504bloke
Lifetime Supporting Member
Hi
We are looking at a 100Hp 12 pole 490 rpm Slip Ring motor on a rubber mill. The existing system is a resistance reversing starter from about 1930.
We are pricing to replace the complete panel with a new starter panel using a vapormatic (electrolytic slip ring starter) for the slip rings instead of a resistance bank. This we have no problem with.
The customer has also asked for a price on using a VSD on the slip ring motor (with slip rings shorted out), has anyone got experience of this ? Any problems to forsee if we use a VSD ?
The VSD would have brake resistors fitted for the quick stopping and reversing.
edit: Just to add the stator has just been rewound so there is no problem with old 1930's insualtion!
We are looking at a 100Hp 12 pole 490 rpm Slip Ring motor on a rubber mill. The existing system is a resistance reversing starter from about 1930.
We are pricing to replace the complete panel with a new starter panel using a vapormatic (electrolytic slip ring starter) for the slip rings instead of a resistance bank. This we have no problem with.
The customer has also asked for a price on using a VSD on the slip ring motor (with slip rings shorted out), has anyone got experience of this ? Any problems to forsee if we use a VSD ?
The VSD would have brake resistors fitted for the quick stopping and reversing.
edit: Just to add the stator has just been rewound so there is no problem with old 1930's insualtion!
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