If you mean feeder or branch circuits, the basic principles are the same. The circuits should be completely de-energized and all loads disconnected before testing their insulation resistance. But there's a lot more than this. So if you wish to know more I suggest further reading, or better yet training for safety and proper implementation.
Thanks for your comments. I think you were asking where low resistance testing can be used? I believe it can be important in testing for contact resistance, for example, of switches, connectors, breakers, & relays. High resistance in these devices may indicate oxidation and poor contact, which can lead to heat. It can also be used to check for conductivity of wiring conductors- the lower the resistance the better. I'm sure there are other applications for it. While you can do these tasks using the Ohmmeter function of a general purpose digital multimeter, their Ohmmeter often cannot go below 1 Ohm. You cannot also calibrate their test leads to start at zero Ohms. So, if you want below 1Ω value, & you need to eliminate test leads' resistance, you need something else. Although the IR4057 not a dedicated low resistance meter, it has a relatively good resolution (0.01Ω), 200mA testing current, & zero ohm adjuster (0.00Ω). So it can quickly test for low resistance (below 1Ω) when very high accuracy and precision aren't critical.
@@narayanaya5519 Thanks for watching my videos. I share what I can & I also learn from others. Congratulations on your new IR4056-20👍! It has a low resistance function also. It is made in Japan & I am sure it will serve you well as an AC technician & in your other electrical projects, too. Good luck!
![[CC] Meiji 3-Phase 1HP Motor 220V/440V Unboxing, Insulation & Continuity Test](http://i.ytimg.com/vi/hJIjCsCG1AA/mqdefault.jpg)
![[CC] Meiji 3-Phase 1HP Motor 220V/440V Unboxing, Insulation & Continuity Test](/img/tr.png)
![How to Use the 2023 Hioki IR4056 Insulation and Continuity Tester- Unboxing and Review [CC]](http://i.ytimg.com/vi/QZMuLxMJQJk/mqdefault.jpg)
![[Part 1] ทารกน้อยถูกทิ้ง👶 หญิงชราเก็บขวดขายเลี้ยงดูเขาจนโต #โลกการละคร](http://i.ytimg.com/vi/nPTDvFCExks/mqdefault.jpg)
How to check IR Value 1phase and 3phase.
If you mean feeder or branch circuits, the basic principles are the same. The circuits should be completely de-energized and all loads disconnected before testing their insulation resistance. But there's a lot more than this. So if you wish to know more I suggest further reading, or better yet training for safety and proper implementation.
very informative
Salamat sa suporta Sir BP😄
First thanks for u then where it can be measured
Thanks for your comments. I think you were asking where low resistance testing can be used? I believe it can be important in testing for contact resistance, for example, of switches, connectors, breakers, & relays. High resistance in these devices may indicate oxidation and poor contact, which can lead to heat. It can also be used to check for conductivity of wiring conductors- the lower the resistance the better. I'm sure there are other applications for it.
While you can do these tasks using the Ohmmeter function of a general purpose digital multimeter, their Ohmmeter often cannot go below 1 Ohm. You cannot also calibrate their test leads to start at zero Ohms. So, if you want below 1Ω value, & you need to eliminate test leads' resistance, you need something else.
Although the IR4057 not a dedicated low resistance meter, it has a relatively good resolution (0.01Ω), 200mA testing current, & zero ohm adjuster (0.00Ω). So it can quickly test for low resistance (below 1Ω) when very high accuracy and precision aren't critical.
Thank you so much I bought 4056-20 after ur review 4057 -20, iam ac technician but I regularly watching ur video. 💓
@@narayanaya5519 Thanks for watching my videos. I share what I can & I also learn from others. Congratulations on your new IR4056-20👍! It has a low resistance function also. It is made in Japan & I am sure it will serve you well as an AC technician & in your other electrical projects, too. Good luck!
@@ramschannelreviews 🙏