Product video
HM2823 High Voltage Switchgear Partial Discharge Tester Display Video
Products Description
The HM2823 Partial Discharge Tester for High-Voltage Switchgear utilizes received ultrasonic signals generated by partial discharges to detect their presence and location. Combined with real-time image and data displays, it enables rapid diagnosis of partial discharge conditions. This locator integrates both transient earth voltage and ultrasonic detection methods. When partial discharge occurs, it generates physical phenomena such as ultrasonic waves, heat, light, and magnetic fields. Among these, ultrasonic waves propagate spherically outward from the source.
Technical Paramters
1. Instrument Hardware Specifications
Display: Color backlit LCD;
Display Resolution: 320X240;
Horizontal Sensitivity: 50μs/Div ~ 2ms/Div;
Vertical sensitivity: 4 μV/Div ~ 400 μV/Div (ultrasonic);
400 μV/Div ~ 40 mV/Div (TEV);
Trigger modes: Auto, Norm, Sign;
PC interface: USB connection;
Charging method: Dedicated charger;
Data storage: Supports SD card storage;
Operating time: 4 to 5 hours per full charge;
Controller: Membrane keyboard;
Connectors: 2.1mm low-voltage DC charger input;
3.5mm stereo headphone jack;
External ultrasonic sensor input;
Headphones: Minimum 8 ohms.
2. Dimensions
Dimensions: Main Unit 245×132×45 mm; Parabolic Diameter: 275 mm;
Weight: 1 kg (Main Unit) 0.5 kg (sensor);
.3 Battery Charger
Rated voltage: 90–264V AC;
Frequency: 47–63Hz;
Charging voltage: 12V DC;
Charging current: 500 mA;
Full charge time: 5 hours.
Products Details
1.Host Introduction
Fig1. Front View of Main Unit
Fig2. Side View of Main Unit
Fig3.Schematic Diagram of Handheld Ultrasonic Focusing Device
Operation Ways
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Button |
Function |
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Power On |
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Power Off |
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Run/Pause |
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Change Setting Parameter/Increase |
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Change Setting Parameter/Decrease |
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Select Left |
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Select Right |
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Select Save/Load File |
Detailed descriptions of specific parameter items are as follows:
Use the and keys to navigate 
left or 
right, moving the cursor to the desired position. Use the and keys to scroll 
up or
down, setting the required parameters. Press the key
to save or load files.
Mwasuring Description
Power on the main unit and ensure the TEV sensor is positioned away from any metal objects, as proximity may interfere with the self-test. Select TEV mode, connect the main unit to the TEV sensor using the provided cable, and place the TEV probe directly against the surface of the metal object to be measured.
Measurements on switchgear are taken at the center position of each component on every panel, such as cable boxes, current transformer compartments, busbar compartments, circuit breakers, and voltage transformers.
Record the first set of readings at each location. However, if the measured amplitude exceeds the background noise level by 10dB and the amplitude itself exceeds 20dB, three consecutive sets of readings should be recorded.
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