Control Panel Boards
Motor Starters and Motor Controllers The purpose of the motor starter is to protect the engine, personnel and associated equipment. Over 90% of the engines used are AC induction motors and motor starters are used to start and stop it. A more generic term would identify this piece of equipment as a motor controller. A controller may include several functions, such as start, stop, overcurrent protection, overload protection, reverse, and braking. The motor starter is selected to match the voltage and power system. Other factors used to select the starter are: engine speed, torque, full load current (FLC), service factor (SF), and the qualification of time (10 or 20 seconds). DG Synchronizing Panel Understanding the thermal patterns of this equipment is essential for a successful inspection. Also correctly identify the source of the malfunction can make valuable recommendations. The engines can be damaged or significantly reduced life if operated continuously at an intensity of above full load current. The motors are designed to handle inrush or locked rotor currents without much increase in temperature, there is always a limited time and a limited number of starts. Overcurrents up locked rotor current are usually caused by mechanical overload motor. The National Electrical Code (NEC) describes the current protection for this situation as "motor running overcurrent (overload) protection." This can be shortened to overload protection. Over current caused by short circuits or ground faults are much higher than those caused by excessive mechanical stress or boots. The NEC describes this type of overcurrent protection as "short circuit and ground fault protection of motor branch circuit." This can be shortened to overcurrent protection. The four common types of motor starters are through the line, the starter reversing starter with multiple speeds, and the starter motor reduced voltage. Motor starters are generally comprised of the same types of components. These include a disconnect switch or fuse, contactor and overload. There may also be additional components, including control circuitry and a transformer. Understanding the thermal patterns of this equipment is essential for a successful inspection. Also correctly identify the source of the malfunction can make valuable recommendations. Automatic Power Factor Correction Panel (APFC Panel) Over current protection
NEC requires over current protection and disconnecting means for the motor and the drive line voltage. Fused disconnects or thermal magnetic circuit breakers are typically used for over current protection and to provide for circuit disconnection. A circuit breaker is defined by NEMA as a device designed to open and close a circuit by non-automatic means and to open the circuit automatically on a predetermined over current without injury to itself when properly applied within its rating. If we look at a section of a switch, we can identify the possible connection problems. Shiv Electromac are the manufacturer and supplier of Motor Control Center Panel and Electrical Bus Duct Based at Ahmedabad