Testing a 33 kV Rubber Mat? Here’s All You Should Know in 2025

Published On: January 17th, 2025By

A 33 kV rubber mat belongs to Class C of an IS 15652 standard electrical insulating mat. As the name suggests, the 33 kV rubber mat specification best suits for high-voltage applications- up to 33 kV or 33000 volts.
Thus, undoubtedly, it is crucial in industries that run on high-tension machines. While the 33 kV insulating rubber mat is expected to provide maximum safety to people standing on it- are you sure they will?

The price of this electrical mat is the highest of all the other classes. Are you getting the right product at the steep 33 kV rubber mat price you are paying?

Think twice! How do you know your 33 kV rubber mat is safe?

Yes, you are right! If you go for a certified 33 kV insulating rubber mat in India, it will end all your doubts.

Do you want to know how is a 33 kV rubber mat tested? Go through this blog now!

33 kV rubber mat specification

A 33 kV rubber mat or the Class C of the IS 15652 electrical mats is 3 mm thick. Its features are:

Class Max Use Voltage AC Proof Voltage Dielectric Voltage Standard Thickness
C 33.0 kV 36.0 kV 65.0 kV 3.0 mm

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Is it Compulsory to Test your 33 kV Rubber Mat?

Did you know an uncertified mat is sold cheaper than a third-party tested 33 kV rubber mat?
All 33 kV mat manufacturers will give you a ‘manufacturer’s test certificate’ when you ask for compliance documents. However, not all of them can provide you with an ERDA certificate. The BIS, or Bureau of Indian Standards, responsible for assessing the quality of various products by conducting a series of tests, is the certifying body for insulating mats in India.
For high-voltage applications, such as 33 kV, ensuring the mat’s dielectric strength and insulating properties is vital. Proper testing verifies:

  • Safety Compliance: Ensuring the mat meets standards laid out in the IS 15652 guidelines
  • Material Durability: Assessing the mat’s longevity under operational stress.
  • Electrical Insulation: Confirming the mat’s ability to withstand specified voltage levels.

Testing a 33 kV Insulating Rubber Mat: How is it Done?

Various aspects of a 33 kV rubber mat are tested using different methods. Some of the features tested are:

Dielectric Strength Test

This test measures the 33 kV rubber mat’s ability to resist electrical breakdown under high voltage.

  • Process: A controlled high voltage is applied incrementally to the mat until it reaches its dielectric limit.
  • Standard Requirement: For 33 kV mats, the dielectric strength should not exceed 65 kV to ensure safety margins.

Insulation Resistance Test

The insulation resistance test checks the electrical leakage of the 33 kV IS 15652 electrical mat.

  • Process: A megohmmeter is used to measure the resistance of the mat under varying conditions (dry and wet).
  • Expected Outcome: High insulation resistance, typically above 1 GΩ.

Tensile Strength and Elongation Test

These tests ensure the mat’s durability and flexibility.

  • Process: Samples are stretched to determine tensile strength and elongation percentage.
  • Requirement: Minimum tensile strength of 5 MPa and elongation at break above 250%.

Acid and Oil Resistance Test

A 33 kV rubber mat is mandatory in an array of industries, specifically in chemical refineries or oil extraction plants. Natural rubber degrades when exposed to chemicals or oil. But a 33 kV insulating rubber mat does not. The acid and oil resistance test evaluates resistance to chemicals commonly encountered in industrial environments.

  • Process: The mat is immersed in specific solutions and observed for changes in weight, appearance, or mechanical properties.

Flame Retardancy Test

An insulating mat is made of rubber, which is highly flammable. Still, as per 33 kV mat manufacturers, the mat has flame retardant properties- which is confirmed by this test.

  • Process: A controlled flame is applied, and the 33 kV insulating mat’s behavior (self-extinguishing or not) is monitored.

Compression Set Test

Assesses the mat’s ability to retain its original shape after being compressed.

  • Requirement: Minimal permanent deformation under load.

Equipment Needed for Testing a 33 kV Rubber Mat

The 33 kV rubber mat specification features are tested using many apparatus in an enclosed high-voltage set-up.

  • The High Voltage Tester (AC/DC Hipot Tester) tests the dielectric strength of a 33 kV insulating rubber mat in India.
  • A Megger measures the insulation resistance of the mat.
  • Customizing your 33 kV rubber mat size? A thickness gauge ensures the mat meets the required thickness for its voltage class.
  • A 33 kV rubber mat tests the mat’s ability to recover its original thickness after being compressed.
  • A surface tester inspects the irregularities on the mat like pin holes, puncture marks, etc.

Testing the mats: DIY or Seeking Professional Help?

You can inspect the electrical mat from time to time- rather, as specialists, we insist you do so. By doing so, you can minimize several risks. Moreover, you would know when is the right time to change your 33 kV electrical rubber mat.
Nonetheless, you should always trust professionals to be completely sure of the effectiveness of the mat. Before you enquire about the 33 kV rubber mat price, ask your supplier if they provide an ERDA certificate for the product!
Whether you’re a reseller or end user, prioritizing proper testing will protect both your workforce and your bottom line.

Duratuf IS 15652 electrical mats are ERDA certified. Do you want to see a copy of the testing certificate? Call us now!

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