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Woodturning (rec.crafts.woodturning) To discuss tools, techniques, styles, materials, shows and competitions, education and educational materials related to woodturning. All skill levels are welcome, from art turners to production turners, beginners to masters. |
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Surge Protector for Nova DVR lathe
The manufacturer requires that a surge protector be installed to safeguard the electronics on the lathe. Is one really necessary in the UK?
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It is a good Idea to use surge protection with any type of electronic
controls. It does not matter where you are electrical surges can damage or destroy electronic components. Steven Raphael Ithaca Mi http://www.geocities.com/steven_raph...turnings1.html "Tony the Turner" wrote in message ... The manufacturer requires that a surge protector be installed to safeguard the electronics on the lathe. Is one really necessary in the UK? -- Tony the Turner |
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Tony - I sold electrical products for over 40 years and was around for
the introduction of surge surpression. Basically a surge surpressor is an insurance policy for electronics. You spend a small amount once and protect an expensive piece of equipment. ALWAYS WORTH THE COST! Just MHO, The Other Bruce ================================================== ======================== Steven Raphael wrote: It is a good Idea to use surge protection with any type of electronic controls. It does not matter where you are electrical surges can damage or destroy electronic components. Steven Raphael Ithaca Mi http://www.geocities.com/steven_raph...turnings1.html "Tony the Turner" wrote in message ... The manufacturer requires that a surge protector be installed to safeguard the electronics on the lathe. Is one really necessary in the UK? -- Tony the Turner |
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#5
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"The surge protector sacrificed itself to save the
electronics" is a classic myth. First, any surge protectors that fails due to a transient is grossly undersized and totally ineffective. Effective protectors SHUNT (don't stop, block, or absorb) the transient - and remain functional. Second, to promote the myth, many *feel* the protector sits between electronics and the incoming transient. Mechanically - yes. Electrically the protector and electronics are confronted by the transient simultaneously. They connect in parallel. Protector connects to AC mains just like another light bulb. Again, they are called shunt mode devices. To sit between transient and electronics, it must be a series mode device. Third, so what really happened? Protector was so grossly undersized as to be damaged by a transient that could not overwhelm protection inside the adjacent electronics. Electronics contain internal protection. But the protector can be undersized and damaged. Then the naive recommend more of these damaged protectors. If the protector was properly sized, then the human would never even know a transient existed. Again, electronics already contain effective protection. But that protection assumes destructive transients are earthed to not overwhelm electronics' internal protection. It is called 'whole house' protection - as was installed even 70 years ago. So inexpensive and so reliable that your incoming phone lines has one installed, for free, by the telco. Unfortunately, we still build new buildings as if the transistor did not exist. Then we let hearsay speculation claim "the surge protector sacrificed itself to ...". In reality, an effective, properly sized, and properly earthed 'whole house' protector makes that transient insignificant. An effective protector earths the destructive transient, remains functional, and leaves the human completely unaware that a transient even occurred. That is the difference between grossly overpriced, undersized, and ineffective plug-in protectors. No earth ground means no effective protection. Just another reason to grossly undersize the protector. The naive will then recommend and buy more of these $15 and $50 protectors. Effective 'whole house' protector costs about $1 per protected appliance. BTW, SL Waber once sold the same plug-in protectors sold by Tripplite, APC, etc. But SL Waber was also honest. This statement was on SL Waber EP63 Power Master protectors: This Surge suppressor is not a lightning arrestor and may not protect against lightning induced voltage surges. Why would a name like Tripplite or Belkin make the same circuit any more effective? It always comes back to the bottom line: a protector is only as effective as its earth ground. No earth ground means no effective protection. If not selling effective protectors, then grossly under sizing a protector means increased profits due to less costs and sales. The 'sacrificial protector' is another myth that sells ineffective protectors. LL wrote: On 13 Mar 2005 12:18:26 -0800, wrote: Tony - I sold electrical products for over 40 years and was around for the introduction of surge surpression. Basically a surge surpressor is an insurance policy for electronics. You spend a small amount once and protect an expensive piece of equipment. ALWAYS WORTH THE COST! Just MHO, Sadly true Around a year ago the audible alarm in my SL Waber "wavetracker" began to scream. A surge had come through frying a resistor and the zener diode contained within, but the connected electronics didn't suffer at all. My surge device died that the computer may live. So yes, surge protection devices, the good ones at least, are worth every penny you'll spend on it. BTW, I got my Wavetracker repaired since Tripp Lite bought the Waber company and immediately ceased production of what I think is one of the best devices ever made for the task. |
