"YOUR FRIENDLY PHILIPPINE FOREIGNERS AND PHILIPPINE PROVINCES ONLINE ELECTRICAL SUPPLIER"

"YOUR FRIENDLY PHILIPPINE FOREIGNERS AND PHILIPPINE PROVINCES ONLINE ELECTRICAL SUPPLIER...AND SERVICE PROVIDER" WE'LL HELP YOU OWN YOUR ELECTRICAL SUPPLIES REQUIREMENTS

Thursday, September 12, 2013

Single-phase electric power..what you will learn... for your philippine electrical concerns...needs...installation...orders...safeelectrical2013@gmail.com

Single-phase electric power


In electrical engineering, single-phase electric power refers to the distribution of alternating current electric power using a system in which all the voltages of the supply vary in unison. Single-phase distribution is used when loads are mostly lighting and heating, with few large electric motors. A single-phase supply connected to an alternating current electric motor does not produce a revolving magnetic field; single-phase motors need additional circuits for starting, and such motors are uncommon above 10 or 20 kW in rating.
In contrast, in a three-phase system, the currents in each conductor reach their peak instantaneous values sequentially, not simultaneously; in each cycle of the power frequency, first one, then the second, then the third current reaches its maximum value. The waveforms of the three supply conductors are offset from one another in time (delayed in phase) by one-third of their period. When the three phases are connected to windings around the interior of a motor stator, they produce a revolving magnetic field; such motors are self-starting.
Standard frequencies of single-phase power systems are either 50 or 60 Hz. Special single-phase traction power networks may operate at 16.67 Hz or other frequencies to power electric railways.
In some countries such as the United States, single phase is commonly divided in half to create split-phase electric power for household appliances and lighting.

Splitting out[edit source | editbeta]

Single phase polemount stepdown transformer (Canadian).
No arrangement of transformers can convert a single-phase load into a balanced load on a polyphase system. A single-phase load may be powered from a three-phase distribution system either by connection between a phase and neutral or by connecting the load between two phases. The load device must be designed for the voltage in each case. The neutral point in a three phase system exists at the mathematical center of an equilateral triangle formed by the three phase points, and the phase-to-phase voltage is accordingly \sqrt{3} times the phase-to-neutral voltage.[1] For example, in places using a 415 volt 3 phase system, the phase-to-neutral voltage is 240 volts, allowing single-phase lighting to be connected phase-to-neutral and three-phase motors to be connected to all three phases.
In North America, a typical three-phase system will have 208 volts between the phases and 120 volts between phase and neutral. If heating equipment designed for the 240-volt three-wire single phasesystem is connected to two phases of a 208 volt supply, it will only produce 75% of its rated heating effect. Single-phase motors may have taps to allow their use on either 208 V or 240 V supplies.
On higher voltage systems (on the order of kilovolts) where a single phase transformer is in use to supply a low voltage system, the method of splitting varies. In North American utility distribution practice, the primary of the step-down transformer is wired across a single high voltage feed wire and neutral, at least for smaller supplies (see photo of transformer on right). Rural distribution may be a single phase at a medium voltage; in some areas single wire earth return distribution is used when customers are very far apart. In Britain the step-down primary is wired phase-phase.

Applications[edit source | editbeta]

Single-phase power distribution is widely used especially in rural areas, where the cost of a three-phase distribution network is high and motor loads are small and uncommon.
High power systems, say, hundreds of kVA or larger, are nearly always three phase. The largest supply normally available as single phase varies according to the standards of the electrical utility. In the UK a single-phase household supply may be rated 100 A or even 125 A, meaning that there is little need for 3 phase in a domestic or small commercial environment. Much of the rest of Europe has traditionally had much smaller limits on the size of single phase supplies resulting in even houses being supplied with 3 phase (in urban areas with three-phase supply networks).
In North America, individual residences and small commercial buildings with services up to about 100 kV·A (417 amperes at 240 volts) will usually have three-wire single-phase distribution, often with only one customer per distribution transformer. In exceptional cases larger single-phase three-wire services can be provided, usually only in remote areas where poly-phase distribution is not available. In rural areas farmers who wish to use three-phase motors may install a phase converter if only a single-phase supply is available. Larger consumers such as large buildings, shopping centers, factories, office blocks, and multiple-unit apartment blocks will have three-phase service. In densely populated areas of cities, network power distribution is used with many customers and many supply transformers connected to provide hundreds or thousands of kV·A, a load concentrated over a few hundred square meters.
Three-wire single-phase systems are rarely used in the UK where large loads are needed off only two high voltage phases.
Single-phase power may be used for electric railways; the largest single-phase generator in the world, atNeckarwestheim Nuclear Power Plant, supplies a railway system on a dedicated traction power network.

