Insulation Tester Singapore

Test with confidence. Identify insulation deterioration before it becomes an electrical safety or equipment reliability problem.

Apex Test Instruments supplies insulation tester solutions in Singapore for electrical maintenance, troubleshooting, commissioning and preventive testing. Our range includes HIOKI digital insulation resistance testers and high-voltage models suitable for testing electrical installations, cables, motors, transformers, solar PV systems and other electrical equipment.

Whether you need a compact tester for routine field work or a high-voltage insulation resistance tester for demanding industrial applications, our team can help you select the right instrument for your required test voltage and measurement range.

Insulation can deteriorate because of age, moisture, contamination, heat, mechanical stress and prolonged electrical loading. The problem is that this deterioration may not always be visible during a routine inspection.

Weak insulation can contribute to:

• Leakage current and electrical faults
• Unexpected equipment shutdowns
• Reduced motor, cable or transformer reliability
• Increased maintenance costs
• Electrical safety risks
• Difficult-to-diagnose intermittent problems

An insulation resistance tester, sometimes called a megohmmeter or megohm meter, applies a controlled DC test voltage and measures the resistance of the insulation.

This gives technicians valuable information about insulation condition and helps identify deterioration before it develops into a more serious fault.

For maintenance teams, electricians and engineers, reliable insulation testing supports better preventive maintenance decisions rather than waiting for equipment to fail.

Not every electrical system requires the same test voltage or measurement capability.

Apex Test Instruments offers HIOKI insulation testing equipment suited to a range of field and industrial requirements.

Routine Electrical Insulation Testing

For general electrical maintenance and installation work, a digital insulation tester can provide fast insulation resistance measurements across commonly used test-voltage ranges.

Typical applications include:

• Electrical installations
• Wiring and distribution circuits
• Motors
• Electrical equipment
• Maintenance inspections
• Solar power systems
• Electric vehicle-related electrical testing

High-Voltage Insulation Resistance Testing

Transformers, power cables, motors and other high-voltage equipment may require considerably higher test voltages and resistance ranges. High-voltage insulation testers are designed for these more demanding applications and can help maintenance professionals evaluate insulation condition on critical electrical assets.

Solar PV Insulation Testing

Insulation testing is also important when inspecting photovoltaic systems. Selecting an instrument designed for the electrical characteristics of PV installations can make testing safer, more efficient and more reliable.

Our current range includes models for both standard and high-voltage insulation resistance testing.

HIOKI IR4057-50 Insulation Tester

A 5-range digital insulation resistance tester covering test voltages from 50 V to 1000 V. Designed for fast field testing with digital readings, PASS/FAIL response, continuity testing and AC/DC voltage measurement.

HIOKI IR5050 High Voltage Insulation Tester

Designed for high-voltage equipment such as transformers, cables and motors, with test voltages from 250 V DC up to 5000 V and insulation resistance measurement up to 10 TΩ.

HIOKI IR5051 High Voltage Insulation Tester

A compact high-voltage model capable of testing up to 5 kV and 10 TΩ. It is also designed for insulation resistance testing of solar PV systems during power generation.

HIOKI IR3455 High Voltage Insulation Tester

A high-voltage digital megohmmeter offering 250 V to 5000 V testing, resistance measurement up to 10 TΩ, memory functions and insulation diagnostic capabilities.

Choosing electrical test equipment is about more than comparing specifications. The instrument must fit the application, expected measurement range, test voltage and working environment.

Apex Test Instruments combines product supply with technical and application knowledge to help customers make a more informed choice.

20+ Years of Test & Measurement Industry Experience

Apex Test Instruments’ key management team brings more than 20 years of experience in the Test & Measurement industry, supporting customers across different electrical testing requirements.

Technical & Application Support

Unsure whether you need a standard insulation resistance meter or a 5 kV high-voltage tester? Our team can assist with product selection based on your testing application.

Established Test & Measurement Product Range

Apex supplies professional electrical testing and measurement instruments for maintenance, diagnostics, installation testing and industrial applications.

Pre-Sales & Post-Sales Support

Our focus extends beyond supplying an instrument. Apex provides technical and application support before and after purchase to help customers select and use suitable testing solutions.

Singapore-Based Test & Measurement Supplier

Work with a specialist supplier that understands the requirements of electrical, maintenance and engineering professionals in Singapore.

Need help choosing a model?

Tell us what equipment you are testing, your required test voltage and your application. Our team will help identify a suitable option.

What is an insulation tester used for?
An insulation tester measures the electrical resistance of insulation in wiring, cables, motors, transformers and other electrical equipment. It helps detect insulation deterioration, moisture, contamination and potential leakage paths that may affect electrical safety or equipment reliability.

What is the difference between an insulation tester and a multimeter?
A multimeter measures parameters such as voltage, current and resistance using relatively low test voltages. An insulation resistance tester applies a much higher DC test voltage to measure insulation resistance, usually in megohms or higher. It is therefore designed specifically for evaluating electrical insulation.

What test voltage should I use for insulation resistance testing?
The correct test voltage depends on the equipment, circuit voltage, manufacturer requirements and applicable testing procedure or standard. Common insulation test voltages include 50 V, 100 V, 250 V, 500 V and 1000 V, while high-voltage equipment may require testing at several kilovolts. Always follow the equipment manufacturer’s instructions and applicable electrical safety requirements.

What is a megohmmeter, and is it the same as an insulation tester?
Yes. A megohmmeter, megohm meter or “megger” is commonly used to describe an instrument that measures very high electrical resistance. Modern digital insulation testers perform this function by applying a specified DC voltage and measuring insulation resistance.

Accurate insulation testing starts with the right instrument.

Whether you are carrying out routine electrical maintenance, motor testing, cable testing, transformer diagnostics, solar PV inspection or high-voltage insulation testing, Apex Test Instruments can help you choose a tester that matches your measurement requirements.

Tell us what you need to test. We’ll help you identify the right insulation testing solution.