BWDK-S 系列干式變壓器溫度控制儀是由微處理器構成的智能儀器，它使用三只鉑電阻作傳感器，測量干式變壓 器三相繞組的溫度。根據設定的溫度值，啟停風機進行溫度控制。儀器具有各種聲光報警功能，是保護干式變壓器的 重要裝置。 BWDK-S series of dry-type transformer temperature controller is an intelligent instrument equipped with a microprocessor. It uses three platinum resistances as sensors to measure the temperature of three-phase windings of the dry-type transformer, and start and stop the fan for temperature control according to preset temperature value. With various sound and light alarm functions, the instrument is an important device for protecting the dry-type transformer.
儀器符合 JB/T7631-2005 標準。 The instrument complies with Standard JB/T7631-2005. 儀器具有以下特點： The instrument has features as follows:
儀器可以測量干式變壓器三相繞組的溫度，用 LED 每隔 4 秒循環顯示三相溫度值或定點顯示三相溫度最大值。 It is capable of measuring the temperature of three-phase windings of the dry-type transformer, displaying in turn three-phase temperature values with a LED every 4 seconds or displaying the highest three-phase temperature periodically.
2. 儀器可以用按鍵輸入 4 種溫度設定值。當測量溫度超過各設定值時，分別控制風機啟停、超溫報警、超高溫跳閘等。 溫度設定值可以隨時修改，斷電后不會消失。 Four preset temperature values can be input by keystroke. When the measured temperature exceeds preset values, the instrument will respectively control startup and stop of the fan, over-temperature alarm, ultra-high temperature trip, etc. The preset temperature values can be modified at any time, and will remain after the instrument is switched-off.
3. 儀器具有傳感器斷線故障檢測功能。 The instrument is capable of detecting the broken-line fault of the sensor.
4. 儀器具有風機依設定溫度自動定時啟動和手動啟動功能。儀器可設定 1-250 小時內自動啟動風機 1 分鐘。 The instrument has the function of automatic timing startup and manual startup according to the preset temperature, and can set automatic fan startup for 1 minute within 1-250 hours. 5. 儀器具有溫度歷史最大值記錄功能。 The instrument is capable of remembering the highest temperature ever occurred.
6. 根據使用需要，儀器可以提供數字量或模擬量輸出。 The instrument is capable of providing digital or analog output as required.
7. 儀器面板上有綠色的狀態指示燈，風機運轉指示燈為黃色，而超溫、故障和跳閘狀態指示燈為紅色。 There is a green status indicator light on the instrument panel. The indicator light turns yellow when the fan operates and turns red at the status of over-temperature, fault and trip.
二、技術特性 Technical specifications
1. 儀器連續工作環境：溫度：0 ～ 50℃；相對濕度：小于 90%RH（25℃）。 Conditions for continuous operation of the instrument: Temperature: 0 ～ 50℃ , relative humidity: less than 90%RH（25℃）. 短時間工作環境：溫度：－ 50 ～ 75℃。 Conditions for short-time operation of the instrument: Temperature: － 50 ～ 75℃ .
2. 工作電源：AC220V±10%；頻率 50Hz±4%。儀表保護裝置 5A 熔絲。 Working power supply: AC220V±10%, frequency 50Hz±4%. A 5A fuse for the instrument protector. 3. 溫度測量范圍：－ 50 ～ 200℃。 Temperature measurement range: － 50 ～ 200℃ .
4. 溫度測量準確度：0.5 級。 Temperature measurement precision: Class 0.5. BWDK-S 干式變壓器溫度控制儀 Shengshang BWDK-S Dry-type Transformer Temperature Controller 使用說明書 Operation Instructions 3 5. 顯示方式：LED 每隔 4 秒循環顯示 A、B、C 三相溫度或定點顯示三相溫度的最大值，分辨力為 0.1℃。 Display mode: A LED displays temperature of Phase A, B and C in turn every 4 seconds, or displays the highest three-phase temperature periodically, with resolution being 0.1℃ . 6. 輸出方式：輸出報警、跳閘和傳感器故障，繼電器接點容量 AC250V/10A。 Output mode: Output alarm, trip and sensor fault. Relay contact capacity is AC250V/10A.
7. 啟動風機：控制 4 ～ 6 臺風機，繼電器接點總容量 AC250V/30A。 Fan startup: Control 4-6 fans, and total relay contact capacity is AC250V/30A. 8. 耐壓實驗：2500VAC、60Hz、60 秒。 Withstanding-voltage test: 2500VAC, 60Hz and 60 seconds.
9. 外形尺寸：80（H）×160（W）×135（D）mm3 。 Dimensions: 80（H）×160（W）×135（D）mm3 .
10. 開孔尺寸：77（H）×153（W）mm2 Perforate dimensions: 77（H）×153（W）mm2 .
11. 模擬量輸出：三路 4-20mA，對應 A、B、C 相溫度 0-200℃，或一路 4-20mA 對應 A、B、C 相中最大值溫度 0-200℃， 精度 1%±1 個字，負載電阻≤ 600Ω。 Analog output: Three-line 4-20mA output corresponds with temperature of Phase A, B and C (0-200 ℃ ), or one-line 4-20mA output corresponds with the highest temperature of 0-200℃ among Phase A, B and C. Precision is within 1%±1 and load resistance is ≤ 600Ω.
12. 數字量輸出：RS232 或 RS485 串行通訊接口，采用 Modbus 通訊協議。 Digital output: RS232 or RS 485 serial communication interface, with Modbus Communication Protocol being adopted.
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