Is a current relay same as potential relay?
current relay are using for over current low state & high state.but potential relay are related to voltage.
I think what you mean to ask is; "The difference between a current sensing, and potential sensing relay. I've never heard of a potential relay. Relays are "pulled in" by applying voltage to the coil, typically 120Vac, or 24Vdc. A current sensing relay will close its contacts when it is wired to sense a particular amount of current. Instead of applying voltage (turning on) the relay, it closes contacts when current flows through it. HVAC… Read More
instantaneous relay is same as the over current relay, but the current is go high beyond the limit suddenly the relay act in micro seconds and disconnect the supply. Read More
As long as the amperage stays the same, the force in the relay stays the same regardless of direction of the current. Read More
If the potential increase and resitance remain the same ,the current will encrease Read More
If both terminals had the same potential there would be no current flow. Read More
Both Current and Potential Transformers are used for relays according to the working of relay. Read More
No, they are not the same. A resistor is a current reducer and a relay is essentially a switch (using low voltage to switch high voltage on/off) Read More
Current arises when "compressed" charges (high potential) expand into lower "pressure" areas (low potential). Wind is much the same. Read More
earth fault relay is also a type of over current relay but the set value of current or relay sensing current is much less than the maximum load current.in over current relay relay sensing current ise than maximum load current mor Read More
The voltage for a potential relay will depend on the circuit that the relay is installed in. The relay can be made for low voltages (5v) to higher voltages (440.) Read More
For series circuits, Current flowing in all components(in series) is same but potential difference across those components is directly proportional to their resistance. For parallel circuits, Potential difference across all components(in parallel) is same but current flowing is inversely proportional to their resistance. Read More
Directional relay is that relay which operate in the direction of the fault current. SAPTARSHI BHOWMICK Read More
No, whenever electricity flows from one point in a circuit to another, it must be either an alternating current (AC) or a direct current (DC). For a current to be able to flow between two points that are connected together in a circuit, there must be a potential difference (voltage) between the two points. If two points in a circuit are connected together but they each have exactly the same electrical potential, then there is… Read More
See voltage means potential difference. Electrons move from higher potential to lower potential always. In wire same thing happens. So electrons flow because there is potential difference and flow of electrons causes current to flow. current is nothing but flow of electrons. reply if u r satisfied @ email@example.com Read More
CT (Current Transformer ) is essential whether is electronic relay or electromagnetic relay. A relay requires the CT to sense the line current. Read More
Current defined as Positive charge flow , flows from higher potential to the lower. Current defined as electron flow, flows from lower potential to higher. In general Potential and Current are defined by positive charge. Read More
In a conventional current, the electric field points the way decreasing electric potential goes. The current from the positive terminal is at a higher potential toward the negative terminal, which means the current is in the direction of decreasing potential. Read More
An over current relay will operate when current exceeds its design rating. This application is intended protect loads or circuits from excessive current. Read More
A relay is a device that uses a small control current to switch a larger current. So the horn button (small current) turns on the relay which in turn energizes the horn (heavy current device). Read More
No. Current flows from a high potential to a low potential. 'Voltage' means 'potential difference', not 'potential'. Read More
Can a numerical relay give protevtion to over current over voltage and short circuit current at the same time?
Yes. Most microprocessor based relays that have both voltage and current inputs can provide overcurrent and over voltage protection simultaneously. Short circuit current is the same as overcurrent. Read More
Potential or voltage relay is used for assisting the motor to start. Its operation is based on the increase in back-electro-motive force (back-EMF). Read More
Follow the schematic of the relay. A relay is simply an electrical switch that is operated by an electric current. When current is present at the relay coil, the relay toggles the switch. If you do not know how to read the schematic of a relay, you probably shouldn't be messing with it. Read More
over current protection relay Read More
think of potential as pressure and current as flow. you can have pressure in a water hose with out flow. open the valve and current happens. The difference in potential divided by the impedance is equal the current. Read More
Voltage is the potential difference between positive and negative. Example (river) the potential difference between the top(mountains) and bottom(ocean) allows for current to flow the same goes for electricity Read More
Electrical conductance is the reciprocal of electrical resistance. From Ohm's law the resistance is defined as the ratio of the potential difference to the current produced by it in the conductor.resistance =potential difference /current.conductance = current / potential difference. Conductance of a material gives an idea of how easily it will conduct current. Silver has more conductance than aluminum or iron. Silver will have more current than aluminum or iron when connected to the same… Read More
Common wire of the potential relay goes to the compressor contactor. (5) Start wire of the potential relay goes to compressor run capacitor. (2) Run wire of the potential relay goes to the start capacitor. (1) Read More
Ohm's Law: E = I*R : Voltage (or Potential Difference) = Current times Resistance. So Resistance = (Potential Difference) / Current Read More
In series circuits current will be the same through out the circuit. So whereever we connect the ammeter the same current is registered. But in parallel circuit current will be different in different lines. In parallel circuits the potential difference will be the same but in series pd will be different. Read More
Is the potential difference across an electric circuit with no element drawing current from it the same at every pt?
