Fig. 3) can be converted into a square wave to generate a detection synchronization signal I g Γ S 0 The detection synchronization signal Ig Γ S can be used to perform a synchronous detection 9 on the detection current I g 1 a to obtain a highly accurate detection The current effective component I gr 1 〇 The detection current effective component Ig Γ 1 is integrated by the integrating mechanism 18 c, and A / D conversion 9 is performed by the calculation mechanism 18 d to be converted into a digital formula proportional to the detection current effective component I g Γ 1. The detection signal S transmits the detection signal from the transmission slave 18e to the monitoring control mechanism 52 via the transmission line 60, and at the same time, when the value exceeds the preset value when compared with a preset value > the alarm display mechanism 18f performs an alarm display. For example, when the detection signal exceeds, for example, the setting value of the load circuit 14 cannot be performed, the opening and closing control of the contact 12 is performed through the input and output mechanism 18 g. The monitoring control mechanism 52 obtains the insulation resistance 9 from the detection signal. Each time the detection is performed, the memory is displayed at the same time, so that the insulation degradation status can be monitored in real time. 0 Furthermore * Or> x The insulation degradation characteristics are output from the memory data. The description of the first load circuit 10 is described in the description. However, the second load circuit 2 0, k and the third load circuit 30 can also be understood from the description of the »» *-description, and clarify it again. ≫ The foregoing description refers to the diagnosis of the load circuit 10 20 30 > but contains low The voltage system main circuit 3 can be combined and diagnosed. The circuit protection device 58 having the same configuration as the circuit protection device 18 can be used to achieve 0. The insulation monitoring system configured as such will be monitored by the circuit. The measured current is applied to the synchronous detection 1 according to the synchronization signal, and the K integration circuit and the calculation mechanism are converted into digital detection signals, which are always input to the monitoring control unit 52 > and the monitoring control unit 52 can be installed at the electrical station away from the field of the monitored circuit. The paper size in the room applies the Chinese National Standard (CNS) A4 specification (210X297 mm) 7 37 5 0 5 Please ,. Please read the precautions for the back dr and then fill in the book 4 A7 B7 V. Description of the invention (8) Therefore, a wide range of monitored circuits can be concentrated in the electrical room, and the insulation resistance of the load circuit can be monitored in real time. As a result, the insulation degradation characteristics of the load circuit can be periodically output. It is easy to estimate the characteristics after K. Furthermore, since the detection signal is transmitted in K-digit form, there is no effect of attenuation due to transmission, and it has the advantage that it can be accurately monitored. Here, in the foregoing configuration, the detection synchronization signal generating mechanism 51 is separately installed from the circuit protection device 18 for the convenience of explanation. However, if the detection synchronization signal generating mechanism 51 is incorporated in the circuit protection device 18, it may be implemented. Same action. \ In addition, in the aforementioned structure, the detection frequency of M is different from the frequency of the power supply voltage plus K, but in general load circuits, noise voltages with frequencies higher than the power supply frequency are likely to occur. For example, if the detection frequency is set to When it is higher than the power frequency, it will be difficult to completely remove the noise voltage. It is known that by selecting the detection frequency to be lower than the power frequency, it is easy to remove the noise voltage, and to further improve the detection accuracy of the insulation resistance. As mentioned above, the detection frequency K is preferably lower than the power frequency, but when using a zero-phase converter as the ground current detection mechanism 6, 16, the frequency at which the sensitivity of the M-zero phase converter does not decrease is ideal; Furthermore, when the CT is used for the detection voltage superimposing mechanism 50, it is necessary to increase the CT even if the frequency is lower. Therefore, the detection frequency M is preferably about 10 to 30 Hz. However, when the near frequency is outside this range M, The invention can also be implemented as a matter of course. The foregoing configuration is explained with reference to the case where the load-side winding of the power transformer is one of the delta wires, but when the load-side winding is a star-shaped wire, a detection voltage superimposing machine is added to the ground wire connected to the neutral point Please read the notes on the back before filling in this page) Ί I — J · II In · J Line One Printed by the Consumers' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs This paper is printed in accordance with China National Standard (CNS) A4 (210X297 mm) 8 3 7 50 5 A7 B7 V. Description of the invention (9) The structure can operate in the same way. Furthermore, in the foregoing description, the case where the monitored circuit is a grounded system is taken as an example. However, when a non-grounded system is superimposed with a GPT (cap-on voltage ratio), etc., the diagnosis can be performed similarly. Example 2 In Example 1, the detection frequency is set to a predetermined frequency different from the frequency of the power supply voltage, and M is set to be lower than the frequency of the power supply voltage. An example is shown in which it is desirable to increase the detection accuracy of the detection current. However, when the load circuit includes a motor whose frequency is controlled by the M inverter, the range of the frequency control