Resistance Welders
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Re: Resistance Welders
Actually this machine has two 150 KVA welders on it but they only fire one at a time so you calculate for one. We've got 50+ welders (robots and pedistal)ranging from 50 to 200 KVA. They are used for spot welding automotive parts together. They are programmed to "step" the current to compensate for tip wear during the shift.
Refering to Article 630.31(A) what size service would be used if conducters cannot be rated less than 50% of the primary current on manually operated welders? Max primary amps is 312.5 Am I reading this right that I only need to feed this with a 175 amp service? And If I'm not confused enough, what about the percentages on fusing?
And because the current "steps" I don't need the multiplier on the duty cycle(Article 630.31(B))?
Actually this machine has two 150 KVA welders on it but they only fire one at a time so you calculate for one. We've got 50+ welders (robots and pedistal)ranging from 50 to 200 KVA. They are used for spot welding automotive parts together. They are programmed to "step" the current to compensate for tip wear during the shift.
Refering to Article 630.31(A) what size service would be used if conducters cannot be rated less than 50% of the primary current on manually operated welders? Max primary amps is 312.5 Am I reading this right that I only need to feed this with a 175 amp service? And If I'm not confused enough, what about the percentages on fusing?
And because the current "steps" I don't need the multiplier on the duty cycle(Article 630.31(B))?
Re: Resistance Welders
Surely any machine as complex as this must have complete design and operation specs. I would not guess, go to the designers, let them turn it on and zap the first car.
Mark the first car so I don't buy it
[ January 08, 2004, 05:40 PM: Message edited by: bennie ]
Surely any machine as complex as this must have complete design and operation specs. I would not guess, go to the designers, let them turn it on and zap the first car.
Mark the first car so I don't buy it
[ January 08, 2004, 05:40 PM: Message edited by: bennie ]
Re: Resistance Welders
Yes, a machines as complex as these SHOULD have spec.'s. However...
Our welding expert wears velcro on his shoes because laces are beyond him. So I end up trying to figure this stuff out and with the "just in time" mentallity I've got to have it hooked up 10 minutes before its out of the crate.
Buy a Huffy or a Schwin as we don't make bicycle parts.
Yes, a machines as complex as these SHOULD have spec.'s. However...
Our welding expert wears velcro on his shoes because laces are beyond him. So I end up trying to figure this stuff out and with the "just in time" mentallity I've got to have it hooked up 10 minutes before its out of the crate.
Buy a Huffy or a Schwin as we don't make bicycle parts.
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