Keeping transformer-rated installations within the operating range recommended by ANSI plays a critical role in the financial health of both utilities and their customers.
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Current and potential transformers rarely have problems, but they can arise, whether due to magnetization of the CT over time, faulty wiring, a closed CT shunt, corrosion on the switches or a bad meter insertion at the socket. When these problems occur, costs quickly add up, and not just to fix the hardware issue.
Not to mention the hassle when it comes time to announce additional billing for backlogs to the customer, or an upward rate adjustment (sometime up to 300%) in order to rectify the situation.
On the other hand, when assessing an installation in response to a high bill complaint, utility companies could discover that they have been over charging their customers. When this happens, damage control is needed. But even after the utility fixes the problem and negotiates the amount to be reimbursed to the customer, the situation will have eroded trust in the company’s services and tarnished its reputation.
These types of problems can easily be detected when servicing a transformer-rated installation by performing CT/PT ratio, burden and admittance tests.
Better safe than sorry!
With good planning, you can manage the risks that stem from these challenges. For instance, performing a full assessment, including ratio, burden and admittance tests on transformer-rated installations upon deployment as part of a routine quality assurance check. Then be sure to include it in your yearly maintenance plan, which is already mandatory in some states. To do so, an easy-to-use testing solution that fits seamlessly into your usual maintenance routine is vital…
Why the XT Series is up to the task?
- Ergonomic design
- Advanced, yet easy to use
- Uncompromised accuracy
In response to the ever-growing need for efficiency and portability, we proudly introduce the ST-3/XT3, the first socket-type transformer-rated site tester with integrated WiFi technology. it’s well-suited to the task and here’s why:
The portability and accuracy of the ST-3/XT3, paired with the advanced, yet intuitive Probewell Connect application is the best solution when it comes to testing transformer-rated installations.
Run all the required tests from a single measurement device weighting only 4.5 lb.
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Power Quality (PQ) | ||
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Real-Time Waveform | ||
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Total Harmonic Distortion | ||
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Phasors | ||
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CT Burden | ||
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CT & PT Ratios | ||
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Admittance | ||
Control it wirelessly from a laptop or mobile device using the Probewell Connect app.
- Quick and easy setup
- Customizable configuration
- Task automation
- Validation of test results at a glance
- Undeniable traceability
- Data-driven insights
- Export report as CSV or PDF
- Rooted at its core is high-performance multiphase energy-metering circuitry.
Compatible input voltage
- From 100 to 480 VAC
Plug & “Play” and read all three phases simultaneously
Uncompromised accuracy
- 3 current sensors up to 20 A
- Typical accuracy of 0.05%
- Maximum accuracy of 0.1%
Main features of the ST-3/XT3 wireless site tester
| COMPATIBLE INSTALLATION | |
|---|---|
| Single-phase | 3S and 4S |
| Polyphase | 5S*, 6S, 8S, 9S, 35S* and 45S* *Adapter required (included) |
| INPUT | |
| Voltage | 100 – 600 VAC |
| Working voltage | 100 – 480 VAC +/- 10% |
| Line frequency | 58-62 Hz |
| Bypass circuit | 20 A (max for CT Rated) |
| Circuit breakers | 2 x 1 A (press-to-reset mechanism) |
| MULTIFUNCTION MEASUREMENTS ACCURACY | |
| RMS current | ±0.1% maximum |
| RMS voltage | ±0.1% maximum |
| Frequency | ±0.1% maximum |
Other advantages of using ultralight XT Series wireless site testers
Manage risk
- Quickly setup the testing device and speedup the assessment process without ever compromising safety.
Minimize human error
- Minimize the time spent doing clerical work and other redundant back-office tasks by automating the reporting process.
Best practices
- Stay “ahead of the game,” saving time and money in the long run. Adopt the ST-3/XT3 as a standard tool for quality assurance.
Probewell Connect
- The advanced, yet simple solution literally at your fingertips. Create reliable reports in CSV or PDF format and share your findings via email.
Want to know more about our wireless meter tester? Get in touch!