SAFETY FACTOR ng Circuit Breaker Para sa Solar PV System

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I always say this to all participants of my Solar PV webinar & seminar... "An overrated overcurrent protection device (circuit breaker) is far more dangerous than an underrated one."
Sa mga nagtatanong na naguguluhan kung ano ba talaga ang dafety factor for circuit breaker caculation para sa solar PV system, kung eto ba ay 125% o 156%, eto na po ang video para sa inyo.
Ang susunod po na video neto, ay kung paano mag-kalkula ng circuit breaker para sa solar PV system in compliance with PEC and NEC.
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SOMETHING TO MEDITATE:
Galatians 6.7-8
Be not deceived; God is not mocked: for whatsoever a man soweth, that shall he also reap.
Philippians 4.8
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Опубликовано:

12 сен 2024

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Комментарии : 18

@JFLegaspi 8 месяцев назад

FOR INQUIRIES: jflegaspisolar@gmail.com DIRECT MESSAGE: facebook.com/jflegaspifb FOR SOLAR PV INSTALLATION & CONSULTATION: facebook.com/jflegaspisolar JOIN MY FB GROUP: facebook.com/groups/lithiumpowerphilippines WhatsApp: +45 3055 2662 PH Number: +63 906 595 8757

@jhunlecky8572 7 месяцев назад

Salamat po sa info .. yan nman po tlga ang nka sulat sa book ng electrical lalo na sa ..mga RME exam slamat .. God bless po

@ferdinandmaglangit3284 8 месяцев назад

Tama poh kau sir jf kung mappanood nyo rin poh ung vlog ni Will prowse mas ideal tlg ung 125% safety factor..slmt poh...

@Sak-en_Na 8 месяцев назад

Salamat sa explanation ninyo Sir, isa na naman katanongan na nabigyan ng malinaw na sagot....keep it coming Sir

@makerualpe6649 4 месяца назад

@JFLegaspi Sir 52A po ang calculation ko with safety factor for PV to SCC and SCC to BATTERY BANK. Ok na po ba ang 50A or deretcho nasa 63A parang over rated na po kasi sa next breaker Ah sana po masagot thanks!

@mike122478 2 месяца назад

Same question. Since 156% na yung max allowable. Ibig sabihin ba we should round down the mcb rating, to make sure na hindi ma exceed yung safety rating? Pero round up naman pag sa conductor rating?

@MARIELOGAYA-qw8lr 8 месяцев назад

Hello sir jf tanung ko lng po kung ano ang masganda na diy battery pack para solar set up ung 18650 po ba or ung 32650.? Salamat po sa sagot

@JFLegaspi 8 месяцев назад

Ang 32650 at 18650 aty matrabaho. Mas magandang gumamit prismatic LiFePO4 cells 😊👍☕️

@MARIELOGAYA-qw8lr 7 месяцев назад

@@JFLegaspi ung prismatic lifepo4 need parin po b un ng BMS/ACTIVE BALANCER.?

@coolits496 8 месяцев назад

Merry xmas Jf legaspi meron ba kayong solar installer sa Pinas since anyan kayo sa overseas. Gusto kong magpakabit ng 7kw on grid sa bahay namin sa cainta.

@JFLegaspi 8 месяцев назад

Meron, kailan mo ba gustong ipa-install?

@coolits496 8 месяцев назад

@@JFLegaspi This coming January ho kung pwede. Pwedeng mag Pa quote kung magkano Ang magagastos including installation and net metering.

@JFLegaspi 8 месяцев назад

Kung sigurado kayo, maari nyo akong kontakin sa aking FB messenger o di kaya WhatsApp. Nasa youtube channel ang mga contact info. www.youtube.com/@JFLegaspi

@gerdbeutler3728 8 месяцев назад

I still have some old 30W Modules with Isc 1.75 A. Imagine i use 50 pieces in parallel to have 1500W total PV Energy in a 12 V System. So my max current would be 1.75 x 50 x 1.25 = 109A. Next higher Standard size MCB is 125A, right? Do you would need a 25 mm2 cable rated for 170A. Here i start to scratch my head about such regulations to follow for PV Installations. Maybe they dont know the price of copper nowadays. Using 3 modern Panels of 500W and Isc 14A instead a MCB of 16 or 20 Amps are just fine as the 14A cen NEVER go higher. And if you use 10A ot less it will trip when the sun is shining. So why I need to study Regulations with hundrets of pages to comply, when some common sense will do? Next year i will upgrade to a hybrid Inverter and apply for a Netmeter connection. So I follow the laws here to be conform.

@JFLegaspi 8 месяцев назад

The best solution for your solar pv system dilemma is to use an inverter (hybrid or grid-tied) that supports 500V or even better 1000V PV Voltage. In this setup, you won't be doing parallel connection but rather series connection that could result to a lower Isc (short circuit current). In this way, your system will be become efficient and would only require a 4mm^2 to 6mm^2 PV cable.

@gerdbeutler3728 8 месяцев назад

@@JFLegaspi HI JF, That was just hypothetical to point out the dilemma about the MCB size. As PV voltage drop and cable cost matters, parallel solar panels don't make much sense anymore. Inverters are also built for 11 or 13 Amps per MPPT string. So I just see a 16 or 20 Amp Fuse in real life. Maybe those regulations are made at a time, when Solar panels had much different specs.

@JFLegaspi 8 месяцев назад

@@gerdbeutler3728 ok, I get it. Well, there are so many inverters nowadays that can handle more than 13A per MPPT string.

@gerdbeutler3728 8 месяцев назад

@@JFLegaspi you are right considering 12 and 16kW Inverters. As my consumption is rather low, it's not really on my scope.