Megger MIT515

The Megger MIT515 5kV Insulation Resistance Tester is a high-performance, rugged, and portable instrument engineered for precise insulation resistance testing on medium-voltage electrical equipment and installations. Designed to meet the needs of utility, industrial, and commercial users, the MIT515 delivers stable DC test voltages up to 5 kV, providing accurate insulation resistance measurements critical for identifying deterioration, moisture ingress, aging, or defects in insulation systems.

Featuring advanced measurement technology, the MIT515 is capable of assessing insulation resistance over a wide range, from megohms (MΩ) to teraohms (TΩ), ensuring reliable diagnostics for power cables, motors, generators, switchgear, transformers, and surge arresters. Its robust build and ergonomic design make it ideal for field testing, preventive maintenance programs, commissioning, and troubleshooting applications.

The instrument supports a full suite of test functions including:

• Insulation resistance (IR) testing at selectable DC voltages up to 5 kV

• Polarization Index (PI) for evaluating insulation condition over time

• Dielectric Absorption Ratio (DAR) for deeper insulation assessment

• Leakage current measurement for precise evaluation of insulation breakdown

• Automatic discharge of the test object after completion

Safety and operator protection are core strengths of the MIT515. The tester incorporates multiple safeguard features such as zero-start interlock, clear warning indicators, and built-in discharge circuitry to ensure safe high-voltage testing in field environments. A large, clear display presents real-time readings of voltage, resistance, and test duration, while intuitive controls allow quick test setup and execution.

To support documentation and asset management, the MIT515 includes internal data storage with options to transfer results to a PC for reporting and trend analysis. This makes it a valuable tool for condition-based maintenance, quality assurance, and compliance verification activities.

Whether assessing the insulation quality of underground cables, evaluating motor winding condition, or verifying transformer insulation integrity, the Megger MIT515 offers dependable performance, safety, and accuracy that professionals rely on to maintain electrical system reliability and longevity.

Specification

Test Voltage & Output

• Maximum Test Voltage: Up to 5 kV DC

• Selectable Output: Multiple test voltage levels (e.g., 500 V, 1 kV, 2.5 kV, 5 kV)

• Controlled Voltage Ramp-Up: Smooth application of test voltage to prevent insulation stress

• Stable Output: Maintains DC output for accurate measurement on high-capacitance loads

Measurement & Test Functions

• Insulation Resistance (IR): Measurement from megohms (MΩ) up to teraohms (TΩ)

• Polarization Index (PI): Standardized ratio measurement for insulation condition assessment

• Dielectric Absorption Ratio (DAR): Secondary diagnostic test for insulation absorption characteristics

• Leakage Current Measurement: Detects leakage behavior related to insulation condition

• Automatic Discharge: Safely discharges the test object after test completion

Display & User Interface

• Large Digital Display: Clear real-time readout of voltage, insulation resistance, and test time

• Intuitive Controls: Easy selection of test voltage and mode

• Status Indicators: Visual alerts for test progress and safety warnings

Safety Features

• Zero-Start Interlock: Prevents output until safety conditions are met

• Warning Indicators: Visual signals for test voltage and discharge status

• Built-In Discharge: Ensures test object is safely discharged after measurement

• Robust Enclosure: Designed for field and industrial test environments

Data & Connectivity

• Internal Data Memory: Stores test results for later review

• PC Connectivity: Transfer results to a PC for reporting and trend analysis

• Software Support: Compatible with PC reporting and analysis packages

Power & Environment

• Power Supply: Mains powered with safety circuitry

• Operating Temperature: Suitable for typical field conditions

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

Typical Applications

• Insulation testing of medium-voltage power cables

• Motor and generator winding insulation assessment

• Switchgear and transformer insulation diagnostics

• Preventive maintenance and commissioning testing

• Electrical asset condition monitoring