performed by the M inverter can be from 1 Hz to 100 Hz. Therefore, if the frequency of the detection voltage is selected to be lower than the frequency of the power supply, it may happen that the frequency of the noise voltage of the load circuit is the same, and it is difficult to detect only the frequency component of the detection. Therefore, it is necessary to make the detection frequency higher than the frequency of the power supply. Most of the inverters use carriers with a frequency of 600 Hz to 10KΗζ. Most of the carriers contain high harmonic components. Therefore, it is necessary to limit the upper limit of the detection voltage to the lower limit of the carrier frequency. In addition, from the perspective of the detection sensitivity characteristics of the zero-phase converter as a ground current detection mechanism, it is not suitable to use it at 500 Hz. Therefore, when the monitored circuit contains a load that is frequency controlled by an inverter, the frequency of the detection voltage should be selected in the range of 150 ~ 500ΗZ, especially the value around 200Hz. When this frequency is selected, the accuracy of the detection current can also be ensured in the load circuit controlled by the inverter. The circuit configuration can be the same as that of the first embodiment shown in FIG.例 _Example 3 This paper size applies Chinese National Standard (CNS) Α4 specification (210X297 mm) 9 37505 (Please read the precautions on the back before filling this page) -r- Ordering line aaia- Employees of Intellectual Property Bureau, Ministry of Economic Affairs Printed by the consumer cooperative A7 ____B7_ 5. Description of the invention (10) In the actual picking example 1 and the second picking example 2, the description of the situation where the power supply voltage overlaps the detection voltage Va is often added. The current does not need to be detected often, but only at certain intervals. Embodiment 3 is an embodiment in which the detection ephemeris overlapping mechanism 50 and the circuit protection device 18 operate only when detecting the insulation resistance, and its structure is disclosed in Section 3. 5 Figure. In FIG. 5, 53 is a monitoring and control mechanism, and its structure includes: a monitoring and control device 53 b, which has an operation command signal capable of outputting a detection voltage to the monitoring and control device 52 b of FIG. 1 and a circuit protection device 18. Function, K and transmitting master station 53a, use K to send and receive the action command signal and detection signal. 54 is a transmission slave that receives the operation instruction signal of the detection voltage overlapping mechanism 50 and sends a detection synchronization signal Igrs. 62 is a signal transmission line for transmitting a pre-operation command signal and a detection signal by using M. In this embodiment, since the operation instruction and the detection signal are transmitted by the transmission line 62, a time difference may occur due to the difference between the signal sending position and the receiving position, but relatively, it is also possible to perform the adjustment of the operation time via the transmitting side or the receiving side. correspond. When the above-mentioned structure is set, as an insulation monitoring system, since the operation command κ sent by the monitoring control mechanism 53 performs detection of the ground circuit current at regular intervals to obtain a detection signal, it can be used as a monitoring system. Efficient action. Example 4 In the foregoing embodiments 1 and 2, only one detection frequency is used, but this embodiment 4 uses detection voltages with equal voltages but different detection frequencies fl, f2, and detects the detection frequencies for each detection frequency. Corresponding to the ground circuit current, calculate the effective component 10 of the detection current from the calculation of the current values of the 2 ground circuits (please read the precautions on the back before filling this page) —— Order the paper printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs to apply this paper China National Standard (CNS) A4 specification (210X 297 mm) 3 7 5 0 5 A7 B7 V. Description of invention (11)

Igri之實施例。 第6圖為選擇2種探測頻率fl、f2,由此檢測探測電 流有效成分Igrl之第4實施例構成圖。其中1〜5、5a、6 、10〜15、15a、20、30、50係相同於實施例1 ,故省略 .其說明。19, 59為電路保護裝置,其具備針對2種探測頻 率fl, f2演算探測電流有效成分IgrM之探測電流檢測機構 。53為監視控制機構,其具備傳送母局53a及監視控制裝 置53b,監視控制裝置53b具備:可記憶檢測信號同時加K 顯示之機能及輸出絕緣劣化特性之機能,亦具備向探測電 壓重簦機構50及電路保護裝置19、59內之探測電流檢測機 構輸出動作指令信號之機能。54為經過信號傳送線62將監 視控制機構53送來之動作指令信號加Μ接收之傳送子局。 其次說明動作。 設監視電路之絕緣電阻為R,對地靜電容量為C,探測 電壓為Va時,頻率fl時之探測電流為Igi〇及頻率f2時之探 測電流為Is2〇,可用Igio及Ig2〇K (1)式,(2)式求得。Example of Igri. Fig. 6 is a configuration diagram of a fourth embodiment in which two kinds of detection frequencies fl and f2 are selected and the effective component Igrl of the detection current is detected. Among them, 1 ~ 5, 5a, 6, 10 ~ 15, 15a, 20, 30, and 50 are the same as those in the first embodiment, and their descriptions are omitted. 19, 59 are circuit protection devices, which have a detection current detection mechanism that calculates the active component IgrM of the detection current for two detection frequencies fl, f2. 53 is a monitoring control mechanism, which includes a transmission master station 53a and a monitoring control device 53b. The monitoring control device 53b has a function that can memorize detection signals and simultaneously display K and output insulation degradation characteristics, and also has a mechanism for detecting voltage. The function of the detection current detection mechanism in 50 and circuit protection devices 19 and 59 to output an operation command signal. 54 is a transmitting slave that receives the operation instruction signal sent from the monitoring control mechanism 53 and receives it through the signal transmission line 62. The operation will be described next. Set the insulation resistance of the monitoring circuit as R, the capacitance to ground as C, the detection current at the frequency of Va, the detection current at the frequency fl and the detection current at the frequency f2 is Is2〇, Igio and Ig20K (1 ) And (2).

