In the world of electrical safety, insulation is your first line of defense. Whether in power cables, switchgear, or motors, insulation prevents leakage currents, electric shock, and costly equipment failure.
At Intertest Limited, we offer professional Insulation Resistance (IR) Testing to ensure the health and safety of your electrical systems — helping you stay protected and compliant.
✅ What is Insulation Resistance Test?
Insulation Resistance Testing measures the quality of electrical insulation in cables, wires, and electrical equipment. Using a megohmmeter (commonly known as a megger), we apply a DC voltage to evaluate the resistance value — higher resistance means better insulation.
🚨 Why is it Important?
Over time, insulation can degrade due to:
- Heat
- Moisture
- Dust or chemicals
- Mechanical stress
This leads to leakage currents, short circuits, and sometimes even fire hazards.
Regular IR testing helps to:
- Detect insulation damage early
- Prevent short circuits and shocks
- Extend equipment life
- Ensure workplace safety
- Meet BNBC, BSTI, and IEC standards
📊 What is a Good Insulation Resistance Value?
| Equipment Type | Minimum IR Value |
|---|---|
| Power cables | ≥ 1 MΩ per 1000V |
| Motors & transformers | ≥ 1 MΩ (typically more) |
| Control circuits | ≥ 2 MΩ |
Note: Acceptable values may vary depending on system voltage and environmental conditions.
🧪 Where We Perform Insulation Tests
- Power and control cables
- Motors and pumps
- Switchgear and distribution boards
- Electrical panels and UPS systems
- Generators and transformers
🧑🔧 Why Choose Intertest Limited?
With certified technicians and advanced testing instruments, Intertest Limited ensures reliable, standards-compliant testing.
What we offer:
- ✔ Accurate digital megger testing
- ✔ Pre- and post-maintenance reports
- ✔ Fault identification with actionable recommendations
- ✔ On-site or lab-based testing
- ✔ Reports accepted by authorities, audit teams & compliance bodies
📄 What You’ll Receive in the Report
- Equipment details
- Insulation resistance values
- Voltage used during testing
- Pass/Fail status
- Maintenance or repair suggestions
📆 When Should You Test?
- During routine electrical maintenance
- Before commissioning new equipment
- After water damage or suspected faults
- Prior to annual safety audits
📞 Book Your Insulation Test with Intertest Today
Don’t let faulty insulation put your people or property at risk. Let our experts inspect, test, and protect your electrical systems.
📍 Intertest Limited
🌐 www.intertest.com.bd
📧 Email: info@intertest.com.bd