Author Archives: Atef Silem

CONTROL TRANSFORMER, the majority of industrial motors operate on voltages ranging from 240 to 480 volts. Magnetic control systems, on the other hand, are often powered by 120 volts. To run the control system, a control transformer steps the 240 or 480 volts down to 120 volts. A control transformer is nothing unique, save that […]

Timer delay relays are broadly classified into two types: on-delay relays and off-delay relays. DOE, which stands for “Delay On Energize,” is another name for the on-delay relay. DODE, which stands for “Delay On De-Energize,” is another name for the off-delay relay. Timer relays, like other control relays, employ a coil to regulate the functioning […]

Contactors and relays are electromechanical switches. They use the solenoid concept to work. An electric current is linked to a wire coil. The current’s magnetic field is focused in an iron pole piece. A metal armature is drawn to the electromagnet. The contacts are linked to the metal armature. When the coil is turned on, […]

Overload Relay is not the same as fuses or circuit breakers. Fuses and circuit breakers are used to safeguard a circuit from a direct ground or a short circuit. Overload Relay is used to prevent the motor from overheating. the motor is connected to a circuit that is protected by a 20 amp circuit breaker, […]

Motor control can have several different meanings. motor control  can refer to anything from a simple toggle switch used to turn a motor on or off (Figure 1-1) to a very complicated system used to control many motors, with literally hundreds of sensing devices governing the circuit’s functioning. An industrial electrician should be able to […]