90+ pages how many ohms should a contactor coil have 2.6mb. If you do not get this reading you have a bad coil. The replace was order by PT off the old one. We can use that information to tell that theres corrosion in the coil eating away at the copper giving it a point of high resistance. Check also: many and understand more manual guide in how many ohms should a contactor coil have After disconnecting all wires from the relay ohm the coil between terminals 2 and 5.
The 3 ohm coils because of their lower resistance pass more current and therefore run warmer than the 5 ohm coils. Since the coil should have a very high resistance make sure you are using the proper scale on the ohmmeter.
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This is most likely to occur under worst case conditions such as creeping along in traffic on a hot day in Arizona this isnt so great for an air cooled engine either.
This coil would need to be re-wound to be fixed. You should have an infinite OL resistance to ground. I have the old contactor and it reads about 150 ohms and the replacement is about 350 ohms. This will come specified with each specific relay used along with the tolerance of the coil. You should get a reading between 9-12 ohms although this varies by manufacturer. If it does not the coil needs to be replaced.
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I think my predecessor put a 120v coil contactor in to make it work. If your tests conclude that you dont have an issue with your contactor consider some of the other failure signs listed above. Many times you may suspect a relays coil is bad.
Here is all you need to learn about how many ohms should a contactor coil have This will come specified with each specific relay used along with the tolerance of the coil. The needle bounced all over the place and then settled about. In order to check to see if the relays coil is good or bad one of the best methods is to check its resistance. 300a high voltage dc contactor 12v 24v coil ato contactor wiring guide for 3 phase motor with circuit breaker overload relay nc no switches electrical o electrical circuit diagram circuit diagram circuit the most prehensive guidelines for installation and maintenance of dc contactor high voltage dc contactors ev contactors battery contactors dc contactors manufacturer in china contactor holding circuit with push button switch etechnog on delay timer connection with contactor etechnog cgele 2 pole air conditioner contactor 30 amp 120vac coil condenser contactor pressor contactor ac definite purpose contactor pack of 1 pcs industrial scientific A contactor really has only two basic parts.