Thanks for the replies. I'm busy fighting bots right now trying to get through to a human.
The Bohmer is a very capable little machine but the secrecy that surrounds it and many others is shocking.
As you say a new machine might be the answer. Decision time then is to get the same model or...
All
I'm in the UK and a couple of years ago bought a 3kVA inverter generator badged Bohmer AG I-5000. I believe the same set is also badged Clarke Power 3400W. The generator was always an absolute pig to start and during the last power outage I'll put my hand up to giving it a blast of easy...
Keep it simple. As you say in series. No auto restart so you will be forced to investigate the low level / pressure.
Worth checking that you don't need to 'inch' the motor to get the job away so a hand held trip override.
All
I'm looking for a PDF copy of the Brook technical info for 3 and 4kW 415V 50Hz motors.
I'm not sure whether they were trading as Brook Crompton, Brook Hansen or Crompton Parkinson at that time.
A copy or pointer towards a site would be great.
I've had loads of the catalogues over the...
All
I'm looking to source a replacement panel heater.
ATEX Exd IIC T5
250V
200W
readily available to the UK.
Preference is a single 200W heater but if I need to make the wattage from several heaters so be it. Our single phase voltage is healthy and well exceeds 230V.
Any ideas on...
Is this not the Exd Exde situation where a motor might be Exd but the associated terminal box is Exe. An Exd motor with an Exe terminal box would be Exde.
An Exd enclosure is certified specifying size, power within etc and this is difficult to do with the terminal enclosure hence the hybrid.
You can't up the IP rating from IP55 to IP56. The OEM went through a lot of pain getting the motor certified to IP55.
What you might have control over though is the environment. Are you able to construct barriers etc to shield the motor from high pressure jetting? It might be a cover over...
You say you have a 150kVA supply but don't give an impedance. So with a few assumptions in place I've got a fault current at the transformer of about 3500A. Travel even a short distance through the feeder cables and 3500A till drop quickly. I don't know what the fuses are but a BS88 takes 1...
On with some maintenance on an 11kV board.
Knowns - we know the utility supply cable is in poor state but that's their cables.
our incoming switch is out of the board.
The bushings have been examined and are as new.
Connections at the back are shrouded but appear good and have not been touched...
Thanks for the link. I am in the UK so HG230 and the HSE are very relevant. clearly any degreasing would need to be followed by application of the manufacturers lubricants / grease.
You say field switchgear. The impedance of the cabling between the transformer and the switchgear although likely minimal will cause the fault level to drop very quickly and likely to end up lower than your 25kA. Increasing the cable route length slightly might easily get you to where you want...
Has anyone got experience with the now defunct Terasaki AT25 ACB.
The breaker is on a 415V LV system and rated at 2500A. Nice cosy environment, never been used on a fault in anger, not very many operations and about 25 years old.
The auto close mechanism is in good condition but caked in OEMs...
Hope to be getting some more figures in a few days time.
I've managed to get a much larger snapshot of the winding temperatures and can prove this is cyclic so more relaxed with that.
The machine is coming off bars later this week so I can check values then.
