Contact Information

Transformer Inspection Retrofill Corp.

2704 Normandy Road
Royal Oak, MI 48073


Fax: 248-549-2641

Business Hours:
Monday-Friday 7:30 a.m.-4 p.m.

We accept Visa. We accept MasterCard. We accept American Express.
We accept Cash. We accept Check.



TIR's testing capabilities include high, medium and low voltage testing and calibration.  Our testing and recording meters are regularly calibrated to ensure reliable test results.

TIR technicians are trained and skilled in using and interpreting the test results obtained from our equipment, such as meggering, turns ratio, hi-potential, amp and voltage meters and recorders and harmonics.

It's true of electrical equipment, just as it's true of everything in life...little problems, left unattended, become big problems. That's why so many of our customers call upon TIR to annually inspect their equipment. Such inspections, if done every year, on a timely basis, give us benchmark readings with which to compare at each visit. Many of our tests can be performed on-site, with absolutely no interruption to your operations. Other tests are performed in our state-of-the-art lab. These inspections represent very little in terms of cost to you. But there can be tremendous cost, both in terms of lost productivity and capital expenditure, if you take your equipment for granted. Don’t wait until your equipment looks like this.  A failure waiting to happen.


Your transformer fluids are critical in that they act as both coolant and insulator. Therefore, it's imperative that their integrity be maintained. TIR is a recognized expert at assessing the quality of these fluids, and, if necessary, retrofilling with fluids that exhibit the right chemical makeup to assure the continued proper functioning of your transformer. Of course you could choose to ignore making these assessments. In which case, you'll end up calling someone like TIR to perform much more costly services.
Our laboratory tests fluids to ASTM standards.  Tests include dielectric strength, neutralization (acid) number, interfacial tension, color/clarity, specific gravity, moisture content, dissolved gas and PCB analysis.
Dielectric Strength – The ability to withstand electrical stress
Acid/Neutralization – Acids are formed as by-products of oxidation or sludging and are usually present anytime oil is contaminated.

Dielectric Strength - The ability to withstand electrical stress.

Acid/Neutralization - Acids are formed as by-products of oxidation or sludging and are usually present anytime an oil is contaminated.

Interfacial Tension – The interfacial tension of oil is the force dynes per centimeter required to rupture the oil film existing at an oil–water interface.  When certain contaminates such as, soaps, paints, varnishes and oxidation products are present in the oil.  The film strength of the oil is weakened, thus requiring less force to rupture giving us important information as to the condition of the oil.

Color/Clarity – This test meaningless, in itself, is significant when there is a marked change coupled with the other mentioned test.

Moisture Content – Is simply that, testing for moisture that has been introduced either by defective gaskets, seals or pressure regulators.

Dissolved Gas In Oil Analysis – The primary mechanisms for the breakdown of insulating fluids are heat and contamination. An unacceptable insulation resistance value will tell you only that the insulation’s resistance is not what is should be; it is hard to draw any conclusions as to why the insulation is deteriorating. The standard ASTM tests for insulation fluids will provide information about the actual quality of the oil, but the cause of the oil’s deterioration must be determined by further investigation.  Detection of certain gases in an oil-filled transformer is frequently the first indication of a malfunction.  Dissolved gas in oil analysis is an effective diagnostic tool for determining the problem in the transformer’s operation.

Specific Gravity – Is the final essential property that should be checked. This is simply a ratio of the mass of a given volume of liquid (oil) to the mass of an equal volume of water at specified temperatures.  The test is normally conducted by floating a hydrometer in the liquid and taking the reading at the meniscus.  If the reading would be over 1.0, then the oil probably contains some contaminant-quite possibly askarel (PCB) or silicone; if less than 0.84, then the oil may be paraffinic oil.


For some, it's the repair of a transformer currently in use. For others, it's a used transformer. Still others require new equipment. Regardless of your need, TIR has, in inventory, every piece of equipment necessary for any job we're likely to encounter. From the simplest installations, to the most elaborate new equipment needs our customers might throw at us, we have both the expertise, and the necessary hardware. Tell us what you have in mind. We know you'll be pleased with a TIR solution.

You could call it the ultimate in preventative maintenance. This technology enables us to thermographically analyze electrical equipment. In this way, we can detect problems before they have the chance to cause downtime and its attendant problems, idle workers and loss of revenue. But, like everything else we utilize, our infrared equipment is only as good as the professionals who put it to use. At TIR, our people are even better than the sophisticated tools they use.






We've mentioned our lab before in this piece. Perhaps that's because we realize how critical it is to our success and reputation. We feel comfortable in telling you that we honestly believe that no lab in our industry can do a better job than ours when it comes to the testing and maintenance of transformer fluids, the handling and disposal of PCB's, and all of the EPA compliance services we provide.

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Transformer Inspection Retrofill Corp.
2704 Normandy Road Royal Oak, MI 48073
248-549-4026, 800-722-0060

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