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What is the voltage of other two phase of 3 phase system when One phase is open?
Wiki User
∙ 10y ago
If you mean 'phases' and not 'lines', then the loss of a phase has no effect on the voltages provided. You will still obtain three voltages, displaced from each other by 120 degrees.
Wiki User
∙ 10y ago
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What are phases in electrical supply and how do they work?
'Phase' refers to a winding into which a voltage is induced in an alternator or in a transformer or motor. The voltage across a phase is known as a 'phase voltage', and the current through it is a 'phase current'.'Three-phase', means that there are three such windings in a machine, physically displaced from each other by 120 degrees, with each phase voltage is displaced by 120 electrical degrees.The term 'phase' is sometimes, incorrectly, used to describe the 'hot' wire in an electrical installation -the correct term, though, is 'line'.
There are five stages of growth in an open system of culture?
Lag phase, exponential or log phase, stationary phase, death phase, and phase of prolonged decline.
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
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?
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.
Can you list the Advantages of delta system over star system?
If one phase becomes damaged or open, the remaining two phases can still deliver three-phase power but at a reduced capacity. It is refered to as an open delta.
Can you join two of single phase to two phase power system?
This is a rubbish questionTwo single phase transformers can be combined together to make a three phase system. It does not become a two phase system. Look up information of an open delta wired distribution system to see how they are tied together.See related links below.
Explain the open delta fault in the power system.what is the use of the protection.?
There some kind of relays that need measure zero sequence voltage. For instance: - To polarize a phase-to-neutral distance relay - To detect a fault-to-ground in a system grounded by thre-phase generator with star connection. A TP in a star-open delta connection can provide a 3V0 information.
What are line voltage and phase voltage?
There is no such thing as 'voltage between phases'. The voltage you are referring to is the voltage between LINES -which is why it is called a 'line voltage'! That depends on the type, voltage, and phasing of the system in question. Residential single phase service in the US is 220V between the two lines, 110V from either line to neutral. A common 207/110V 3 phase system is 110V from line to neutral, 207V between lines. This is mostly used in industrial settings. Beyond that you really need to look at the type of system in question, and gather your information from that. This question is too open-ended to answer specifically.
What happens when a phase gets short and also when it get opened in a delta and star connection?
In star connection when two phase is short,it work as single phase system. In delta when one phase is open ,it work as a single phase.
How can you include phase failure relay in your star delta motor starter circuit?
The star delta motor starter circuit has to have a control voltage to energize the motor magnetic contractors. A phase failure relay monitors all three phases of the incoming supply lines. The phase failure relay also has auxiliary contacts on it. There are usually two sets of "C" form contacts. The control voltage for the starter circuit must be connected across the normally open (N.O.) contacts of one of these two sets. When the phase monitor is energized these N.O. contacts close supplying the control voltage to the circuitry of the star delta starters. If there is a phase interruption, phase reversal or phase loss, the phase failure relay will de-energize and the N.O. contacts will go back to their de-energized state. If the star delta motor starter is in use at the time, its control circuitry voltage will be lost and the delta motor magnetic contactor will open. The opening of this contactor will disconnect the motor from the failed three phase supply.
Can a 3 phase slip ring motor start when its one resistance or phase is open?
A three phase motor will not start if one phase leg is open.
The voltage measured directly across an open switch in a circuit will be?
The voltage measured across an open in a series circuit is the equivalent of the sourse voltage.
