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Insulation Resistance Test On a Single Phase Board | PTT 

Proactive Technical Training PTT
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Use our guide to learn how to safely carry out an insulation resistance test on a single phase circuit, in accordance with BS7671, with our skilled trainer, Sam.
Insulation resistance is defined as the resistance to current leakage through and over the surface of the insulation material surrounding a conductor. It is measured in Ohm’s and its value represents a very important factor to electricians working within the electrical industry.
The insulation resistance test is an electrical test which uses a certain type and level of voltage to measure insulation resistance in Ohm`s. The measured resistance indicates the condition of the insulation between two conductive parts. An infinite resistance would be the perfect result, but no insulator is perfect, so the higher the reading the better. BS7671 defines the limits for Insulation Resistance tests.
To see some of our more in-depth training courses, head to our website and view our beginners courses:
www.proactivetechnicaltrainin...

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21 ноя 2019

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Комментарии : 10   
@Gardenworld831
@Gardenworld831 3 года назад
Do some more videos I watch alot of videos and your presentation is very good
@harrisonnjobvu9171
@harrisonnjobvu9171 3 года назад
Its so much helpful for students keep it up.
@danielsingh7211
@danielsingh7211 3 года назад
Great video
@simonoliver5327
@simonoliver5327 3 года назад
Thank you
@Robert-ts2ef
@Robert-ts2ef 3 года назад
Excellent instruction but I have one question: The star side of a delta/star supply transformer has the neutral connected to the central point of the star which is earthed so why would you not show zero ohms from neutral to earth, or am I missing something? Thanks
@Robert-ts2ef
@Robert-ts2ef 3 года назад
Could you please answer my question below to clear up the confusion for me which is why do you not get zero ohms between neutral and earth in the consumer unit if the neutral is ultimately connected to earth back at the supply transformer?
@daytonamann5618
@daytonamann5618 3 года назад
Hi Bernard, The neutral is isolated on the single-phase, so there is no connection between N-E when the isolator is switched off. You will get a short on insulation resistance in the 3-phase board on a TN system as the neutral is bolted direct to the neutral bar and so you have to then remove it to complete the test. Let me know if you need further?
@Robert-ts2ef
@Robert-ts2ef 3 года назад
@@daytonamann5618 cleared up my confusion, thanks.
@Raj-ul9my
@Raj-ul9my Год назад
Dont use 500v in real life, it will fry up electrical equipment in a domestic home including loads and stuff, use 250v then do calculation as if it was a 500v test. This way you dont need to remove light bulbs and stuff
@danielsmith4114
@danielsmith4114 3 года назад
I couldn't see what you were probing on to, in order to conduct the test and you didn't tell the viewer... ! Terrible video and a poor choice of cameraman.
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