Megger MIT30

The Megger MIT30 30kV High Voltage Insulation Tester is a precision-engineered DC insulation resistance tester designed for testing medium- and high-voltage electrical equipment. Capable of delivering up to 30 kV DC test voltage, the MIT30 provides accurate and stable insulation resistance measurements for cables, transformers, switchgear, rotating machines, and other high-voltage assets.

Built for utility, substation, and heavy industrial environments, the MIT30 offers a continuously adjustable high-voltage output, allowing technicians to perform controlled insulation tests tailored to the equipment under evaluation. Its high charging current capability ensures reliable testing of long cable runs and high-capacitance loads, while precision current measurement enables accurate resistance readings from meg ohms to tera ohms.

Advanced diagnostic testing methods including:

• Insulation Resistance (IR) measurement

• Polarization Index (PI) testing

• Dielectric Absorption Ratio (DAR)

• Step voltage testing

• Controlled ramp voltage testing

• Timed test sequences

• Leakage current monitoring

These diagnostic functions help detect insulation aging, moisture contamination, surface tracking, and internal breakdown before catastrophic failure occurs.

Safety is a core design feature of the MIT30. It incorporates zero-start interlock protection, automatic discharge of the test object after completion, voltage presence detection, and clear safety indicators to protect both the operator and the equipment under test. The rugged enclosure is designed to withstand harsh field conditions, making it suitable for demanding maintenance operations.

A clear display provides real-time indication of voltage, resistance, current, and test duration, enabling operators to monitor performance throughout the test cycle. Internal data storage and PC connectivity allow results to be recorded, downloaded, and incorporated into maintenance reports or compliance documentation.

The Megger MIT30 is an ideal solution for:

• High-voltage cable testing

• Transformer insulation diagnostics

• Switchgear and breaker insulation verification

• Motor and generator insulation evaluation

• Commissioning and preventive maintenance programs

• Utility and substation reliability testing

Combining high-voltage capability, advanced diagnostic features, and robust field-ready construction, the MIT30 is a trusted instrument for professionals who require accurate, safe, and dependable insulation testing up to 30 kV.

Specification

High Voltage & Output

• Maximum Test Voltage: Up to 30 kV DC

• Voltage Selection: Continuously adjustable output for tailored testing

• Controlled Ramp Function: Smooth voltage application and controlled ramp-down to protect test specimens

• High Charging Current: Capable of stable output for long cables and high-capacitance loads

Insulation Resistance & Diagnostic Testing

• Insulation Resistance Range: From megohms (MΩ) to teraohms (TΩ)

• Polarization Index (PI): Evaluates insulation condition over time

• Dielectric Absorption Ratio (DAR): Assesses insulation absorption characteristics

• Step Voltage Testing: Multi-level evaluation of insulation response

• Timed Insulation Test: Adjustable durations for trend comparison

• Leakage Current Measurement: Detects current flow due to insulation degradation

• Capacitance Measurement: For cables and high-capacitance test objects

Display & User Interface

• Large Visual Display: Real-time readout of voltage, current, insulation resistance, and test time

• Intuitive Controls: Easy selection of voltages, modes, and test parameters

• Status Indicators: Clear visual feedback during tests

Safety Features

• Automatic Discharge: Safely discharges the test object after testing

• Zero-Start Interlock: Prevents output until test conditions are safe

• Voltage Presence Indicator: Warns if residual voltage remains

• Rugged Construction: Designed for industrial and utility field environments

• Operator Safety Design: Interlocks and warnings to minimize risk during high-voltage testing

Data & Connectivity

• Internal Storage: Saves test results for later review

• PC Connectivity: Export data for reporting and analysis

• Software Compatibility: Works with reporting and maintenance software

Power & Environmental

• Supply Options: Mains power operation with safety circuitry

• Operating Temperature: Suitable for field conditions (approx. –10 °C to +50 °C)

• Portable Design: Field-ready form factor suitable for utility and industrial environments

Typical Applications

• High-voltage cable insulation testing

• Transformer insulation diagnostics

• Switchgear and breaker insulation verification

• Motor and generator insulation assessment

• Preventive maintenance and commissioning testing

• Substation and utility test programs