Phoenix redundant module 2902879 original DIN rail installation

Phoenix redundant module 2902879 original DIN rail installation

Voltage is the reason that drives the directional movement of charges to form current. The reason why current can flow in wires is also because there is a difference between high and low potential in the current. This difference is called potential difference, also known as voltage. let me put it another way. In a circuit, the potential difference between any two points is called their voltage. Usually using lettersVRepresents voltage.

A power supply is a device that provides voltage to both ends of an electrical appliance. The magnitude of the voltage can be measured using a voltmeter (symbol: V).

Voltage law of series circuit: The total voltage at both ends of the series circuit is equal to the sum of the voltages at both ends of each part of the circuit.

Formula: ∑ U=U1+U2

Voltage law of parallel circuit: The voltage at both ends of each branch of the parallel circuit is equal and equal to the power supply voltage.

Formula: ∑ U=U1=U2

Ohm's Law: U=IR (I is current, R is resistance), but this formula only applies to pure resistance circuits

Between two pointselectric field intensityThe line integral. Voltage represents the work done by the electric field force on a unit positive charge moving from one point to another in the field. atInternational System of UnitsIts main unit is volts (V). voltageDefinition formulaUab=∫ (b, a) Edl. In the equation, Uab represents the voltage between point a and point b, E is the electric field strength, and dl is the line element on the integration path. If the above equation is positive, then Uab is the voltage drop from a to b (referred to as voltage drop); If the above equation is negative, then Uab is the voltage rise (referred to as voltage rise).

In an electrostatic field, every point is fixedThe reference point has a certain potential, and the voltage between two points is their potential difference. That is, Uab=φ a - φ b. In the formula, φ a and φ b are the potentials at point a and point b, respectively. The voltage or potential difference between two points is independent of the selection of the potential reference point.

Phoenix redundant module 2902879 original DIN rail installation