Name: Megger TTRU1 Handheld Transformer Turns Ratiometer - mme-ae
Brand: Megger
SKU: 83389

Megger TTRU1 Handheld Transformer Turns Ratiometer

The TTRU1 is Megger’s newest handheld transformer turns ratiometer. Alongside standard polarity validation and turns ratio tests, the TTRU1 can also measure short-circuit impedance (leakage reactance) with a single connection. Using color-coded leads, clamps, and customizable on-screen vectors that correspond to the transformer nameplate, the straightforward setup guarantees accurate results on the first try.

This versatile tool goes beyond the basic functions of polarity validation and turns ratio testing. One of its standout features is the ability to measure short-circuit impedance, also known as leakage reactance, using the same single connection setup. This integration simplifies the testing process and reduces the time technicians spend in the field.

The TTRU1 ensures ease of use through its intuitive design. It features colour-coded leads and clamps, as well as customisable on-screen vector diagrams. These diagrams are tailored to match the specific transformer nameplate being tested, guiding technicians through the setup process. This careful design consideration helps avoid common errors, ensuring accurate results on the first attempt.

Another notable feature of the TTRU1 is its impressive battery life. Capable of performing up to 1000 turns ratio tests on a single charge of its NiMH AA battery, this tool is ideal for extensive fieldwork. Recharging is straightforward and versatile; the unit can be connected to any standard USB wall charger or a PC. When connected to a computer, the TTRU1 not only recharges but also offers additional functionalities. Users can download test results, access the user guide, and view data sheets, making it a comprehensive tool for transformer testing and data management.

Megger TTRU1 Key Features

Auto screen dimming and power off
Instrument self-check
Belt loop carry bag
Microsoft® Excel® export
Customisable tranformer vector list and voltages
Guided three-phase tranformer tests
PowerDB import
Phase deviation

Megger TTRU1 Specifications

Feature	Specification
Input power	6 x IEC LR6 1.5 V alkaline (AA)
	6 x IEC HR6 1.2 V NiMH rechargeable (AA)
Battery life	1000 TTR tests on a single charge
	Storage: 1+ years NiMH, 5+ years alkaline
Battery charging	USB-C when set to NiMH batteries
	Protection against alkaline charging
PowerEx PRO NiMH battery charging	0 to 45 °C
Output	Voltage: Single phase, 1-50 V
	Current: 0.1 mA – 1 A
	Frequency range: 40 – 480 Hz
Regulatory	Safety: IEC 61010-1:2010 + AMD1:2016
	EMI/EMC: IEC 61326-1:2012
	RoHS2: EN50581
	Vibe/Shock: MIL-STD-810G
	Ingress: IP54
Transformer testing standards	IEEE C57.152-2013
	IEC 60076-1:2011
	AS/NZS 6076 1:2014
	CIGRE 445 2011
	GOST 3484.1-88
Dimensions	22.8 x 10.5 x 7.5 cm / 8.98 x 4.1 x 2.95 in
Weight	1 kg / 2.2 lbs
Case	Heavy duty over-molded case with built-in connection for hook strap
	Carry case with quick start guide, belt loop hook, and pouches for included lead set and accessories
Internal/external data storage	Up to 10 custom vector storage
	Up to 10,000 sets of single phase results internal storage
	Transferable via USB 2.0 drive
	USB-C connection to PC (EXP ONLY)
Communication/control software	USB Interface for PC download with custom GUI
Display	Full colour 88 mm (3.5 in) 320 x 240 px Hi-bright LCD screen with ‘auto dim’ and ‘auto off’ to preserve battery life
Printer (optional)	51 mm (2 in) thermal printer
	Prints all measurement data displayed on GUI
Environmental	Operating: -20 ° to 50 °C (-4 ° to +122 °F)
	Storage: -30 ° to 70 °C (-22 ° to +158 °F)
	Relative humidity: 0-90 %, non-condensing
TTR	Turns ratio measurement methods: Single phase step up, Single phase step down
Turns ratio range and accuracy	Step down excitation:
	25-50 V: ±0.05 % (0.8 – 1000), ±0.10 % (1001 – 2000), ±0.30 % (2001 – 15000), ±1.0 % (15000 +)
	1-24 V: ±0.10 % (0.8 – 1000), ±0.20 % (1001 – 2000), ±0.60 % (2001 – 15000), ±2.0 % (15000 +)
	Step up measurement:
	25-250 V: ±0.05 % (0.8 – 200, most Power Tx)
	1-24 V: ±0.10 % (0.8 – 200)
Excitation current resolution	Resolution: 0.1 mA (0.1 mA – 100 mA), 1.0 mA (101 mA – 1000 mA)
Excitation current accuracy	±1 % Reading, ±0.1 mA
Frequency accuracy	±1 % Reading, ±0.1 Hz
Phase range	0 – 360 °
Phase accuracy	±0.05 °
Max voltage output	45 V AC peak
SCI	Impedance measurement methods: Single phase
Impedance measurement range	0.1 Ω – 700 Ω
Impedance accuracy	±1 % reading, ±0.01 %; ±1 % reading, ±0.10 mΩ
Reactance measurement range	0.1 Ω – 700 Ω
Reactance accuracy	±1 % reading, ±0.01 %; ±1 % reading, ±0.10 mΩ
Inductance accuracy	±1 % reading, ±10 µH
Power factor range	0.1 % – 100 %
Power factor accuracy	±5 % reading, ±0.1 %
AC current accuracy	±0.2 % reading, ±0.1 mA

