Recent content by Adrian41uk

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 :-)