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Mai shi da Nominal Voltage?

Nominal voltage wani abu ake kira zuwa wata circuit ko system don bayyana tsohon voltage class (misali, 120/240 volts, 300 volts, 480Y/277 volts). Aiki na voltage yadda ake yi a cikin circuit zai iya kasance daga nominal voltage a kan haddadin da ke da shawarwari don aiki masu alamomi.

Kalmomin “nominal” na nufin “kiran”. Ba shi ne voltage mai kyauko ko rated. Misali, wanda ake kira 240-volt ba za su duka 240.0000 volts, amma zai iya yi aiki a 235.4 volts.

Wani abu nominal (misali, girman, tsarin, voltage) shine abu da ake kira wani abu don haka ko daidai ake magana game da shi.

Nominal voltage an amfani da shi a matsayin voltage reference don bayyana batteries, modules, ko electrical systems. Wannan shine supply circuit system voltage da ake iya haɗa shi. Zan iya hasashen shi a matsayin “approximate” ko “average” voltage level (amama bai zama “average” ba).

Nominal Voltage vs Rated Voltage

Voltage level ta electrical power system shine Nominal Voltage. Ana kiran shi a matsayin system voltage. A 3-phase systems, voltage daga cikin external lines shine nominal voltage.

Voltage range da ake gina equipment don yi aiki a cikin haddarin da ke da shawarwari don aiki masu alamomi shine rated voltage. Saboda haka, rated voltage wata electrical equipment shine voltage mai kyauta da equipment zai iya yi aiki a cikin thermal limit baya tabbas ba.

A nan designer ya kamata ya gane voltage safety margin don aiki equipment a cikin haddarin da ke da shawarwari don aiki masu alamomi.

Rated voltage value ya kamata yake fi mai karfi da nominal voltage, don aiki masu alamomi. Yanayin da ke dace wa nominal da rated voltages ya kamata yake fi mai karfi don yanayi a nominal voltage a cikin power lines.

Don samun fahimta mafi inganci game da rated voltage, duba aiki a circuit breaker circuit. Electrical circuit breaker shine switching device da ake iya haɗa shi manually da automatic don kula da protection a electrical power system. Daga binciken insulation system ta circuit breaker, rated voltage ta circuit breaker yana vary.

Circuit breaker an gina shi don yi aiki a cikin highest RMS voltage, wanda ake kira rated maximum voltage ta circuit breaker. Wannan value yana fito da nominal voltage da ke gina circuit breaker, kuma shine upper limits for operation. Rated voltage an bayyana a kV RMS.

A lura, ‘rated voltage’ shine voltage mai kyauta da circuit-breaker zai iya interrupt safely baya tabbas da arcing. Amma ‘nominal voltage’ shine voltage da ake gina circuit-breaker don aiki a matsayin.

Nominal Voltage vs Operating Voltage

Voltage da equipment ya yi aiki shine operating voltage. Don aiki masu alamomi, ya kamata a yi aiki a cikin haddarin da ke da shawarwari don aiki masu alamomi. Operating voltage shine actual voltage da ake haɗa shi a terminal na equipment.

A multimeter an amfani da shi don kula voltage a terminal na equipment. Idan voltage da ake haɗa shi yana da kyau ko kadan da rated voltage, aiki na equipment zai canzawa.

A nan misali, don 132 kV power system, an haɗe circuit breaker da following specifications. Idan operating voltage ba a cikin haddarin da ke da shawarwari don aiki masu alamomi, aiki na equipment zai canzawa.

Nominal Voltage – 132 kV
Rated Voltage – 132 kV +/- 10 % [118.8 – 145.2 kV ]
Operating Voltage – Can be in the range of 118.8 to 145.2 kV.

Mai shi da Nominal Voltage ta Battery?

Battery shine electrochemical device wanda yana generate voltage potential idan ake haɗa metals of various affinities a acid solution.

Misali, battery da voltage mai kyauta 1.62 V amma ana kiran shi a matsayin “1.5-volt battery”, wanda yana nufin cewa battery na nominal voltage 1.5 V. Wani misali na biyu shine term “DC 12V” wanda yana bayyana 12V battery, baya tabbas da ya zo (13.7 Vdc) ko ya rage (10Vdc).

Source: Electrical4u

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