三相電表測試系統

METES－電表測試系統
METES 系列為高精度電表測試系統，測量精度最高可達 0.05%，並具備寬廣的測量範圍，可用於單相與三相應用的精密量測。METES 系列電表測試系統主要用於感應式電表及電子式電能表在各種運轉條件下的精度測試。此外，在測試過程中，系統擾動因素例如諧波或閃變對電表量測結果的影響，也可以一併納入考量與分析。
三相電表測試系統
METES 325 是一款專為現場使用設計的測試設備，可涵蓋所有電表相關作業，包括電表安裝、啟用與驗收、維護、單相與三相電能表的校正、電表安裝稽核。本裝置具備強大的內建資料儲存功能，選單式操作介面供使用者選擇功能，並可搭配 KoCoS SmartProbe 技術。
電能表校正功能
METES 325 可校正電表能量與需量 (kVA & kW) 功能，包含：

• True Varmetric 電表或交叉接線 (Cross Connected) 電表的無功電能校正
• 向量法或算術法需量計算方式的電表校正

相量圖
三相電壓及電流訊號的相量圖。
諧波分析

• 電壓與電流諧波棒狀圖：至第 32 諧波
• 各相電壓及電流的總諧波失真
• 各相電壓及電流的示波器顯示

變壓器測試
搭配選配的Smart Probes，可執行以下變壓器及比流器測試：

• 無線高壓比流器比率測試
• 低壓比流器比率測試
• 比流器負載
• 變壓器負載
• 變壓器壓降

內建資料庫

• 儲存測試結果

所有測試結果皆可儲存於儀器內部資料庫，方便日後下載或列印。

• 搜尋功能

使用者可依站點及測試記錄進行搜尋進行過的校正。
即時量測
METES 325可即時量測以下項目︰

• 電壓與電流（含各相相角）
• 各相的有功功率（W）、無功功率（var）、視在功率（VA）、功率因數及三相頻率

功率圖
Displays the four quadrant diagram of P, Q & S
顯示 P、Q、S 四象限功率圖
智慧探頭
METES 325 支援 KoCoS SmartProbe 技術，有各種外置探棒選擇，所有探棒皆具備全量程比率及相位誤差補償。

• SP 10D 量程：0.1, 1及10 A

小型夾式電流感測器包含比率及相位修正曲線補償，專用於比流器二次側使用
最大導體直徑：8 mm
精度：0.2%

• SP 100D 量程：1, 10及100 A

夾式電流感測器包含比率及相位修正曲線補償
最大導體直徑：15 mm
精度：0.2%

• SP 1000FLD 量程：100, 300及1000 A

柔性羅哥斯基 (Rogowski) 電流感測器包含比率及相位修正曲線補償
最大導體直徑：150 mm
精度：0.5%

• SP 2000FLD 量程：200, 600及2000 A

柔性羅哥斯基 (Rogowski) 電流感測器包含比率及相位修正曲線補償
最大導體直徑：150 mm
精度：0.5%

• SP 3000FLD 量程：300, 1000及3000 A

柔性羅哥斯基 (Rogowski) 電流感測器包含比率及相位修正曲線補償
最大導體直徑：150 mm
精度：0.5%

• 精度：0.05%
• 電壓範圍（直接接線）：標準範圍：65, 110, 230, 300 V AC；其他電壓範圍：可依需求客製
• 電流範圍（直接接線）：標準範圍：0.02, 0.1, 1, 2, 5, 10 A AC；其他電流範圍：可依需求客製
• 頻率範圍（基波）：45 – 65 Hz
• 輔助電源：18 – 24 V DC
• 顯示器：480x800；7 吋 TFT 觸控螢幕
• 外殼：堅固 ABS 外殼

METES - Meter testing
Meter test systems with high accuracies of up to 0.05% and a wide measuring range for precise measurements in single- and three-phase applications. The meter test systems of the METES series are used to test the accuracy of Ferraris meters and electronic electricity meters under any operating conditions. The impact of system perturbations such as harmonics or flicker on the meter can be taken into consideration during tests.
Three phase measurement test system
A field instrument specifically designed to cover all aspects of metering installation, commissioning and maintenance activities. Including the calibration of single and three phase energy meters, and meter installation audits. The device features powerful on-board data storage. It uses easy menu driven function / option selection. It also implements the KoCoS SmartProbe technology.
Energy Meter Calibration
The unit is capable of calibrating the energy and maximum demand (kVA & kW) functions of energy meters, including:

• Reactive energy calibration of True Varmetric or Cross Connected energy meters
• Demand calibration of Vectorial or Arithmetic calculating demand meters

Phasor diagram
Phasor diagram of three phase voltage and current signals.
Harmonics

• Bar display of voltage and current harmonics up to the 32nd
• Total harmonic distortion of voltage and current per phase
• Scope display of voltage and current signals per phase

Transformer testing
The following voltage and current transformer tests are available with the optional Smart Probes:

• Wireless HV current transformer ratio
• LV Current transformer ratio
• Current transformer burden
• Voltage transformer burden
• Voltage transformer volt-drop

On-board Database

• Saving of Results

All test results are stored in a database function on-board the Metes 325 for easy access at a later stage for downloading or printing.

• On-board Search

Function The field staff have easy access through search funtions on the Metes 325 to scan saved sites and saved results of calibrations performed.
Instantaneous Measurements
The unit measures the following instantaneous quantities:

• Voltages and Currents, including individual phase angles
• Watt, var, VA and power factor for each phase and three phase Frequency

Power diagram
Displays the four quadrant diagram of P, Q & S
SmartProbes
The METES 325 implements the KoCoS SmartProbe technology in a wide range of external sensors. These sensors are ratio and phase error compensated over their entire measurement range.

• SP 10D Range: 0.1, 1 and 10 A

Miniature clip-on current sensors with ratio and phase correction curves – earmarked for secondary CT work
Maximum conductor diameter of 8mm
Accuracy: 0.2%

• SP 100D Range: 1, 10 and 100 A

Clip-on current sensors with ratio and phase correction curves
Maximum conductor diameter of 15mm
Accuracy: 0.2%

• SP 1000FLD Range: 100, 300 and 1000 A

Flexible Rogowski current sensors with ratio and phase correction curves
Maximum conductor diameter of 150mm
Accuracy: 0.5%

• SP 2000FLD Range: 200, 600 and 2000 A

Flexible Rogowski current sensors with ratio and phase correction curves
Maximum conductor diameter of 150mm
Accuracy: 0.5%

• SP 3000FLD Range: 300, 1000 and 3000 A

Flexible Rogowski current sensors with ratio and phase correction curves
Maximum conductor diameter of 150mm
Accuracy: 0.5%

• Accuracy: 0.05%
• Voltage Range (direct connect): Standard: 65, 110, 230, 300 V ac Other ranges on request
• Current Range (direct connect): Standard: 0.02, 0.1, 1, 2, 5, 10 A ac Other ranges on request.
• Frequency range (fundamental): 45 – 65 Hz
• Auxiliary supply: 18 – 24 V dc
• Display: 480x800 7‘‘ TFT touchscreen
• Housing: Robust ABS case