Ig 1 〇 = Va/R + j 2 π f ι CVa................................. (1) I g 2 〇 = V a / R + j 2 π f 2 C V a..................... ............ (2) 在此,Va/R = Igri,與頻率無關。 設 2?rfiCVa = Igci, 27rf2CVa = Igc2 時,U)式,(2)式之絕 對值關係成為(3)式,(4)式所示。 (Igi〇)2=(Igri)2+(Igci)2— ........................ ( 3 ) (Ig2〇) 2 = (Igri)2 + (Igci)2........................... ( 4 ) 由(3)式、(4)式可求得(5)式之關係。 本紙張尺度適用中國國家標準(CNS ) A4規格(210 X297公釐) 11 3 7 5 05 (請先閎讀背面之注意事項再填寫本頁)Ig 1 〇 = Va / R + j 2 π f ι CVa .................. (1) I g 2 〇 = V a / R + j 2 π f 2 CV a ................. (2) Here, Va / R = Igri is independent of frequency. When 2? RfiCVa = Igci, 27rf2CVa = Igc2, U), the absolute value relationship of (2) becomes (3) and (4). (Igi〇) 2 = (Igri) 2+ (Igci) 2— .............. (3) (Ig2〇) 2 = ( Igri) 2 + (Igci) 2 .............. (4) can be obtained from (3) and (4) Get the relationship of (5). This paper size applies to Chinese National Standard (CNS) A4 (210 X297 mm) 11 3 7 5 05 (Please read the precautions on the back before filling this page)

、1T 線 經濟部智慧財產局員工消費合作社印製 A7 B7 五、發明説明(12) (Igri)2=(Igi〇)2-(Igci)2 (Igri)2=(Ig2〇)2-(Igc2)2 (I g 1 ο ) 2 - ( I g c 1 ) 2 = ( I g 2 〇 ) 2 - ( I g c 2 ) 2............... ( 5 ) 頻率fl、f2之探測電壓Va相等時,流通於被監梘電路之對 .地電容量C之電流係成為下列(6)式所示之關係。 I g c 1 = I g c 2 ♦ f / f 2 .....................................(6 ) (6) 式之關係代入(5)式整理可得(7)式。 (Ig2〇)2-(Igl〇)2=(IgC2)2[fl-(l/f2)2} (IgC2)2={(Ig2〇)2-(Igl〇)2}/(l-(fl/f2)2...... (7) (7) 式代入(4)式整理可得(8)式。 (Igri)2={(Igi〇)2-(Ig2〇)2(fi/f2)2/{(l-(fi/f2)2} Igri = [{Igi〇-Ig2〇(f i/f2)2}/{l-(fl/F2)2}]0-5…(8) 由(8)式之關係可Μ求出探測電流有效成分Igr。 若依據使用不同頻率之2種探測電壓檢測探測電流有 效成分Uri之本實施例時,與實施例1之電路構成相比較 ,由於不需要探測同步信號產生機構51M及同步檢波機構 18b,故電路结構可Μ簡化。 在上述之構成中,與實施例3同樣地,只要是使探測 電壓重叠機構50及電路保護裝置19, 59内之探測電流檢測 機構僅在探測電流測定時才動作之構成,即可作為絕緣監 視系統有效應用。 啻淪例5 第7圖為使用直流電壓作為探測電壓之實施例。第7 圖中,1〜4, 10〜15, 15a, 20, 30為相同於實施例1,因 本紙張尺度適用中國國家標準(CNS ) A4規格(210 X 297公釐) 1 2 37 50 5 (請先閲讀背面之注意事項再填寫本頁) 訂 J 線,Γ 經濟部智慧財產局員工消費合作社印製 A7 B7 五、發明説明(13) 此省略其說明。70為重叠直流探測電壓Va之探測電壓重叠 機機構。如圖8所示,其為對串聯於接地導體75之電阻體 70a兩端施加直流電壓Vd,並將直流電壓重蠱於被監視電 路。71為設置在負載電路10之探測電流檢測機構,亦即為 .用Μ檢測交流/直流重叠之電流者,具體而言,由DCCT, .霍耳CT等所構成。72為監視控制機構,由傳送母局72a與 監視控制裝置72b所構成。73為用K接收監視控制機構72 送來之探測電壓重叠裝置70動作指令信號之傳送子局。78 為K第9圖詳细表示之電路保護裝置,係由:從電流檢測 機構71所檢測之電流中濾除不需要之信號而檢測出直流探 測電流之漶除機構7 8 a ;將該直流探測電流變換為數位式 檢測信號,並與預先設定之警報界限值與跳脫界限值比較 ,超出警報界限值時,將警報信號向警報顯示機構78f輸 出,又在超出跳脫界限值時,將跳脫控制信號向輸入出機 構78g輸出之演算機構78d; K及將前述檢測信號向前述監 視控制機構72輸出之傳送子局78e等所構成。76為設置在 低電壓糸統主電路3之探測電流檢測機構,其構成與前述 探測電流檢測機構71相同;再者,79為設置於低電壓糸統 主電路3之電路保護裝置,其構成同於前述電路保護裝置 78 ° 並且,第7圖中係揭示將電流檢測機構71及電路保護 裝置7 8設置於負載電路10之情況,但亦可設置於其他負載 電路20, 30,俾將各負載電路之絕緣劣化狀況集中監視。 當然,使用設置於低電壓糸統主電路3之探測電流檢測機 (請先閎讀背面之注意事項再填寫本頁) -r!' 訂 經濟部智慧財產局員工消費合作社印製 本紙張又度適用中國國家標準(CNS ) A4規格(210X297公釐) 13 37 5 0 5 A7 B7 經濟部智慧財產局員工消費合作社印製 五、發明説明(14 ) 構 76及 電 路 保 護 裝 置 79時 t 可 Μ 將 包 含 各 負 載 電 路 之 電 路 全 體 一 併 監 視 0 如 該 實 施 例 所 示 f 探 測 電 壓 使 用 直 流 時 i 與 被 監 視 電 路 之 靜 電 容 量 不 再 有 關 係 ί 而 由 於 探 測 電 壓 所 引 起 之 電 流 僅 為 直 流 探 測 電 流 f 因 此 具 有 電 流 檢 測 機 構 構 成 簡 單 之 優 點 0 宵 陁 例 6 在 前 述 各 實 施 例 中 > 係 將 探 測 電 流 施 行 即 時 探 測 演 算 Μ 監 視 絕 緣 狀 況 之 方 式 但 是 一 般 電 路 •,之 絕 緣 電 阻 值 係 在 長 期 間 內 緩 慢 下 降 > 如 果 由 短 期 間 看 9 則 具 有 偏 移 (d r i ft )特性< >因此, 經由對探測電流檢測機構附加平均 化 處 理 功 能 9 而 將 接 地 電 流 數 據 Μ 一 定 時 間 施 行 平 均 化 處 理 時 9 可 Μ 將 檢 測 精 確 度 更 為 提 升 0 平 均 化 時 間 可 以 考 慮 及 被 監 視 電 路 之 構 成 環 境 負 載 等 各 種 條 件 而 設 定 適 當 時 間 值 0 實 旃 例 7 再 者 9 > >· 刖 述 各 實 施 例 中 9 若 對 監 視 控 制 機 構 52 f 53 $ 72附 加 圖 形 化 處 理 功 能 > 使 隨 時 由 探 測 電 流 檢 測 拠 m 構 傳 送 來 作 為 絕 緣 監 視 用 數 據 之 接 地 電 路 電 流 圖 形 化 9 即 可 Μ 正 確 把 握 絕 緣 劣 化 之 進 行 狀 況 0 再 者 > 使 其 具 有 改 變 並 顯 示 fBl 圆 形 時 間 軸 之 信 號 處 理 功 能 時 • 即 可 Μ 鎖 定 m 緣 劣 化 之 原 因 〇 在 方 法 上 » 由 劣 化 之 原 因 加 Κ 考 量 時 f 可 Μ 推 知 有 水 之 侵 入 白 然 劣 化 N 突 發 事 故 等 各 種 狀 況 〇 如 果 預 先 記 憶 之 各 種 劣 化 原 因 之 各 種 劣 化 曲 線 為 依 據 f 即 可 推 測 所 得 本紙浪尺度適用中國國家標準(CNS ) A4規格(210X 297公釐) 14 37 5 0 5 請, 先 閲 讀 背 之 注 意 事 項 再 填 寫 本 頁 訂 五、發明説明(15) (請先閲讀背面之注意事項再填寫本頁) 曲線相當於那一種劣化模式。再者,關於劣化部位之鎖定 ,設如預先將特定部位之劣化模式記憶時,可以推測其特 定部位。再者,藉由將此等结果予Μ列印輸出,可K在絕 緣劣化之配件更換時,不必再度診斷係屬於那一部位,而 可Μ節省勞力。 ®淪例8 W-» ΜΜ 再者,在前述各實施例中,係由探測電流有效成分診 斷絕緣劣化狀況,但亦可經由此導出探測電流無效成分值 ,由該數據與探測電流有效成分合併而製成圖形,再將高 精確度之絕緣劣化趨向與探測電流有效成分合併製成圖形 ,即可掌握更高精度之絕緣劣化趨向Μ施行劣化原因之推 測、劣化部位之鎖定等。 