EN
MOA-301 Zinc Oxide Surge Arrester Comprehensive Tester
MOA-301 Digital Intelligent Single-Phase Zinc Oxide Surge Arrester Comprehensive Tester with Wired/Wireless Dual Voltage Sampling, Harmonic Analysis, for 10kV~110kV Arrester Daily Inspection.
- Description
- Specifications
- Applications
- Advantages
- FAQ
- Recommended Products
Description
MOA-301 is a professional cost-effective single-phase zinc oxide surge arrester (MOA) comprehensive tester designed for daily inspection, routine maintenance and fault diagnosis of 10kV~110kV zinc oxide arresters in small and medium substations, distribution networks and industrial enterprises. It strictly complies with DL/T 987-2018, GB 11032-2010 and IEC 60099-4:2014 standards, adopting advanced digital waveform analysis technology and FFT harmonic analysis algorithm that effectively eliminates power frequency interference and accurately measures the resistive current component, the key indicator for evaluating arrester health state.
The instrument features innovative wired/wireless dual voltage sampling mode with 400 meters wireless transmission distance, eliminating the need for long cable laying in substations. It supports comprehensive parameter measurement including full current, resistive current (fundamental and 3/5/7 harmonics), capacitive current, power consumption and phase difference. The large backlit LCD display provides intuitive operation and real-time display of test parameters and waveforms.
Specifications
| Parameter | Specification |
|---|---|
| Compliance Standards | DL/T 987-2018, GB 11032-2010, IEC 60099-4:2014, DL/T 474.5-2006 |
| Test Modes | On-line live test / Off-line test |
| Voltage Sampling Modes | Wired PT / Wireless PT / No-PT (software reference) |
| Wireless Transmission Distance | ≥400 meters (open area, unobstructed) |
| Wired Synchronization Distance | 40 meters (extendable to 100 meters) |
| PT Reference Voltage Range | 30V ~ 100V AC (RMS) (extendable to 250V) |
| Voltage Measurement Accuracy | ±2% reading ±1 digit (wired); ±5% reading ±1 digit (wireless) |
| Full Current Range | 0 ~ 10mA AC (RMS) |
| Current Measurement Accuracy | ±2% reading ±1 digit (full current >100μA) |
| Resistive Current Range | 0 ~ 10mA AC (RMS) |
| Phase Difference Accuracy | ±1° |
| Power Consumption Range | 0 ~ 999W |
| Display | Large backlit LCD display |
| Data Storage | 1000 groups (with time stamp, parameters and waveforms) |
| Communication Interface | USB 2.0 (U-disk export) |
| Power Supply | Built-in lithium battery; AC 220V charging |
| Battery Life | ≥4 hours continuous working time |
| Charging Time | ≤6 hours |
| Operating Temperature | -10℃ ~ +50℃ |
| Humidity | ≤85% RH (non-condensing) |
| Dimensions (L×W×H) | 340×220×200mm |
| Weight | ~5kg (including battery, excluding cable box) |
| Enclosure | Rugged aluminum alloy, IP40 |
Applications
Core Test Objects
- Zinc oxide surge arresters: 10kV~110kV indoor/outdoor zinc oxide arresters (MOA)
- Application systems: Small and medium substations, distribution networks, industrial power systems
Typical Usage Scenarios
- Power companies: Distribution network and small substation arrester routine patrol inspection and fault diagnosis
- Industrial enterprises: Internal power system arrester regular inspection and maintenance
- Arrester manufacturers: Factory quality control and batch inspection of medium and low voltage arresters
- Third-party testing institutions: Arrester certification testing and safety assessment
Advantages
Compliance with Latest Industry Standards
Fully meets DL/T 987-2018, GB 11032-2010, IEC 60099-4:2014 → test results are globally recognized
Cost-Effective Single-Phase Design
Optimized for single-phase test requirements, providing high performance at an affordable price → ideal for daily patrol inspection and budget-conscious users
Wired/Wireless Dual Mode
400 meters wireless transmission, eliminating long cable laying → reduces test time by 60% and improves work efficiency
Comprehensive Harmonic Analysis
Accurately measures 3/5/7 harmonic components of resistive current → identifies early internal defects such as moisture and valve aging
Simple Operation & Easy Maintenance
One-click test function, no complex settings required → reduces training time and operation errors
FAQ
Q: Can MOA-301 test arresters without PT voltage signal?
A: Yes. MOA-301 supports no-PT test mode, which uses software algorithm to generate a virtual voltage reference based on the current waveform. This mode is suitable for field tests where PT voltage is unavailable, providing a convenient solution for emergency maintenance.
Q: What is the significance of measuring resistive current harmonics?
A: When zinc oxide arresters are internally moistened or valve plates are aged, the nonlinear characteristics of the valve plates will change, leading to a significant increase in the 3rd harmonic component of resistive current. By measuring the harmonic components, we can identify early defects that cannot be detected by total current measurement, preventing sudden failures.
Q: How to calibrate the instrument?
A: MOA-301 can be calibrated using standard current sources and standard voltage sources with accuracy not lower than 0.2 class. The calibration procedure is simple and fast:
- Enter the calibration mode in the instrument menu
- Follow the prompts to connect the standard current source and standard voltage source
- Complete the calibration of current and voltage parameters
- The instrument will automatically save the calibration coefficients
The instrument should be calibrated once every 12 months according to national metrology requirements.
