As we know about circuit breaker is to protect electrical equipment from abnormal condition such as over load current or short circuit.For Low voltage circuit breaker,i already explain on my last post.Please read my post about miniature circuit breaker (MCB),molded case circuit breaker (MCCB) and residual current circuit breaker (RCCB) for more detail information. For [...]
When we need to evaluate the motor condition,HI-POT tester or High Potential tester is the common equipment are used.As we know,a multimeter or ohm meter reading only can determine if a motor winding is open or shorted but cannot checked winding insulation condition if shorted with ground or phase. The main purpose of the Hi [...]
The most active post in Electrical Engineering Centre blog is Star delta starter and Star Delta motor connection.I received many comments and request for Star Delta circuit diagram. So this time i want share my simple star delta circuit diagram completed with power and control line circuit.I hope it can be as basic reference for [...]
Why current rating value is so important for cable/wire sizing?This time i want share some information about cable rating.It look like simple value but it give the big impact when we not do the proper sizing to the cable for our application. If during cable sizing calculation not done in proper way,it can cause a [...]
A new terminology for electrical currents now include all faults those between live conductors as well as earth or grounding faults. If we not design our circuit protection properly followed standard guide,it can cause serious injury or death for human and equipment damage. Fault current be determined at every relevant point. For small and medium [...]
Relay manufactures design them for special applications to full fill industries needed and coupe with advanced technologies. This time i want share information about relays characteristics most often used in typical automation and instrumentation work. As i explained in my last posted,basically principal for small DC and AC relays,sensitive relays, miniature and sealed relays, and [...]
In automation industries,relay is a common device used for control application.Basic operation of electrical relay is a device that changes the state of a circuit in response to it being energized or de-energized by that or another circuit. It function to open or close the circuit or contact and respond depend on signal that we [...]