〔發明之效果〕 經濟部智慧財產局員工消費合作社印製 本發明申請專利範圍第1項之絕緣監視糸統包括:探 測電壓重叠機構,其為經由接地機構將頻率不同於電源頻 率之探測電壓重叠施加於由電源供電之被監視電路;探測 同步信號產生機構,用以產生與探測電壓同步且具同一周 期之探測同步信號;接地電流檢測機構,用以檢測流通於 被監視電路之接地電路電流;探測電流檢測機構,使用探 測同步信號從接地電路電流實施同步檢波,Μ檢測探測電 流中與探測電流同一相位之探測電流有效成分;及演算機 構,用Μ將該探測電流有效成分施予積分,並轉換成數位 式檢測信號;而按照檢測信號求出被監視電路之絕緣電阻 ,>乂監視、控制被監視電路之絕緣劣化狀況,故可即時監 本紙張尺度適用中國國家標準(CNS ) Α4規格(210 X 297公釐) 工5 3 75 05 A7 B7 經濟部智慧財產局員工消費合作社印製 五、發明説明(I6 ) I 視 被 監 視 電 路 之 活 線 狀 態 之 檢 測 電 流 或 絕 緣 電 阻 9 並 可 簡 1 1 1 單 地 從 絕 緣 劣 化 狀 況 預 测 檢 査 更 換 時 機 〇 1 I 本 發 明 申 請 專 利 範 圍 第 2 項 之 絕 緣 監 視 系 統 包 括 探 /—ν I 請、 1 I 測 電 壓 重 叠 機 構 9 其 為 經 由 接 地 機 構 將 頻 率 分 別 與 電 源 頻 先 閲 1 I 讀 | 率 不 同 之 兩 種 探 測 電 壓 重 叠 施 加 於 由 電 源 供 電 之 被 監 視 電 背 © 1 | 之 1 路 » 接 地 電 路 電 流 檢 測 機 構 > 用 >λ 檢 測 流 通 於 被 監 梘 電 路 注 意 1 事 1 之 接 地 電 路 電 流 ; 探 測 電 流 有 效 成 分 檢 測 機 構 9 分 別 從 該 項 再 I 接 地 電 路 電 流 檢 測 m 構 所 檢 知 之 接 地 電 路 電 流 .中 檢 測 出 與 填 寫 本 1 頁 ] 探 測 電 壓 相 同 之. m 率 成 分 9 並 使 用 流 通 於 與 各 探 測 電 壓 相 '—^ 1 1 對 ate 愿 之 探 測 電 流 靜 電 容 量 之 電 流 之 頻 率 依 存 性 來 演 算 並 求 1 1 出 與 各 探 測 電 壓 相 同 相 位 之 探 測 電 流 有 效 成 分 9 及 演 算 機 1 構 ) 將 探 測 電 流 有 效 成 分 施 行 積 分 並 轉 換 成 數 位 式 檢 測 信 訂 .1 號 而 按 照 檢 測 信 m 求 出 上 述 被 監 視 電 路 之 絕 年 緣 電 阻 Μ 監 1 1 視 控 制 被 監 視 電 路 故 可 由 探 測 電 流 有 效 成 分 之 探 測 提 1 I 供 簡 單 的 絕 緣 監 視 系 統 9 而 且 可 Μ 即 時 監 視 探 測 電 流 或 絕 1 緣 電 阻 ί 並 從 絕 緣 劣 化 狀 況 簡 單 地 預 測 檢 査 更 換 時 m 〇 泳 411 C 圖 面 之 簡. 單 說 明 ) 1 1 第 1 圖 表 示 有 關 於 本 發 明 絕 緣 監 視 系 統 實 施 例 1 之 構 1 I 成 圖 0 1 1 第 2 圖 表 示 使 用 於 圖 1 所 示 實 施 例 1 之 電 路 保 護 裝 置 1 | 內 部 構 成 之 方 塊 圖 0 1 第 3 圖 表 示 使 用 於 圖 1 所 示 實 施 例 1 之 探 測 電 壓 重 叠 1 I 機 構 之 構 成 方 塊 圖 0 1 1 1 第 4 圖 說 明 圖 1 所 示 實 施 例 1 之 動 作 說 明 圖 0 1 1 本紙張尺度適用中國國家標準(CNS ) A4規格(210X297公釐) 16 37 5 0 5 A7 B7 經濟部智慧財產局員工消費合作社印製 五、發明説明(17 ) 丨 第5 _ 表 示 本 發 明 絕 緣 監 視 糸 統 實 施 例 3 之 構 成 rm 國 0 1 1 | 第6 圖 表 示 本 發 明 絕 緣 監 視 % 統 實 施 例 4 之 構 成 画 圖 0 1 1 1 第7 圖表示本 發 明 絕 緣 監 視 系 統 實 胞 例 5 之 構 成 回 圖 0 —S 請 1 I 第8 圖 表 示 使 用 於 面 _ 7 所 示 實 施 例 5 之 探 測 電 壓 重 叠 先 閱 1 I ♦ 1 I 機構 之構 成 圖 0 背 面 1 I 之 1 I 第9 國 表 示 使 用 於 圖 7 所 示 實 施 例 5 之 電 路 保 護 裝 置 注 意 I 事 1 之構 成圖 〇 項 再 4 1 第10圖表 示 >λ 往 絕 緣 監 視 糸 統 之 構 成 圖 〇 f 頁 I 〔符 號之 說 明 3 - s__^ 1 1 2 電 源 變 壓 器 1 1 6 接 地 電 流 檢 測 機 構 1 11 負 載 開 關 訂 12 接 點 1 13 負 載 電 路 配 線 1 I 14 負 載 1 It 15 接 地 電 阻 、'i[l ,r 16 接 地 電 流 檢 測 ΑΛΑ m 構 18 電 路 保 護 裝 置 ' 50 探 測 電 壓 重 叠 機 構 51 探 測 同 步 信 號 產 生 機 構 - 52 監 視 控 制 機 構 ~ 52a 傳 送 母 局 53 監 視 控 制 機 構 54 傳 送 子 局 本紙張尺度適用中國國家標準(CNS ) A4規格(210X 297公釐) 3 7 50 5 17 A7 B7 五、發明説明(18 ) 60 信號傳送線 61 同步信號傳送線 62 同步信號傳送線 70 探測電壓重叠機構 71 電流檢測機構 72 監視控制機構 76 接地電流檢測機構 78 負載電路保護裝置 79 電路保護裝置 (請先閱讀背面之注意事項再填寫本頁) tv ! 線 經濟部智慧財產局員工消費合作社印製 本紙張尺度適用中國國家標準(cns ) μ規格⑺ox謙釐) 37 5 0 51. A7 B7 printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs of the 1T line. 5. Description of the Invention ) 2 (I g 1 ο) 2-(I gc 1) 2 = (I g 2 〇) 2-(I gc 2) 2 ............ (5) Frequency When the detection voltages Va of fl and f2 are equal, the current flowing through the pair of monitored circuits. The current of the ground capacitance C becomes the relationship shown in the following formula (6). I gc 1 = I gc 2 ♦ f / f 2 ........... 6) The relationship of formula (6) is substituted into formula (5) to obtain formula (7). (Ig2〇) 2- (Igl〇) 2 = (IgC2) 2 [fl- (l / f2) 2} (IgC2) 2 = {(Ig2〇) 2- (Igl〇) 2} / (l- (fl / f2) 2 ... (7) (7) Substituting the formula (4) into the formula (8). (Igri) 2 = {(Igi〇) 2- (Ig2〇) 2 (fi / f2) 2 / {(l- (fi / f2) 2} Igri = [{Igi〇-Ig2〇 (fi / f2) 2} / {l- (fl / F2) 2}] 0-5 ... (8) From the relationship of the formula (8), the effective component of the detection current Igr can be obtained by M. If the effective component of the detection current Uri is detected based on the use of two types of detection voltages of different frequencies, compared with the circuit configuration of the first embodiment, The detection synchronization signal generating mechanism 51M and the synchronization detection mechanism 18b are not required, so the circuit structure can be simplified. In the above-mentioned configuration, as in the third embodiment, as long as the detection voltage overlap mechanism 50 and the circuit protection devices 19, 59 are provided, The detection current detection mechanism operates only when the detection current is measured, and can be effectively used as an insulation monitoring system. Example 5 Figure 7 shows an example using a DC voltage as the detection voltage. In