Surge Protector
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Surge protectors are devices you can use to safeguard your electronic equipment from power surges. These surges can occur due to various reasons, such as lightning strikes or power line problems. A surge protector works by limiting the voltage supplied to an electric device by either blocking or shorting to ground any unwanted voltages above a safe threshold.
Benefits of Surge Protector
Helps Prevent Electrical Problems
If you're trying to decide if a surge protector is worth it, it's important to understand what a power surge is. A power surge happens when a high amount of energy is passed through to a device or appliance that is higher than the amount of energy that is designated for that electrical system. For example, in a normal home in the United States, the standard electrical voltage is 120 volts. Once the voltage rises passed 120, a surge or spike can happen.
One of the biggest threats of a power surge or spike is the damage to your electrical components. A power surge can burst wires, damage electrical equipment, and even cause a fire. Even if a power surge doesn't completely break your electrical equipment, it can put more strain on your components. Over time, this continuous strain on your electrical system can cause some severe issues.
Protects Your Equipment
Another reason that surge protection is important is because it protects your devices from failure. Lightning strikes are one of the most dangerous causes of power surges in the United States and surge protectors do their best to keep us safe. However, even the best surge protectors won't be able to handle the power of lightning.
A far more common cause of power surges involves using high-power devices like refrigerators and AC units. Given that these systems constantly turn on and off and use varying amounts of power, surges can happen in your electrical system. If a surge protector isn't installed, you could risk losing the equipment you need.
Computers are another common device that are susceptible to power surges. Given their high prices and the amount of power they use, these devices should be a priority for protection. The higher the power of a machine or device, the greater the risk for an electrical disaster. To protect the devices you care about most, investing in surge protection is vital.
Prevents Devastating Fires
The flow of electricity works very similarly to the flow of water through a hose. One end supplies high pressure that flows to the other end with low pressure. The same works in our electrical systems. When one end of the wire has high power, it's transferred to the other end with low power. But, when that power exceeds the maximum threshold, an electrical disaster can occur.
While it might mean a broken refrigerator or another device, electrical disasters can also lead to house fires. When an electrical system can't keep up with the demand of power, it can actually cause a wire to burst into flames. Additionally, the higher the amount of power you have, the more at risk you are of a house fire. So, if you're still considering if a surge protector is worth it, you should consider how important your home is to you. Not only can you risk losing one of your favorite devices, you can risk burning down your home.
Gives You Access to Multiple Plugs
Another great reason to participate in surge protection is that you can gain access to multiple plugs. One of the worst parts about the electrical components in our homes is that most of our wall outlets only come with two plugs. While this helps prevent power surges, it also poses some inconvenience.
The most common surge protectors include power strips, making them a great excuse to take advantage of the multiple plugs when you need them. While you're used to only having two plugs in an outlet, now you might have up to 10! However, it's important to keep an eye on the type of devices you plug into your power strip. Although you should be protected with every plug in use, plugging multiple high-power devices into a single surge protector is not recommended.
While these power strips provide the surge protection qualities you can depend on, you'll also have access to multiple plugs for your favorite devices!
Provides Peace of Mind
One of the most important reasons to purchase surge protectors for your home is the peace of mind that they'll provide. If you're constantly worrying about house fires or power surges, buying surge protectors will allow you to relax, knowing that your home and family are protected. It's easy to get caught up and forget to purchase a surge protector or two, but doing so will allow your family to not worry about these devastating electrical problems. Give your family the protection they need by buying a surge protector today!
Surge protectors employ one of two devices to diffuse the unwanted voltage.
The most common is called a metal oxide varistor (MOV). The MOVs are placed inside the surge protector to "absorb" any excess voltage and then act as a "shunt" resistor to divert the excess current to the ground.
The second device is called a gas discharge arrestor (GDR) that acts similar to an MOV. When the voltage is at a certain level, the makeup of the gas is a poor conductor. When the voltage surges above that level, the electrical power is strong enough to ionize the gas, making it an effective conductor. It passes on current to the ground line until the voltage reaches normal levels, and then becomes a poor conductor again.
Both are equally effective in re-routing the transient voltage away from your computer.

