marcelino
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« on: August 24, 2009, 05:45:49 PM » |
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ang aircon ko ay 1HP. eto ang full specs.  at eto naman ang relay:  pwede kaya tong gamitin? eto ang datasheet: http://www.sparkfun.com/datasheets/Components/T9A_DS.pdfnagdadoubt ako kasi, di ba may mataas na current ang nagkikick-in during start-up ng A/C? di ko alam kung papano yun ikacalculate. hehehe  grabe kasi ang brownout dito saamin ngayon. "intermitent"! nawawala at bumabalik naman kaagad. kung di pwede, may mairarecommend ba kayo? |
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« on: August 24, 2009, 05:45:49 PM » |
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kinyo
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« Reply #1 on: August 24, 2009, 07:03:59 PM » |
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oo pwede ... contact rating nya 30A ... it is more than the typical startup current (3X of full load, in your case ~12A)
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marcelino
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« Reply #2 on: August 24, 2009, 07:11:51 PM » |
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oo pwede ... contact rating nya 30A ... it is more than the typical startup current (3X of full load, in your case ~12A)
well, thanks.. i just need someone to assure me about this. heheheh |
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"Don't take life seriously. After all, no one has ever come out of it alive. -Bugs Bunny"
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insomartin
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« Reply #3 on: August 24, 2009, 07:20:13 PM » |
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pwede! bakit hindi? di naman lagi intermittent yung switching. basta mataas din yung 5volts (current). baka di bumitaw yung relay. OT: yung mga high end na power-on delay na nakita ko normally connected yung sa relay kapag nawalan nang power, may battery backup para i pullup yung relay. that way fail-safe than safe-fail. if gagamitan nang mcu. once nakasense na nang 220 dun pa lang mag oopen yung relay. yung contacts kasi yung iniingatan. (martin talaga ang daldal) |
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7_SeVeN_7
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« Reply #4 on: August 24, 2009, 07:23:42 PM » |
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bagong bago ang aircon ah! |
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E-Gizmo Mechatronix Central: www.e-gizmo.comTel #: (63)(2) 536-3378 Globe +63915-973-7691 Smart +63921-779-0748 Location MapYM: julie.egizmo aka Born2BeWired |
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insomartin
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« Reply #5 on: August 24, 2009, 07:29:53 PM » |
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oo nga eh! wala pang alikabok! naks.
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7_SeVeN_7
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« Reply #6 on: August 24, 2009, 07:32:55 PM » |
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daming pera ni sis marcela |
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E-Gizmo Mechatronix Central: www.e-gizmo.comTel #: (63)(2) 536-3378 Globe +63915-973-7691 Smart +63921-779-0748 Location MapYM: julie.egizmo aka Born2BeWired |
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krazeneth
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« Reply #7 on: August 24, 2009, 08:10:01 PM » |
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Talagang iingatan ni sir marcelino ang new aircon nya ah, ayaw pakainin ng sobra. hehe  |
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ahlburuto
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« Reply #8 on: August 24, 2009, 08:13:56 PM » |
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Pwedeng pwede yan.... Napakataas ng contact rating....
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7_SeVeN_7
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« Reply #9 on: August 24, 2009, 08:16:42 PM » |
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ate marce, saan ka nakabili ng ganyang relay? at how much?
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E-Gizmo Mechatronix Central: www.e-gizmo.comTel #: (63)(2) 536-3378 Globe +63915-973-7691 Smart +63921-779-0748 Location MapYM: julie.egizmo aka Born2BeWired |
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marcelino
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« Reply #10 on: August 24, 2009, 08:45:05 PM » |
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ate marce, saan ka nakabili ng ganyang relay? at how much?
sa sparkfun yan sis... matagal ko na yan binili the other year pa. sinabay ko nung bumili pa ako ng xbee modules... at last month pa yan!!! hehehe... prepared na ang enclosure!  pcb na lang. Zilog Inside yan... F0823 or F082 <--overkill!!! salamat naman at pwede. @mr nievera, noted yang normally closed. sige, try ko punta sa market namin dito. baka naman merong spdt. (or dpdt- mas mabuti) |
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piona
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« Reply #11 on: August 24, 2009, 09:12:04 PM » |
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Okay nga yon dapat normally close, during time delay lang mag-activate ang coil......