Figure 7, 1 ~ 4, 10 ~ 15, 15a, 20, 30 are the same as in Example 1, because this paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 1 2 37 50 5 (Please read the notes on the back before filling out this page) Order J line, Γ Printed by Employee Consumer Cooperative of Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Description of invention (13) This description is omitted 70 is a detection voltage superimposing mechanism that overlaps the DC detection voltage Va. As shown in FIG. 8, it applies a DC voltage Vd to both ends of a resistor 70a connected in series to the ground conductor 75 and places the DC voltage on the monitored circuit. 71 is a detection current detection mechanism provided in the load circuit 10, that is, a person who detects an AC / DC overlapping current with M, specifically, constituted by DCCT, Hall CT, etc. 72 is a monitoring control mechanism, It is composed of the transmission master station 72a and the monitoring and control device 72b. 73 is the transmission slave station that receives the operation command signal of the detection voltage overlapping device 70 sent by the monitoring control mechanism 72 with K. 78 is the circuit protection shown in detail in Figure 9 of K The device is composed of: a eliminating mechanism 7 8 a for detecting a DC detection current by filtering an unnecessary signal from the current detected by the current detection mechanism 71; converting the DC detection current into a digital detection signal, and Assume The alarm limit value is compared with the trip limit value. When the alarm limit value is exceeded, the alarm signal is output to the alarm display mechanism 78f. When the trip limit value is exceeded, the trip control signal is output to the input / output mechanism 78g. 78d; K and a transmission slave 78e and the like that output the detection signal to the monitoring control mechanism 72. 76 is a detection current detection mechanism provided in the low-voltage system main circuit 3, and its structure is the same as the detection current detection mechanism 71 described above; further, 79 is a circuit protection device provided in the low-voltage system main circuit 3, and its structure is the same In the aforementioned circuit protection device 78 °, the case in which the current detection mechanism 71 and the circuit protection device 78 are provided in the load circuit 10 is shown in FIG. 7, but it can also be installed in other load circuits 20, 30, and each load Centralized monitoring of the circuit's insulation deterioration. Of course, use the detection current detector installed in the main circuit 3 of the low-voltage system (please read the precautions on the back before filling out this page) -r! ' Applicable to China National Standard (CNS) A4 specification (210X297 mm) 13 37 5 0 5 A7 B7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of the invention (14) Structure 76 and circuit protection device 79 h t M The entire circuit including each load circuit is monitored together. 0 As shown in this example, when the detection voltage uses DC, i is no longer related to the capacitance of the circuit being monitored. The current caused by the detection voltage is only the DC detection current f. Therefore, it has the advantage of a simple structure of the current detection mechanism. Example 6 In the foregoing embodiments, the detection current is subjected to real-time detection calculations, and the insulation condition is monitored. Method, but for general circuits, the insulation resistance value decreases slowly over a long period of time > has a dri ft characteristic if viewed from a short period of time < > Therefore, an average process is added to the detection current detection mechanism Function 9 When the ground current data M is averaged for a certain period of time, 9 can be used to improve the detection accuracy. 0 The average time can be set to an appropriate time value in consideration of various conditions such as the environmental load of the monitored circuit. Example 7 and 9 > > · In each of the embodiments described above 9 if the monitoring control mechanism 52 f 53 $ 72 is added with a graphic processing function > the detection current detection structure is transmitted at any time as the insulation monitoring data The grounding circuit current can be graphically 9 to correctly grasp the progress of insulation degradation. 