Malay ko sa Contacts na yan!! :D

Sa contacts lang ang diskarte nyan. hehe

Contacts

Well, there are terms that may be confusing for young electrical students at para na din sa ibang tao. I mean, like in switches, my mga terms na technical na pag narinig pa lang ay ganito kaagad ang masasabi: "?gh?anfls?". 

Isa na rito ang switch configuration. Ano ba ang single-pole single throw, double pole double throw, four pole double throw, at paano mo masasabi kung ang isang switch ay ganyan o ganito?

The definition lies on the two important KEY WORDS. POLE and THROW.

Ang dalawang salita na yan ay tungkol sa switch contact variations.

A "pole" is a set of contacts and terminal para sa ISANG CIRCUIT.

Ang salitang "throw" naman ay para sa iba't ibang posibleng posisyon na pwede sa switch.For example, a single throw switch has one position that closes a contact, at ang double -throw has two positions, kagaya ng "make-before-break" mechanism ng relay, and so on. ;)

1) SINGLE POLE-SINGLE THROW:

Ang pinakasimpleng on-off switch: The two terminals are either connected together or not connected to anything. An example is a light switch.

American wiring name: two-way switch

2) SINGLE POLE DOUBLE THROW

A simple changeover switch: C (COM, Common) terminal na pwede maconnect sa L1 o sa L2. Pag nakadeenergize ang switch ay magkadikit ang common at L1 pero pag naenergize ito ay lilipat ang common at didikit sa L2.
Double throw kasi DALAWA ang pwedeng posisyon ng switch. Magpapalipat lipat lang ang common sa line 1 at sa line 2.

American wiring name: three way switch

3) DOUBLE POLE SINGLE THROW
Take note na dalawang single pole single throw lang sya na kinokontrol ng isang mechanism. Pag nakaopen yung isa, ganun din sa pangalawa.
At pag nakaclose contact ang isa, ganun din ang isa.


American wiring name: double pole switch
4) DOUBLE POLE DOUBLE THROWIto'y dalawang SPDT switches controlled by a single mechanism.
A is connected to B and D to E, or A is connected to C and D to F. ;)




Conclusion:
Switches with larger numbers of poles or throws can be described by replacing the "S" or "D" with a number or in some cases the letter "T" (for "triple"). In the rest of this article the terms SPST, SPDT ;)

Related link:
www.tpub.com/.../neets/14175/css/14175_209.html