Insulation Resistance Tester
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Frequently Asked Questions
Find answers to common questions about Insulation Resistance Tester
The price of an Insulation Resistance Tester in Bangladesh varies significantly based on the brand, voltage capacity, and features. For entry-level digital models (like the UNI-T UT501 series), prices typically start from BDT: 6,500 to BDT: 9,000. Mid-range professional units usually range between BDT: 14,000 and BDT: 35,000, while high-voltage industrial testers (5kV to 10kV) from premium brands like Kyoritsu or Hioki can cost BDT: 60,000 to BDT: 1,50,000 or more.
An Insulation Resistance Tester (commonly known as a Megger) is essential for identifying the health of electrical insulation. Over time, heat, moisture, and physical wear degrade the insulation of wires and motors. By using this tool, you can detect potential short circuits or leakage currents before they cause catastrophic equipment failure or fire hazards, ensuring the safety of your facility.
In the Bangladesh market, UNI-T is highly popular for providing a balance between affordability and reliability. For professionals requiring high precision and durability in harsh environments, brands like Kyoritsu, Hioki, Sanwa, and Fluke are the preferred choices. These brands are widely available through specialized industrial suppliers in Dhaka and Chittagong.
The Insulation Resistance Tester is primarily used to measure the total resistance between two points separated by electrical insulation. Key applications include:
Testing the integrity of power cables and wiring.
Checking motor and generator windings.
Preventive maintenance for transformers and switchgears.
Ensuring safety compliance in new electrical installations.
Choosing the right voltage depends on your specific application. A 1000V Insulation Resistance Tester is usually sufficient for residential wiring, small appliances, and low-voltage industrial equipment. However, for high-voltage systems like power transformers, large motors, or underground transmission cables, a 5000V (5kV) or higher tester is necessary to provide enough electrical "stress" to reveal insulation weaknesses.
Yes, you can purchase an Insulation Resistance Tester from several reputable sources in Bangladesh. General e-commerce platforms like Daraz offer basic models, but for professional-grade equipment with calibration certificates, it is better to buy from specialized industrial suppliers like BDTronics, MeterBD, or local shops in Nawabpur, Dhaka.
Several advanced features can drive up the price of an Insulation Resistance Tester:
Voltage Range: Higher voltage outputs (e.g., 5kV, 10kV).
Measurement Modes: Inclusion of PI (Polarization Index) and DAR (Dielectric Absorption Ratio).
Connectivity: USB or Bluetooth data logging capabilities.
Build Quality: Rugged, waterproof, or dustproof (IP rated) housing for field use.
While both measure resistance, a standard multimeter uses a very low voltage (usually 9V) which cannot detect high-resistance insulation leaks. An Insulation Resistance Tester applies a much higher DC voltage (250V to 10,000V) to simulate real-world electrical stress. This high voltage "pushes" through the insulation to find microscopic cracks or moisture that a multimeter would simply miss.
For critical industrial machinery, it is recommended to use an Insulation Resistance Tester during every scheduled preventive maintenance cycle typically every 6 to 12 months. For new installations, testing should be done immediately before commissioning to ensure the wiring was not damaged during the construction process.
