impedance

  1. Rocboni

    Max Zs

    Hello, Having a bit of difficulty completing the below assignment, wondered if anyone can expand on this? Explain in detail the relationship between the Protective Device and the Earth Fault Loop Impedance, Maximum Zs for the protective device and how this is calculated, Maximum disconnection...
  2. C

    Fault Current Distribution

    Hello All, 1.Star connected earthed neutral Source to Star connected earthed neutral load? Say if a L-G fault occurs between the source and load, How does the fault current gets distributed? To the source side neutral or load side neutral? 2.Star- Star Transformer. Neutral earthed on both the...
  3. N

    High earth loop impedance

    Hello all, I am studying to be an electrician but outside of the classroom I have little experience. A friend has bought a house and during the buying process had an eicr with unsatisfactory result. Reading the report it shows the ring and shower circuit to have high earth loop impedance. I...
  4. gazdkw82

    Earth fault loop impedance

    Iv been given the scenario: 6 circuit earth fault loop impedance values were recorded. Each circuit has type B cb. referring to the maximum values, show by calculation if these values are acceptable. so I can't do zs =ze+R1/R2 because they've not provided me with ze. doing some research it...
  5. S

    Spanish Earth Road installation

    Hi, Quick question, does anyone know if there is a different spec to the U.K. for earth rods? I'm told in Spain they are longer but not sure if that is correct? Also are there any regs in Spain relating to the positioning of the rods etc (i.e. distance fro property)? Any advice greatly...
    • Spanish_sunbeds
    • Thread
    • different earth impedance installation not uk road whether
    • Replies: 6
    • Forum: UK Electrical Forum
  6. G

    Earth fault loop impedance

    How does earth fault loop impedance and disconnect time requirements change for 3phase 3 wire 230 volt systems where the phase to earth voltage is 133 volts instead of 230 volts?
  7. S

    Battery Storage And Uk Regulatory Compliance

    Hello all, I am thinking of adding battery storage to my existing setup to increase self-consumption and provide backup for power cuts. Currently I have 16 x 230W panels feeding 2 + 2 kW StecaGrid inverters installed in 2011. If I were to add for example a Victron MultiPlus 48/3000/35-50 in...
  8. J

    loop impedance tester

    Another question - :smile5: When did the use of loop impedance testers first come about? I tried to google it , but cannot find a definite answer, came up with an LCR meter though? So how would you know the Ze before they came freely available and I guess affordable - just by enquiry at...
  9. Simonslimline

    Resistance, Reactance, impedance video.

    Good video explaining resistance, reactance & impedance. https://www.youtube.com/watch?v=FEERuJlwBxE :smile:
  10. D

    high pfc domestic property

    hi, fitted new consumer in a domestic house. testing. ze 0.16 zs at origin 0.04 pfc 6.2ka the pfc is my problem, ohms law would make the pfc work out around 5.7Ka (using 0.04 as your resistance) (with all paths in place) using megger 1553 two lead test, high current, pefc and pscc are the...
  11. J

    loop impedance on lighting circuit

    Hi everone,I am new to the forum and think its brilliant,I am currently studying for my 2394&2395 and am testing everything in sight with a fluke 1651 multi functional tester.When i try to do a loop test on a lighting circuit,I follow all the instuctions,but i keep getting >2000 ohms,i am...
    • jimmymack56
    • Thread
    • circuit doing getting impedance lighting lighting circuit loop loop impedance something wrong
    • Replies: 43
    • Forum: Talk Electrician Forum
  12. K

    Impedance?

    *Thread Title Correction* Impedance Hi, I'm going over some choice revision for my 2365 Lvl 3 course and have come across the question "What is the impedance of a 200V 50Hz circuit containing 8A?". Although I am presuming I need to use AC Theory, I have gone over all of my notes on impedance...
  13. B

    For Sale Megger LTW 425

    http://www.test-mete...dcXmBoChmzw_wcB Same as the above, it's a year old but has only been used 3-4 times tops. I don't think it's in calibration still, but I can arrange to have it calibrated for anyone interested. Key specs below: Will post some photos when I get home later. I think...
  14. M

    110v earth loop impedance

    My test meter only works on 230v.... So... Is there a way of working out the Earth fault loop impedance on a 110v supply that is supplied by a hardwired 110v Centre tapped to earth transformer? Anyone else come across this. I have some additional 110v sockets to fit in a workshop but need to...
    • matdom
    • Thread
    • 110v doesn't earth impedance loop loop impedance meter
    • Replies: 10
    • Forum: UK Electrical Forum
  15. T

    Can you work out the value of the resistor?

    Hi guys, Just wondering if you can help me on this one, I have a RLC series circuit the values are as below; R = unknown L = 800mH C = 300uF from there I have calculated; the resonant frequency to be 10.3Hz the capacitive reactance 51.50 ohms The reason I need to know is I need to work...
    • thepipersson198
    • Thread
    • access electrical work frequency impedance out resistor value work
    • Replies: 4
    • Forum: UK Electrical Forum
  16. M

    Martindale EZ150 E-Ze check Xtra Non-Trip Earth Loop Impedance Socket Tester

    im bulding my first tool kit so i was browsing round for a socket tester and this came up. and it got me thinking how useful would the loop test even be. and wouldnt these need a calibration etc Martindale EZ150 E-Ze check Xtra Non-Trip Earth Loop Impedance Socket Tester | eBay
    • Mike Blair
    • Thread
    • check earth fluke impedance loop loop impedance martindale socket tester
    • Replies: 8
    • Forum: Electrical Tools and Products
  17. P

    Earth Fault Loop Impedance

    Hi all, I am hoping someone can clarify if my understanding on earth fault loop impedance testing is correct. A low efli is needed so a protective decive can operate in the required time, the lower the z the quicker it will operate. ZE= External resistance from borad to supply, board...
    • Patrick Griffin
    • Thread
    • circuit earth earth fault loop impedance fault impedance loop loop impedance measured value
    • Replies: 8
    • Forum: UK Electrical Forum
  18. S

    trouble with 2394/2395 revision queston

    hey guys.... ive downloaded some revision questions for my 2394/95 course i have booked for august and ive come across a question im a little unsure about......even when i have used the regs and GN3 to help. a little help would be greatly appreciated as there is no answer sheet for the...
  19. J

    Earth loop impedance test on 24v dc supply

    Hi, Excuse my ignorance. I have a electrical panel with a 240v ac to 24 v dc rectifier. The outgoing circuit breaker is 63amp as the 24v d will be stepped up by a power supply unit in the next panel. Is an earth loop impedance test required for the 24 v dc supply? Thanks
    • jackadam
    • Thread
    • 24v earth impedance loop loop impedance supply test
    • Replies: 11
    • Forum: UK Electrical Forum
  20. M

    Loop impedance test

    Hopefully someone can answer this query for me. I'm more used to domestic installations but have taken on a job in a workshop. The workshop is around 80m away from the intake which is a 3 phase TN-C-S supply. The workshop is new but I'm using an existing 16mm 4 core SWA cable. I'm using the...
    • mpelec
    • Thread
    • impedance loop loop impedance test
    • Replies: 12
    • Forum: UK Electrical Forum
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