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BS for Star Delta starters

grahamro

I have an old, very old 2 contactor Star/Delta starter an Auto Memota 254SD to be precise..............

I'm just enquiring if this starter still complies with any relevant British standards.

I started my electrical journey in 1967 and this starter predates this time by about 30 years!

All my experience of S/D starters since I started out has been on 3 contactor types. It's starting a similar aged 10hp Crompton Parkinson induction motor.

Quite interesting watching the run contactor kick in when changing over from Star to Delta, there are arc shields over the contacts, I understand why now.

Any help much appreciated............I first posted this over in the engineering discussions but got no replies, I'm hoping my fellow hands on associates can help out.

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  • 0

    Well it might be fun to ask what British Standards a modern star-delta box needs to meet, and then see if this unit fails the technical requirements of that - I'd be surprised if the standards of the day when it was made are still current, but that does not mean the thing is instantly dangerous, but more of a 'treat with caution'.
    If you really do mean pre-war then the ideas of earthing of power circuits (recall that  2 pin unshuttered power sockets were OK at that time) was much more sketchy that it is today, and the level of what would now be called IP rating was not really defined. You may need to add an earth terminal or two and some strategic mesh or other guard over any finger sized holes.

    Do you have any pics of the internals ?

    Mike

  • +1 in reply to mapj1

  • 0 in reply to grahamro

    Hey presto.................................

  • 0 in reply to mapj1

    Any ideas about the twin windings in the coil??

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