You may find the main reasons of electrical safety concern are mentioned as below:-

i) LIFE IN DANGER - we must avoid any electric shock which make us uncomfortable whole day. More seriously, it may bring fatality with direct contact on exceeding 30mA current when time prolongs.

Basic Solution: use Residual Current Device (RCD) to cut off the current leakage promptly.

Figure 1: Residual Current Device (RCD)

In the market, you can search many forms of RCDs as displayed as above. The useful data is as follows:

1) In : 40 Amperes (Normal current),

2) I∆n : 0.03A or 30mA (Operating current),

3) Un : 240V~ (System Voltage),

4) 50Hz (System frequency).

5) 2 poles ( two upper terminals & two lower terminals)

Now, we will move to the next safety reason:-

ii) PROPERTY DAMAGES - we must prevent any fire on the building and equipment which cause from overheating.

Basic Solution: use Circuit Breaker (CB) to isolate the overcurrent effectively.

Figure 2: Moulded Case Circuit Breaker

1) In : 60 Amperes (Normal current),

2) Un : 415V~ (System Voltage),

3) 50Hz (System frequency).

4) 3 poles ( three upper terminals & three lower terminals)

iii) LOSS OF PRODUCTION – we must avoid the nuisance trip on the electric machines to ensure continuous operation without disturbance.

Basic Solution: select the proper rating and setting of Circuit Breaker or RCD.

All electrical equipments are manufactured and governed in compliance to the local legislation and electrical ordinance which make sure all manufacturers meet their standard.

The selection of RCD and CB will be discussed in detail later on.

• Do you want to lower your electricity bills?
• Do you want to contribute to preserving the environment?
• Do you want easy replacement of your lights?
• Do you want longer life for your lights?
• Do you want reduced glare in your lighting?

If you answered ‘Yes’ to any of the above, then Energy Savers are for you!

You may try this simple test. Compare two lamps that emit the same amount of light but different amounts of energy (wattage) over the long term of 1,000 hours for each. This cost takes into account the purchase price of the lamp, the cost to operate it, and how long it lasts. If the light you are considering as a replacement gives a lower cost per 1,000 hours, then it’s “enough” to save you money, no matter how much greater its purchase price may be.

Same shine, less wattage
Energy savers save you energy costs while offering similar light output as higher wattage incandescent bulbs. You use less electricity and pay up to 80% less to illuminate your area. Now that is smart saving!

Easy change
Energy savers come in three types E27 (screw type), B22 (pin type) and E14 (small screw type) that fit most conventional fixtures, ensuring hassle-free replacement of bulbs. Energy savers give out less heat making them safer even as bare bulbs, and allowing quicker changing.

Green Lanterns
By reducing demand for electricity, energy savers help preserve the earth’s resources and reduce harmful environmental emissions.

Longer Life
In addition to being flicker free, energy savers come with a minimum of up to 6000 hours lamp life or 3 years regular usage.

Quality
All energy saving products come with an impressive record of quality.

We can have visual inspection on how many wires of the electric system.

“3 wires” mean 240 volts. The wires is a combination of 1 no. of phase wire, 1 no of neutral wire and 1 no of earth wire. Sometimes, we may call it “single phase”.

“5 wires” are 415 volts. The wires is a combination of 3 nos. of phase wires, 1 no of neutral and 1 no. earth wire.

After the visual inspection, we will use the multimeter to measure the voltage. Switch the multimeter to voltmeter. See the photo, the red circle is voltmeter. Then, put the tip of the red probe and black probe across on two (2) wire terminals. You will read the output in volts.

In conclusion, you have learnt the low voltage system for residential housing, 415/240 volts are common voltage levels, conduct visual inspection and use the voltmeter for measurement.

Look at the picture shown. You can get the useful data on nameplate.

Do you note the RED circle? We calls it Current (amperes) and Voltage (Volt).

Use this formula,

Power = Current X Voltage

Power = 40 x 120

= 4800 Watt.

This is simple calculation done in couple second. Once you master it, you can start to compare the air conditioning you wish to buy.

It’s good thing to use the energy saving appliances that will bring lower power consumption and protect our Earth.

Secondly, we can reduce the frequent use with little adjustment on collecting clothes with full load wash.