0> > Make it change and display. Shows the signal processing function of the fBl circular time axis. • You can lock the cause of the degradation of the m edge. 〇 Methodologically »When considering the cause of the degradation, f can infer the invasion of water, white deterioration, and unexpected accidents. Various conditions 〇 If the various degradation curves of various degradation causes memorized in advance are based on f, it can be inferred that the paper scale is applicable to the Chinese National Standard (CNS) A4 specification (210X 297 mm) 14 37 5 0 5 Please read Please fill in this page before ordering. 5. Description of the invention (15) (Please read the notes on the back before filling this page) The curve is equivalent to that degradation mode. Furthermore, regarding the locking of the deteriorated part, it is assumed that when a deterioration pattern of a specific part is memorized in advance, the specific part can be estimated. In addition, by printing these results to M, K can save labor by re-diagnosing which part belongs to the replacement of the parts with insulation deterioration. ® 沦 例 8 W- »MM In addition, in each of the foregoing embodiments, the condition of the insulation degradation was diagnosed by the active component of the detection current, but the value of the invalid component of the detection current can also be derived from this, and the data is combined with the active component of the detection current. By making a pattern, and then combining the high-precision insulation deterioration trend with the active component of the detection current to make a pattern, you can grasp the higher-precision insulation deterioration trend M to estimate the cause of the deterioration, lock the degraded part, and so on. [Effects of the Invention] The insulation monitoring system of the Intellectual Property Bureau Employee Consumer Cooperative of the Ministry of Economic Affairs printed the first scope of the patent application of the present invention includes: a detection voltage overlapping mechanism for overlapping a detection voltage with a frequency different from the power frequency via a grounding mechanism Applied to the monitored circuit powered by a power supply; a detection synchronization signal generating mechanism for generating a detection synchronization signal synchronized with the detection voltage and having the same cycle; a ground current detection mechanism for detecting a ground circuit current flowing through the monitored circuit; The detection current detection mechanism performs synchronous detection from the ground circuit current using the detection synchronization signal, and M detects the detection current effective component of the detection current in the same phase as the detection current; and the calculation mechanism uses M to integrate the detection current effective component, and Converted into digital detection signal; and obtain the insulation resistance of the monitored circuit according to the detection signal, > 乂 monitor and control the insulation degradation of the monitored circuit, so the paper size can be monitored in real time and applicable to China National Standard (CNS) Α4 specifications (210 X 297 mm) Workers 5 3 75 05 A7 B7 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. 5. Description of the Invention (I6) I Depending on the current status of the monitored circuit, the detection current or insulation resistance is 9 and can be simplified. 〇1 I The insulation monitoring system in the second scope of the patent application of the present invention includes a detection / —ν I, please, 1 I voltage measurement overlap mechanism 9 It is a frequency reading and a power supply frequency read through the grounding mechanism 1 I Read | The rate is different Two kinds of detection voltages are superimposed and applied to the monitored electrical back supply powered by the power supply. 