Search results

Its either a Pyronix twinalert or an early Pyronix break-glass detector (they had the same case)

Its an isolator & a DP fuse. If you pull the central knob then the middle porcelain section comes out towards you (until it reaches a stop) - forming the 'isolator' bit. If you now unscrew the knob the central piece can be completely removed, revealing the fuse wire underneath. I've only...

I agree with your points on not using a genny & the torque curves of a 3ph v 1ph motor ... but Japan is 200V L-L, Brazil is 220V L-L An inverter powered from 230V 1ph will produce 230V L-L 3ph (not 400V - they cant step-up the voltage) so the usual 'trick' is to reconfigure the motor from...

I'm still running DSM 4... Did you upgrade to DSM5 to correct an issue ? I'm running shy of upgrading because I still remember the grief in moving upto DSM4..... should I bother?

Those threaded connectors are SOCAPEX. These are generally used in the entertainment industry for stage lighting. They are 19 pin and usually wired 6 x LNE circuits & 1 shell earth, often configured as 2 circuits per phase. The cable is usually 19 core x 1.5mm2 or 19 core x 2.5mm2. Its usual...

Think you may have overlooked something here ..... Your genny is 6kVA so is capable of delivering around 6000/230 = 26A at full load..... but you are only connecting it to your distribution system using a 16A connector so you can only access 16 * 230 = 3680 VA ...... in effect your design only...

Are we still talking about the wife ??? :coat

The trick we used to use in 'telly OB land was a metal plate under one of the rear wheels. If the concrete/tarmac is wetted first & then the vehicle driven onto the plate is makes a surprisingly good earth.

2kW SON & Metal halide are available in both 415V cross phase versions and 240V single phase BUT they are different lamps and different gear - its not possible to use the single phase lamp with cross phase gear and vice-versa. All lamps are clearly marked to show which version they are.

Hi Dave, I think, when you put the 'scope on the CT output, you'll see that the waveform is a very poor sinewave - its going to be destorted by harmonics generated by switchmode power supplies & other electronic devices in the home. I assume that you are driving the CT into a burden...

Dave, I'm not sure this is correct. The phase angle between the voltage & the current is the power factor not the direction of power flow. There are methods to the direction of current flow using a polarising voltage but this isnt as simple as your method. Remember, for an inductive load...

There is a general trend towards downgrading to 80A but its got nothing to do with any "energy crisis" ... more to do with the fact the the DNOs have realised that for a large number of installations Ze is to large to allow a 100A BS fuse to open quickly enough, so, instead of doing the...

Have a look around the instrument manufacturers such as Eltime for a "Reverse Power" Relay. These are normally used on a generator to detect failure of the prime mover but the principle is still the same ... connected into the tails it would close a contact when the power following out of your...

Ok, I'll have a look at the PCB in the one on my bench.....you might be luck :-)

I've got an LCD19-106 on my bench at the moment.......let me know the part number of the PSU.... they might be the same :-)

Sounds like the classic dried out caps causing the SMPS to keep tripping. Its a very common problem. Try replacing any cap that seems to be leaking or has a domed top that seems ready to burst. The odds on this fixing the problem are very high - I've fixed loads of LCD monitors this way. Why...

You can get a 'digital modulator' that will convert a composite video signal into a 'digital signal' that can be picked up on a standard freeview box ...... not cheap though..... expect to pay around

Gents, thanks for your replies.... I did consider the standard type 12V fire detector head .... but thought that I'd prefer something more akin to the standard battery smoke alarm (so that it would still work locally, independantly of any fault in the intruder alarm panel and/or mains/12V...

Hi All, Looking to upgrade intruder alarm system to include smokes..... does anybody know of a decent ionisation smoke detector that is pref: i). Mains powered but with battery backup. ii). Includes an 'Escape light' iii). Has the option for a change-over relay thats operates when the...

I agree with Dave ..... I think you have mis-read the rating ....... 180kW of cookers in a pub kitchen? Thats gonna be one hell of a hot place to work! Also, not many pubs can support almost 270A per phase just for the cookers!