What is HI-POT tester? When we need to evaluate 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 [...]
Star Delta completed wiring diagram 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 [...]
How to protect equipment from surge voltage? Each year many electrical equipments defected due to surge voltage from natural disaster like lightning or supply error.It very costly to replaced it back to normal system. Theoretically single lightning strike produce 20,000 to 40,000 Ampere and about 200 Mega volts (MV) .It enough to generated a temperature [...]
What is surge voltage? For our easy understanding,electrical surge is a sudden high pick out of voltage value in the system.It can happened in electrical power distribution and communications lines entering homes,factory, offices, and other facilities. The surges voltage happened due to natural factor such as lighting or human error.It can effected and can cause [...]
DC motor starting information. 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 [...]
Motor protection is the one of important criteria that we must consider when design the application to avoid serious damage or injury. Normally we used thermal overload relay to protect electric motor from overload current problem.But if we used soft starter to driven our motor application,the suitable types of protection is using the motor thermal [...]
As we know,Molded Case Circuit Breaker main function is protection device from overload current and short circuit.It also have a several attachment device for additional protection that we can combine with MCCB. Common accessories used for MCCB such as phase insulation barrier,Shunt trip,Under voltage trip device,rotary handle and change over system.It can provide more protection [...]
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 [...]
