適用純歐姆負載的高精度微歐姆計

最高 600 A，適用純歐姆負載的高精度微歐姆計
PROMET R300 與 PROMET R600 為高精度、高準確度的歐姆計，可提供最高 600 A 的可調測試電流，且測試電流不受供電電壓影響。
本系列量測儀器採用四線式電阻量測法，可滿足最嚴苛的精度要求。先進的電力電子技術搭配堅固的結構設計，確保設備在變電站或工業環境中，無論固定式或可攜式使用，皆具備極高的可靠度。PROMET 歐姆計具備現代化操作介面、ACTAS 測試系統通訊介面及可用於測試平台的外部控制功能。因此在應用上具有高度的彈性與多功能性。

接點系統狀態評估
透過定期量測接點電阻，可準確評估接點系統的健康狀態。使用 PROMET R300 / R600 進行靜態接點電阻量測，可偵測因連接不良所造成的過高轉移電阻。這確保可及早發現維護需求及減少設備停機時間。

最高 600 A 的恆定測試電流
PROMET R300 / R600 採用先進電力電子技術，可產生最高 600 A、完全不受供電電壓影響的恆定測試電流。電阻值透過四線式量測技術，由量測電壓下降來計算。
電壓下降與測試電流皆由高精度量測輸入端量測並可精確測得 µΩ（微歐姆）等級的電阻值。
由於 PROMET 歐姆計可不限時間輸出恆定電流，因此亦可作為電流源使用。

三個量測點的電阻量測
設備具備 3 組電壓量測輸入，可同時在 3 個量測點進行平行量測，例如三個主接點的靜態電阻量測或連接品質評估。

兩側接地情況下的接點電阻量測
受惠於接地電流平行量測技術，即使在設備兩側皆接地的情況下，設備仍可精確量測主接點電阻。使用電流鉗量測接地電流，系統會在計算電阻時自動補償接地電流的影響。不需拆除接地線可令測試作業更快速及減少安全風險。

溫度補償量測
PROMET R300 / R600 支援溫度補償電阻量測。量測點溫度由感測器量測，電阻值自動換算至 20°C 參考溫度。這代表量測結果可直接比較。設備內建溫度補償材料資料庫，而且可按需求擴充。

連接品質評估
由於具備 3 組電壓量測輸入，可簡易快速計算出連接品質因數，例如評估匯流排螺栓接點的連接品質。品質因數定義為接點搭接區域的電阻跟同長度匯流排本體的電阻之比。

與 ACTAS 斷路器測試系統整合
PROMET R300 / R600 內建與 ACTAS 系列測試儀器連接的介面。透過 ACTAS 測試軟體，電阻量測可整合至斷路器測試流程，這代表可自動化測試及對測試結果進行完整分析，而測試結果可直接納入測試報告。

主接點動態電阻量測
搭配 ACTAS 系統使用時，PROMET R300 / R600 可同時對三極每極多個主接點室進行動態接點電阻量測。這代表一次操作即可完成全部接點量測，以減少接線與拆線時間、保證所有接點在相同條件下量測及可直接比較各接點電阻差異。

測試平台用外部控制
設備提供簡易程式控制介面，適合特殊需求，例如使用於測試平台。並支援COM / ActiveX或 .NET環境。

簡單直覺的操作
備有5 吋電阻式觸控螢幕及功能鍵，提供儀器直覺操作及清楚顯示測試參數與結果。另外亦提供聲音提示作為操作回饋。

結果管理與測試報告輸出
PROMET R300 / R600 可直接連接至電腦，透過簡單易用的軟體下載與管理內部儲存資料。結構清晰的測量結果可匯出至 Excel或產出測試報告。

一般說明
高精度歐姆計，具備最高 600 A 的可調測試電流。適用於變電站與工業環境中的固定式及可攜式應用。一組電流輸出與三組電壓量測輸入，可於三個量測點同時量測電阻。搭配 ACTAS 測試系統使用時，可進行靜態與動態主接點電阻量測。
 

