The MS‑8320D is a new‑generation fast‑testing instrument for transformer DC resistance measurement. It is applied for transformer factory tests, installation‑handover tests and preventive maintenance. It detects manufacturing defects such as coil material issues, poor welding, loose connections and broken strands. Integrated with three‑phase testing and auto‑degaussing functions, this unit adopts a 7‑inch full‑touch true‑color LCD screen and is well‑suited for on‑site substation operations.

Main Features

1. Supports three‑phase testing for Yn, Y and Delta‑connected windings; automatically calculates three‑phase unbalance rate. Max output current up to 20A, measurement range 0‑200 Ω, built‑in auto degaussing.

2. Automatically calculates resistance change rate within 5 s / 15 s / 30 s to help judge data stability and avoid misreading.

3. Multiple protection functions against back‑EMF, wire disconnection and power failure.

4. Built‑in thermal printer; local storage for up to 200 test records; supports mass data export to FAT / FAT32 USB flash drive.

5. 7‑inch industrial true‑color touch screen for intuitive full‑touch operation.

Key Technical Specifications

‑ Output Current:

Single‑phase: 20A, 10A, 5A, 1A, 0.1A

Three‑phase: 10A+10A, 5A+5A, 1A+1A, 0.1A+0.1A

‑ Measurement Range:

Single Phase: Gear 20A 0.5mΩ～ 1 Ω

Gear 10A 1.0mΩ～ 2 Ω

Gear 5 A 10 mΩ～ 4 Ω

Gear 1 A 0.1Ω～ 20Ω

Gear 0.1A 2.0Ω～ 200Ω

Three phase:

Gear 10A + 10A 0.5mΩ ～ 0.8 Ω

Gear 5 A + 5 A 10 mΩ ～ 1.6 Ω

Gear 1 A + 1 A 0.1 Ω ～ 8.0 Ω

Gear 0.1A+0.1A 2.0 Ω ～ 80 Ω

‑ Accuracy: ±(reading × 0.2% + 2 digits)

‑ Power Supply: AC220V±10%, 50/60 Hz

‑ Operating Temperature: ‑10℃ ~ 50℃

‑ Relative Humidity: <90%, non‑condensing

‑ Dimensions: 400 mm × 315 mm × 223 mm

‑ Weight: 9 kg

/Products

/