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If voltage is zero or very low on one phase and the same as line to line voltage on the other two. Is there a short to ground on the low voltage phase?
Wiki User
∙ 14y ago
From your question it's hard to tell what might be the source of your problem. Is this a primary source to a machine or multiple circuits or from a transformer to just one device like a motor. If it is a short to ground then it should be tripping fuses or breakers if not then you have a unsafe situation in a ungrounded system. If the power is from a transformer then it may have an open winding or blown fuse on either the primary or secondary side.
Wiki User
∙ 14y ago
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Why does a phase in secondary side in distribution transformer give low voltage?
transformer is busted; if input voltage is normal you have short circuit or open circuit somewhere
What happens to the voltage values of other resistors when a short occurs in one of them?
If a short occurs in a resistor in series with other resistors, the voltage drops across the other resistors will increase. If a short occurs in a resistor in parallel with other resistors, the voltage drops across the other resistors will decrease, to zero.
How does a thermal overload control a circuit when the phase short to ground?
If you are describing a circuit breaker then its electromagnetic trip component will operate in the event of a line*-to-ground (*not 'phase'!) short circuit. The thermal overload component will only operate in the event of a sustained overload.
What is mean of Dead Short in Electrical Term?
The positive and negative voltage lines are tied together - OR - the positive line is shunted to ground with voltage appliedImproved AnswerA dead short is a connection with zero/near-zero resistance. It may be applied deliberately in order to perform tests, or, more usually, as the result of a catastrophic failure in some part/component."The positive and negative voltage lines are tied together - OR" - both lines of an a.c. supply are connected together."the positive line is shunted to ground with voltage applied" - OR - the negative line is shunted to ground, etc etc.
Why in slip test the machine voltage reduced?
The low slip test is used to determine the D and Q axis impedance of salient pole machines. The machine terminals are short circuited, each phase voltage and current are measured. Since the terminals are short circuited, machine voltage must be reduced to prevent excessive output currents that would damage the machine.
The difference between short to a voltage circuit and short to a ground circuit?
A short circuit is an abnormal connection between two nodes intended to be at different voltages. A voltage circuit is caused intentionally for the purpose of voltage sensing. A ground circuit occurs between a phase and the ground.
What happens when any phase conected to ground?
You get a short circuit.
Can you add 110 from another power source to 220 to get a usable 3 phase 240?
Short answer, no. Three phase line voltage is 120 degrees apart in separation. Single phase is 180 degrees apart. To maintain the injected voltage at 90 degrees to the single phase voltage would be nearly impossible to control.
What is indicated by reading of battery voltage on the ground side of component?
That a short to ground exists in the circuit.
Why does a phase in secondary side in distribution transformer give low voltage?
transformer is busted; if input voltage is normal you have short circuit or open circuit somewhere
What is indicated by reading of battery voltage on the side of component?
That a short to ground exists in the circuit.
What happens to the voltage values of other resistors when a short occurs in one of them?
If a short occurs in a resistor in series with other resistors, the voltage drops across the other resistors will increase. If a short occurs in a resistor in parallel with other resistors, the voltage drops across the other resistors will decrease, to zero.
How does a thermal overload control a circuit when the phase short to ground?
If you are describing a circuit breaker then its electromagnetic trip component will operate in the event of a line*-to-ground (*not 'phase'!) short circuit. The thermal overload component will only operate in the event of a sustained overload.
What are the causes for unbalance of currents of a 3 phase a c motor?
The main causes for unbalance of currents in a 3-phase AC motor include unequal voltage levels in the power supply, asymmetrical impedance in the motor windings, and uneven mechanical loads on the motor shaft. These imbalances can lead to overheating, efficiency loss, and potential damage to the motor components. Regular maintenance and monitoring can help identify and address these issues.
What is the formula to calculate the line to ground voltage of 480v?
If by "line" you mean a wire conductor carrying 480volts AC then there can be no "line to ground voltage" or you would have a short circuit!Ground voltage, usually referred to as "Earth" in electrical terms, is at zero potential and thus connecting a live 480 AC line straight to Earth is extremely dangerous and unless there is a means to cut the voltage when a short occurs (in a house this will be the fuse box, these days usually containing RCB's) an electrical arc at temperatures hotter than the Sun will be produced at the point of the short, the rest of the wire will get so hot it melts and the thermal damage will spread to other wires or any combustable materials in the nearby vacinity and a raging fire could easily ensue!There are tables giving the electrical breakdown resistance of the insulation used on electrical cables (Typically measured in kv per mm) and perhaps this may be more helpful to you.AnswerOf course you can have a line-to-ground voltage! If the line conductor has a potential of 480 V measured with respect to ground, then there is a line-to-ground voltage of 480 V. Period! End of story! The very presence of a voltage between a line conductor and ground indicates that there is NO short circuit, as the voltage across a short circuit is zero! But to answer the question, there is no calculation involved. But you can measure it with a voltmeter.
What does short circit mean?
short circuite means phase to phase,three phase short, phase to earth, three phase to earth, this is all short circuite
My 2000 Nissan Altima has a relay at the ECM How do I check this 4 pin relay 1 and 2 is resistance and 3 and 5 are normal open The socket has a 12 vdc wire?
to properly test relay you must have relay in circuit apply voltage to pin 1 if there is no diode there will not be a polarity issue. if there is a diode you must apply voltage to proper pin or you will have a short circuit. apply ground to pin 2 with coil energized there will be continuity across the other pins when voltage or ground is denied there will be no continuity. to properly test relay you must have relay in circuit apply voltage to pin 1 if there is no diode there will not be a polarity issue. if there is a diode you must apply voltage to proper pin or you will have a short circuit. apply ground to pin 2 with coil energized there will be continuity across the other pins when voltage or ground is denied there will be no continuity.