there should not be any diff.because Read More
An electric current carries electrons from an area of high potential to another area of low potential. Potential difference is the condition that must exist for a current to move electrons around. Read More
When the current traveling through a resistor is increased what happens to the voltage that travels through the same resistor?
Your question reveals fundamental misunderstandings about the nature of electricity. 'Voltage' is simply another word for 'potential difference', and a potential difference appears across opposite ends of the resistor; it doesn't 'travel through' that resistor! Current, on the other hand, DOES 'travel through' the resistor and is caused by the potential difference across the resistor. Resistance is the ratio of potential difference to current. So if the resistance remians unchanged when the current through it… Read More
Say 'emf' instead potential difference. Because while measuring the same no current is drawn and just balancing the potential across with the potential drop on the balancing length of the potentiometer wire. While balancing the galvanometer shows null deflection. So no current flows through the galvanometer. A perfect balance with the potential difference (EMF) of a cell with potential drop across that particular length. Read More
The same current passes through all the devices, and the sum of the potential differences across the devices is equal to the terminal potential difference across the power supply. Read More
This is a weird comparison but role with me here. Imagine a lazy river with beach balls in it. The river essentially is the potential, also known as the voltage. It acts as sort of the pushing force to the beach balls which is the current. Current by definition is charge per second so how much charge is going through a conductor in a second. This means current is actual "stuff" unlike potential, or voltage… Read More
The current ratings of the contacts of a relay are written on the side of the protective envelope that covers the contacts. Read More
At constant temp.& pressure,on the same circuit,with potential difference unchanged,current reduces if resistance increases.(Ohm's law). Read More
Because each foot is at the same potential, so no current can pass through their body. Read More
By current direction, we mean the direction of current in an external circuit, not within a voltage source. In metal conductors, current is a flow of electrons which takes place from a negative potential to a positive potential. But in fluids, current may be a flow of charged atoms, called 'ions', and these may flow from a positive potential to a negative potential. Read More
Opposites attract, a place with relative high potential has the property of equalizing potential over the available space and so electric current flows to the lower potential to even out the overall potential. Read More
a relay is used, so that a small amount of current can control a large amount of current. in the case of fuel injectors, there is not a large amount of current, therefore, there is no fuel injector relay. Read More
How does the direction of an electrical circuit move on a battery device differ from the direction of an ac current?
In a DC circuit (battery), the lower potential is always on one 'end' of the circuit so the current always flows in the same direction. In a AC circuit, a wave is generated so each end cycles between high and low potential. Current always flows towards lower potential and changes direction every time the higher/ lower potential changes Read More
If the current exceeded the threshold current or (nominal current) which is already defined and configured to the relay. For example, if the Threshold current is 1 Amps, and a fault occurred in the system which will result to increase the current so it will be higher than 1 Amps, lets say 5 Amps, so the relay will operate to stop the faulted section. Read More
A reverse current relay prevents a generator from discharging the battery when generator output is less than battery voltage. When generator output is greater than battery voltage, the reverse current relay closes and connects generator to electrical bus. Read More
What is the resistance of a circuit across which 4 volts of potential produces 5 amperes of current?
Your question should specify a 'potential difference', not a 'potential', of 4 V. You can solve this yourself, just divide the potential difference by the current. Read More
The flow of charge, or current, results from an electrical potential difference applied across the ends of the wire. When such a potential is applied, electrons will move from low potential to high potential, creating a current. Read More
Ohm's Law: Current equals voltage (potential difference) divided by resistance. Read More
Normally the Over current relay is connected using a suitable CT (Current Transformer). Say the CT ratio is 100/5 Amps. (secondary is normally 5 or 1 amps). 100 Amps in the primary induces 5 amps in secondary which flows through over current relay circuit. Secondary current is proportional to the primary current. To test the OCR , inject the current into relay circuit ranging from 0 to 5 amps in steps (which represents upto full… Read More