UT225A/UT225B Wireless High & Low Voltage Transformer Turns Ratio Testers
UT225A/UT225B High and Low Voltage Transformer Turns Ratio Tester can be used for quick on-site testing of current transformers in metering installations. They are designed and manufactured to test transformers’ primary current, secondary current, and turns ratio and identifies phase type and polarity.
They are widely used in residential power systems (UT225A), substations, power plants, power inspection departments, industrial and mining enterprises, inspection stations, and electrical repair departments.
Models: UT225A, UT225B
0.0A～3000A (0.1A; ±1%FS)
Primary current
0.00mA～5A (0.01mA; ±0.5%FS)
Secondary current
380V/220V power system
Online measurement voltage
1～500
Turn Ratio measurement
1.5V AAA×4; Works time: 30 hours
Power supply
78mm×165mm×42mm;
Dimension (main meter)
Key Features
Features of UT225A/UT225B Wireless High & Low Voltage Transformer Turns Ratio Testers
Certificates: ROW
● Online measurement voltage:
- UT225A: 380V/220V
- UT225B: up to 35KV
● Primary high voltage current:
- UT225A: AC 0.0A～3000A
- UT225B: AC 0.0A~800A
● Secondary low voltage current: AC 0.00mA～5A
● Strong anti-interference, high test accuracy
● Wireless transmission
● Data storage function: 3000 set
● Safe and convenient insulation rod (UT225B)
Technical Specification
| Model | UT225A | UT225B |
| Primary current | 0.0A～3000A (0.1A; ±1%FS) | 0.0A～800A (0.1A; ±0.5%FS) |
| Secondary current | 0.00mA～5A (0.01mA; ±0.5%FS) | 0.00mA～5A (0.01mA; ±0.5%FS) |
| Online measurement voltage | 380V/220V power system | up to 35KV |
| Turn ratio measurement | 1～500 | 1～500 |
| Sampling rate | 3 times/second | 3 times/second |
| Wireless transmission distance | 100m (Primary current clamp) | 100m (Primary current clamp) |
| Secondary current clamp connection wire length | 2M | 2M |
| Data storage | 3000 groups | 3000 groups |
| Data retention | YES | YES |
| Data review | YES | YES |
| Data upload | N/A | USB communication |
| Overflow display | YES (OL symbol display) | YES (OL symbol display) |
| No signal indication | YES | YES |
| Auto power off | YES (Around 15 minutes) | YES (Around 15 minutes) |
| Power supply | 1.5V AAA×4; Works time: 30 hours | 1.5V AAA×4; Works time: 30 hours |
| Insulation rod withstand voltage | 3700Vrms | 110KV |
| General Characteristics | ||
| Dimension (main meter) | 78mm×165mm×42mm; | 78mm×165mm×42mm; |
| Primary high voltage current clamp |
Jaw size: φ200mm; Dimension: 200×370×40mm; |
Jaw size: φ48mm; Dimension: 76×255×31mm; |
| Secondary low voltage current clamp |
Jaw size: φ8mm; Dimension: 137×40×19.5mm |
Jaw size: φ8mm; Dimension: 137×40×19.5mm |
| Insulation rod size | N/A | φ32mm; 1m/pcs (5 pcs) |
| Instrument weight | 800g (meter only) | The whole package: 5kg |
| Accessories | Tester, Primary current transformer(CT1), Secondary current transformer(CT2), Tool bag, Strap, Battery(AAA 1.5V * 4pcs; 6F22 9V *1), User manual |
Tester, Primary current transformer(CT1), Secondary current transformer(CT2), Tool bag, Insulation stick, USB cable, Battery(AAA 1.5V * 8pcs), User manual |
Application
Air-conditioner maintenance
Liquid measurement