電流源
輸出數量	1
測試電流	• PROMET R300：最高 300 A DC • PROMET R600：最高 600 A DC
輸出電壓	5 VDC
電流調整步進	1 A
電壓量測
輸入數量	3
量測範圍	電流: - R300: 100 A, 300 A - R600: 100 A, 300 A, 600 A 電壓: - 20 mV, 200 mV, 2 V - 熱電勢補償
電阻
量測範圍	最高 250 mΩ
量測點 / 結果數	3
精度	≤ 量測範圍的 0.1 %
量測時間 / 電流斜坡
範圍	輸出時間︰最長 999 s 步進時間：1 s
輸入
電流鉗輸入	數量：1 / 範圍：2 VAC/DC
溫度量測輸入	數量：1 型式：雙線式（PT1000） 溫度範圍：-20°C…80°C
二進位輸入	數量：2 / 切換閾值：5…12 VDC (TTL)
輸出
二進位輸出	數量：2 / 切換能力：5…12 VDC (最大 50 mA)
硬體規格
電源供應	85…265 VAC, 47…63 Hz, 120…265 VDC
大電流插座	13 mm
安全插座	4 mm
外殼	19 吋機架式外殼，3U (固定式) 可選配可攜式外殼
尺寸 (W x H x D)	483 x 132.5 x 230 mm
重量	PROMET R300: 7.6 kg PROMET R600: 10.5 kg
顯示與記憶體
顯示器	5 吋高解析度電阻式觸控螢幕
操作	觸控螢幕及 5 個功能鍵
內部記憶體	900 筆測試
介面	RJ 45 (Ethernet), USB-B
環境條件
操作溫度	0°C…50°C
儲存溫度	-20…60°C
相對濕度	5…80%, 不凝結
防護等級	IP 20
安全標準	DIN EN 61010-1 300 V~CAT II
產品標準	DIN EN 61326-1

量測功能

• 純歐姆負載電阻量測
• 兩側接地電阻量測
• 溫度補償電阻量測
• 與 ACTAS 進行靜態及動態電阻量測
• 匯流排模式（電壓觸發）
• 恆定電流源
• 連接品質因數計算
• 電腦/軟體外部控制
• 熱電勢補償
• 電流斜坡定義與執行
• 錯誤接線偵測

Assessing the condition of contact systems
Regular measurements of the contact resistance allow an accurate assessment of the condition of contact systems. Using PROMET R300 / R600, excessively high transfer resistances resulting from poor connections can be identified by measuring the static contact resistance. This ensures that maintenance requirements can be identified at an early stage and down times kept to a minimum.

Constant test currents up to 600 A
PROMET R300 / R600 ohm meters use state-of-the-art power electronics to generate a freely adjustable test current of up to 600 A which is fully independent of the supply voltage. The resistance is determined by measuring the voltage drop using four-wire measuring technology.
Voltage drop and test current are measured via high-precision measurement inputs so that resistances in the μΩ range can be determined with maximum precision.
Because PROMET ohm meters can output currents for an unlimited period of time, they can also be used as current sources.

Determination of resistance at three measurement points
Because the device is equipped with three voltage measurement inputs, parallel measurements can be carried out at three measurement points in order to perform a static measurement of the resistance of three main contacts or assess the quality of connections, for example.

Contact resistance determination with earthing on both sides
Thanks to parallel measurement of the earth current, the resistance can be determined precisely for the main contacts of switchgear devices even with earthing on both sides. The earth current is measured with a current clamp and automatically taken into account by the system during resistance determination. Not only would disconnecting the earth conductor make carrying out tests more complicated, it would also be detrimental to safety.

Measurements with temperature compensation
PROMET R300  /  R600 can determine resistances with temperature compensation. The temperature at the measurement point is measured using a sensor and the resistance value is calculated taking the reference temperature of 20°C into account. This means that values can be directly compared. A database with the parameters necessary for temperature compensation is saved in the device and can be extended as and when needed.

Assessing the quality of connections
Because there are three voltage measurement inputs, the quality of connections such as screw connections on busbars can be determined quickly and easily using the quality factor. The quality factor is defined by the ratio of the resistance of the connection over the overlap length to the resistance of the busbar over the same length.

