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An Overview of the ZX-3125A Insulation Resistance Tester
Insulation testing is a critical procedure for verifying the integrity of electrical insulation in equipment and systems. It helps prevent equipment failure, ensures operational safety, and is often a mandatory requirement in many regions, including the European Union. The ZX-3125A Insulation Resistance Tester is a sophisticated handheld instrument designed to perform these tests accurately and safely across a wide range of applications. This article provides a technical overview of its key features, specifications, and operational capabilities for engineering professionals.
Key Features
The ZX-3125A is designed with several user-oriented and safety features:
Safety Compliance: It meets IEC 61010-1, -2-30 (CAT III 600V / CAT IV 300V) and IEC 61010-031 standards, ensuring safe operation in demanding electrical environments.
Auto-Discharge Function: After testing capacitive loads, the instrument automatically discharges stored energy, enhancing user safety. The discharge status can be monitored via the voltage monitor.
Backlight & Bar Graph: A backlit LCD facilitates work in low-light conditions, while a bar graph provides a quick, visual representation of measurements.
Live Circuit Warning: The tester provides both audible and visual alerts when a live circuit is detected, preventing accidental contact.
Automatic Calculations: It can automatically calculate and display Polarization Index (PI) and Dielectric Absorption Ratio (DAR), key metrics for assessing insulation condition.
Auto-Power Off: To conserve battery life, the unit turns off automatically after 10 minutes of inactivity (non-operational during active measurement).
Technical Specifications
1. Insulation Resistance Measurement
The tester offers five selectable test voltages with extensive measuring ranges.
Rated Voltage | 250V | 500V | 1000V | 2500V | 5000V |
Measuring Range | 0.1 ~ 100.0 MΩ | 0.1 ~ 1000 MΩ | 0.80 MΩ ~ 2.00 GΩ | 0.1 MΩ ~ 100.0 GΩ | 0.1 MΩ ~ 2000 GΩ |
Open Circuit Voltage | DC 250V (+10%, -10%) | DC 500V (+20%, -10%) | DC 1000V (+20%, -0%) | DC 2500V (+20%, -0%) | DC 5000V (+20%, -0%) |
Short-circuit Current | 5 mA ±0.5 mA | ||||
Accuracy | ±5% ±3 digits | ±5% ±3 digits ±20% |
2. Voltage Measurement
The instrument can also function as a voltage tester to verify the absence of voltage before and after an insulation test.
Parameter | DC Voltage | AC Voltage (50/60Hz) |
Range | ±30V ~ ±600V | 30V ~ 600V |
Resolution | 1V | 1V |
Accuracy | ±2% rdg ±3 digits | ±2% rdg ±3 digits |
*Note: The voltage monitor for checking discharge (30-600V range) has an accuracy of ±10% rdg ±20V.*
3. General Specifications
Display: LCD with max 1200 counts for insulation, 630 counts for voltage, and a 36-segment bar graph.
Overload Protection: Insulation resistance range is protected against AC 1200V for 10 seconds.
Withstand Voltage: AC 5160V for 5 seconds between the electrical circuit and enclosure.
Power Supply: 12.6V / 6800mAh rechargeable battery.
Battery Life: Capable of approximately 25 hours of continuous measurement under a 100 MΩ load at the 5000V range.
Operating Conditions: 0°C to 40°C, up to 85% RH (non-condensing).
Dimensions & Weight: 177mm (L) x 226mm (W) x 100mm (D) / 1.9 kg (including battery).
Current Consumption
The current draw varies depending on the operating mode, which is crucial for estimating battery life.
Range / Mode | 250V | 500V | 1000V | 2500V | 5000V | VAC/DC |
Rated Current Output | 650 mA | 800 mA | 1000 mA | 1350 mA | 1350 mA | 110 mA |
Open Circuit Output | 40 mA | 40 mA | 50 mA | 80 mA | 150 mA | - |
Stand-by | 25 mA |
Backlight operation adds approximately 40 mA to the above values.
Conclusion
The ZX-3125A Insulation Resistance Tester is a robust, feature-rich instrument suitable for a wide array of electrical testing and maintenance tasks. Its combination of high accuracy, broad measurement ranges, built-in safety features like auto-discharge and live circuit warnings, and automated PI/DAR calculations makes it an invaluable tool for technicians and engineers tasked with ensuring system reliability and safety compliance. Understanding its specifications and operational parameters allows for effective and safe application in the field.
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/