Thirdly, the life of appliances will prolong if second habit is maintained.

Here are some examples of wise habit of saving our bill.

1) Air Conditioner

Don’t: Use 1 hp air conditioner with a load rating of 950W.

Do : Select 1 hp air conditioner with a load rating of 850W.

2) Washing machine

Don’t: Daily wash is done on partial load wash is $0.18 x 7 = $1.26

Do : Washing three (3) times of full load wash per week is $0.18 x 3 = $0.54

3) Refrigerator

Don’t: Set the temperature of the refriegerator on -21^◦C.

Do : Adjust the temperature of the refrigerator to -18^◦C.

4) Television

Don’t: Standby mode will consume our bill.

Do : Switch off power supply of TV after use.

5) Lighting

Don’t: Use 60W bulb

Do : Replace with Energy Saving bulb

I wish the above will give you tips for energy efficient and saving. Have a nice day!

]]> http://www.chriscl.com/electricalguide/energy-saving/tips-to-lightening-our-energy-bill/feed/ http://www.chriscl.com/electricalguide/electrical-safety/why-my-extension-socket-outlet-was-blown-out-and-the-circuit-breaker-tripped-off/ http://www.chriscl.com/electricalguide/electrical-safety/why-my-extension-socket-outlet-was-blown-out-and-the-circuit-breaker-tripped-off/#comments Sat, 31 May 2008 14:00:01 +0000 admin http://chriscl.com/electricalguide/?p=28 My colleague raised this question to me last week. She said, “I connect all electric kettle, rice cooker and washing machine together. The power was off immediately when I switched on the electric appliances.” She continued, “A burnt smell and brown mark could be seen on the extension socket.” Luckily, the electric appliance was not damaged and no injured to people. However, she got to buy new extension cable.

Does above problem sound familiar to you? This symptom is called OVERLOAD in electric circuit.

Secret of OVERLOAD revealed here.

Each circuit has the maximum capacity of the current carrying to the electric appliance. In simple word, too many electrical appliances connected to a socket outlet will cause this overload problem.

Perhaps you will trip and black out your house and can be reset. If it doesn’t trip and overloading prolongs unknowingly, the insulation of cables will deteriorate and conductors produce losses in heat. It may cause fire too. This considers unsafe act and energy waste.

In my opinion, the electric appliance can be classified to Heavy Load and Light Load.

For examples:

1) Heavy Load

Air conditioning, water heater, electric stove, discharged lamp, washine machine, refrigerator, monitor, television, high power amplier.

2) Light Load

Fluorescent lamp, bulb, table fan, computer, radio, dvd\ vcd\ cd player, handphone charger.

Solution to avoid OVERLOAD

1) Always apply one electric appliance to one socket outlet if possible. However, 3 nos of light load can be add up to one socket outlet.

2) Take advice from competent electrician if you wish to extend more appliances. Perhaps, this requires additional consumer distribution board for long term usage.

3) For temporary usage, I also recommend you to check the loading calculation with electrician.

In conclusion, we shall always consider minimum loading of each socket outlet for safety purpose and fully occupied energy and material usage.

Have you registered for the Expo & Forum?

You are invited to visit the expo for the latest technology and solutions in the electrical and power industry at Kuala Lumpur Convention Centre on 17-20 June 2008.

Here is the highlights:

• Over 200 exhibitors from 18 countries
• Latest technology & solutions on electrical generation, transmission, distribution & supply
• Free Technology Symposium
• 2nd National Energy Symposium
• International Conference on Reducing Carbon Emission in Power Plants
• Meet & Network with 10,000 industry players

So, why wait here? Take action to register online today is required, Click here.

Dearest friend,

Wow, this is really excited news that our life make easier with this intelligent motor starter.

Efficiency: Power losses during normal operation are reduced by 90% or more; it saved & green.

Capacity: PST/PSTB Softstarters are available for operating voltages from 208 to 690 V AC and full load line currets from 30 to 1050 Amps.

Compatibility: allow connection to any existing protocol

With all these features, I  believe  this  motor starter  will  serve us  better. 

If you are changing new tyre, then please take a look at this video. Don’t miss this important message!