The power and electrical industry relies on accurate detection of weak AC signals to avoid equipment failures, and the Digital AC millivolt meter 5Hz-5MHz is tailored for this task. Its 5Hz-5MHz frequency range covers core test scenarios, solving hidden signal anomalies in grids, transformers, and electrical equipment.
Power Transformer: Monitoring Core Loss & Insulation Signals
Firstly, power transformers generate weak AC millivolt signals that reflect core loss and insulation conditions. The Digital AC millivolt meter 5Hz-5MHz measures no-load induced voltage and leakage current signals, capturing subtle fluctuations caused by insulation degradation.
Moreover, its high input impedance (≥10MΩ) prevents loading the test circuit, ensuring measurement accuracy. This solution enables early detection of transformer faults, avoiding catastrophic breakdowns during peak power supply periods.
Power Grid: Detecting Partial Discharge & Cable Fault Signals
Partial discharge in grid cables, switchgear, and bushings emits faint AC signals in the 5Hz-5MHz range, a key precursor to insulation failure. The Digital AC millivolt meter 5Hz-5MHz captures these weak signals even amid strong industrial electromagnetic interference.
Additionally, it is equipped with a low-noise amplification module that enhances signal clarity. Technicians use this data to locate discharge points accurately, solving the problem of hidden grid insulation hazards before they trigger blackouts.
Electrical Motor: Testing Stator Winding Fault Signals
Secondly, electrical motors (AC induction motors, servo motors) often have stator winding faults that manifest as abnormal AC millivolt signals. The Digital AC millivolt meter 5Hz-5MHz tests the winding’s impedance and induced voltage signals, identifying short circuits or turn-to-turn insulation damage.
Furthermore, its portable design allows on-site testing of motors in factories or industrial plants. This solution helps maintenance teams conduct predictive maintenance, reducing motor downtime by up to 30% and lowering repair costs.
Power Electronic Equipment: Measuring Ripple & Harmonic Signals
Inverters, rectifiers, and frequency converters in power electronic systems produce AC ripple and harmonic signals that affect operational efficiency. The Digital AC millivolt meter 5Hz-5MHz measures these mV-level signals, verifying if equipment operates within optimal parameters.
For example, it detects excessive ripple in inverter outputs that could damage sensitive electronic components. This solution helps engineers optimize circuit designs, improving the stability and lifespan of power electronic equipment.
Electrical Test Labs: Calibrating Low-Voltage Signal Sources
Finally, electrical test labs require precise calibration of low-voltage AC signal sources (e.g., signal generators, sensor simulators). The Digital AC millivolt meter 5Hz-5MHz serves as a standard tool for this task, ensuring the accuracy of test equipment.
Its high resolution (0.1μV) and stable performance meet IEC and ANSI calibration standards. This solution guarantees the reliability of test data, supporting compliance with industry quality and safety regulations.
Core Value: Versatile Precision for Proactive Maintenance
The Digital AC millivolt meter 5Hz-5MHz combines wide frequency coverage, high sensitivity, and portability. It is more cost-effective than specialized signal analyzers, making it accessible to power utilities, factories, and maintenance teams.
In the power and electrical industry, it is not just a testing tool—it is a solution that turns weak signal data into actionable insights, ensuring the safe, efficient, and stable operation of electrical systems.
Jetronl Instruments Co., Ltd. has specialized in the electronic measurement field for 35 years, covering various measurement needs across the entire electronic industry chain and providing precise measurement support.
