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output

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  1. S

    For sale BNIB Hager 125kWh Meter Kit Plused output

    Hi guys I'm looking to offload a 125 TPN meter kit, never used in brand new in box. Been in my possession for a while and looks like the client intended for wont be requiring. Looking to get around £350 but willing to listen to offers. PM me if interested.
  2. C

    PV Output Calculation Steps

    Hi guys, For my current dissertation project at The University of Strathclyde, I am attempting to build an Excel model which calculates PV output for given direct and diffuse solar radiation levels. I have attached below the calculation steps (within figure and as attachment) that I was taught...
  3. Worcester

    Solaredge zero output

    Anyone else had this problem? Client rang last week to say his system hasn't been generating since September (duh....) Attended site, 8V off the panels (2kw - 8 x 250W east / west split) Power Ok to inverter, checked the fuse as per Solar edge instructions - appeared to be 'blown' so...
  4. C

    Lower energy generation from all black panels?

    Afternoon. I have potential customer questioning whether all black panels will perform as well as panels with a white backing on the basis that they will become hotter more quickly affecting energy generation on warm sunny days. I can understand the logic but have never seen hard evidence to...
  5. HappyHippyDad

    Voltage drop and it's effect?

    Hello all, just been thinking over Voltage drop!! 1. Where does the 3% and 5% figures for voltage drop (VD) come from? Appendix 4 (BS7671) gives the figures but why the different values between lights and sockets? 2. Also permitted voltage levels are -6% and +10% from 230V giving a min of 216V...
  6. C

    Suspected interference on sky box rf2 channel 68 output to second tv

    "Hello All", I have a problem with bad interference on the reception of my Home`s TV`s that are connected to Sky Digiboxes in other rooms via satellite quality co-ax cables [Sky Box RF2 output] - this has just started yesterday and the Sky TV is un-watchable on these TV sets. The affected TV`s...
  7. joel89

    Tv Aeiral installation

    I have recently installed a new aerial mega booster with a 1 in 4 out amplifier, it comes with a 12v signal booster which has to power it, my question is I'm feeding 4 TVs do i need to signal boost each cable individually?! As on the booster its only got 1 input from amplifier on the aerial, and...
  8. A

    Rewire 5-pin output to an audio jack

    Hi all, First of all, sorry if this is the wrong forum to post this question in, it seems i'm not allowed to post in the DIY forum. Some context if needed: I am a non-technical student and I’m currently doing research on respiratory variations in coronary blood pressure traces. These coronary...
  9. truckster

    Led drivers brain fart

    Am I having a brain fart?? I fitted 4no. two gang sockets fed from a 5A fuse in a shop for display lighting. The shop fitters arrived some time later and fitted a bunch of LED lights. Each driver states input as 1.2 amps and there are sixteen of them?? However each driver is only supplying...
  10. F

    3 phase heater problem

    Hi there, I have a number of 22kw heater sunning of 3 phase supply. There is a dial with 4 settings 1 being the lowest output 4 the highest. The problem I have is when ever it is set to maximum output it is knocking out the breakers not discriminating at the rcd but knocking out the main...
  11. W

    Comparing my PV output with other nearby systems

    When I was researching PV through this site I am sure I found a link to a website where countrywide, or even internationally folk were uploading their generation data. Having spent a good hour googling and searching within the forum I have drawn a blank. Can someone help please. Thanks.
  12. Marvo

    Monitoring UV output

    I have designed an air purifier which we've manufactured and installed several of over the last couple of years. It consists of 3 stages of air filtration through course, medium and fine 500x500mm element filters followed by a final filter stage which has 12 cassette type HEpA filters. Before...
  13. T

    Generator and UPS

    Hi all. Hoping somebody can help with an issue I'm having at a school I do maintenance work at. They have a geni with auto transfer switch and ups providing back up to the IT equipment and phones. The ups works fine when geni is disconnected, but as soon as the geni fire's up the ups goes...
  14. U

    Solar River 4000TL-D, can you change the scale on the output graphs?

    Customer has this inverter with 16 panels. Happy with system but when looking at the historical data on the inverter the annual history has a scale such that in November to March there's hardly anything to show and even in a sunny April, with about 500Kw it's only going to be a small block on...
  15. S

    Ups output voltage anomaly

    I have been looking at an active UPS system in a lab feeding a small consumer unit and carrying out a periodic inspection of the fixed wiring (much help on avoiding problems with Zs values thanks to other posts on here). I did however come across an anomaly on the actual output voltages under...
  16. R

    PLC switching

    If you wanted to use an output of a PLC to start a DOL motor, would the PLC output power be used to energise the coil on the contactor at 110v,
  17. F

    Fascinating PV output in thunder storm

    In recent weeks, on sunny mornings, my 3.7kWp array (ESE-facing, in Cambridgeshire) has been peaking around 1.7kW output between around 10:30-11:00am. This morning was much the same, with reasonable sunshine and an output of 1.6kW around 10:30am. Then some very dark cloud rolls in, hailstones...
  18. G

    Generator + UPS Woes

    Greetings, I'm in the Philippines and have an office full of PCs that need to run with as little interruption as possible. Power is pretty reliable here in general, but we have rotational blackouts for an hour a day at the moment due to a regional shortage caused by damage from the typhoon in...
  19. M

    Mains to 12v Appliance?

    First of all, I have minimal knowledge of anything electrical so please forgive my ignorance! My problem is that I bought a portable heated handwash unit from eBay which is designed to go in a van. It's 12v 15a and 180w. You can see the unit in question here: Handeman for motor vehicles |...
  20. P

    Problem with CCTV output

    Today whilst fitting a interface for fire alarm where I was mounting this next to it was a fuse spare where the face was lose......so whilst I had my flathead out I thought I would crank it up abit......massive mistake, big flash, live had come out blew me izzy up, any way took it off it was...

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