impedance | Page 3

impedance

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  1. 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...
  2. rolyberkin

    Resistance, Inductance, Capacitance and Impedance Questions

    Has anyone got any sample/revision questions for the 2365 302 for the above, just need to churn a load to get my head around them?
  3. 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?
  4. 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...
  5. 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...
  6. Simonslimline

    Resistance, Reactance, impedance video.

    Good video explaining resistance, reactance & impedance. https://www.youtube.com/watch?v=FEERuJlwBxE :smile:
  7. 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...
  8. 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...
  9. 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...
  10. 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...
  11. 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...
  12. 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...
  13. 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
  14. 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...
  15. 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...
  16. 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
  17. 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...
  18. R

    Impedance Zs

    hi everyone I have a question: Water heater 3kw the length of the circuit is 28m , the line and cpc 2.5mm2 How determine the expected Zs? I'm looking for in On-Side Guide but I do not know..... any suggestions please Thanks
  19. spud1

    High Earth Fault Loop Impedance readings caused by RCDs

    Hi everybody, I have encountered a problem with EFL (Zs) testing a couple of times recently. I have had unusually high readings for the length of circuit and earthing system type and the increase in impedance seems to be coming from resistance across the line pole of the RCD in the consumer...
  20. S

    Ze external earth loop impedance

    Hi I've done a Ze test on a TNS system and it's come back as 0.14 ohms is this reading ok as the max is 0.8 is there not a min amount you can have thanks

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