Power Transformer Testing & Oil Purification Solutions

Turns Ratio and Winding Resistance Analyzer

TWR-250B by DV Power

DV Power’s TWR-B series instruments are three-phase, fully automatic test devices specially designed for winding resistance, on-load tap changer DVtest (DRM), demagnetization, turns ratio, phase shift, and excitation current measurements on transformers. It can also perform winding resistance measurement on any inductive object, such as rotating machines (motors and generators). The resistance measurement can also be performed on resistive test objects.

Multiple AC and DC tests on a three-phase transformer
Test voltages up to 250 V AC, Test currents up to 25 A DC
Battery (built-in battery) or mains powered
Large 10.1” graphical touch screen display
One-time connection to a three-phase transformer
Built-in tap changer control unit, Built-in thermal printer

Applications

The list of instrument applications includes:

• Winding resistance measurement
• Demagnetization
• Turns ratio measurement
• Turns ratio deviation calculation
• Excitation current measurement
• Phase angle measurement
• Automatic vector group detection

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Turns Ratio Test Sets

TRT Series by DV Power

DV Power’s TRT series offers high accuracy, true three-phase testing with advanced features such as accurate phase shift measurement and full auto test stepping through all taps under PC control. The series includes:

TRT33A: Basic model Learn more about TRT33A
TRT63A: 250V model Learn more about TRT63A
TRT400: Features a 7” graphic display and max 430VAC output
TRT500: Equipped with a large 10” display and 500V output Learn more about TRT500

Handheld TRT

Cost-effective and portable, the new handheld models are perfect for padmount and low transformers up to 35KV:

TRT-H: For turns ratio testing Learn more about TRT-H
RMO-H: For winding resistance testing Learn more about RMO-H
TWR-H: Combines both turns ratio and winding resistance tests Learn more about TWR-H

Dynamic OLTC Graphic Test Set

TWA Series by DV Power

The TWA -40D from DV Power (This is a combo 3 phase test set to do fast Winding Resistance test, dynamic OLTC graphic analysis and demagnetization once all testing (DC) is complete. Auto-discharge function for safety. DV Win PC software for test control and review of results and archive/report generation) 3 phase Model TWA 40D [click on TWA-40D pdf] , single phase model RMO-60TD [click on RMO-60TD pdf] now with full auto test stepping through all taps under PC control. New model TWA400 w 7” display and internal memory, and new TWA500 w large 10” display. [click on TWA advanced brochure]

Winding Resistance Test Sets

RMO-T and TWA-25A Series by DV Power

Winding Resistance test set series RMO-T and TWA-25A from DV Power. 3 phase model TWA-25A with quick connections for H and X phases, with demagnetization function. [click on Brochure TWA25A ] and [click on comparison between TWA …. pdf],(Single phase basic model RMO-20T [click on RMO-20T pdf] )Winding resistance with heat run test ability for factory test model RMO-100TT [click on rmo-100TT pdf).

Demagnetize any size transformer with DV Power model DEM60R automatic 3 phase safe demag. (utilizes effective intelligent step down and polarity switch action to safely reduce B-H magnetic curve to non-existent) [click on DEM60R pdf] New feature measures magnetic flux of transformer core!

Frequency Response Analyzer

FRA500 by DV Power

The FRA500 offers swept frequency response analysis with unique abilities to compare files from other SFRA test set vendors. It provides graphic representation to determine mechanical defects in windings. [click on FRA500] brochure.

Transformer Oil Purification Systems

ENERVAC Oil Purification Systems

ENERVAC provides medium to large-scale transformer oil purification systems:

Model 865A: For degasification, drying, and particle filtering. Available in sizes from 50 gph to 3600 gph Learn more about Model 865A.
ENERDry System: For temporary or semi-permanent dryout of transformer oil, continuously removes moisture and offers fine filtration Learn more about ENERDry.
Model E575R: For large-scale oil regeneration, extending transformer oil lifetime with an extremely cost-effective method

Transformer Oil Regeneration Systems

ENERVAC Oil Purification Systems

Large scale Transformer Oil Regeneration System from ENERVAC. Model E575R provides an extremely cost-effective and environmentally acceptable method of extending transformer oil lifetime to over 100 years! In addition to the 865A functions above, It restores used oil to virgin oil properties of optimum acidity and dielectric properties, with unique absorbent material in columns that can be re-activated efficiently. Typical semi-trailer mount with generator option. [click on 575R pdf]