MS‑D120A 20A Transformer DC Resistance Tester
MS‑D120A 20A Transformer DC Resistance Tester
Product Description
Product Overview
Used for transformer factory, overhaul, hand‑over & preventive tests; checks winding welds, turn‑to‑turn short‑circuit and tap‑changer contact faults.
Key Features
- Max 20A test current, multi‑current ranges; high‑speed MCU control, auto‑discharge alarm
- Touch screen, Chinese‑English switch; built‑in printer; RS232, USB, Android APP control
- Stores 1000 data sets, supports print/U‑disk export
- Supports single‑phase & magnetic‑assist test for Y(N)‑d‑11 transformers
- Portable: host 15kg, wire box 5.5kg
Specifications
| Item | Technical indicators and parameters | remarks |
| Test current | <20mA、1A、2.5A、5A、10A、20A | |
| measuring range | 200μΩ～1Ω （20A） 1mΩ～2Ω （10A） 2mΩ～4Ω （5A） 5mΩ～8Ω (2.5A） 10mΩ～20Ω (1A） | Accuracy: (0.2%+2 words) |
| 10Ω-20KΩ （<20mA） | Accuracy: (0.5%+2 words) | |
| Minimum resolution | 0.1μΩ | |
| Display | LCD | The effective number of resistance display is 4 digits. |
| Data storage | 1000 group | |
| working environment | Ambient temperature: 0℃ ~ 40℃, relative humidity: < 90%RH, no condensation. | |
| Power Supply | AC 220V±10V,50Hz±1Hz | Safety tube 5A |
| Maximum power consumption | 500W | |
| outline dimension | host machine：405×230×355（mm）Wire box：360×260×180（mm） | |
| weight | host machine 15KG Wire box:5.5KG | |
| Test line length | Standard 13 meters | The length can be customized |
Application Scenarios
Transformer factory acceptance, substation overhaul & preventive maintenance.
