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What is Protection Relay and How Do Protection Relays Work?



For those who not aware, what is protection relay? Simply answer is protection relay is an electrical device which is work as shield guards for electrical power system which is help to protect electrical power system from over voltage, low current & earth fault etc.

Protection relay is electrical device where it receives electrical input and we need to set protection relay device in which form we want output. In protection relay input can be voltage, temperature & resistance. Output can be visual feedback in number of form like indication warning lights, control warning, visual alarm, automatically power turn on & off, an alphanumeric display & communications etc. A following diagram will give you simply answer “what is protection relay”.

Protection relay either can be electromechanical or electronic/microprocessor-based, which have number of advantages for electrical power system like relay showing visual feedback in form of LED light and it also communicate with help of a network or a PLC. The output is used to make control & monitor power system from unbalance or over voltage. Relay continually working to make controlling, monitoring & protect power system.

Protection Relays Work

Protection relay is same like safe jacket, which is save us when we are in bad situation, relay working cycle is also same as life jack for electrical power system.

The purpose of protection relay is to deleting an issueduring its initial stage which can we happen in future. It works on to eliminate that issue or significantly reduce damage to power equipment.

The following stage where relay work on problem or Damage –

Stage 1: During running of electrical equipment, relay going to find first stage of problem or damage like moisture, dry dust, unwanted chemical, persistent overloading & vibration etc. starting monitoring of small problem or damage which can be incurred as a big damage in future. On the time of small problem incurred with equipment so relay is also going to start monitoring & protection work for power system and going to show indicated.

Stage 2:In the second stage damage going to become more severe. Like changes take place such as insulation breakdown, overheating and over current or overvoltage. Since from first stage to second stage change’s become normal changes to abnormal, this goes to create problem in power system. Then protection relay is stared to protect our power equipment from over current or voltage, Overheating etc.

Stage 3: At this stage problem going to create damage in power system, different types of protection relay will help to get protect from damages. Following in list of protection relay –

  • Numerical protection relay.
  • Transformer protection.
  • Differential relay.
  • Over current protection.
  • Substation automation.
  • Motor protection relay.
  • Auxiliary relays.
  • Transformer differential protection.
  • Switchgear protection.
  • Control and relay panel.
  • Feeder protection relay.
  • Self powered relay.
  • Line protection relay.

If we going to change continually circuit breakers, replacing fuses and repairing equipment but we are going to find main reason that creating problem or damage in power equipment then it not going to help us to but relay can work for you to find damage and to make protect from that damage. Read more about protection relays visit here –

A very Passionate and Professional blogger. Writing for Biz 2 Communities.I love to research about technology and share my reviews with community. My goal is to provide articles about technology that definitely blow the minds and keep you update of latest trends and future technologies.

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Four Indian police, two militants killed in Kashmir attack: police



SRINAGAR (Reuters) – Four Indian paramilitary policemen and two militants were killed in a gunbattle that ensued after militants stormed into a police training center in Kashmir on Sunday, a police official said.

At least two militants entered the building at around 2:30 a.m. at Letpora, south of Srinagar, Rajesh Yadhav, a Central Reserve Police Force (CRPF) spokesman told Reuters.


The militants fired indiscriminately and lobbed grenades before heading into the center, Yadhav said.

He said two militants and four police were killed in the gunbattle.

SN Srinvastav, special director general of the CRPF, said that there could be one or more militants still hiding.

“We hope that we will conclude the operation as soon as possible”, he said.

S P Vaid, director general of Jammu and Kashmir police, said that a search operation was going on, adding that they had received tip-offs about an impending militant strike in the Kashmir for the past three days.

“They (militants) were trying. They probably could not get a place and time earlier. So, they struck last night,” Vaid said.

Militants have targeted police camps in Kashmir in recent months. Eight Indian police officials were killed when Jaish-e-Mohammad militants attacked a security camp in southern Kashmir in August.

Indian troops have killed 206 militants this year, Vaid said. Last year’s total was 150.

India accuses Pakistan of training and arming militants and helping them infiltrate across the Line of Control that divides Kashmir. Pakistan denies those allegations.