1 | of 1 way »Ground circuit current detection mechanism > Use > λ to detect the ground circuit current flowing in the monitored circuit attention 1 matter 1; detection The current active component detection mechanism 9 respectively detects the ground circuit current from this item. The grounding circuit current detected by the m structure is the same as the detection voltage in the page 1]. m The rate component is 9 and it is used to flow with the phase of each detection voltage '— ^ 1 1 The frequency dependence of the current is calculated and calculated. 1 1 Calculate the effective component of the detection current 9 and the computer 1 with the same phase as each detection voltage. Integrate the effective component of the detection current and convert it into a digital detection letter. Test letter m to find the absolute edge resistance M of the above-mentioned monitored circuit. 1 1 The visual control of the monitored circuit can be provided by the detection of the active component of the detection current. 1 I provides a simple insulation monitoring system 9 and can detect the detection current or insulation in real time. 1 edge resistance ί and simple prediction from the insulation deterioration status m 〇 swimming 411 C drawing simple. Single description) 1 1 The first figure shows the structure 1 of the first embodiment of the insulation monitoring system of the present invention. I is a drawing 0 1 1 The second figure shows the circuit protection device 1 used in the first embodiment shown in FIG. 1 | Internal block diagram 0 1 Fig. 3 shows the detection voltage overlap used in the first embodiment shown in Fig. 1 1 Block diagram of the structure of the I mechanism 0 1 1 1 Fig. 4 shows the operation description of the embodiment 1 shown in Fig. 0 0 1 1 This paper size Applicable to China National Standard (CNS) A4 specification (210X297 mm) 16 37 5 0 5 A7 B7 Printed by the Consumers ’Cooperative of Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of the invention (17) 丨 5th _ indicates the implementation of the insulation monitoring system of the present invention The structure of Example 3 rm country 0 1 1 | Figure 6 shows the structure of the insulation monitoring system of the fourth embodiment of the present invention. 0 1 1 1 Figure 7 shows the structure of the insulation monitoring system example 5 of the present invention. S Please refer to the diagram of 1 I. Figure 8 shows the overlap of the detection voltage used in the fifth embodiment shown in Figure _7. 1 I ♦ 1 I Figure of the structure of the mechanism. 0 Back 1 I 1 I The 9th country shows the implementation used in Figure 7 Note for the circuit protection device of Example 5 I. Structure of item 1 Item 0 and then 4 1 Figure 10 shows the structure of lambda to insulation monitoring system 0f Page I [Description of Symbols 3-s __ ^ 1 1 2 Power Transformer 1 1 6 Ground current detection mechanism 1 11 Load switch 12 Contacts 1 13 Load circuit wiring 1 I 14 Load 1 It 15 Ground resistance, 'i [l, r 16 Ground current detection ΑΛΑ m Structure 18 Circuit protection device '50 Detection voltage overlapping mechanism 51 Detection synchronization signal generation mechanism-52 Monitoring control mechanism ~ 52a Transmission master station 53 Monitoring control mechanism 54 Transmission slave station This paper standard applies to China National Standard (CNS) A4 specification (210X 297 male) %) 3 7 50 5 17 A7 B7 V. Description of the invention (18) 60 Signal transmission line 61 Synchronous signal transmission line 62 Synchronous signal transmission line 70 Detection voltage overlap mechanism 71 Current detection mechanism 72 Monitoring control mechanism 76 Ground current detection mechanism 78 Load Circuit protection device 79 Circuit protection device (please read the precautions on the back before filling this page) tv! Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Online Economics The paper standards are applicable to Chinese national standards (cns) μ specifications ⑺ humility) 37 5 0 5

Claims (1)