#6
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No matter what the load, the protection circuit would not have failed
due to the load because it is in electrical parallel (with the load) The Wavetracker is/was unique for a consumer surge protection device in that in is uses some very fast response components (zener diode, gas tube) and the usual MOVs as well as chokes for each outlet. These devices do shunt the spike to ground. Go large enough with a spike and they will fail the component - then the next component in line takes up the slack. For my device the first and fastest item in line (zener diode) is the one that failed. The "protection" you speak of other devices (computers, TVs, etc.) is the transformer in it's power supply. Do you really want a big spike to get in your expensive electronics? On Fri, 18 Mar 2005 11:59:05 -0500, w_tom wrote: "The surge protector sacrificed itself to save the electronics" is a classic myth. First, any surge protectors that fails due to a transient is grossly undersized and totally ineffective. Effective protectors SHUNT (don't stop, block, or absorb) the transient - and remain functional. Second, to promote the myth, many *feel* the protector sits between electronics and the incoming transient. Mechanically - yes. Electrically the protector and electronics are confronted by the transient simultaneously. They connect in parallel. Protector connects to AC mains just like another light bulb. Again, they are called shunt mode devices. To sit between transient and electronics, it must be a series mode device. Third, so what really happened? Protector was so grossly undersized as to be damaged by a transient that could not overwhelm protection inside the adjacent electronics. Electronics contain internal protection. But the protector can be undersized and damaged. Then the naive recommend more of these damaged protectors. If the protector was properly sized, then the human would never even know a transient existed. Again, electronics already contain effective protection. But that protection assumes destructive transients are earthed to not overwhelm electronics' internal protection. It is called 'whole house' protection - as was installed even 70 years ago. So inexpensive and so reliable that your incoming phone lines has one installed, for free, by the telco. Unfortunately, we still build new buildings as if the transistor did not exist. Then we let hearsay speculation claim "the surge protector sacrificed itself to ...". In reality, an effective, properly sized, and properly earthed 'whole house' protector makes that transient insignificant. An effective protector earths the destructive transient, remains functional, and leaves the human completely unaware that a transient even occurred. That is the difference between grossly overpriced, undersized, and ineffective plug-in protectors. No earth ground means no effective protection. Just another reason to grossly undersize the protector. The naive will then recommend and buy more of these $15 and $50 protectors. Effective 'whole house' protector costs about $1 per protected appliance. BTW, SL Waber once sold the same plug-in protectors sold by Tripplite, APC, etc. But SL Waber was also honest. This statement was on SL Waber EP63 Power Master protectors: This Surge suppressor is not a lightning arrestor and may not protect against lightning induced voltage surges. Why would a name like Tripplite or Belkin make the same circuit any more effective? It always comes back to the bottom line: a protector is only as effective as its earth ground. No earth ground means no effective protection. If not selling effective protectors, then grossly under sizing a protector means increased profits due to less costs and sales. The 'sacrificial protector' is another myth that sells ineffective protectors. LL wrote: On 13 Mar 2005 12:18:26 -0800, wrote: Tony - I sold electrical products for over 40 years and was around for the introduction of surge surpression. Basically a surge surpressor is an insurance policy for electronics. You spend a small amount once and protect an expensive piece of equipment. ALWAYS WORTH THE COST! Just MHO, Sadly true Around a year ago the audible alarm in my SL Waber "wavetracker" began to scream. A surge had come through frying a resistor and the zener diode contained within, but the connected electronics didn't suffer at all. My surge device died that the computer may live. So yes, surge protection devices, the good ones at least, are worth every penny you'll spend on it. BTW, I got my Wavetracker repaired since Tripp Lite bought the Waber company and immediately ceased production of what I think is one of the best devices ever made for the task. |
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