Ex-factory Price INR: 32,000₹
Ex-factory Price USD: 340$
In stock
TRM200
Turns Ratio MeterTRM-200 is a precision transformer turns ratio meter for rapid and reliable testing of turns ratio, polarity, voltage, and current in single-phase transformers.
Key Features
- Fully automatic turns ratio and polarity testing for single-phase transformers.
- Accurate 5-digit resolution with ratio measurement up to 1:1200.
- Fast and precise testing for flexible operation.
- Automatic HT/LT detection for simplified and error-free connections.
- Built-in wrong connection and overcurrent protection.
- Displays turns ratio, polarity, LT voltage, and current instantly.
- Compact, portable, and robust design for lab and field testing.
TRM200 is fast, accurate, and dependable solution for transformer turns ratio testing
The TRM-200 Turns Ratio Meter is a fully automatic instrument developed for quick and precise testing of single-phase transformers. Designed for routine production testing, laboratory verification, and service diagnostics, the TRM-200 measures turns ratio, polarity, LT voltage, and current with speed and reliability. Its compact design, simple operation, and dependable performance make it an essential tool for transformer manufacturers and repair facilities.
The TRM-200 provides accurate 5-digit resolution with measurement capability up to 1:1200 ratio, ensuring reliable verification of transformer winding ratios across a wide range of applications. With dedicated Fast and Precision test modes, users can select between quick testing and higher accuracy based on their requirement. Built-in safety functions such as overcurrent protection and wrong connection detection ensure secure and error-free operation.
Testing Principle
The TRM-200 operates by applying a controlled 36V excitation to the HT winding and measuring the corresponding output from the LT side. The instrument automatically calculates the turns ratio and verifies transformer polarity within seconds. Real-time voltage and current readings are displayed alongside the measured ratio, providing complete diagnostic information during testing.
This intelligent design ensures fast test cycles, stable readings, and repeatable results, reducing operator effort and improving efficiency in production and maintenance environments.
Designed for Industrial and Field Use
Built for practical industrial applications, the TRM-200 features a robust, portable, and lightweight design, making it suitable for both laboratory and field testing. Its simple push-button operation allows quick setup and easy use by technicians and operators alike. Automatic HT/LT detection simplifies connections and reduces the risk of incorrect testing.
With its combination of accuracy, safety, speed, and ease of use, the TRM-200 is an ideal solution for reliable transformer turns ratio and polarity testing in manufacturing, quality control, and service applications.
| Parameter | Specification |
|---|---|
| Power Supply | AC 230V ±10% |
| Parameters Measured | Turns Ratio, Polarity, LT Voltage, Current |
| Ratio Range | Up to 1:1200 |
| Resolution | 5 Digits |
| Excitation Current | 250 mA |
| Accuracy (Up to 200:1) | ±0.1% |
| Accuracy (201:1 to 500:1) | ±0.5% |
| Accuracy (501:1 to 1200:1) | ±1.0% |
| Display | 16 × 2 Jumbo LCD |
| Safety Features | Overcurrent Protection, Wrong HT/LT Detection |
| Test Voltage | 36V on HT Winding |
| Size | 280 × 90 × 280 mm |
| Weight | 3.5 Kg |
⚠ Ensure the instrument is powered OFF before making any connections. Use proper insulated HT/LT leads to avoid electrical hazard.
1. Connect HT terminals of the instrument to HT winding of transformer.
2. Connect LT terminals of the instrument to LT winding of transformer.
3. Connect mains power supply to the instrument.
4. Ensure all connections are tight and correct before switching ON.
Note: Incorrect HT/LT connection may result in wrong readings. Always verify wiring before testing.
- Transformer turns ratio measurement and verification.
- Polarity testing of single-phase transformers.
- Quality control in transformer manufacturing and assembly lines.
- Incoming inspection of power and distribution transformers.
- Production testing of distribution and instrument transformers.
- Fast and precision mode testing for batch production environments.
- R&D and design validation in transformer development laboratories.
- Maintenance and troubleshooting of installed transformers.
What is the TRM200 Turns Ratio Meter used for?
The TRM200 is used to measure the turns ratio, polarity, LT voltage, and excitation current of single-phase transformers for quality control, manufacturing, maintenance, and verification.
What parameters does the TRM200 measure?
The instrument measures transformer turns ratio, polarity, LT voltage, and excitation current.
Can the TRM200 verify transformer polarity?
Yes. The TRM200 displays transformer polarity along with the turns ratio measurement.
How long should I wait after switching on the TRM200?
After power-up, wait approximately 5 to 7 seconds until the display shows “Meter Ready” before starting the test.
How quickly does the instrument display the result?
After pressing the Start button, the measured turns ratio, polarity, LT voltage, and current are displayed within about 2 to 3 seconds.
Can incorrect HT and LT connections affect the reading?
The instrument operates from 230 V AC with a tolerance of ±10%.
What should I do if the reading is outside the specified accuracy range?
Yes. Incorrect HT and LT connections can result in wrong turns ratio and polarity readings. Always verify the connections before testing.
How often should the TRM200 be calibrated?
Check all HT and LT connections, repeat the measurement, and if the error persists, the instrument may require re-calibration or repair, contact Technical support for further assistance.
What are the advantages of using the TRM200?
Periodic calibration is recommended to maintain measurement accuracy and reliable long-term performance.
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