As we know,motor protection is one of the important criteria when we involve for AC motor installation,wiring and termination works.Commonly magnetic contactor,fuse, Molded case circuit breaker (MCCB) and overload relays are used for motor control device of induction motor. In general ideal for motor protection,it have two basic protections always installed for every motor are Over-load protection and Short-circuit protection.For [...]
As we known,the electric motor is the one of important equipment to drive the operation smoothly from beginning to end of product. Electricity cost normally around 60% came from electric motor running.It become more worth if installed motors are oversized,low efficiency,under design,poor maintenance or mismatched. So to know the actual motor performance, we need to determine [...]
When we design or replaced the magnetic contactor for motor starter or for others application,the important point is how to sizing the size of magnetic contactor.This is critical point because if we not sizing properly,it can cause a serious damage and our application maybe failure to perform in perfect condition. This time i want shared [...]
A motor overload relay is an electro-mechanical relay that is operated by heat developed in the relay.When the level of current in a circuit reaches a preset value, the increased temperature opens a set of contacts. Overload relay should install in our motor starter application for extra protection.Overload relay can avoid serious damage for electric [...]
This information is useful for troubleshooting and commisioning.It can tell us about the reliability of electric motor.We can design the area or room with such as good ventilation,enough space for maintenance works and suitable with motor application. This information also can use for safety purpose.we can design the safety working area for that motor and [...]
Have you faced any problem with bearing broken,jammed or stuck for your condenser fan motor?Are you know how to change a bearings unit?It look difficult task but if we have required tools,basic knowledge and passion,I’ve think all of you can do this job. What we need for this job?The important tools is bearing puller set,combination [...]
What is protective device introduction? Electrical distribution systems are often quite complicated. They cannot be absolutely fail-safe. Circuits are subject to destructive overcurrents. Harsh environments, general deterioration, accidental damage or damage from natural causes, excessive expansion or overloading of the electrical distribution system are factors which contribute to the occurrence of such overcurrent.
