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MRT Ultra High Voltage Insulation Resistance Tester

MRT Ultra High Voltage Insulation Resistance Tester

MRT Ultra Digital Intelligent High Voltage Insulation Resistance Tester with 500V-10kV Multi-Range Output, Built-in Lithium Battery, Automatic PI/DAR Calculation, for Power Equipment Insulation Condition Evaluation.

Description
Specifications
Applications
Advantages
FAQ
Recommended Products

Description

MRT Ultra is a professional flagship high-voltage insulation resistance tester designed for comprehensive insulation performance evaluation of power transformers, high-voltage cables, motors, generators, switchgears and insulators in power systems, electrical manufacturing and industrial enterprises. It strictly complies with GB/T 18216.2-2021, IEC 61557-2:2019 and DL/T 596-2021 standards, supporting 500V/1000V/2500V/5000V/10000V five-gear switchable DC output to meet the test requirements of different voltage levels and equipment capacities.

Adopting high-frequency switching power supply + 24-bit Σ-Δ ADC technology, the instrument features 0.01MΩ-10TΩ ultra-wide measurement range and ±5% full-range accuracy. The built-in 14.8V/10Ah high-capacity lithium battery provides ≥12 hours continuous working time and ≥500 tests per charge, eliminating the need for external AC power supply. It automatically measures R15s, R60s and R600s insulation resistance values, and calculates absorption ratio (DAR) and polarization index (PI) in real time, which are key indicators for evaluating insulation aging and moisture content.

Specifications

Parameter	Specification
Compliance Standards	GB/T 18216.2-2021, IEC 61557-2:2019, DL/T 596-2021, IEEE 43-2013
Test Voltage	DC 500V/1000V/2500V/5000V/10000V five-gear switchable
Voltage Accuracy	±3% of reading
Output Short-Circuit Current	≥5mA
Insulation Resistance Range	0.01MΩ ~ 10TΩ (automatic range switching)
Resistance Accuracy	±5% (0.1MΩ~10GΩ); ±10% (10GΩ~100GΩ); ±20% (100GΩ~10TΩ)
Leakage Current Range	0.01nA ~ 5mA
Current Accuracy	±5% of reading
Test Time	1s ~ 9999s adjustable
PI/DAR Calculation	Yes (automatic R15/R60/R600 measurement)
Temperature Compensation	Yes (automatic compensation to 20℃)
Power Supply	Built-in 14.8V/10Ah lithium battery; AC 220V charging
Battery Life	≥12 hours continuous working, ≥500 tests per charge
Charging Time	≤6 hours
Display	4.3-inch color LCD, high brightness, sunlight readable
Data Storage	2000 groups (with time stamp, ID, voltage, temperature)
Communication Interfaces	Bluetooth 5.0, USB 2.0
Protection Functions	Over-voltage, over-current, short-circuit, reverse connection, low battery
Automatic Discharge	Yes (audible and visual alarm)
Operating Temperature	-10℃ ~ +50℃
Humidity	≤85% RH (non-condensing)
Dimensions (L×W×H)	280×220×120mm
Weight	~4.5kg (including battery)
Enclosure	Aluminum alloy, IP54

Applications

Core Test Objects

Power transformers: Oil-immersed transformers, dry-type transformers, distribution transformers
Cable systems: High-voltage power cables, control cables, communication cables
Rotating machinery: Motors, generators, turbine generators
Switchgears: Vacuum circuit breakers, SF6 circuit breakers, disconnect switches, busbars
Insulators: Porcelain insulators, composite insulators, epoxy resin insulators

Typical Usage Scenarios

Power companies: Substation preventive maintenance, insulation condition assessment, fault diagnosis
Transformer manufacturers: Factory quality control, type test, batch production inspection
Power plants: Generator and transformer insulation test, auxiliary equipment maintenance
Industrial enterprises: High-voltage equipment regular inspection, safety assessment
Third-party testing institutions: Electrical equipment certification testing, on-site calibration services

Advantages

Compliance with Latest International Standards

Fully meets GB/T 18216.2-2021, IEC 61557-2:2019, IEEE 43-2013 → test results are globally recognized

Industry-Leading 500V-10kV Multi-Range Output

Five-gear switchable voltage adapts to all voltage levels from low-voltage distribution to 10kV high-voltage equipment → one instrument replaces multiple testers

Ultra-Wide Range & High Precision

0.01MΩ-10TΩ measurement range, ±5% accuracy → accurately measures both low-resistance insulation defects and high-resistance healthy insulation

Automatic PI/DAR Calculation

Real-time calculation of absorption ratio and polarization index, key indicators for evaluating insulation aging and moisture content → eliminates manual calculation errors and improves test efficiency

FAQ

Q: What is the significance of absorption ratio (DAR) and polarization index (PI)?

A: Absorption ratio (DAR = R60/R15) and polarization index (PI = R600/R60) are key indicators for evaluating insulation condition:

DAR < 1.3 or PI < 1.5: Indicates insulation is moist or severely degraded
1.3 ≤ DAR < 1.6 or 1.5 ≤ PI < 2.0: Indicates insulation is slightly moist or aged
DAR ≥ 1.6 or PI ≥ 2.0: Indicates insulation is in good condition

MRT Ultra automatically calculates these values, eliminating manual calculation errors and providing objective insulation assessment.

Q: What is the difference between MRT Ultra and MRT-10?

A: The main differences are:

Voltage range: MRT Ultra supports 500V-10kV five-gear output, while MRT-10 only has 10kV fixed output
Battery life: MRT Ultra has ≥12 hours battery life, 50% longer than MRT-10
Communication: MRT Ultra adds Bluetooth 5.0 wireless transmission, while MRT-10 only has USB
Data storage: MRT Ultra stores 2000 groups, twice as much as MRT-10
Accuracy: MRT Ultra has improved accuracy in high-resistance range (100GΩ-10TΩ)

Q: How long can the battery last on a single charge?

A: The built-in 14.8V/10Ah lithium battery provides ≥12 hours continuous working time and ≥500 tests per charge under normal use. It supports charging while testing, so you can use it even when the battery is low.

Q: How to calibrate the instrument?

A: MRT Ultra can be calibrated using standard high-value resistors with accuracy not lower than 0.1 class. The calibration procedure is simple and fast: