devices for surge protection
Hi, If I add a MOV type device in parallel to the shore power cord will it offer some down stream protection to my RV?
Forum Discussion
Number One. What I describe uses fuses. Number two if you actually DISASSEMBLE a common "surge protector" you will see it consists of two l-o-n-g brass strip assemblies not the same league as a common 15 amp duplex receptacle. Want my fifty dollar pile of garbage famous brand surge strip?
Number three if you believe a metal oxide varistor is a years-long protector against voltage transients you need to go back to university and smack your professor upside the head. MOVS do indeed fail.
Number four. Work with an oscilloscope when discussing transients. Ever see an event with predominant INVERSE voltage wave form? A MOV S-T-A-R-T-S to react in nanoseconds when a TVS is fully involved.
The idea is to DRAIN not BLOCK positive and negative oriented events. Events deteriorate the integrity of any device but especially power and memory components.
If you need encouragement to believe event suppression is important in recreational vehicles survey the lifespan of appliances. They fail far too often. It is not that they are built differently but subjected to an environment when monitored on a scope will make a person's hair stand on end.
A voltage transient is N-O-T a "surge". Surges that last >100ms need voltage CORRECTION. Someone mentioned a high voltage distribution event. This can overpower even a voltage correction or even an EMS device. Such an event is the responsibity/LIABILITY of the power company.If a 12.5KV line should drop upon a 3KV line no device I know of is going to protect a service drop. >KV relay switches are used in transmission not distribution networks. Let's avoid lumping all forms of disturbances into a grand mishmash.
NEMA and UL regulations were revised because idiots marketed devices that did not incorporate fusing protection. There were indeed fires.
If you wish to argue whether TVS devices are valid do it in front of an oscilloscope. Then have campfire discussions with fellow RVers and tell them common electronics failures are all in their imagination.
If TVS devices were not needed thousands of pages of cataloging and white papers would not exist. IT IS EXPENSIVE for OEM to rice grain fuse protect each and every device. Properly constructed and oriented a GDT / MOV / TVS circuit is both safe and effective. Proper sizing of TVS discretes actually enhance the lifespan of MOVs. Each component serves a purpose and if you carefully re read what I wrote there are enough caveats and exclusions to answer questions.
SURGE PROTECTOR is a hated buzzword. Transient Voltage Protection serves a unique but overlooked purpose. A stepped transformer bucker down here can not react fast enough making ferroresonant voltage correction the only choice for inductive service line protection.
Time spent in front of an oscilloscope really does pay dividends.
Number three if you believe a metal oxide varistor is a years-long protector against voltage transients you need to go back to university and smack your professor upside the head. MOVS do indeed fail.
Number four. Work with an oscilloscope when discussing transients. Ever see an event with predominant INVERSE voltage wave form? A MOV S-T-A-R-T-S to react in nanoseconds when a TVS is fully involved.
The idea is to DRAIN not BLOCK positive and negative oriented events. Events deteriorate the integrity of any device but especially power and memory components.
If you need encouragement to believe event suppression is important in recreational vehicles survey the lifespan of appliances. They fail far too often. It is not that they are built differently but subjected to an environment when monitored on a scope will make a person's hair stand on end.
A voltage transient is N-O-T a "surge". Surges that last >100ms need voltage CORRECTION. Someone mentioned a high voltage distribution event. This can overpower even a voltage correction or even an EMS device. Such an event is the responsibity/LIABILITY of the power company.If a 12.5KV line should drop upon a 3KV line no device I know of is going to protect a service drop. >KV relay switches are used in transmission not distribution networks. Let's avoid lumping all forms of disturbances into a grand mishmash.
NEMA and UL regulations were revised because idiots marketed devices that did not incorporate fusing protection. There were indeed fires.
If you wish to argue whether TVS devices are valid do it in front of an oscilloscope. Then have campfire discussions with fellow RVers and tell them common electronics failures are all in their imagination.
If TVS devices were not needed thousands of pages of cataloging and white papers would not exist. IT IS EXPENSIVE for OEM to rice grain fuse protect each and every device. Properly constructed and oriented a GDT / MOV / TVS circuit is both safe and effective. Proper sizing of TVS discretes actually enhance the lifespan of MOVs. Each component serves a purpose and if you carefully re read what I wrote there are enough caveats and exclusions to answer questions.
SURGE PROTECTOR is a hated buzzword. Transient Voltage Protection serves a unique but overlooked purpose. A stepped transformer bucker down here can not react fast enough making ferroresonant voltage correction the only choice for inductive service line protection.
Time spent in front of an oscilloscope really does pay dividends.
