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you need a very fancy ohm meter
if you dont have lotsa $ perhaps an ammeter a voltmeter and a variable current source would give reliable answers
maybe a megger since the ohm scale is 6v and the megohm scales use 2500V 1000V 500Vbut this is a lott poorer answer since 1000 ohms is 0 on the megohm
gigohm or 100gigohm scale
maybe a hipot tester depending on the low voltage and current settings
this is very effective with mov's since they are usually concerned with higher voltages
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∙ 13y ago
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What is the circuit diagram on how to convert galvanomeer into ohmeter?
Just connect a resistor and a small battery in series with the galvanometer,change the markings on the meter's scale, and you have an ohmmeter.
What is difference between high impedance busbar protection scheme and low impedance busbar protection scheme?
high impedance circit provides a varistor unit which has stabilising resistor which ll protect the relay from being operating for maloperations like through fault, CT faults whereas this varistor unit is provided internally in an numerical relay where the CT of class 5P can be used.
What is a VDR resistor?
VDR means Voltage Dependent Resistor, which is also called varistor. Varistor is a resistance device with non-linear volt-ampere characteristics. It is mainly used to clamp voltage when the circuit is subjected to overvoltage and absorb excess current to protect sensitive devices. Because it has the advantages of high surge withstand, large current processing and high volume absorption, fast response time and low leakage current, it is widely used in power systems, surge suppressors, motor protection, automotive electronic systems, household appliances, etc. We're JYH HSU(JEC) Electronics Ltd (or Dongguan Zhixu Electronic Co., Ltd.), an electronic components manufacturer. You may google search "JYH HSU" to find our official website.
How do you identify primary and secondary winding without using an ohmmeter?
use the charlie crabtree, simple really. attach the charlie crabtree to the charlie crabtree then simple turn the crabtree to the ohmeter and viola you have charlie crabtreeAnswerIf you are able to see the conductors, then the higher-voltage windings will be thinner than the lower-voltage windings.The terms, 'primary' and 'secondary' have nothing whatsoever to do with the voltage-ratings of the windings. The primary winding is the winding connected to the supply, and the secondary winding is the winding connected to the load.
How do you check a transformer for ac house unit?
Check that the input and output voltages are as required. Check that the transformer is big enough for the current required for the unit you have.
How do you check a cable to see if it is grounded electrically?
First check and see if there's any voltage on the cable by using a voltmeter and then use an ohmeter to check for resistance to ground.
Did varistor having polarity how you will place the component and how you will check the component status?
Varistors are not polarity sensitive. Now I'm pretty sure that the device in question is a varistor. I googled for SAS-820KD05, found several references but unfortunately no data sheet - maybe you have more luck. One main criterium for selecting a varistor is the varistor voltage - as long as the voltage applied to the varistor is below the varistor voltage, it will behave like a capacitor. When the voltage is above, e.g. caused by a transient, it acts as a resistor, shorting this transient. Another important value is the max. pulse current a varistor can withstand.
How you determine correct size varistor for protect system which work with 220v AC?
You use varistor wich has the max voltage for that aplication example:vacuumcleanermax allowed voltage is 240v ac so you chose aprox. 250 V varistor.
How did the word transistor originate?
transient varistor
How do you determine correct size varistor for protect system which work with 220 v?
How i determine correct size varistor for protect system which work with 220 v AC?
How do you find Omh's?
Resistance is measured in Ohms with an ohmeter.
What is the use of metal oxide varistor disc in Lightning arrestor?
I think your answer is given in previous question -( correct size of varistor across 24v coil) I am just pasting the same here. . . "When the voltage exceeds the clamping voltage of the varistor, it conducts current, preventing the voltage from reaching a dangerous level. If the elevated voltage is maintained for too long a time, the varistor will heat to a point where the metals in it melt and fuse together, causing a short. This also poses the posibility of a fire risk, as the current is now conducting heavily through the varistor. This is what often happens to a varistor in a power strip when lightening strikes nearby. It renders the power strip useless. But the connected devices are usually spared. "
How do you install a metal oxide varistor?
A varistor is installed onto the "line" and "Neutral" wires of an AC power input.Added:Maybe this will help you more: cf. Related links, just below this answer page.
How can you do the polarity test of a switch?
A 'polarity test', as it applies to a switch, is performed to confirm that the switch is located in the line conductor and not in the neutral conductor.
How do you determine correct size varistor on a 24vac coil?
is this coil a single shot solenoid or is it used as a filter i assume you want to know a good value for a varistor to stop voltage spikes from the reverse EMF which is aprox. 4X the input voltage. so i would say to use 2X-3X the input Voltage so 48 or 72 Volt MOV (Metal oxide varistor) You want the varistor to be several volts greater than the peak voltage of the signal across which it is connected. 24 volts is probably the RMS value of the coils voltage. Your varistor must be selected to be greater than the peak voltage. When the voltage exceeds the clamping voltage of the varistor, it conducts current, preventing the voltage from reaching a dangerous level. If the elevated voltage is maintained for too long a time, the varistor will heat to a point where the metals in it melt and fuse together, causing a short. This also poses the posibility of a fire risk, as the current is now conducting heavily through the varistor. This is what often happens to a varistor in a power strip when lightening strikes nearby. It renders the power strip useless. But the connected devices are usually spared.
How to interpret the varistor code?
Pl. see http://www.worldproducts.com/MOVDefinitions.htm
Why does speed Ohmeter not work on 03' Cadillac Escalade?
because it is broken
