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Revolutionizing MOA Monitoring: The ZXBLQ-IV Online Leakage Current Tester
Introduction
Monitoring the health of Metal Oxide Arresters (MOAs) is critical for power system reliability. Traditional methods often involve costly outages, complex wiring, or hazardous climbing. The ZXBLQ-IV Zinc Oxide Arrester Energized Test Equipment represents a significant leap forward, enabling safe, accurate, and uninterrupted online assessment of leakage currents down to microamps – a key indicator of moisture ingress or aging.
Core Innovation: Uninterrupted Precision
The ZXBLQ-IV's defining achievement is its ability to perform true online, uninterruptible power testing. Unlike conventional methods requiring disconnection or complex temporary grounding, this device operates seamlessly on live systems. Its key differentiator is the advanced clip-on Current Transformer (CT) employing the latest shielding technology. This eliminates the need for series-connected lightning counters, a major limitation of older approaches, particularly for critical 6-10kV arresters which often lack counters.
Technical Superiority & Key Features
1.Microamp Accuracy: Detects leakage currents as low as 10µA with a remarkable resolution of 1µA (Range: 0.000mA - 30.00mA AC), crucial for identifying early-stage degradation. Accuracy is ±2% ±5 digits under standard conditions.
2.Wireless Freedom & Safety: 433MHz wireless transmission (30m range) combined with modular insulated rods (5x1m, AC 110kV/rms rating per rod) allows testing from ground level. No climbing, no live-line wiring – significantly enhancing technician safety and operational speed.
3.Advanced Signal Processing: A high sampling rate (2/s) coupled with sophisticated digital signal processing ensures robust performance in noisy substation environments, delivering stable and accurate readings.
4.Practical Design: Compact and lightweight (Detector: 335g; Receiver: 75x170x30mm), powered by readily available AAA batteries (DC 6V) with auto-off and low-battery warnings. The large backlit LCD (47x28.5mm) ensures readability in low-light conditions.
5.Data Management: Stores 99 test records with easy review (MR button) and features a data hold function (HOLD button).
Contrasting Traditional Methods
Feature | Traditional Methods (Offline/Some Online) | ZXBLQ-IV Tester | Advantage of ZXBLQ-IV |
Power Status | Often requires de-energization (Offline) | True Online Testing | No outages, continuous monitoring |
Connection | Requires disconnection/grounding; complex wiring | Clip-on CT; No Wiring | Faster setup; No live-line contact |
Access | Often requires climbing/pole-top access | Ground-level Operation (Wireless + Rods) | Enhanced safety; No climbing |
6-10kV MOAs | Extremely difficult or impossible without counter | Solves the 6-10kV Test Problem | Comprehensive coverage of all voltage classes |
Counter Need | Reliant on presence of a lightning counter | No Counter Required | Tests ALL arresters, regardless of counter install |
Sensitivity | Often limited (>100µA typical) | High Sensitivity (1µA res., 10µA detection) | Earlier detection of aging/moisture |
Portability | Bulky equipment, complex setups | Compact, Lightweight, Battery Operated | True field portability; Easy deployment |
Data Access | Manual recording at test point | Wireless Transmission to Ground Operator | Safer data collection; Real-time ground monitoring |
Key Applications & Benefits
1.Preventive Maintenance: Identify aging or moisture-compromised MOAs before failure by detecting subtle increases in resistive leakage current.
2.Rapid Diagnostics: Perform quick checks on suspect arresters without scheduling outages or climbing.
3.Enhanced Safety: Minimize technician exposure to high-voltage environments and eliminate climbing risks.
4.Operational Efficiency: Test arresters in minutes without disrupting power flow or requiring complex work permits.
5.Comprehensive Coverage: Effectively test all MOAs, including the problematic 6-10kV class lacking counters.
Conclusion
The ZXBLQ-IV Zinc Oxide Arrester Energized Test Equipment sets a new standard for MOA condition assessment. By combining microamp-level accuracy, advanced wireless CT technology, and ground-level operation, it overcomes the significant limitations of traditional testing methods. Its ability to perform safe, fast, and precise online leakage current measurements – particularly on 6-10kV arresters without counters – makes it an indispensable tool for power utilities and maintenance technicians dedicated to maximizing system reliability and safety. This technology represents a practical and powerful solution for proactive surge arrester management.
GDZX is a manufacturer of power detection equipment, offering a diverse range of products with comprehensive models and providing professional technical support. Contact us at +86-27-6552607 or +86-17396104357.Website: http://en.gdzxdl.com/