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Brand

Megger

Megger since 1889 is a leading global premium manufacturer of measurement and testing technology. Megger top priority has always been to make your everyday work easier and safer. As such, insulation testers, micro-ohmmeters, and multimeters are among the long line of Megger inventions, making this brand one of the pioneers in the electrical industry. Megger products combine many years of experience and the valued feedback from our global users with the inventiveness and conscientiousness of our product developers. In Germany, we manufacture at three sites, Aachen, and Baunach near Bamberg and Radeburg near Dresden. Other manufacturing locations are based in Sweden, England, and America.

Datasheet

Specifications

Feature	Specification
Input power	6 x IEC LR6 1.5 V alkaline (AA)
	6 x IEC HR6 1.2 V NiMH rechargeable (AA)
Battery life	1000 TTR tests on a single charge
	Storage: 1+ years NiMH, 5+ years alkaline
Battery charging	USB-C when set to NiMH batteries
	Protection against alkaline charging
PowerEx PRO NiMH battery charging	0 to 45 °C
Output	Voltage: Single phase, 1-50 V
	Current: 0.1 mA – 1 A
	Frequency range: 40 – 480 Hz
Regulatory	Safety: IEC 61010-1:2010 + AMD1:2016
	EMI/EMC: IEC 61326-1:2012
	RoHS2: EN50581
	Vibe/Shock: MIL-STD-810G
	Ingress: IP54
Transformer testing standards	IEEE C57.152-2013
	IEC 60076-1:2011
	AS/NZS 6076 1:2014
	CIGRE 445 2011
	GOST 3484.1-88
Dimensions	22.8 x 10.5 x 7.5 cm / 8.98 x 4.1 x 2.95 in
Weight	1 kg / 2.2 lbs
Case	Heavy duty over-molded case with built-in connection for hook strap
	Carry case with quick start guide, belt loop hook, and pouches for included lead set and accessories
Internal/external data storage	Up to 10 custom vector storage
	Up to 10,000 sets of single phase results internal storage
	Transferable via USB 2.0 drive
	USB-C connection to PC (EXP ONLY)
Communication/control software	USB Interface for PC download with custom GUI
Display	Full colour 88 mm (3.5 in) 320 x 240 px Hi-bright LCD screen with ‘auto dim’ and ‘auto off’ to preserve battery life
Printer (optional)	51 mm (2 in) thermal printer
	Prints all measurement data displayed on GUI
Environmental	Operating: -20 ° to 50 °C (-4 ° to +122 °F)
	Storage: -30 ° to 70 °C (-22 ° to +158 °F)
	Relative humidity: 0-90 %, non-condensing
TTR	Turns ratio measurement methods: Single phase step up, Single phase step down
Turns ratio range and accuracy	Step down excitation:
	25-50 V: ±0.05 % (0.8 – 1000), ±0.10 % (1001 – 2000), ±0.30 % (2001 – 15000), ±1.0 % (15000 +)
	1-24 V: ±0.10 % (0.8 – 1000), ±0.20 % (1001 – 2000), ±0.60 % (2001 – 15000), ±2.0 % (15000 +)
	Step up measurement:
	25-250 V: ±0.05 % (0.8 – 200, most Power Tx)
	1-24 V: ±0.10 % (0.8 – 200)
Excitation current resolution	Resolution: 0.1 mA (0.1 mA – 100 mA), 1.0 mA (101 mA – 1000 mA)
Excitation current accuracy	±1 % Reading, ±0.1 mA
Frequency accuracy	±1 % Reading, ±0.1 Hz
Phase range	0 – 360 °
Phase accuracy	±0.05 °
Max voltage output	45 V AC peak
SCI	Impedance measurement methods: Single phase
Impedance measurement range	0.1 Ω – 700 Ω
Impedance accuracy	±1 % reading, ±0.01 %; ±1 % reading, ±0.10 mΩ
Reactance measurement range	0.1 Ω – 700 Ω
Reactance accuracy	±1 % reading, ±0.01 %; ±1 % reading, ±0.10 mΩ
Inductance accuracy	±1 % reading, ±10 µH
Power factor range	0.1 % – 100 %
Power factor accuracy	±5 % reading, ±0.1 %
AC current accuracy	±0.2 % reading, ±0.1 mA