UPS batteries charging rates

18/05/2011 by 2 Comments

Basically charging rates for UPS batteries depend on type of batteries cell such as Lead-acid (Pb) or Nickel Cadmium (NiCd).This two types of batteries cell have a different method to charging up.

For Lead-acid (Pb) cells is used a ‘constant voltage’ method.It mean where the current varies as the state of charge changes.Different method for Nickel Cadmium (NiCd) cells,it  is used ‘constant current’ where the cell voltage varies as the state of charge changes.

When we try to charging batteries  from  Lead-acid (Pb) cells type,the basic process are from a constant voltage source the charging current starts high and slowly decreases to a constant value when the cells become fully charged.The constancy of the current is an approximate indication that the cells are fully charged. read more

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UPS battery charger

17/05/2011 by 6 Comments

When indicator for batteries level shown a it  need to recharge,We must charge the batteries to ensure it in full capacity and can operate during power failure.But for UPS batteries charger it typically build in the UPS system.

Now in market,it have several battery charger technology for AC and DC UPS.Basically it similar with car battery charger.The method and technique similar with conventional charger.

Manufacture always improved and made R&D to created battery charger more efficient,safety and durability for user.They design with electronic device for more accurate and faster charging system. The advanced technology usually design for batteries charger included with several items below :- read more

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Vacuum method for air-conditioner

23/04/2011 by 15 Comments

When install new air-conditioner or replaced new compressor or change new expansion valve,we need to evacuation or vacuum process.This is important to ensure no air inside the piping system.For easy understanding,this process is to vacuum the system to take out the air and moisture.

If air remain in the air-conditioner and refrigerant piping,it will affect the compressor performance,reduce the cooling capacity,clogged the cycle of refrigerant and could lead a malfunction.

This procedure very important to make sure air-conditioner running properly and can use for long period without breakdown.All maintenance person or electrical technician must know how to perform evacuation procedure. read more

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How to install 3 phase socket outlet?

18/09/2010 by 5 Comments

Socket outlet is used more widely in the home or industry to connect the electrical power to the equipment or appliances.We can found many types of socket outlet with nominal voltage rated for single and three phase.

Before we install any types of socket outlet,please calculate the full load ampere and make sure the socket outlet rated ampere is suitable with load.If not a socket outlet will burn or broken due to overload current.

This time, I will show how the correct way to install a socket outlet for three phases system.BUT before start any works…MAKE SURE all power supply already switch off or disconnected.Put the signage or tag at the  fuse box for safety purpose.

Socket outlet installation

 

Feel free to watch my VIDEO and drop your comment or any question for further discussion.

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