Description
Megger MIT1525 15kV Insulation Resistance Tester
The Megger MIT1525 15kV Insulation Resistance Tester is a high-performance diagnostic instrument designed for testing and analyzing insulation resistance in high-voltage electrical equipment. Engineered for reliability, safety, and precision, the MIT1525 is ideal for utilities, power plants, industrial facilities, and service professionals working with critical electrical infrastructure.
With a maximum test voltage of 15 kV, the MIT1525 is perfectly suited for testing transformers, motors, generators, cables, switchgear, and other high-voltage assets. It delivers accurate insulation resistance measurements up to multi-tera ohm ranges, enabling early detection of insulation degradation and helping prevent costly failures.
The instrument features advanced diagnostic capabilities, including Polarization Index (PI), Dielectric Absorption Ratio (DAR), Step Voltage, and Dielectric Discharge (DD) tests. These functions provide deeper insight into insulation condition, allowing engineers to make informed maintenance decisions and improve asset reliability.
Designed for demanding field environments, the MIT1525 offers a rugged construction, weather-resistant case, and intuitive color display for clear readings in various lighting conditions. It also includes internal memory storage and data download capabilities, simplifying report generation and compliance documentation.
Safety is a priority, with built-in automatic discharge, warning indicators, and protection circuits to safeguard both the operator and the equipment under test. Its rechargeable battery system ensures extended operation in remote locations without compromising performance.
Whether for commissioning, preventive maintenance, or troubleshooting, the Megger MIT1525 15kV provides the power, accuracy, and advanced diagnostics required for high-voltage insulation testing.
Key Features:
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Test voltage up to 15 kV
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Insulation resistance measurement in multi-tera ohm range
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Advanced diagnostic tests: PI, DAR, Step Voltage, DD
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Large, clear digital display
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Internal memory with data download capability
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Automatic discharge and safety protection features
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Rugged, field-ready design with rechargeable battery
Technical Specifications
Test Voltage
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1000 V, 2500 V, 5000 V, 10,000 V, 15,000 V (15 kV) DC
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User-defined test voltage:
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100 V – 1 kV (10 V steps)
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1 kV – 5 kV (25 V steps)
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5 kV – 15 kV (25 V steps)
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Resistance Range
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10 kΩ up to 30 TΩ (@15 kV)
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10 kΩ up to 20 TΩ (@10 kV)
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10 kΩ up to 15 TΩ (@5 kV)
Measurement Accuracy
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±5% from 1 MΩ to 3 TΩ (@15 kV)
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±5% across voltage ranges according to specification
Short-Circuit / Charge Current
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3 mA at 5 kV, 10 kV, and 15 kV
Additional Measurement Features
Test Modes
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IR (Insulation Resistance), Timed IR
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DAR (Dielectric Absorption Ratio)
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PI (Polarization Index)
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SV (Step Voltage), DD (Dielectric Discharge)
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Ramp Test
Capacitance Measurement
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10 nF to 50 µF (at test voltages > 500 V)
Voltmeter
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30 V to 660 V AC/DC
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Accuracy: ±3% ±3 V
Current Range
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0.01 nA to 6 mA
Features & Functionality
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Large backlit LCD display
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On-board memory with real-time clock (timestamped results)
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USB interface for PC connection and data download
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Dedicated voltmeter and advanced memory recall
Environmental & Safety Ratings
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AC Power Input: 90 – 264 V, 47 – 63 Hz (200 VA)
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Operating Temperature: –20 °C to +50 °C
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Storage Temperature: –25 °C to +65 °C
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Humidity: ≤ 90% RH non-condensing
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IP Rating: IP65 (lid closed) / IP40 (lid open)
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Safety Rating: CAT IV 1000 V up to 3000 m
Dimensions & Weight
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Dimensions: approx. 360 × 305 × 194 mm
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Weight: approx. 6.5 kg (14 lbs)
Battery & Runtime
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Rechargeable Li-ion battery (IEC 2133 compliant)
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Approx. 4.5 hours continuous testing at 15 kV / 100 MΩ
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Charging time: approx. 2 – 2.5 hours
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