There are several different types of medium voltage earthing systems. These systems can be differentiated by using the neutral point connection method. They are different in the way that they operate and each of them has its own pros and cons. These earthing systems in medium voltage include the likes of:

The functioning of each differs from the other. They also have various applications. Let’s have a look at each system at a time:

In this one, there is no electrical connection between the earth and the neutral point except for the devices that are used for measurement or protection. There is high impedance inserted between the earth and the neutral point. There is no switching on occurrence of the first insulation fault. It is therefore important to carry out permanent insulation monitoring, show the first insulation fault and locate and clear the first insulation fault.

Pros and cons: The advantage of using this one is that it provides services by tripping only when the second fault occurs which is subject to the capacity of the network not leading to a high earth fault current which would be dangerous for people when the first fault occurs. It has its demerits. There is the risk of high internal over-voltages. Insulation monitoring is also compulsory as well as the presence of maintenance personnel who will be monitoring and locating the first fault during use.

It is also known as direct earthing. It has a connection between the earth and the neutral point. Upon first insulation fault occurrence compulsory switching must be done. It is significantly different from the above mentioned unearthed neutral.

Pros and cons: This system reduces risk of over-voltage occurring and also authorizes the use of equipment with a normal phase to earth insulating level. On the other hand, there is mandatory tripping upon occurrence of the first fault. The touch voltages developed are very high and this poses a high risk for the personnel while the fault lasts. Differential protection devices must be used so that the clearance time of the fault is as short as possible.

This system requires a resistor to be inserted between the neutral point and the earth. It is also known as limiting resistance earthing. Their operating technique is quite straightforward. Switching must be done upon the occurrence of the first fault.

Bryant Electric Service was recently inundated with calls the morning after a strong wind/thunderstorm blew through Austin.  This happens every time.  Although many calls were customers needing their power restored after tree limbs took down their overhead power line, there were also many calls wanting our service techs to come out to check their whole electrical system because of nearby lightning strikes damaging many of their home appliances and electronic devices.

With the enormous amount of electronics that are now being installed in almost every device that can be plugged into any power or phone/data outlet, it has become evident that having whole house power/data surge protection installed is imperative.

When lightning strikes it creates a huge static electrical field that, like the bolt itself, seeks the easiest path of least resistance to the ground.  The easiest path for this static current is your overhead electrical and phone/cable lines that run up and down your street and all of which connect directly to your house.  When this happens, it destroys the very delicate, low voltage instruments that are now installed in most appliances:  refrigerator, dishwasher, microwave, oven, coffee makers, washer/dryer, A/C and furnace, thermostat, garage door opener, sprinkler system control, etc.  These are all affected by power surges going throughout your electrical wiring system.  Then there are your TVs, computers, modem, hand-held charging devices, VCR, TV signal box, Bluetooth and your telephone, if you still have one, and these are all affected by the power surge through your phone/data cables.

If you are interested in receiving a cost estimate to have this protection installed in your house, please contact us at Bryant Electric Service and one of our dispatchers will be happy to help you.

One of the best ways to relax outdoors is by sitting in your own private hot tub. After a long hard day at work, a soak in the hot tub can help rinse away all the stresses of work and life in general. A hot tub is also a great way to entertain a few friends on the weekend. Once you have picked out the tub that you have been dreaming of, the next step is getting it set up and ready for you to enjoy.

Setup

Although you may be extremely excited to start filling your new toy up with water for that first use, hot tubs require an electrician. Santa Monica homeowners will need an electrician to help wire the hot tub to the home. These wonderful devices are not something you can simply plug into the patio outlet.

The tub or sauna will need to be hard-wired into the home’s power. Typically, because of the electric requirements, a dedicated breaker will be needed. Depending on the available service, you may need an additional breaker installed.

It is not uncommon for permits to be required for the setup and installation of a hot tub. An inspection may also be needed. A qualified professional will need to make sure the hot tub is wired correctly and safely. These are all things that will need to be handled by an electrician. Santa Monica residents can call The Electric Connection to discuss the setup of their new hot tub.

Maintenance

Like anything that is run by electricity, there are times when the unit will fail. Never try and fix the hot tub yourself. In many cases, you could end up voiding your warranty by doing so. If you ever run into trouble with your hot tub, call an electrician to take a look and save yourself time and money from a voided warranty. The Electric Connection is here to help you get your hot tub up and running.

Have you ever thought about what you could do to lend a hand to our shrinking natural resources? Maybe you have cut down the amount of gas you need on a weekly basis or even switched to an electric car. You have probably noticed your pocketbook is a little fatter after cutting down on your gas bill and now that you have a little taste of what it is like to rely on other energy sources you want to learn more ways. Solar power for your home is another way you can save a little money every month while doing something good for the environment. A Pasadena electrician, like those at The Electric Connection, can help you make your home a little greener.

Modern technology has afforded us advancement in solar technology. The panels are much more neighborhood friendly and can be mounted directly on the roof of your home. They won’t take up any space in your yard. The panels are aesthetically appealing and will typically not violate any covenants that may be in your neighborhood. Because of the electrical components involved, a solar power system should only be installed by a certified electrician. Pasadena residents will want their solar power to be safe without worry an appliance will get ruined by a lack of power.

You can choose just how much solar power you want to produce by buying or leasing one or several panels. The amount of electricity you need will depend on how big your home is and how much power you need. You don’t have to worry about “running out” of electricity. When your solar power system is installed, you will still be connected to the main power grid. Your electric company will be your back up electric supply. In fact, if your solar power system produces more electricity than you use, you can typically sell it to your power company. Give The Electric Connection a call today to learn more about solar power and how it can work for you.

Damaged wiring, DIY repairs and faulty installations are all common electrical mistakes which if not corrected in time can be hazardous and lead to short circuits, injury and electrical fires. If you encounter any of these 7 mistakes in your house, fix them immediately as they pose a serious risk to life and property.