The MSJFD-1205B partial discharge detector is a newly developed digital LCD partial discharge detector designed to address the issues of low brightness and short lifespan of traditional oscilloscope tubes in partial discharge detectors.

The instrument retains the advantages of mature models, including high detection sensitivity, wide sample capacitance coverage, broad applicability to various test samples, a complete set of input units (detection impedance), and multiple frequency band combinations (nine types). Operation and structural installation are fully compatible with previous models, facilitating upgrades to existing systems.

Product Features:

1. The partial discharge signal is digitally processed and displayed on an LCD screen instead of the traditional oscilloscope tube.

2. Operation is identical to traditional analog partial discharge testing instruments, making it simple and easy to learn.

3. Freely selectable elliptical, linear, and sine display modes.

4. Employs digital windowing technology to avoid interference affecting measurements.

5. Arbitrary phase windowing, single or dual window options, and 150-degree elliptical rotation.

6. Can freeze-frame and save the current discharge spectrum for static observation and analysis of partial discharge pulses.

7. The current discharge spectrum can be saved, enabling traceability of test results.

8. Partial discharge and test voltage values can be uploaded via a standard RS485 interface using the MODBUS protocol (optional).

Key Technical Specifications

1. Capacitance range of testable samples: 6 pF - 250 μF

2. Detection sensitivity (see Table 1)

3. Amplifier Bandwidth:

① Low-end: 10kHz, 20kHz, 40kHz selectable

② High-end: 80kHz, 200kHz, 300kHz selectable

4. Amplifier Gain Adjustment: Coarse adjustment in six levels, with a gain difference of 20±1 dB between levels; Fine adjustment range ≥20 dB.

5. Time Window:

① Window width: Adjustable range 15°～150°;

② Window position: Each window can rotate 0°～170°;

③ Two time windows can be opened separately or simultaneously.

6. Discharge Meter: Digital meter: Displayed with 3½ LEDs; 0-100.0 error <±5% (full scale)

7. Elliptic Time Base:

① Frequency: 50Hz, 100Hz, 150Hz, 200Hz, 400Hz.

② Elliptic Rotation: Rotates in 30° increments, up to 150°.

③ Display mode: Ellipse—Line—Sine.

8. Test voltmeter:

① Range: 100KV (expandable)

② Display: 3½ digital voltmeter indication

Accuracy: Better than ±5% (full scale)