volt sensing relay

ANY Timer Rrelay
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Effective volt sensing relay for High-Risk Applications
Reliable volt sensing relay Styles for Commercial and Industrial Applications
CHINA – ?¡ãAny Electronics?¡À proudly presents their complete range of volt sensing relay . They provide a total set of volt sensing relay products as well as other interrelated goods. These units are seen in distinctive applications which include commercial applications, industrial handle circuits and OEM Panels. These devices include great precision and repeatability. The normal volt sensing relay which are developed as of late demand really tiny panel space.

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Amico DC 12V Photoelectric Switch Sensor Relay Module 50mmx25mm w 2 Cable

  • Product Name : Photoelectric Switch Sensor Relay Module;Mode : Light Actuation Mode;Working Voltage : DC 12V
  • Relay Loading Voltage : AC 250V 10A,DC30 V 10A;PCB Board Size : 50 x 25mm/ 2" x 0.98" (L*W)
  • Sesor Size : 60 x 20.5mm/ 2.4" x 0.8" (L*W);Cable Size : 50cm/ 20"
  • Mounting Hole Size : 3mm/ 0.12";Material : Electronic Components, Plastic
  • Net Weight : 17g;Package Content : 1 x Photoelectric Switch Sensor Relay Module

  • Indicator light: one green for switch, red one for power. Built in a potentiometer for sensitivity control. The module with Photoelectric Switch Sensor Relay Module, can be use in street lamp ,automation equipment, detecting the brightness, etc.


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Price: $8.31


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Wazit asked Dose anyone out there know of any other way to reverse polarity other than using a switch?

It has been 20 some years sense I had any electrical theory. My question refers in part as what happens when an alternator is turned in the reverse direction? And what if an induction coil is wound in a different direction? I am trying to make a solenoid that has a PM in it. I want to actuate it in both directions, supplying force to both. Thanks for your input.

And got the following answer:

What you are describing is a type of electro-mechanical linear actuator. You can use a loudspeaker to demonstrate the concept - it has a solenoidal coil that moves axially relative to a cylindrical magnet that produces a radial magnet field. The radial field is perpendicular to the electric current in the coil, causing a force perpendicular to both, i.e. in and out along the longitudinal axis of the coil and magnet. If you apply a DC voltage to a low-frequency speaker, i.e. a woofer, you can see the cone move in or out depending on the polarity of the voltage applied. Try it with a six-volt battery. To answer your specific questions: - when an alternator is turned in the reverse direction it produces the same AC output, except the phases are reversed. In a single-phase alternator there is no effective difference unless you track to phase relative to an independent reference. In a three-phase alternator the relative phase timings are reversed so if you are driving a 3-phase electric motor, for example, it will turn in the opposite direction. - if an induction coil is wound in the opposite direction, the polarity of the voltage it produces will be reversed. Edit: I forgot to answer your first question: how to reverse polarity other than using a switch? You have some choices: - discrete switching (ON or OFF) using mechanical contacts (such as switches or electromechanical relays) or electronic switches (such as transistors). Polarity is changed by switching the desired voltages in and out of the circuit or by routing the current flow. - pulse width modulation (PWM) where an electronic switch consisting of transistors, typically connected as an H-bridge, rapidly switches between positive and negative voltage sources. By varying the relative amount of time in each polarity, smooth bipolar control can be achieved with a minumum of wasted power. - continuously variable voltage (both + and -) using a potentiometer (bad idea for anything except tiny currents) or with a control voltage and a linear power-amplifier. The latter provides excellent performance at the cost of wasting roughly 50% of the available power as heat. P.S.. many linear actuators are actually closed-loop servomechanisms where a position sensor continually measures the position of the output, comparing the actual position with the set position, producing an error signal (negative feedback) that serves to correct the output position in spite of the non-linearity of the actuator's response. A loudspeaker is an example of an open-loop linear actuator. Its output is not corrected during operation - instead it is carefully designed and constructed to provide an approximately linear response over a limited set of operating conditions.

The volt sensing relay operate extremely properly with diverse applications which might be distinct to power distribution and protection. The relays include wide adjustment ranges having a scale that is definitely simple to study either in three or four digits in line with the model. These volt sensing relay support in increasing the flexibility with the applications, cut down the general energy and upkeep fees. There are actually relays that are employed for basic purposes which come in reliable designs with swift replacement choices. And you can find models which are used for industrial applications and heavier duty applications that perform on massive loads. These goods are produced to meet the lifetime industrial handle requirements from the applications.
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