Product name: HCR3310A/20A Transformer DC Resistance Tester
Category: Transformer Comprehensive Test Series
Detailed Introduction
Product Introduction
The DC resistance of the transformer is a must-test item for semi-finished and finished product factory tests, installation, handover tests, and preventive tests by the power department during transformer manufacturing. It can effectively detect manufacturing defects such as material selection, welding, loose connection parts, missing strands, and broken wires of the transformer coil, as well as hidden dangers after operation.
Features
※ Only one wiring is required to complete the measurement of all DC resistance data of high and low voltage windings;
※ Three-phase simultaneous measurement plus auxiliary magnetic method measurement is faster and greatly reduces the harm of residual magnetism;
※ Display and print all test data of high, medium and low voltage windings of the transformer, and automatically calculate
※ Three-phase unbalance rate, and can also print the resistance value automatically converted to the rated temperature;
※ It has a complete back-EMF protection function;
※ It has automatic discharge and discharge indication functions to reduce misoperation and ensure the safety of equipment and personnel;
※ The instrument can permanently store 500 sets of test data, and can also use a USB flash drive to store data;
※ The instrument has the characteristics of wide applicable temperature, high accuracy, shockproof, anti-interference, and easy to carry.
Technical parameters
| model | HCR3310A | HCR3320A |
| Properties | ||
| Output Current | Three-phase test: 2*5A, 2*2.5A, 2*1A | Three-phase test: 2*10A, 2*5A, 2*2A |
| Single-phase test: 10A, 5A, 1A | Single-phase test: 20A, 10A, 2A | |
| Measuring range | 2*5A: 1mΩ~1Ω | 2*10A:500μΩ~500mΩ |
| 2*2.5A:2mΩ~2Ω | 2*5A: 1mΩ~1Ω | |
| 2*1A: 5mΩ~5Ω | 2*2A: 2.5mΩ~2.5Ω | |
| 10A: 500μΩ~2Ω | 20A: 250μΩ~1Ω | |
| 5A: 1mΩ~4Ω | 10A: 500μΩ~2Ω | |
| 1A: 5mΩ~20 | 2A: 2.5mΩ~10Ω | |
| Resolution | 0.1μΩ | |
| Measurement accuracy | ±(0.2%读数+2字) | |
| Ambient temperature | -10℃~50℃ | |
| Ambient humidity | ≤85%RH | |
| Working power supply | AC220V±10% | |
| Power supply frequency | 50±1Hz | |
| Overall dimensions | 420mm×250mm×340mm | |
| Instrument weight | 15kg | |


