A lightning arrestor acts to reduce a voltage surge due to, for example, a lightning strike on a power line. This will protect the transformer from an over-voltage acting to break down its resistance. A lightning arrestor is connected between each line conductor and earth. Under normal voltage conditions, it acts as an insulator, but when a critical value of over-voltage is reached, it conducts -suppressing the voltage spike.
The conductor for H2 connection on a 480 volt wire transformer should be marked:
If you are outside you should find shelter but otherwise you should be afraid of thunder and lightning like my sister is. P.s. She's six
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Go to a hospital.
Inside.
Usually disconnects are placed around any equipment that you may have to do maintenance on in the future and don't want to have to take larger outages than necessary. If the current transformer is on a substation bus, and you don't want to take an outage to that bus, but would like to take a look at the CT's, you should put disconnects around it to allow such maintenance activities.
why should we use pulse transformer rather than ordinary transformer
If it's a lightning storm, Your laptop is powered by an inline transformer as part of the power cord so, in theory,if lightning hits your house it will destroy the transformer first before hitting your laptop.At the very least, in theory, if you lose power in any storm, a power surge from the power being turned back on hits your transformer and destroys it first and not get as far as the laptop.Either way you can't be hurt from a storm just by using your laptop if your NOT connected to the power cord if your in your house or building.
B.I.L. stands for Basic Impulse Level for the transformer. It should be on the faceplate of the transformer.
A transformer can be used to change the voltage to an appliance. The voltage rating of the transformer should be right for the voltages used, and the current rating of the transformer should not be less than the current drawn by the equipment.
Yes. Yes, you can replace a transformer with one that has a higher current rating. The load on the transformer should be less than 200mA because presumably that is what the circuit was designed for. Since the current through the transformer should be less than 200mA, the 500mA transformer will not be damaged. The opposite is not true. You should not replace a 200mA rated transformer with a 100mA transformer, for example. If the current exceeds 100mA, the transformer could fry.
You should measure the
First isolate the transformer
The conductor for H2 connection on a 480 volt wire transformer should be marked:
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If the number of turns in the primary is the same as the secondary, this would be an isolation transformer. Primary and secondary voltages should match (minus the inherent transformer losses), as should the current.
You should never be in the water because lightning conducts through water.