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.

Your garbage disposal is a lifesaver.  It is a remarkably quick and convenient way to dispose of food waste.  In fact, many garbage disposals can withstand years of daily use without a beat.  But how do you keep the not-so-silent hero of your kitchen healthy?  If properly monitored and maintained, your garbage disposal can dodge the serious problems for years to come.  Continue reading for best practices and tips for extending the life of your garbage disposal.

Run Cold Water During Use

The cool shock from cold water will cause the food that is in your drain to harden.  This is ideal, since hardened food is much easier for your garbage disposal to grind up.  Many people get in the habit of running hot water down their drain, however we advise against using hot water for your garbage disposal as the high temperature can melt your food waste.  Melted food waste will adhere to the pipes of your sink and garbage disposal, which in turn can cause a clog or a more serious issue.

Watch What Goes Down the Drain

Certain materials should never come in contact with your garbage disposal.  Obviously, metals and plastics should be thrown away instead of shredded down the drain.  Many other things should be kept away from your disposal, including fibrous vegetables, bones, oils, and grease.  Here is a list of some of the things that should never be placed in your garbage disposal:

Add Some Citrus

Now, time for something that we encourage putting in your garbage disposal: citrus fruits!  Whenever you peel a lemon, lime, or orange, toss that peel down the drain of your sink and let your garbage disposal work its magic.  The peel will help to eliminate some of the food waste that is stuck to the blades and interior of the garbage disposal.  Additionally, the fresh scent will suppress any odors coming from the garbage disposal.

Occasionally Use Boiling Water

Remember when we said that hot water is not the best option for garbage disposal use?  That remains true.  However, if you are trying to wash away any excess food stuck in your system, a pot of boiling water down the drain once a month will do the job.  Keep in mind, the heat does cause the food that is in your garbage disposal to melt, which can cause clogs.  It is imperative that you do not pour boiling water down your drain more than recommended.

Keep It Running

Many people will shut off the garbage disposal after they hear a change in sound, generally indicating that the food is gone.  This method will leave bits and pieces of your food waste in the disposal, which after time can cause a clog.  To avoid this issue, we recommend running the disposal for an extra two minutes with cool, running water.  This ensures that all pieces of food waste are eliminated down the drain.  As an added aspect of protection, pump a small amount of dish soap into the disposal.  The grease-fighting powers of the dish soap will both clean the disposal and finish the job by sweeping away any stubborn pieces of food waste.

Homeowners are always looking for ways to  lower their energy costs, and we can’t really blame them for wanting to do so. There are so many ways to go about conserving energy – both large and small – and we’re here to help you with some  ideas. It’s important to remember that even small changes can go a long way, so if you’re on a budget, don’t worry. Not every change requires a green gadget or a pocket full of cash. Simply altering a routine can have a serious impact on your annual energy costs.

We know that this can be a daunting process, because the opportunities are endless! This is why we’ve compiled five simple ways to lower energy costs.