Insulation Resistance Cable Testing

What is the standard value for cable insulation resistance?

If so1KVThe cable's insulation resistance value must not be less than10Zhaoyou.

If it is1-3KVOur cables require an insulation resistance value that cannot be less than200Zhaoyou.

If so6-10KVOur cables, their standard insulation resistance value should be greater than400MegaOmega

If so20-35KVOur cables meet the standard requirements for insulation resistance, which must not be less than...600Zhao Eu's.

If so220KVOur cables have higher standards for insulation resistance values, which cannot be less than...4500Mega-Om.

How to Measure Insulation Resistance

Insulation resistance can be measured using an insulation resistance tester, a specialized device. It is crucial to shut off the main power supply before measurement. While doing so, perform a short-to-ground discharge to avoid live measurements, as this can pose safety hazards.

Ensure the condition of existing high-voltage equipment is checked; if any induction is detected, it must be eliminated before proceeding with the measurement. Clean the surface of the item to be measured thoroughly to avoid any substances that could affect the resistance value, ensuring accuracy after measurement.

Ensure the insulation resistance tester is properly checked and functioning normally; primarily, observe“0The "∞" and "___" sections, turn the handle to reach the rated speed; if a short circuit occurs, the pointer will stop at "___".0The pointer stops in the "∞" area during the initial setup, which is normal.

Ensure the insulation resistance tester is placed flat, without any rocking or movement. Additionally, there should be no significant external current conductors or magnetic fields nearby. Once all requirements are met, connect the lines for testing, and the displayed value is the insulation resistance.