difference between different classes of surge arresters?
336135
Basically the electrical energy it can absorb before it blows up. The energy is converted to heat.\n\nThe larger the coulombs capacity the more energy it can absorb.\n\nA firecracker can be small peanuts compared to an lightning or surge arrester blowing. Debris is thrown out like a grenade.
472935
2 main types i know of only. Water tubes n smoke tubes.of course for each of these they have their sub classes. if u go by the brand n features to further classify them, the list is probably very long.
181815
Well.. they are all the same material, the Shields have different colors for one reason.. to give you the ability to distinguish them!\n\nThe only difference between them all is the (Order) they come in .. the RJ45 which is the thing that is fixed to the end of the cable has "8" copper tiny little pins when you look at it from the back (where you can't see the hook) you start counting from the LEFT .. this means the very first pin on the left is numbered 1 and the last is numbererd 8 the pins (and accordingly) the cables who are responsible for the data transmission are pins (1,2,3, and 6) and it MUST go the same order on the other end in order to make the cable properly connective!\n\nThere are two different ways you can arrange the pairs in the cable\n\n1. normal arrange (any colors to be set exactly the same on both ends) and this sort of cable is used when you have a hub or a switch that will connect a group of computers all together.\n2. cross cable -- and this is used when you want to connect two computers directly using theirNIC's (network interface cards) as a back to back connection without the need of a hub or a switch and in this type of cables all you have to do is change the two ends cable order 1 on one end goes to 3 on the other end and 2 goes for 6 and you have a cross cable :-)
545118
A motor circuit protector (MCP) is a magnetic only (short circuit only) device that will operate under short circuit conditions in excess of its instantaneous tripsetting.\n\nThermal-magnetic circuit breakers have a thermal circuit interruption function and a magnetic interruption function. The thermal function uses heat-sensitive bimetallic elements that respond to overload electrical currents. The magnetic function responds to very high current overloads such as those that might occur during short-circuit conditions.\n\nIt looks like the significant difference is that the thermal-magnetic circuit breakers use both thermal and magnetic interrupts, while the motor circuit protector only uses a magnetic interrupt.\n\nI hope that this helps.\n\nCheers\nAlister\nhttp://www.marketscience.com.au
604177
well, it would differ from every kind of batery. the duty cycle would be the bateries best discarge per cycle(if that is what you are talking about) deep cycle bateries are capable of going into a deeper discharge on each cycle(charge and discharge)
91121
If you are worried about a power surge in the cable, run it through a surge protector that has coax connectors.
398806
here is one of the datasheets available on the internet:\nhttp://www.ee.washington.edu/stores/DataSheets/74ls/74ls73.pdf
1056436
Let me answer this way:  The static charge built up between the clouds and earth (ground) cause the air between to become ionized (lightening) causing a discharge of (usually) millions of amperes of current, neutralizing (minimizing) the charge.\n   And as you know, an efficient arrestor is designed to prevent any great voltage rise during the discharge.
5816
I would recommend not.  Two years ago, my Sony Vaio's telephone modem suddenly stopped working during a lightning storm.  The lights hadn't dimmed or anything, so I thought it was just a glitch.  The technician said that just because the power supply was protected by a surge protector, the phone line (which was not plugged into a surge protector) experienced a surge when a telephone box blew a few blocks away (it was a bad storm, but I just had to check my email).  The surge wouldn't have hurt someone on a normal phone, but was just enough to disrupt my delicate computer.  So unless its urgent, or you can work off the power grid (like a laptop), I'd just leave the computer turned off in a storm.
207509
Both defibrillators are good products, but the hospital where I work uses mostly Medtronic equipment.  Tends to be more reliable and have more company reps in the area for faster repairs.  But don't make your decision on which is better, you should definately be more worried about how easy will it be for one of the company reps to come and make adjustments to your defibrillator if needed.  Some companies you have to wait two weeks unless it's an emergency to get someone to come out and repair their equipment
270046
A power surge can cause multiple drives/devices to fail at once.  Also, if your power supply starts to go out, it can take other components with it.
1052215
In New England, voltage regulator rules by ISO New England are pretty strict for power generating stations.  Because the large generating stations are tied to the 345,000 volt grid, one station typically cannot effect the grid's voltage or frequency.  Most surges seen at the customer level are caused by the local distribution system.  Traffic accidents, tree branches, utility pole transformer failures for example often cause sudden surges to homes.
1005273
because you dont have a surge protector\nbuy one and you wont need to worry
474309
to reduce air pressure sudden surge
278177
The device electrically separates the water heater from the household piping. \nIt also provides a convenient way to disconnect the piping for removal or servicing of an appliance, such as a water heater or water softener.\n\nRefer the link for pictures
1040867
Using 3 phase current, it is possible to get 3 times the energy down the same wire - so it is much more efficient.  Each phase is 120 degrees out from the others, so the signal looks kind of like braided hair, when one phase is at the peak, the other two are crossing at 70%, one going up the other going down.  Once we get the energy to where we want to use it, then we can tap off the different phases for single phase use. \n\nI forget about the delta and wye stuff, it's been a while. \n\nCheers!
580159
The AC Switch Block allows a conventional 5V signal to control a much larger AC line. The switch can handle up to 16 Amps of current provided it is kept cool enough. At 110V, this is more than 1500W. We suggest that this limit be approached very carefully and recommend staying far beneath this.\n\nOnce an AC line is connected to the AC terminals, several places on the board will become live. This makes it absolutely essential that the board be mounted in a way that will prevent short circuits and accidental human contact. This is true even for rough prototypes or trial hook ups. Treat AC line voltages with much respect.\n\nHow Do I Use This?\nWith your AC device unplugged, first determine which cable from your AC device's power cord should be switched. It's best to switch the "live" or "hot" wire. On any AC outlet, there are usually 3 slots (sometimes 2). The right slot, which is slightly smaller than the left slot, is the "live" slot - check which prong plugs into this slot when you plug the AC device in to confirm which wire is live.\n\nOnce you've determined which wire is live, snip it in two somewhere along its length, strip about 1/8" insulation away from both the open ends, and tin the exposed wires. Make sure to leave enough slack on the cord for the two tinned ends to be inserted to the two AC connectors on the AC Switch Block.\n\nA small 5V signal applied to the D0 input will control the switch that turns the AC device on and off. Run a wire from the 0V connector on the AC Switch to the ground of the device providing the 5V signal. Double check that all your connections are correct, and plug in the AC device to the wall - now, a 5V signal on the D0 input turns the device on and a 0V signal turns it off.\n\nApplications\n-Automate Your Household. Many household appliances such as lights, fans, blenders, drills, vacuums, etc. run on AC power. Now you can use the behavior from a Poly Block an Intro Module, or any other device that put out 5V, to control these kinds of devices.