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Three-phase winding resistance ohmmeter for electro-mechanical testing of power, distribution, and instrument transformers
The MTOU3 uses a safe, one-time connection for complete winding resistance assessment of power, distribution, and instrument transformers with automatic adaptive demagnetisation, eliminating the risk of tripping system protection when the transformer is put back into service.
Perform vector confirmation, winding resistance, and demagnetisation tests with the same one-time lead connection.
Guided by color-coded leads and extendable clamps with on-screen vectors that match the transformer nameplate, the easy-to-follow setup ensures the right result the first time - just click start!
Auto vector confirmation before every test ensures that the proper transformer vector is selected.

Unmatched safety and convenience for solar professionals
The CAT III 1500 V/CAT IV 1000 V True-RMS Fluke 283 FC Digital Multimeter and a283 FC True-RMS Wireless Current Clamp set the new standard for technicians in DC environments up to 1500 V. Whether you’re working with a utility-scale solar photovoltaic (PV) array, wind power, an electric railway, or a data center, the Fluke 283 FC has been engineered to enhance safety and increase productivity while giving you accurate, reliable, and repeatable results.
The 283 FC/PV includes CAT III 1500 V DC safety-rated accessories so you can work confidently in higher voltage environments without compromising safety. Staubli MC4 test leads allow you to quickly make reliable, secure connections to modules or strings to test DC voltage up to 1500 V DC. TL175-HV CAT III 1500 V/CAT IV 1000 V rated silicone test leads give you more flexibility when testing voltage, millivoltage, resistance, continuity, or capacitance on inverters, combiner boxes, PV arrays, or individual PV modules. A bright backlit LCD screen and illuminated keypad make it easier to work in both direct and low-light conditions. The included magnetic hanging kit frees up your hands, and the custom hard carrying case protects your investment during transport.
Additional features:

The Fluke 715 Volt mA Calibrator delivers outstanding performance, durability, and reliability in a compact, lightweight tool. Offered in the rugged Fluke 80 Series digital multimeter package, the calibrator measures loop current as well as voltage output. It sources voltage to 200 mV or 20 V, measures loop current (0-20 mA, 4-20 mA) signals with 0 .01 % accuracy, and 1 µA resolution, and measures voltage output process signals from PLCs and transmitters. It can source or simulate 4-20 mA loop current and provides a 24 V loop supply with simultaneous current measurement.
The 715 is also extremely easy to use with a simple push button interface. It features the rugged construction that Fluke tools are known for and is EMI tolerant as well as dust and splash resistant. It also features a removable battery door for quick battery changes after the 18 hours of battery life the 9 V battery provides. And the tool also comes with a protective yellow holster with test lead storage. For added convenience the Fluke 715 is also compatible with the ToolPak magnetic meter hanging system.

Enabling accurate and repetitive tests of high-current breaking devices through adaptive current injection
The SPI500 is a powerful and versatile testing system designed to meet the demanding needs of substation testing. It can handle a wide range of high-current tests, including those for electronic reclosers, circuit breakers, high-speed fuses, and ground fault relays.
With the ability to control up to two SPI500B boosters, the SPI500 can increase its testing capacity by up to three times. Its unique control system ensures accurate and reliable testing, even under changing load conditions.
The SPI500 offers both manual and automatic control options, with the Smart Touch View Interface (STVI) providing easy-to-use manual control and the PC-based control system enabling fully automated testing and report generation.
The SPI500 can test self-powered reclosers like the S&C Tripsaver with the push of one button. Also, the most portable test set for testing breakers under 600 A or for testing Modified Differential Ground Fault schemes (MDGF).


The VLF Sine 37 kV with integrated tan delta is a compact, durable, and highly portable test and diagnostic system designed for medium-voltage (MV) cable networks.
Combining robust performance with practical mobility, the VLF Sine 37 stands out as the most powerful portable unit in its class, capable of testing up to 1.6 μF @ 26 kVRMS, making reliable testing and diagnostics of cables longer than 5 km effortless.
The unit is a truly multifunctional tool. It performs:
Thanks to its smart frequency control, the system automatically adjusts the test frequency based on cable length, ensuring testing even on 15 kV-rated cables up to 25 km long.
As an Authorized Distributor of Merytronic in Indonesia, we, PT Tunas Dielektrika Nusantara, are responsible for providing the best after-sales service for all Merytronic products that we deliver to our customers.
Through our sister company, PT Dynamics Circuit Indonesia, which has been professional since 2013 in servicing and repairing test equipment, including those made by Megger, HV, Phenix, ISA, Baker, and others. We sent two people from PT Dynamics Circuit Indonesia to receive repair and service training on April 21-25, 2025, directly at Merytronic Spain, to provide faster and better repair and after-sales services for all our customers in Indonesia.
"WE ARE AUTHORIZED"

Yes, we have been officially authorized as an authorized service center for Merytronic in Indonesia
Merytronic Authorized Service Center:
PT DYNAMICS CIRCUIT INDONESIA
Jalan P. Tubagus Angke No. 10, Komplek Jelambar Center Blok C11
Grogol Petamburan, Jakarta Barat 11460, Indonesia
www.dynamicscircuit.com
Merytronic Authorized Distributor:
PT Tunas dielektrika Nusantara
Facebook: @tunasdielektrika
Instagram: @tunasdielektrika_nusantara
www.tunasdielektrika.com