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Contactor print that page


A contactor is an electrically controlled switch used for switching a power circuit, similar to a relay except with higher current ratings. [ 1 ] A contactor is controlled by a circuit which has a much lower power level than the switched circuit. Contactors come in many forms with varying

Rotating biological contactor print that page

A rotating biological contactor or RBC is a biological treatment process used in the treatment of wastewater following primary treatment . [ 1 ] [ 2 ] [ 3 ] [ 4 ] [ 5 ] The primary treatment process removes the grit and other solids through a screening process followed by a period of | 2011/3/10 16:36:05

Motor controller print that page


as in small appliances or power tools. The switch may be manually operated or may be a relay or contactor connected to some form of sensor to automatically start and stop the motor. The switch may have several positions to select different connections of the motor. This may allow reduced

Electrodynamic tether print that page


As part of a tether propulsion system, crafts can use long, strong conductors (though not all tethers are conductive) to change the orbits of spacecraft . It has the potential to make space travel significantly cheaper. It is a simplified, very low-budget magnetic sail . It can be used either

Shihlin Electric print that page

Shihlin Electric was founded in 1955. The company is listed on the Taiwan Stock Exchange (TSE 1503), and Mitsubishi Electric (Japan) is a 20% share holder. Shihlin Electric, in Q1 2009, lists 15 sales subsidiaries and over 100 distribution partners worldwide. Additionally, Shihlin Electric | 2010/9/26 6:07:37

Relay print that page


relay that can handle the high power required to directly control an electric motor is called a contactor . Solid-state relays control power circuits with no moving parts , instead using a semiconductor device to perform switching. Relays with calibrated operating characteristics and sometimes

Direct on line starter print that page


Smaller sizes of direct on-line starters are manually operated; larger sizes use an electromechanical contactor ( relay ) to switch the motor circuit. Solid-state direct on line starters also exist. A direct on line starter can be used if the high inrush current of the motor does not cause

Brushed DC electric motor print that page


A brushed DC motor is an internally commutated electric motor designed to be run from a direct current power source. Contents 1 Simple two-pole DC motor 2 The commutating plane 2.1 Compensation for stator field distortion 3 Motor design variations 3.1 DC motors 3.2

Motor soft starter print that page


A motor soft starter is a device used with AC electric motors to temporarily reduce the load and torque in the powertrain of the motor during startup. This reduces the mechanical stress on the motor and shaft, as well as the electrodynamic stresses on the attached power cables and electrical

Tram controls print that page


The following article describes the controls on electric, rather than steam trams . Contents 1 Overview 2 Power supply switches 3 Lighting and pole circuit switches 4 The "Key" - for forward and reverse operation 5 The "Handle" - for power application 6 PCC type controllers