俿 ( ҷ )͹ 2 : ͡Ҵ俿Ѻҹ

俿 ( ͧҷ ) ͹ 2: ͡Ҵ俿Ѻҹ

ʴդѺءҹ...Ѻ㹵͹
2 ҷǡѺ͡颹Ҵ俿դѺҹͧػó俿


鹵͹͡ẺҴ俿դѺػó俿


㹡͡Ҵ俿դѺҹҨдٷ ԡѴ÷俿Ңͧ俿Ӥѭ ǤͶػó俿ҡԹ俿ҡҡͧ͡颹Ҵ俿˭
ػó俿ҡԹ俿ҹҡ俿ҷբҴŧ ´ҡҧʴѧ
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Ҩҧҹ ͡Ҵ俿դѺҹẺ
2 ͧѡѧʴ١ᴧѺԹѧ

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¡ҧ 俿ҪԴ VAF Ҵ 2.5 sq.mm վԡѴ÷俿 21 ( A ) 俿ҢҴ 25 sq.mm վԡѴ÷俿 91 A Ҵͧ俿ҡ ѵҾԡѴ÷俿ҡҡҹ ѧҨеͧ͡颹Ҵͧ俿ѺҴͧŴػó俿

鹵͹㹡ҢҴͧ俿դѺػó俿 մѧ


1.
ͧҡ俿Ңͧػó俿 Ѻҡ俿ҹҡ蹻·Դçػó俿

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ҡٻ ػó俿ͧѺҡ ( ٻ ) 蹻·͡ŷҧ俿ҢͧͧѺҡͧ ҹҧͧͧ ѧʴٻ Ҩҡ蹻¨кͧ͡ѺҡȨСԹ俿 դ
10.50 ( A )

˵ 㹡óշ蹻¢ͧػó俿ҹ͡ҡ俿 ͧͧԹ˵ ԸդӹdzҤҡ俿ҴԸէ Ӥҡѧ俿( ˹ѵ,w ) ô çѹ俿 ( ˹ŷ , V ) ¹ٵá

I = P / U

˹ I = ҡ俿Ңͧػó俿 ˹ ( A )

P = ҡѧ俿Ңͧػó俿˹ ѵ( W )

U = çѹ俿ҷػó俿ҹ˹ ŷ( V )

ͧѺҡȴѧٻ ͡ҡ俿 ͧҤӹdzҤҡ俿Ҵѧ

ҡ蹻¨ ҡѧ俿( P ) = 2330 ѵ ( W ) , çѹ俿㹺ҹ ( U ) = 220 ŷ ( V )

᷹ٵôҹ

I = 2330 W / 220 V

= 10.60 A


Ҥҡ俿ҷӹdzդ§Ѻҡ俿ҷк蹻


2
. ͤҡ俿 ա 25 % ·ʴػó俿ͷӧҹԴ͡ѹԹ 3 ԷҾ÷ӧҹŴŧͻҳ 80 % ѧ 俿ҷҨйҹǡѹ ҹԴ͡ѹԹ
3 ԷҾ㹡÷ʡŴŧͻҳ 80 % 繡êԷҾ㹡÷俿Ңͧ俿ǹ µͧաͤҡ俿ա 25 %͹ ǹӤҡ俿ҷ ҢҴ俿㹢鹵͹

ҡ鹵͹1ҡ俿 դ 10.55

( ӡա 25 % )ҡ俿 դ 10.55 X 1.25 ( Դ 125 % )

դ = 13.18 A

3.
Ӥҡ俿 ԴҧҢҴ俿 ҨйӤҡ俿ҷӡ 25 % ;ٴաẺ˹觡ͤҡ俿ҷ 125 % դҡѺ 13.18 A ºѺҧ Ҩеͧ俿ҷբҴ 1.5 sq.mm( ԡѴ俿 21 A ) 㹡Թ俿ѺͧѺҡȴѧٻ 駹ͧҡ俿 ѵҾԡѴ÷俿ҡҤҡ俿ҷŨԧǧ з俿͹ Դغѵ˵Ѥ

ػ

㹡͡Ҵ俿ҢԴ VAF դѺҹ բ鹵͹㹡ҷ 3 鹵͹ ѧ

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ѧҧ ¹㹡ҢҴ俿դѺҹФѺ ҧ¨բ¡ѺҧԹ俿ҷҵͧõ俿ҹШͧ͡.......ѧաԴ֧͡͡Ҵͧػóͧѹк俿ͷҤ¡ѹ Եá ͡ҡѹ㹤˹
ФѺ

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