Transformer DC Resistance Tester| XHZ1340A Product Overview
DC resistance testing is mandatory for transformers during manufacturing (semi-finished and finished products), installation, handover, and preventive maintenance, detecting production defects such as coil material and welding issues, loose connections, missing strands, and breaks, as well as operational hazards. To enable rapid DC resistance measurement, this company has developed the Transformer DC Resistance Tester with in-house technology. This new-generation tester integrates magnetizing method testing, three-phase testing (Yn, Y, and Δ), and demagnetization, making it ideal for large power transformers. It features a true-color high-resolution large LCD screen, touch plus shuttle knob operation for on-site convenience, Chinese menu prompts for intuitive use, one-time wiring for all tests, fast speed, high accuracy, and a wide measurement range.
Technical Parameters
| Parameter |
Specification |
| Model |
XHZ1340A |
| Testing Method |
DC Resistance (Magnetizing Method) |
| Three-Phase Testing |
Yn, Y, windings |
| Maximum Output Current |
40A |
| Test Range |
0 - 25kΩ |
| Resistance Change Rate |
Auto-calculate at 5S, 15S, 30S |
| Protection Functions |
380V misconnection, back EMF, open circuit, power failure, grounding disconnection alarm |
| Display |
7-inch industrial true-color touchscreen |
| Operation |
Full touch + one-button shuttle knob |
| Built-in Storage |
200 data entries |
| External Storage |
USB flash drive |
| Printer |
Thermal printer |
Product Image
Key Features
Three-phase measurement for Yn, Y, and Δ windings with automatic imbalance rate calculation
40A maximum output current and 0-25kΩ test range, integrating magnetization and demagnetization
Automatic resistance change rate calculation at 5S, 15S, and 30S to prevent data misreading
Multiple protections: 380V misconnection, back EMF, open circuit, power failure, grounding disconnection alarm
Thermal printer with 200-entry built-in storage and USB flash drive expansion
Industrial 7-inch true-color touchscreen with one-button shuttle operation
Intended Users
Designed for transformer manufacturing QC teams, installation and commissioning engineers, and preventive maintenance personnel who perform mandatory DC winding resistance measurement during production, handover, and routine maintenance. Unlike winding deformation analyzers used for post-fault structural diagnosis, this instrument serves routine resistance verification and three-phase balance assessment across the entire transformer lifecycle.
Application Sites
Power systems: power generation, transmission, transformation, and distribution
Factories and Mines: large-scale manufacturing plants and various mining companies
Metallurgy and Petrochemicals: smelting, chemical processing, water treatment
Transportation: ports, railways, highways, airports and municipal streetlights
Enterprises and Institutions: logistics departments of large enterprises and institutions
Construction Industry: large construction and property management companies
Power Installation and Testing: power installation and commissioning companies of all levels
FAQ
Q1: What transformer windings can the XHZ1340A test?A: It supports three-phase testing of Yn, Y, and Δ (delta) windings, and automatically calculates the three-phase imbalance rate.
Q2: What are the maximum output current and test range?A: The maximum output current is 40A with a test range of 0-25kΩ, meeting the testing requirements of most transformers.
Q3: Does it support magnetization and demagnetization?A: Yes. It integrates magnetization and demagnetization functions to meet various on-site testing needs.
Q4: How does it help ensure reliable measurements?A: It automatically calculates the resistance change rate at 5S, 15S, and 30S, helping testers judge data stability and avoid misreading.
Q5: What protection functions does it include?A: It includes 380V incorrect connection protection, back EMF protection, open circuit protection, power failure protection, and a grounding wire disconnection alarm.