Spring storm season is here, don't wait until it's too late because lightning strikes can devestate electronics without protection from a quick surge.
It's understandable—surge protectors are the sort of tech we don't give much thought to until after we need them. Unfortunately, modern electronics have increasingly sensitive circuitry that can easily be destroyed by even moderate exposure to severe voltage fluctuations. Summer storms bring an increased risk of lightning strikes which can absolutely devastate home electronics.
Online estimates for replacing surge protectors vary anywhere from two to five years on average. However, many surge protectors will continue to function as normal power strips even after they no longer offer protection against power fluctuations, giving users a false sense of security.
A surge protector can be used for any reason that a power strip can be used for. The distinction is that a surge protector will also protect the devices from a flux in electricity. You can find these in residential or commercial applications alike. For high-powered devices like an AC unit or a fridge, you might even use a commercial-grade surge protector in your home.
If you talk to an electrician before renovating your home, they can professionally install different surge protections throughout the house. You can also use surge protectors in your home office. Think about how many sensitive electronics are used: a computer, printer, fax machine, and monitor.
Not only will a surge protector keep these expensive devices alive, but they’ll also allow you to plug in many devices in a small area. You might think these are very similar to power strips, but there are some big differences.

What Electronics Need a Surge Protector?
Any device that plugs into an AC outlet can benefit from a surge protector. The most vulnerable pieces of equipment are those with memory and sensitive electronic circuitry. A surge protector is essential for:
- PCs and computer peripherals such as printers, monitors, and routers
- TVs, DVRs, cable boxes, satellite receivers, sound systems, and other home theater components
- Video game systems
- Lighting, tools, small appliances, and office equipment
Note: If you need to protect a computer, consider an uninterruptible power supply (UPS), which provides surge protection and battery backup to allow a safe power-down in the event of an outage.
How to Tell if a Surge Protector Is Good?
Understanding common specifications and knowing what features to look for can help you choose the best surge protector for your devices:
The joule rating indicates the cumulative amount of energy the device is able to absorb before you need to replace it. In general, the higher the rating, the better and longer the device can protect.
The Underwriters Laboratories Voltage Protection Rating (UL VPR) indicates the surge protector's clamping voltage — the highest voltage the surge protector allows through before restricting additional voltage. The lower the rating, the better the protection. The lowest UL rating for clamping voltage is 330 volts.
The Suppressed Voltage Rating (SVR) is a legacy system of measuring let-through voltage. Although you may see this rating on earlier models, most new surge protectors use the VPR rating.
Response time indicates how fast a surge protector can react. Lower response times are better.
Power filtration is designed to reduce electromagnetic interference (EMI) and radio-frequency interference (RFI) — known as noise — on power lines for better sound and picture quality on entertainment equipment. Units with greater noise reduction in decibels (dB) provide better filtering.
Models with three-line protection protect along hot, neutral and ground wires.
Auto shut-off protects devices connected to a surge protector by turning off the power to them when a catastrophic surge occurs.
A protection indicator light shows the unit is protecting your equipment. If this light is off, it's time to replace the surge protector.
A ground indicator light shows that the surge protector is connected to a properly grounded outlet.
Widely spaced outlets allow you to connect plugs with bulky, built-in transformers.
Rotating outlets pivot to accommodate large plugs without blocking other outlets.
USB (universal serial bus) ports allow you to charge compatible mobile devices.
A built-in circuit breaker stops the flow of electricity when an electrical circuit is overloaded — when the devices attached to the circuit are drawing more electricity than the circuit can handle. This feature isn't related to protecting devices against electrical surges and spikes.
Power strips are usually just an inexpensive way to provide access to more electrical outlets. The nearby wall outlet has two outlets. You've got a computer, a monitor (or two), a printer, a desk lamp, and maybe a couple other related peripherals. There are obviously not enough electrical outlets until – voila! – you add a power strip. Power strips offer convenience, but not much protection. They might feature a circuit breaker, which usually also acts as a master ON/OFF switch.
A surge protector can look much like a power strip, but it adds a true element of protection. It's what stands in the way of a power surge or spike and your laptop. A surge protector actually absorbs this additional current that otherwise might damage or destroy your electronics. This feature is generally how you can tell the difference between a power strip and a surge protector.
Three Rules of Thumb for Choosing Surge Protector
Now that we've established that SPDs should be at the heart of a lightning protection system, it's time to think about how to choose the right surge protection. Easier said than done. Here are some rules of thumb for installing a surge protection device (SPD):
Familiarize yourself with types, or categories, of SPDs.
Assess the risk of lightning strikes and discharge capacities.
Use the right devices to protect the surge protection itself.
To protect a distribution switchboard, you need only install a Type 2 SPD with discharge capacity In>5kA.(8/20).
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Chang Song Electric Co., Ltd. Has successfully developed and producing various categories in industrial electric products which include: Circuit Breakers, Panel Boards, AC contactors, Meters, Relays, Fuses, Control Units… As well as many other electrical accessories such as LED lighting.



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