Comprehensive Handheld Partial Discharge Tester(RDPDZ-104T)
Wrindu's Handheld PD Tester is portable and user-friendly, which is designed to detect partial discharge (PD) in high-voltage electrical equipment, such as GIS, switchgears, transformers, and more.
We’re excited to announce the launch of our Comprehensive Handheld Partial Discharge Tester (RDPDZ-104T). This portable, user-friendly device is designed to detect partial discharge (PD) in high-voltage electrical equipment, such as GIS, switchgears, transformers, and more.
Why Partial Discharge Detection Matters？
Partial discharge (PD) is a common phenomenon in high-voltage electrical equipment, occurring due to insulation defects. These discharges generate detectable signals like light, sound, and vibrations, which can be used to identify potential hazards before they lead to catastrophic equipment failures. Timely PD detection can help prevent downtime, improve the safety of power systems, and extend the lifespan of costly electrical equipment.
Key Features of Wrindu Handheld PD Tester
| Feature | Description |
|---|---|
| Multiple Detection Methods | Equipped with TEV, AE, UHF, and HFCT sensors for detecting PD in various electrical equipment. Supports time-domain waveforms, PRPD, and PRPS for accurate discharge analysis. |
| Configurable with Different Sensors | Highly configurable to work with different sensors for various applications like transformers, GIS, overhead lines, and cables. |
| User-Friendly Interface | Intuitive human-machine interface (HMI) for easy operation and data management, with built-in AE and TEV sensors. |
| Non-Intrusive Testing | No need for a power outage or additional high-voltage source during testing, allowing continuous operation without disruption. |
| Wide Frequency Band | Test bandwidth range of 30kHz ~ 2.0GHz, making it suitable for a variety of detection principles and applications. |
Product Specifications
| Specification | Value |
|---|---|
| TEV Measurement Range | 0dB ~ 60dB, Resolution: 0.1dB, Accuracy: ±1dB |
| AE Measurement Frequency Range | 20 ~ 200 kHz, Accuracy: ±1dB |
| UHF Measurement Bandwidth | 300 ~ 2000 MHz, Sensitivity: <1dB |
| HFCT Measurement | Sensitivity: ≤50pC, Frequency Range: 1 ~ 30 MHz |
| Battery | 3.7V/10000mAh Lithium, 12 hours of continuous operation |
Why Choose Wrindu’s Handhled PD Tester?
Wrindu’s Handhled PD Tester is an ideal choice for reliable partial discharge (PD) testing due to its advanced features and versatile capabilities. It provides a comprehensive solution for detecting PD in various types of electrical equipment, including new, rewound, or refurbished motors.
With its multiple detection methods, such as TEV, AE, UHF, and HFCT sensors, the RDPDZ-104T is capable of identifying PD in both the windings and the stator core insulation. This ensures that potential issues, whether subtle or advanced, can be accurately diagnosed.
Wrindu’s Handhled PD tester is highly configurable, allowing it to adapt to different applications like transformers, GIS, overhead lines, and cables. Its non-intrusive testing feature makes it particularly beneficial for use on motors without needing to disrupt normal operation. Additionally, the PD tester’s wide frequency range (30kHz ~ 2.0GHz) ensures reliable PD detection across various discharge patterns and frequencies, even in challenging conditions.
FAQs
Can PD be found on new or freshly renewed/rewound motors?
A: Yes, PD can occur in both the windings and the stator core insulation. If PD is detected in a new or rewound motor, it could indicate issues that should be addressed, but it doesn’t necessarily mean the motor needs to be discarded. It’s recommended to track both potential PD sources.
How far from the motor can the PD test be applied without cable run influence?
A: PD testing is typically reliable up to about 1000 feet from the motor. For best results, start testing from the NCC (control room) in a controlled environment (air-conditioned, low-traffic). If issues are found, test closer to the motor by disconnecting the cables. The NCC is usually the most reliable test origin.
Is offline PD testing valid for a 4160 V motor?
A: Yes, PD can occur in voids or air gaps even in 4160 V systems. Offline testing allows you to apply higher voltages than the power system limits and helps simulate conditions beyond normal operating conditions, while online testing reflects real operating conditions more accurately (like pressure, humidity, and loading). Both methods have their value and can complement each other.
Is online PD testing more accurate than offline testing?
A: Not necessarily. Both offline and online tests have their strengths. Online tests reflect actual operating conditions, while offline tests simulate specific aspects like higher voltages. If both methods are available, using them together provides a more comprehensive assessment.
What is the PD pulse frequency range?
A: PD pulses typically occur at very high frequencies, ranging from MHz to GHz. At lower frequencies (below 1 MHz), they can be measured in millivolts, while at higher frequencies (above 1 MHz), nanocoulombs are used.
Can surge tests detect early signs of PD?
A: Surge testing can sometimes detect PD, but if the PD is advanced, it may not appear clearly in the surge waveform. Small peaks on the downslope of the surge test’s first hump may indicate PD, but other factors, like winding configuration or DC bias, can also cause similar features.
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