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DV Power > 變壓器匝比測試|消磁設備系列

手持式繞組歐姆計

Handheld Winding Ohmmeter RMO-TH Series 型號：RMO-TH

手持式繞組歐姆計RMO-TH單元是DV Power專為測量變壓器繞組電阻和進行變壓器消磁而設計的單相儀器。繞組電阻是通過在繞組上注入直流電流，準確測量繞組上的直流電壓，然後計算電阻為電壓與電流的比值。該裝置產生真正的直流無漣波電流。電流的注入和變壓器磁路中能量的釋放都是自動調節的。

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產品特點產品規格 Features Specifications

手持式繞組歐姆計RMO-TH單元是DV Power專為測量變壓器繞組電阻和進行變壓器消磁而設計的單相儀器。繞組電阻是通過在繞組上注入直流電流，準確測量繞組上的直流電壓，然後計算電阻為電壓與電流的比值。該裝置產生真正的直流無漣波電流。電流的注入和變壓器磁路中能量的釋放都是自動調節的。

RMO-TH有兩個輸出直流源，用於測量變壓器繞組電阻。第一個直流源可以輸出最大2 A的直流，設計用於向變壓器的高壓側繞組注入電流。第二個直流源可以輸出最大10A的直流，用於測試變壓器的低壓側繞組。在測量配電變壓器的繞組電阻時，擁有兩個獨立的直流源特別有用。這些變壓器的匝比很大。正因為如此，高壓繞組和低壓繞組的電阻值差異很大。這就需要對高/低壓側繞組進行不同程度的測試電流。

繞組電阻測試後，RMO-TH可以對變壓器鐵芯進行消磁。消磁過程是完全自動和安全的。

RMO-TH適用對象包括：
- 配電變壓器和變比器、馬達和發電機的繞組電阻測量。
- 配電變壓器和變比器、馬達和發電機的消磁。
RMO-TH由內部鋰離子電池供電。在電池充滿電的情況下，可以進行多達100次測試。電池充電時間為2.5小時。

Battery	Type: Li-Ion, 14.8 V, 2.9 Ah Rechargeable User replaceable
Power Supply Adapter	Input voltage: 90 – 264 V AC, 50/60 Hz Output voltage: 12-19 V DC Output current: 2 A DC
Output DC Source 1	Current: 2 A, 1 A, 500 mA, 100 mA, 50 mA, 10 mA, 5 mA
Output DC Source 2	Current: 10 A, 5 A, 2 A, 1 A, 500 mA
Winding Resistance Measurement	Measurement range: 1 µΩ – 3 kΩ
	Range / resolution: 1 µΩ – 9.999 mΩ 1 µΩ 10.00 mΩ – 99.99 mΩ 0.01 mΩ 100.0 mΩ – 999.9 mΩ 0.1 mΩ 1.000 Ω – 9.999 Ω 0.001 Ω 10.00 Ω – 99.99 Ω 0.01 Ω 100.0 Ω – 999.9 Ω 0.1 Ω 1.000 kΩ – 3.000 kΩ 1 Ω
	Typical accuracy: ±(0.5% rdg + 0.5% F.S.)
Display	LCD 4.8” display, 240 x 128 pixels
Interface	Bluetooth
Internal Memory	100 transformer records Each record contains up to 15 results
Environmental Conditions	Operating temperature：-20 ºC – +55 ºC / -4 ºF – +131 ºF Storage & transportation：-40 ºC – +70ºC / -40 ºF – +158 ºF Humidity:：0% – 95% relative humidity, noncondensing
Dimensions and Weight	Dimensions (W x H x D):170 x 310 x 58 mm / 6.69 x 12.21 x 2.28 in Weight: 1.4 kg / 3.1 lbs
Applicable Standards	Installation/Overvoltage category: II Pollution degree: 2 Safety: LVD 2014/35/EU (CE Conform) Standard EN 61010-1:2010 EMC: Directive 2014/30/EU (CE Conform) Standard EN 61326-1:2013

The handheld winding ohmmeter RMO-TH device is DV Power single-phase instrument specially designed for measuring transformer winding resistance and performing transformer demagnetization. Winding resistance is determined by injecting DC current through a winding, accurately measuring DC voltage across the winding, and then calculating resistance as the ratio of voltage and current. The device generates true DC ripple-free currents. Both the injection of the current and the discharge of energy from the transformer magnetic circuit are automatically regulated.

The instrument has two output DC sources for measuring transformer winding resistance. The first DC source can output a maximum of 2 A DC and is designed for injecting current into the transformer’s high-voltage winding. The second DC source can output a maximum of 10 A DC and is designed for testing the transformer’s low-voltage winding. Having two separate DC sources is especially useful when measuring the winding resistance of distribution transformers. These transformers have a large turns ratio. Because of that, the difference between resistances of high voltage and low voltage windings is very big. This requires different levels of test currents for high-voltage and low-voltage windings.

After the winding resistance test, RMO-TH can demagnetize the transformer core. The demagnetization process is completely automatic and safe.

The list of instrument applications includes:
- Winding resistance measurement of distribution and instrument transformers, motors, and generators
- Demagnetization of distribution and instrument transformers, motors, and generators
RMO-TH is powered by an internal Li-Ion battery. Up to 100 tests can be performed with a fully charged battery. The battery charging time is 2.5 hours.

Battery	Type: Li-Ion, 14.8 V, 2.9 Ah Rechargeable User replaceable
Power Supply Adapter	Input voltage: 90 – 264 V AC, 50/60 Hz Output voltage: 12-19 V DC Output current: 2 A DC
Output DC Source 1	Current: 2 A, 1 A, 500 mA, 100 mA, 50 mA, 10 mA, 5 mA
Output DC Source 2	Current: 10 A, 5 A, 2 A, 1 A, 500 mA
Winding Resistance Measurement	Measurement range: 1 µΩ – 3 kΩ
	Range / resolution: 1 µΩ – 9.999 mΩ 1 µΩ 10.00 mΩ – 99.99 mΩ 0.01 mΩ 100.0 mΩ – 999.9 mΩ 0.1 mΩ 1.000 Ω – 9.999 Ω 0.001 Ω 10.00 Ω – 99.99 Ω 0.01 Ω 100.0 Ω – 999.9 Ω 0.1 Ω 1.000 kΩ – 3.000 kΩ 1 Ω
	Typical accuracy: ±(0.5% rdg + 0.5% F.S.)
Display	LCD 4.8” display, 240 x 128 pixels
Interface	Bluetooth
Internal Memory	100 transformer records Each record contains up to 15 results
Environmental Conditions	Operating temperature：-20 ºC – +55 ºC / -4 ºF – +131 ºF Storage & transportation：-40 ºC – +70ºC / -40 ºF – +158 ºF Humidity:：0% – 95% relative humidity, noncondensing
Dimensions and Weight	Dimensions (W x H x D):170 x 310 x 58 mm / 6.69 x 12.21 x 2.28 in Weight: 1.4 kg / 3.1 lbs
Applicable Standards	Installation/Overvoltage category: II Pollution degree: 2 Safety: LVD 2014/35/EU (CE Conform) Standard EN 61010-1:2010 EMC: Directive 2014/30/EU (CE Conform) Standard EN 61326-1:2013

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手持式繞組歐姆計

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