Contents
How is line drop compensation calculated?
These R & X voltage setting values are calculated as follows: Rset = CT primary rating* x line resistance (ohms) / VT ratio Xset = CT primary rating* x line reactance (ohms) / VT ratio * Primary current resulting in rated current (200 ma) in the control.
What is the line loss problem?
Line loss refers to the power that is lost in an electrical conductor during the transmission and distribution phase. It gives a quantitative estimation of the amount of power that is converted from electrical energy to heat energy in wire conductors, which is then dissipated.
Why am I getting a voltage drop?
Causes of Voltage Drop Excessive dropping is due to increased resistance in a circuit, typically caused by an increased load, or energy used to power electric lights, in the form of extra connections, components, or high-resistance conductors.
How to compensate for cable voltage droops?
Designers overcome this voltage drop by increasing the output voltage at the source. Instead of the fixed 5V, the converter would generate 5.6V, which after the 0.6V drop would present the necessary 5V to the load. They do this by monitoring the load current by adding a sense resistor in the path of the output current.
What should the voltage drop be on a USB cable?
That makes the overall resistance of the USB cable to be 286 milliohms. Typical converters are designed to supply a maximum output current of 2.1A. That means the voltage drop across the cable would be 0.6V when it is supplying maximum current. The voltage expected at the end of the cable would drop to 4.4V for a 5V set-voltage converter.
What should voltage be at end of cable?
The voltage expected at the end of the cable would drop to 4.4V for a 5V set-voltage converter. This is much lower than the maximum lower-limit of most loads working at 5V and this may lead to potential issues with high-current loads.
What causes a voltage droop on a power supply?
With system load located at a distance from the output of the power supply, the absence of remote sensing may cause the voltage seen by the load to be significantly lower than desired. Contribution to the voltage droop is from thin circuit board traces, connector interface and cabling resistance.