0
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?
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.
What else can I help you with?
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.
Can you use a 1000watts transformer with a 700 watts appliance?
Yes, you can use a 1000 watts transformer with a 700 watts appliance. The transformer's capacity should be equal to or greater than the appliance's wattage to prevent overloading or damage. In this case, the 1000 watts transformer has enough capacity to safely power the 700 watts appliance.
Does home insurance cover tornadoes?
Check your policy for the extended coverages of wind and hail storms. If you have it then yes you will be covered for tornado damage.
What happens if you leave the oven on for an extended period of time?
Leaving the oven on for an extended period of time can lead to overheating, potential fire hazards, and damage to the oven itself. It can also result in wasted energy and increased utility bills.
Can you able to use plastic instead of iron core in transformers?
It is because if we use a plastic as a core of the transformer then induced emf can to be produced also generated heat will damage the plastic .
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.
Why is it better to determine the efficiency of the transformer indirectly rather than by loading it?
It is better to determine the efficiency of a transformer indirectly through measurements and calculations because direct loading can cause overheating and damage to the transformer. Indirect methods are safer, more accurate, and do not risk the operational integrity of the transformer.
Can infinite voltage be given at transformer primary?
no, infinite voltage can't be given to the primary of the transformer....if the secondary is connected to the load, then over voltage will damage the load, if secondary is open circuited, then the infinite voltage can breakdown the transformer internal insulation,
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.
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
Why should you not use a transformer made for a clothes dryer for an answerin machine?
A transformer made for a clothes dryer is designed to handle higher power loads, typically 240 volts, which is much higher than what an answering machine requires (usually 120 volts). Using such a transformer can potentially damage the answering machine due to the higher voltage output. It is important to match the transformer's specifications with the device's power requirements to avoid any safety hazards or equipment damage.