Grounding[edit source | editbeta]

Typically a third conductor, called ground (or "safety ground") (U.S.) or protective earth (UK, Europe, IEC), is used as a protection against electric shock, and ordinarily only carries significant current when there is a circuit fault. Several different earthing systems are in use.

References[edit source | editbeta]

  1. Jump up^ See three phase. This arises from the phase difference between the conductors. If two conductors are energized with ac voltages that are the same magnitude and in-phase, there will be no voltage difference between them. If the voltages are the same magnitude and one voltage is delayed one-half cycle with respect to the other, the voltage between the two will be double. In a three phase system the phase difference between conductors is one-third of a cycle; a little bit of algebra would show that the voltage difference between two conductors is the square root of three the magnitude of the phase to neutral voltage.

for your philippine electrical concerns...needs...installation...orders...safeelectrical2013@gmail.com

METRO MANILA PHILIPPINES

WIRE AND CABLE SUPPLIER IN METRO MANILA
WIRE AND CABLE SUPPLIER IN QUEZON CITY

WIRE AND CABLE SUPPLIER IN LUZON
WIRE AND CABLE SUPPLIER IN VISAYA

WIRE AND CABLE SUPPLIER IN SUBIC
WIRE AND CABLE SUPPLIER IN CLARK

WIRE AND CABLE SUPPLIER IN THE PHILIPPINES
WIRE AND CABLE SUPPLIER IN THE PHILIPPINES

ELECTRICAL SUPPLIER IN METRO MANILA
ELECTRICAL SUPPLIER IN QUEZON CITY

ELECTRICAL SUPPLIER IN LUZON
ELECTRICAL SUPPLIER IN VISAYA

ELECTRICAL SUPPLIER IN SUBIC
ELECTRICAL SUPPLIER IN CLARK

ELECTRICAL SUPPLIER IN PHILIPPINE INDUSTRIAL PARK
ELECTRICAL SUPPLIER IN PHILIPPINE ECONOMIC ZONE

ELECTRICAL SUPPLIER FOR PHILIPPINE FOREIGNERS
ELECTRICAL SUPPLIER FOR PHILIPPINE PROVINCES

ELECTRICAL SUPPLIER IN PHILIPPINES BATANES
ELECTRICAL SUPPLIER IN PHILIPPINES LAOAG

ELECTRICAL SUPPLIER IN PHILIPPINES CLARK
ELECTRICAL SUPPLIER IN PHILIPPINES SUBIC

ELECTRICAL SUPPLIER IN PHILIPPINES MANILA
ELECTRICAL SUPPLIER IN PHILIPPINES BATANGAS

ELECTRICAL SUPPLIER IN PHILIPPINES LEGASPI
ELECTRICAL SUPPLIER IN PHILIPPINES BORACAY


ELECTRICAL SUPPLIER IN PHILIPPINES PALAWAN
ELECTRICAL SUPPLIER IN PHILIPPINES PUERTO PRINCESA


ELECTRICAL SUPPLIER IN PHILIPPINES ILOILO
ELECTRICAL SUPPLIER IN PHILIPPINES BICOL

ELECTRICAL SUPPLIER IN PHILIPPINES CEBU
ELECTRICAL SUPPLIER IN PHILIPPINES BOHOL

ELECTRICAL SUPPLIER IN PHILIPPINES SURIGAO
ELECTRICAL SUPPLIER IN PHILIPPINES DUMAGUETE

ELECTRICAL SUPPLIER IN PHILIPPINES BACOLOD
ELECTRICAL SUPPLIER IN PHILIPPINES CAGAYAN DE ORO

ELECTRICAL SUPPLIER IN PHILIPPINES SURIGAO
ELECTRICAL SUPPLIER IN PHILIPPINES BUKIDNON

ELECTRICAL SUPPLIER IN PHILIPPINES ILIGAN
ELECTRICAL SUPPLIER IN PHILIPPINES ZAMBOANGA

ELECTRICAL SUPPLIER IN PHILIPPINES BUTUAN
ELECTRICAL SUPPLIER IN PHILIPPINES GENERAL SANTOS

ELECTRICAL SUPPLIER IN PHILIPPINES ZAMBOANGA
ELECTRICAL SUPPLIER IN PHILIPPINES DAVAO

ELECTRICAL SUPPLIER IN PHILIPPINES CAGAYAN DE ORO
ELECTRICAL SUPPLIER IN PHILIPPINES CAGAYAN DE ORO


FOR YOUR PHILIPPINE ELECTRICAL CONCERNS...NEEDS...INSTALLATION...QUOTATION...ORDERS
KINDLY EMAIL US: SAFEELECTRICAL2013@GMAIL.COM
                 SAFEELECTRICALONLINE@GMAIL.COM