經濟部智慧財產局員工消費合作社印製 A8 B8 C8 六、申請專利範圍"""— ^ ^ * 1. 一種絕緣監視系統,包括:探測電壓重其為經 由接地機構將頻率不同於電源頻率之探測施加 於由電源供電之被監視電路;探測同步信號產機構, 用以產生與探測電壓同步且具同一周期之探測同步信 號;接地電流檢測機構,用以檢測流通於被監視電路 之接地電路電流;探測電流檢測機構,使用探測同步 信號從接地電路電流實施同步檢波,以檢測探測電流 中與探測電流同一相位之探測電流有效成分;.及演算 微.構,用以將該探測電流有效成分施予積分,並轉換 成數位式檢測信號;及監視控制機構,按照檢測信號 來監視、控制被監視電路者。 2, —種絕緣監視系統,包括:探測電壓重叠機構,其為 經由接地機構將頻率分別與電源頻率不同之兩種探測 電壓重叠施加於由電源供電之被監視電路;接地電路 電流檢測機構,用以檢測流通於被監視路之接地電路 電流;探測電流有效成分檢測機構.,分別從接地電路 電流檢測機構所檢知之接地電路電流中檢測出與探測 電壓相同之頻率成分,並使用流通於與各探測電壓相 對應之探測電流靜電容量之電流之頻率依存性來演算 並求出與探測電壓相同相位之探測電流有效成分;及 演算機構,將探測電流有效成分施行積分並轉換成數 位式檢測信號;及監視控制機構,按照檢測信號以監 視、控制被監視電路者。 (#'先閲讀背面之注意事項再填寫本頁)Printed by A8, B8, C8, Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 6. Scope of Patent Application " " " — ^ ^ * 1. An insulation monitoring system, including: detecting the voltage is different from the power through the grounding mechanism The frequency detection is applied to the monitored circuit powered by the power supply; the detection synchronization signal generating mechanism is used to generate a detection synchronization signal that is synchronized with the detection voltage and has the same cycle; the ground current detection mechanism is used to detect the ground flowing through the monitored circuit Circuit current; the detection current detection mechanism performs synchronous detection from the ground circuit current using the detection synchronization signal to detect the active component of the detection current in the same phase as the detection current in the detection current; and the calculation microstructure is used to make the detection current effective The components are integrated and converted into digital detection signals; and the monitoring and control mechanism monitors and controls the monitored circuit according to the detection signals. 2, an insulation monitoring system comprising: a detection voltage overlapping mechanism for superimposing and applying two types of detection voltages having a frequency different from a power supply frequency to a monitored circuit powered by a power source through a grounding mechanism; a grounding circuit current detection mechanism for In order to detect the ground circuit current flowing on the monitored road, the detection current effective component detection mechanism detects the same frequency component as the detection voltage from the ground circuit current detected by the ground circuit current detection mechanism, and uses the same frequency as the detection voltage. The frequency dependency of the current of the detection current electrostatic capacitance corresponding to the detection voltage is calculated and the effective component of the detection current with the same phase as the detection voltage is calculated; and the calculation mechanism integrates the effective component of the detection current and converts it into a digital detection signal; And monitoring and control mechanism to monitor and control the monitored circuit according to the detection signal. (# 'Read the notes on the back before filling this page) 本紙張尺度適用中國國家標準(CNS ) A4規格(210 X 297公釐) 19 3 7 5 0 5This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) 19 3 7 5 0 5
TW084104045A 1995-02-13 1995-04-25 Insulation monitoring system TW378274B (en)

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JP4167872B2 (en) * 2001-10-04 2008-10-22 株式会社日立産機システム Leakage current monitoring device and monitoring system therefor
KR100740826B1 (en) * 2004-08-05 2007-07-19 김영일 A detection device of insulation resistance for non-interruption of electric power and hot-line
KR101276173B1 (en) * 2006-08-16 2013-06-18 (주)오성메가파워 Insulation Monitoring System
KR101276171B1 (en) * 2006-08-16 2013-06-18 (주)오성메가파워 insulation monitoring system
KR101248144B1 (en) 2011-10-28 2013-03-27 한국전력공사 Apparatus for testing gas insulated transmission line
KR102550747B1 (en) * 2021-01-11 2023-07-05 한국기술교육대학교 산학협력단 Model for detecting leakage current in ess
KR102495562B1 (en) 2022-04-13 2023-02-06 (주)비즈커넥트 Measuring device and method of insulation resistance and capacitance of each phase in live wire state in main circuit of 3-phase 4-wire type electrical equipment

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