Question 1

What types of electrical testing equipment does PrecisionTest supply?

Accepted Answer

PrecisionTest supplies Insulation Testers (megohmmeters), Earth Resistance Testers, Power Quality Analyzers, Cable Fault Locators, Pat Testers, and Multifunction Installation Testers. All products are from authorized brands including Megger, Seaward, and Chauvin Arnoux.

Question 2

What is the difference between an insulation tester and a multimeter?

Accepted Answer

A multimeter measures voltage, current, and resistance at low test voltages (typically 9V), while an insulation tester applies high DC voltages (500V–5000V) to stress-test insulation and reveal degradation that a multimeter cannot detect. Insulation testers are essential for safety compliance testing of cables, motors, and transformers.

Question 3

Which Megger insulation tester is best for motor testing in Thailand?

Accepted Answer

For motor insulation testing, the Megger MIT400 series (1000V test voltage) is widely used for motors up to 415V systems. For high-voltage motors (6.6kV and above), the Megger MIT1000 or MIT2500 series are recommended. Contact PrecisionTest at 092-257-9979 for model selection guidance.

Question 4

How do I choose the right earth resistance tester?

Accepted Answer

Choose based on your measurement method: 3-pole or 4-pole fall-of-potential method for full earthing system assessment, or selective/clamp-on method for testing without disconnecting live earths. The Megger DET series covers all methods. PrecisionTest engineers can recommend the correct model for your application.

Electrical Testing Equipment

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