FOR YOUR PHILIPPINE ELECTRICAL CONCERNS...NEEDS...INSTALLATION...QUOTATION...ORDERS:
KINDLY EMAIL US: SAFEELECTRICAL2013@GMAIL.COM
                 SAFEELECTRICALONLINE@GMAIL.COM

FOR PHILIPPINE INQUIRIES LIKE LIGHTNING ARRESTER SUPPLY AND INSTALLATION
CONTACT US:  

FOR PHILIPPINE INQUIRIES LIKE LIGHTNING ARRESTER SUPPLY AND INSTALLATION
CONTACT US: 

FOR PHILIPPINE INQUIRIES LIKE LIGHTNING ARRESTER SUPPLY AND INSTALLATION
CONTACT US: 

MOBILE NUMBERS: SMART: +63 09079522099 
                       +63 09214026477
  
                GLOBE: +63 09273919600
                       +63 09157920129

                SUN:   +63 9227192434
                       +63 09336253505

                WIRELESS LANDLINE:   +63 4068727
                                     +63 4922566
                
                LANDLINE:    +63 4317553



HURRY..CALL US...NOW!!!!
THANK YOU FOR YOUR ORDERS AND INQUIRIES...



LIGHTNING ARRESTER SUPPLIER AND INSTALLER IN THE PHILIPPINES
ELECTRICAL FENCE SUPPLIER AND INSTALLER IN THE PHILIPPINES


LIGHTNING ARRESTER SUPPLIER AND INSTALLER IN METRO MANILA
ELECTRICAL FENCE SUPPLIER AND INSTALLER IN METRO MANILA

LIGHTNING ARRESTER SUPPLIER AND INSTALLER IN THE PHILIPPINE ECONOMIC ZONE
ELECTRICAL FENCE SUPPLIER AND INSTALLER IN THE PHILIPPINE ECONOMIC ZONE

LIGHTNING ARRESTER SUPPLIER AND INSTALLER IN THE VISAYA REGION
ELECTRICAL FENCE SUPPLIER AND INSTALLER IN THE VISAYAS REGION

LIGHTNING ARRESTER SUPPLIER AND INSTALLER IN THE MINDANAO
ELECTRICAL FENCE SUPPLIER AND INSTALLER IN THE MINDANAO


FOR YOUR LIGHTNING STRIKE PROTECTION...LET US HELP YOU AVOID SUCH ACCIDENTS...
BEFORE IT IS TOO LATE...BEFORE IT IS TOO LATE...

WHEN LIGHTNING STRIKE HIT YOU..
I GUARANTEE YOU..YOU'LL NEVER LIVE TO TELL YOUR EXPERIENCE...

DON'T BE THE NEXT VICTIM...PROTECT YOURSELF..YOUR FAMILY..YOUR BUSINESS AT ALL TIMES..
INSTALL A LIGHTNING ARRESTER IN YOUR PLACE...DO IT NOW BEFORE YOUR CAUGHT UNAWARE...

IF YOU HAVE LIGHTING PROTECTION INSTALLED...
YOU'LL HAVE PEACE OF MIND...YOU CAN SLEEP WELL EVEN WHEN LIGHTNING STRIKES...

YOU KNOW YOUR WELL PROTECTED...
IN YOUR HOME, IN YOUR PLACE OF BUSINESS AND IN YOUR PROPERTIES...

HURRY..CALL US...NOW!!!!
THANK YOU FOR YOUR ADVANCE ORDERS AND INQUIRIES...


"PHILIPPINE FOREIGNERS AND PHILIPPINE PROVINCES ELECTRICAL SUPPLIER
 AND SERVICE PROVIDER"

SAFE ELECTRICAL SUPPLY AND SERVICES
SAFE ELECTRICAL SUPPLY AND SERVICES

SAFE ELECTRICAL SUPPLY AND SERVICES
SAFE ELECTRICAL SUPPLY AND SERVICES

No comments: