negative sequence voltage relay

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Effective negative sequence voltage relay for High-Risk Applications
Reliable negative sequence voltage relay Designs for Commercial and Industrial Applications
CHINA – ?¡ãAny Electronics?¡À proudly presents their complete variety of negative sequence voltage relay . They provide a full set of negative sequence voltage relay goods and also other interrelated solutions. These units are noticed in unique applications for example commercial applications, industrial handle circuits in addition to OEM Panels. These devices come with fantastic precision and repeatability. The common negative sequence voltage relay which can be designed in recent times require very little panel space.

negative phase sequence voltage relay negative 3 phase sequence voltage relay


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Atashka asked electrical engineering problem?

I am using 9V voltage source, supplying 5V(through voltage regulator) to water sensor, then to bistable multivibrator (active high), which is connected to DPDT relay and then to servo motor. When water sensor is on, motor will rotate in positive direction, when water sensor is off, multivibrator will send logic "0" to relay, which will change the polarity of motor to make it to rotate in negative direction. The question is how can i make motor to rotate for certain amount of time for both cycles. And also can i get a ready multivibrator in electrical shops, because i tried to built it up myself, from circuit i got from internet, it didnt function properly. If u have better suggestions how to implement the task by using some other components also will be very appreciated. Thank you

And got the following answer:

I guess you have a motor that will pump water into a reservoir or tank. When water drops to a certain low level, one would like to start the motor. IS that what you want? What is meant by reversing the motor?? What happens then? If you need the motor to drive for a certain time, you need a timer. This is a device when started, will remain On for a specific duration. So you can trigger the device when water reaches a low level, by sensing the level through the water sensor. Then the motor will rotate for a certain time depending on time you have set in timer. When level falls below the min level, the sequence will repeat. A simple way to get a timer is to use a large RC and a transistor driver for the relay. The capacitor at base can be charged through a diode, when trigger occurs, and the capacitor will keep the transistor ON for a certain time. The transistor can drive the relay. See also timer circuits based on 555.

The negative sequence voltage relay work very properly with diverse applications that are distinct to power distribution and protection. The relays come with wide adjustment ranges with a scale that may be simple to study either in 3 or four digits according to the model. These negative sequence voltage relay aid in rising the flexibility from the applications, cut down the all round energy and upkeep expenses. You will find relays that are used for general purposes which come in reputable styles with speedy replacement possibilities. And you’ll find models which might be made use of for industrial applications and heavier duty applications that operate on massive loads. These solutions are made to meet the lifetime industrial handle demands from the applications.
Their most current merchandise would be the Time counter, Timer Delay, negative sequence voltage relay, Swift Connect Couplings, Electronic Motor Couplings, Aluminum Couplings, Morse Couplings and several other individuals. The internet site gives a detailed description of each and every model in different categories of negative sequence voltage relay couplings and sensors. These solutions are particularly valuable for high-risk applications. The negative sequence voltage relay are also offered with capabilities like a number of timing ranges and functions. The enterprise is presently seeking agents and dealers who can promote and sell their factory created items. They are normally on a lookout for building new and more reputable solutions based on the needs and requirements of your industry.

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