Integration in circuit breaker testing with ACTAS
PROMET R300 / R600 devices are equipped with interfaces for connection to ACTAS test instruments. Using the ACTAS testing software, resistance measurement can easily be integrated in circuit breaker tests. This makes it simple to automate tests and carry out a comprehensive analysis of the test results. The measured values are used for the evaluation of tests and are included in the test report.

Dynamic resistance determination for main contacts
When used in combination with ACTAS, PROMET R300 / R600 can carry out dynamic contact resistance measurements on three poles and on several main contact chambers per pole simultaneously. This means that the measurement can be carried out on all the contacts of a switchgear device in a single operation. This eliminates time-consuming connection and disconnection procedures and ensures that the measurement is carried out under identical conditions, allowing direct comparison of the contact resistances with one another.

External control for use in test stands
A simple programming interface is also available for special requirements, e.g. for use in test stands. This programming interface can be used in environments which support COM / ActiveX or in .NET environments.

Simple and intuitive operation
The resistive, 5“ touch screen with function keys allows intuitive operation of the measuring device and provides a clear display of test parameters and measurement results. Acoustic signals are an additional source of information and also provide feedback during settings.

Results management and test report output via PC
PROMET R300 / R600 can be connected directly to a PC.  Downloading and managing the data saved in the device is made easy by the user-friendly software. The measurement results, which are displayed in a clearly structured form, can also be exported to an Excel spreadsheet or presented in a test report.

General description 
High-precision ohm meters with an adjustable test current of up to 600 A. For stationary and portable use in switching stations or industrial environments. One current output and three voltage measurement inputs allow the resistance to be measured at three measurement points simultaneously. Used in combination with an ACTAS test system, static and dynamic determination of the main contact resistances is possible.
 

Current source
Outputs, number	1
Test current	• PROMET R300: up 300 ADC •PROMET R600: up 600 ADC
Output voltage	5 VDC
Adjustable step value	1 A
Voltage measurement
Inputs, number	3
Measuring ranges	Current - R300: 100 A, 300 A - R600: 100 A, 300 A, 600 A Voltage - 20 mV, 200 mV, 2 V - Compensation of thermal EMFs
Resistance
Range	up to 250 mΩ
Meas. points/results	3
Accuracy	≤ 0.1% of range
Meas. time/ramps
Range	Output time: up to 999 s  Step width: 1 s
Inputs
Current clamps input	Number: 1  Range: 2 VAC/DC
Temperature input	Number: 1  Model: Two-wire (PT1000)  Temperature range: -20°…80° C
Binary inputs	Number: 2  Switching threshold: 5…12 VDC (TTL)
Outputs
Binary outputs	Binary outputs  Number: 2  Switching capacity: 5…12 VDC / max. 50 mA
Hardware Details
Power supply	85…265 VAC, 47…63 Hz, 120…265 VDC
High-current sockets	13 mm
Safety sockets	4 mm
Housing	19" housing for rack-mounting, 3 U (stationary)  Optional: portable housing
Dimensions	483 x 132.5 x 230 mm
Weight	PROMET R300: 7.6 kg PROMET R600: 10.5 kg
HMI & Memory
Screen	High-resolution, resistive 5" touch screen
Operation	Touch screen, 5 function keys
Internal data memory	Capacity: 900 tests
Interfaces	RJ 45 (Ethernet), USB-B
Environment
Operating temperature	0°C…50°C
Storage temperature	-20…60°C
Relative humidity	5…80%, non-condensing
Degree of protection	IP 20
Safety	DIN EN 61010-1 300 V~CAT II
Product standard	DIN EN 61326-1

Meas. Functions　

• Resistance measurement on ohmic resistances 
• Resistance measurement with earthing on both sides 
• Resistance measurement with temperature compensation 
• Static and dynamic resistance measurement with ACTAS systems 
• BusBar mode (voltage trigger) 
• Constant-current source 
• Determination of the quality factor 
• External control via PC/software 
• Compensation of thermal EMFs 
• Definition and execution of ramps 
• Detection of wrong connections