Wednesday, December 22, 2010

Article for All Industrial Supply

Our staff has over 100 years of experience in the Electrical Distribution and Automation Industry. We carry a full line of electrical products including all fittings, wire, circuit breakers of all brands, safety switches through 1200 amps, fuses, contactors and starters, lamps, and the list goes on.

We are located right off of hwy 101 and have plenty of parking for our customers. Please feel free to give us a call or just stop by to see what we have to offer. You will be impressed with not only our service but our tremendous inventory.

In All industrial supply , a switch is an electrical component that can break an electrical circuit, interrupting the current or diverting it from one conductor to another.[1][2] The most familiar form of switch is a manually operated electromechanical device with one or more sets of electrical contacts. Each set of contacts can be in one of two states: either 'closed' meaning the contacts are touching and electricity can flow between them, or 'open', meaning the contacts are separated and no conducting.
A switch may be directly manipulated by a human as a control signal to a system, such as a computer keyboard button, or to control power flow in a circuit, such as a light switch. Automatically-operated switches can be used to control the motions of machines, for example, to indicate that a garage door has reached its full open position or that a machine tool is in a position to accept another work piece. Switches may be operated by process variables such as pressure, temperature, flow, current, voltage, and force, acting as sensors in a process and used to automatically control a system. For example, a thermostat is a temperature-operated switch used to control a heating process. A switch that is operated by another electrical circuit is called a relay. Large switches may be remotely operated by a motor drive mechanism. Some switches are used to isolate electric power from a system, providing a visible point of isolation that can be pad-locked if necessary to prevent accidental operation of a machine during maintenance, or to prevent electric shock
electronics engineering, an ideal switch describes a switch that:
  • has no current limit during its ON state
  • has infinite resistance during its OFF state
  • has no voltage drop across the switch during its ON state
  • has no voltage limit during its OFF state
  • has zero rise time and fall time during state changes
  • switches only once without "bouncing" between on and off positions
Practical switches have loss and limitations. The ideal switch is often used in circuit analysis as it greatly simplifies the system of equations to be solved, however this can lead to a less accurate solution.

A contactor is an electrically controlled switch used for switching a power circuit, similar to 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 capacities and features. Unlike a circuit breaker, a contactor is not intended to interrupt a short circuit current.
Contactors range from those having a breaking current of several amps and 24 V DC to thousands of amps and many kilovolts. The physical size of contactors ranges from a device small enough to pick up with one hand, to large devices approximately a meter (yard) on a side.

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