General Requirement For Motor Starter

20/08/2013 by 4 Comments

When we plan to install new motor starter,we need to consider a few requirement that we want to apply to get a best design,tidy and easy to troubleshooting if have any problem.

Normally motor starter component includes a drive (VFD),electrical wiring,control panel,communication system (Ethernet / Devicenet) and types of starter that we plan to use.

From the design stage,we must follow general requirement for Motor starter to get a best result for our installation.Below I listed some of requirement to build a motor starter.I hope it’s can give a clear view or guide line during design a motor starter. read more

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Electric Motor Maintenance

10/12/2012 by Leave a Comment

As we know,motors is a common used for rotating equipment to make domestic and industrial operation more easier.In general,electric motor is reliable machine with minor maintenance require.But to ensure electric motors have a more life span and service life,we must perform periodical inspection and service and schedule it with proper arrangement.

With periodical inspection and services, we can reduce motor failure and minimize downtime for operation.Record all data and finding during inspection for our referral and also can perform diagnostic report.Normally periodical inspection for motor should be such as motor base condition,shaft alignment,bearing condition,motor temperature and belt tension or coupling position. read more

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DC motor starting

28/10/2011 by 1 Comment

DC motor is the one of common types of motor that used for industrial application.It have more advantage and suitable for more heavy application in industry.

This time i want share some basic information how DC motor starting.It important because from this we can know how to build and setting the controller for DC motor.

As we known,DC motor types such as fractional-horsepower shunt, series, and compound DC motors can be started by connecting the motor directly to DC line voltage. read more

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Electro-Mechanical star delta starter

06/08/2011 by 36 Comments

Star Delta starter is the most widely used application especially for Air-compressor and HVAC system.This starter used for 6 or 12 wire for motor terminal depend on electric motor that chosen for the application.

Basically this starter used 3 unit contactor,1 unit timer delay,1 unit overload relay and start/stop button to control the star delta motor.Around the world,it have many types of control circuit design for star delta.

It have different design and technique  for the control circuit but the main objective is same,to reduce starting inrush current.

For safety condition for the star delta control circuit,it include with interlock for star and delta sequence to avoid serious damage for electric motor.That mean during star sequence,contactor for delta cannot energize or vise versa. read more

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charging methods for UPS batteries

24/06/2011 by 4 Comments

When we used the power from batteries,it will drop and losses the power performance.It must be charging to full back a capacity of batteries.It must be discharged periodically and charged up back to ensure it will supply enough power supply when needed.

Manufacture have a design suitable charging process for their UPS to ensure it can recharged a battery more faster and prolong the life span.If the charger equipment is breakdown,it can cause the power supply shortage due to UPS cannot deliver the voltage. read more

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Auto transformer

23/05/2011 by 2 Comments

This is a one from several types of transformer.It usually used for motor starter,we recognize it by name “auto transformer starter”.Basically design for auto transformer only have a single winding and provided with tap connection for step up or down.

It have magnetic core with single winding which common primary and secondary circuits.The primary connection is connected with main AC power supply and secondary connection is connected with load.

If the primary is the total winding and is connected to a supply and the secondary circuit is connected across only a portion of the winding,It mean this is for stepped down voltage. read more

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Safety interlocking devices

11/05/2011 by 1 Comment

For the electrical power distribution,we used a switch gears to control our distribution power supply to user.One of important things when design the system,we must include with safety interlocking device.

Motor control design also need to attach with interlocking system to ensure the operation is safe for user and can prevent for serious damage of equipment.

Before we design the control circuit or operation sequence,the important aspect that we should consider is about interlocking and must have a deep study to make sure it function properly.

Types of interlocking method

Normally in industry,interlocking devices have a two (2) types of method such as electrical and mechanical control.Their main purposes for interlocking system are  : read more

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