The South Asian neighbors have fought two of their three wars since independence in 1947 over Muslim-majority Kashmir, which they both claim in full but rule in part.

Writing by Sudarshan Varadhan; Editing by Alison Williams

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New year could bring record low temperatures to U.S. Midwest, East Coast



(Reuters) – Bitterly cold weather will usher in the new year for much of the United States east of the Rocky Mountains this weekend, bringing record low temperatures to the Midwest, making travel difficult and putting a chill on New Year’s Eve celebrations.

The mercury in New York City’s Times Square was expected to drop to about 10 degrees Fahrenheit (minus 12 Celsius) with a wind chill at nearly 0 F (minus 18C) during the final hours of 2017, the National Weather Service said, testing the willpower of hundreds of thousands of New Year’s Eve revelers.

In the heartland, next week could bring low temperatures last recorded 130 years ago to parts of Nebraska, said David Eastlack, a meteorologist with the weather service. That includes a record low for the date of minus 22F (minus 30C) for Tuesday.

“The bitter cold is going to be dangerous,” he said in a phone interview, warning residents of eastern Nebraska and western Iowa to avoid venturing outside or taking a car trip. He said that the wind chills will be near minus 35F (minus 37C), a level when frostbite could set in within 10 minutes.
People cross 6th Avenue and 42nd Street as a cold weather front hits the region, in Manhattan, New York, U.S., December 30, 2017. REUTERS/Eduardo Munoz

The weather service predicted lows would hit minus 20F to minus 30F (minus 7C to -34C) from Montana into the Dakotas and Minnesota, well below average.

Temperatures could drop to around 0 F (minus 18C) as far south as the northern border of Oklahoma on New Year’s Day, and into the minus 30s near the Canadian border on Sunday and Monday, the service said.

The arctic air from Canada will also bring subfreezing temperatures to U.S. Gulf Coast cities such as Biloxi, Mississippi.

 Icy roads will make travel difficult over much of the United States, from the south-central states of Texas and Oklahoma and eastward over Arkansas, northern Louisiana, Mississippi and Alabama through the New Year’s weekend, the private AccuWeather forecasting service said.

Weather was expected to remain much more mild on the West Coast, with temperatures forecast in the low 70s in Los Angeles over the next few days.

Reporting by Bernie Woodall in Fort Lauderdale, Fla., and Dan Whitcomb in Los Angeles; editing by Diane Craft and Jonathan Oatis

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How to Choose the Right Lipstick According to Your Skin



A lot of people choose the right lipstick thinking by randomly going to a mall and selecting a shade the find attractive. Without applying them directly on their lips, they swatch a couple of colors on their wrist and think they find the right match. However, once they get home and apply the lipstick on their lips, the reflection they look in the mirror does not go according to their expectations. This is because the process through which they think they choose the right color is wrong.

Let is examine the right way of finding that one perfect shade according to your skin undertone that you can wear whenever you want. Follow the instructions below step by step.

See Your Skin Tone

The right way to do is to stand in front of a mirror and examine your skin too. Are you fair, light, tan, medium or dark? See if you get sunburn easily or you don’t get a burn at all? Do you get tanned easily or your skin is already tanned? Look for answers to these questions before jumping to the next step.


Once you figure out the outer tone of your body, it is time to examine the undertone. Look for the color of your vein. We humans usually have three types of tones: warm, neutral, and cool. If your veins are blue or purple then you have a cool undertone. If your veins are green in color then your undertone is warm. However, if you can’t decide whether you have blue veins or green then you probably have neutral undertone.

Gold and Silver Jewelry

If you are still not able to figure out what undertone you have, you might as well switch to examining the kind of jewelry that fits best on your skin. Does your skin looks better when you wear a silver jewelry or are you more comfortable with gold? People who can easily sport these two are the ones with neutral undertone. Silver jewelry looks good on cool tone whilst gold on warm.

Everyday Color

Now let’s choose a lipstick for you. The best way is to find a color that is at least two shades darker than your lip color. Apply a lipstick you think is right on your lower lip and compare it with your bare natural upper lip. If you think that there is slightly difference, then you have found the perfect color. However, if there’s a lot of difference then you need more options. All users can get 20% Off on Teleflora Coupon Codes.

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