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What is hidden damage when our utility transformer fed 279 and 138 volts in our home for an extended period instead of 240 and 120 volts?
Wiki User
∙ 14y ago
There may be none, depending on what you have in your home that could be damaged. Generally, this will lower current in 3 phase induction type motors. In most everything else, current draw will go up. Many devices can handle 1.15pu voltage levels, though. Note typical power spikes can be 1.2 pu (120% expected).
Sensitive electronics such as computers, LCDs, etc. could have power supply problems (assuming you don't have some sort of battery backup system protecting them). If you own a computer with a cheap power supply, I wouldn't be suprised if this shows some damage. Damage to the power supply can result in damage to other components in the computer over time. When you buy a bundled computer, the manufacturer often cuts cost as much as possible on the power supply - this is why I recommend buying your own, and buying a good one (if you have the knowhow...). Some LCDs are designed with very low voltage margins - I've seen one where the main power supply capacitors were barely sized to expected voltage input, so the first power surge took them out. Note this would have happened in your case, and would have happened almost immediately.
Generally, I would say equipment that uses a small transformer, and has voltage regulation on the DC side (most electronics) will be fine (no percievable damage in the long run) if you haven't noticed problems already.
Wiki User
∙ 14y ago
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Will using an AC transformer with higher amps damage a kids toy?
Using a transformer with a higher capacity that is needed by the device connected to it will not damage the device. This is as long as the voltage the device needs is the same as the transformers output.
What damage can be caused with 146 vac on a 120 vac household?
If you find a voltage this high on a 120 volt circuit notify your utility company. If you are using a voltage tester of your own, make sure that it is on the proper scale and that the meter is calibrated for zero with no connection. This voltage is too high and could cause damage to devices that are connected to it. It may be a transformer malfunction on the system that feeds your home. Get it looked after right away.
Will a 30 watt transformer damage a device needing only 15 watts?
No, the rating of the transformer, in watts, is the maximum amount of energy that can be safely drawn from the device. Any wattage load up to that limit is safe to connect as long as the voltage is correct to the load.
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What is an item that a damage assessment team and response team (DART) provide?
Investigate the extent of utility and facility damages
Will using an AC transformer with higher amps damage a kids toy?
Using a transformer with a higher capacity that is needed by the device connected to it will not damage the device. This is as long as the voltage the device needs is the same as the transformers output.
Difference between potential transformer and current trasnformer?
The difference between current transformer and potential transformer is that the secondary of a current transformer can not be open circuited while under service whereas that of the potential transformer an be open circuited without any damage to the transformer.
The hurricane caused extensive or extended damage to the city?
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What damage can be caused with 146 vac on a 120 vac household?
If you find a voltage this high on a 120 volt circuit notify your utility company. If you are using a voltage tester of your own, make sure that it is on the proper scale and that the meter is calibrated for zero with no connection. This voltage is too high and could cause damage to devices that are connected to it. It may be a transformer malfunction on the system that feeds your home. Get it looked after right away.
What is an item that a damage assessment team and response team?
Investigate the extent of utility and facility damages
If the frequency is drop What will happens a step up transformer?
If the frequency drops, then overall impedence reduces and hence the current tend to increase, leading to over heating and ultimately may damage the transformer
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A normal car warranty will only cover basic maintenance of the car. Usually just replacement parts and other damage caused by general wear and tear. An Extended Warranty covers other causes of damage, known as third party damage. This includes instances such as Fire, Water and theft.
What kind of extended warranty plans does Ford offer?
There are a few different extended warranty plans that are offered by Ford. There is one that protects people from car breakdowns that are not caused by damage.
