UNI-T UT225A Wireless High & Low Voltage Transformer Turns Ratio Testers
The UNI-T UT225A presents itself as a thoughtfully engineered instrument, marrying rugged durability with intuitive ergonomics in a compact, handheld package. Housed in a robust, impact-resistant casing finished in a bold combination of red and grey, the device conveys both professional-grade resilience and clear visual identity. Its pistol-grip profile flows seamlessly into a slightly flared base this subtle tapering ensures a secure hold, even when technicians wear insulated gloves or work in confined switchgear compartments.
Dominating the upper half of the front face is a backlit, high-contrast LCD screen framed by a series of gently domed membrane buttons. Each button offers a reassuringly tactile click, allowing operators to navigate the tester’s functions without diverting their gaze from the display. Directly above the screen, a slender antenna emerges, hinting at the meter’s wireless communication capabilities; it remains unobtrusive, folding flush against the housing for transport yet easily extended when in use.
The UT225A system comprises two distinct clamp sensors one for high-voltage (CT1) and one for low-voltage (CT2) measurements—each tailored to different conductor sizes. The primary clamp’s generous 200 mm jaw diameter and the secondary clamp’s slender 8 mm profile share a common design language: matte-textured surfaces for enhanced grip, precision-machined hinge assemblies for smooth, consistent opening and closing, and color-coded connectors that snap securely into the tester’s base unit. A sturdy nylon strap and compact tool bag round out the ensemble, ensuring that each component is protected during transit and immediately deployable on the job site.
Thoughtful weight distribution means that the combined tester and clamp assembly never feels top-heavy, even when held at arm’s length. Subtle architectural ridges on the sides provide reinforcement against drops and impacts, while a recessed battery compartment locks shut firmly, preventing accidental opening. At just over 800 g for the meter alone, the UT225A strikes a balance between substantial, confidence-inspiring heft and the portability required for repetitive field use. In every contour and material choice, the design of the UT225A communicates reliability, comfort, and readiness for the challenges of on-site transformer testing.
Features:
- Strong anti-interference design for reliable operation in electrically noisy environments.
- Wireless transmission of primary-clamp data up to 100 m away from the host unit.
- Data Hold function to freeze readings on the display for easy viewing.
- Flexible current clamp sensor (UT225A) with an 8 mm jaw for use in tight or congested cable spaces.
- On-board data storage capable of recording up to 3 000 test results.
- High precision measurement circuitry ensuring accurate transformer turns-ratio readings.
Specifications:
| Specification | Value |
|---|---|
| Primary CT (CT1) Range: | 0.0 A – 3000 A (Resolution: 0.1 A; Accuracy: ±1% FS) |
| Secondary CT (CT2) Range: | 0.00 mA – 5 A (Resolution: 0.01 mA; Accuracy: ±0.5% FS) |
| Transformer Turns-Ratio: | 1 – 500 (Resolution: 0.1) |
| Tester Dimensions: | 78 × 165 × 42 mm |
| CT1 Module Dimensions: | Clamp Ø200 mm; Module 200 × 370 × 40 mm |
| CT2 Module Dimensions: | Clamp Ø8 mm; Module 137 × 40 × 19.5 mm |
| Weight (Tester only): | 800 g |
| Power Supply: | 4 × AAA (1.5 V); ~30 h operation; low-battery indicator at <4.8 V |
| Data Storage: | Up to 3000 test records; sampling rate 3 readings/sec |
| Wireless Range: | CT1 → Tester up to 100 m |
| Overload & Auto Power-off: | “OL A” display on overload; auto-power-off after ~15 min inactivity |
| CT Lead Length & Insulation: | 2 m leads; 3700 V rms insulation between clamp core and housing |
| Operating Conditions: | –10 °C to 50 °C, ≤70 % RH |
| Storage Conditions: | –10 °C to 60 °C, ≤70 % RH |
Applications:
- On-site testing of current transformers.
- Turns ratio measurement.
- Electrical maintenance and inspection.
- Troubleshooting and diagnostics.
- Quality control and verification.
- Power distribution system monitoring.
Package Include:
- 1x Tester (main unit)
- 1x Primary current transformer (CT1)
- 1x Secondary current transformer (CT2)
- 1x Tool bag
- 1x Strap
- 4x AAA alkaline dry batteries (1.5 V)
- 1x 6F22 9 V battery
- 1x User manual
Reviews
There are no reviews yet.