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Co0LėT♥
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« Reply #12 on: August 24, 2009, 09:26:44 PM » |
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sis suggest lang... insted of mag-parallel ka ng rc sa contact try mo yong varistor... mas effective yon lalo na sa heavy loads at tatagal ang life ng contact. 275volt S20 kalimitang gamit ng mga europeans. google na lang for proper ratings.
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Simpler designs are usually better.
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marcelino
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« Reply #13 on: August 24, 2009, 09:30:08 PM » |
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Okay nga yon dapat normally close, during time delay lang mag-activate ang coil......
kaso, normally open yang relay ko... spst pa. wala yan other terminal. sis suggest lang... insted of mag-parallel ka ng rc sa contact try mo yong varistor... mas effective yon lalo na sa heavy loads at tatagal ang life ng contact. 275volt S20 kalimitang gamit ng mga europeans. google na lang for proper ratings.
papano yan sis??? bago yan saakin ah... iniisip ko simpleng switch lang. as in on-off lang. through switching transistor. |
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"Don't take life seriously. After all, no one has ever come out of it alive. -Bugs Bunny"
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insomartin
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« Reply #14 on: August 24, 2009, 09:37:14 PM » |
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^ normally open nga!
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piona
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« Reply #15 on: August 24, 2009, 09:38:56 PM » |
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try nyo yong sa sasakyan sis, parang sa headlamp yata gamit nito, may nakita akong Bosch ang brand mga 40A yata yon at SPDT try nyo lang sa auto supply meron sila nito, parang 80 pesos lang yata ito.....
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love without accomplishing the laws, is complicated - sshrekk
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marcelino
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« Reply #16 on: August 24, 2009, 09:49:22 PM » |
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i see... RC contact protection deprives the DC arc during switching.... * kailangan pa pala yun. Akala ko, yung simpleng diode across inductive load ok na... *http://relays.tycoelectronics.com/appnotes/app_pdfs/13c3236.pdf so, papano yung varistor sis? papano ko pipili ng varistor na ikakabit? pwede ba yung varistor sa mga atx? eto pwede na to?  try nyo yong sa sasakyan sis, parang sa headlamp yata gamit nito, may nakita akong Bosch ang brand mga 40A yata yon at SPDT try nyo lang sa auto supply meron sila nito, parang 80 pesos lang yata ito.....
sige try ko punta kapag di ako nakakita sa electronic shop. mounting kasi ang problema ko kapag yung sa sasakyan... madami nga high current pero mga low voltage naman. ^ normally open nga!
kaya nga kinukunsider ko yung normally closed na relay... tama nga naman... during initialization, bubukas kaagad! |
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piona
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« Reply #17 on: August 24, 2009, 10:11:01 PM » |
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dapat sis hindi naka PCB mount yong contact pins, malaking wire na ang kailangan nito dapat nakatihaya na ito tapos direct solder yong wire sa contact pin, okay nga yong sa sasakyan malalapad ang pins nito....sa hi current kadalasang problema yong mapipick-up ng circuit ang sparks o transients during switching, mas mabuti isolated yong relay sa circuit.
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marcelino
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« Reply #18 on: August 24, 2009, 10:14:23 PM » |
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dapat sis hindi naka PCB mount yong contact pins, malaking wire na ang kailangan nito dapat nakatihaya na ito tapos direct solder yong wire sa contact pin, okay nga yong sa sasakyan malalapad ang pins nito....sa hi current kadalasang problema yong mapipick-up ng circuit ang sparks o transients during switching, mas mabuti isolated yong relay sa circuit.
noted... kaso yang relay ko ay PCB mount...  but anyway, di naman nga yan ang gagamitin ko if incase may makita akong relay bukas. |
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Co0LėT♥
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« Reply #19 on: August 24, 2009, 10:16:12 PM » |
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ganyan nga ang varistor... iba iba kulay merong blue, red, green........ Base ito sa procedure namin... Tips on Applying Relays (summary na ito) One of the most common problems in applying relays is the assumption that a relay contact can switch its rated current no matter what type of load it sees. Nothing could be more disastrous. High in-rush currents, high induced back EMF's, and the like can erode, or even weld, contact to the point where life is cut drastically. To better understand the effect of various loads, a brief discussion of each load type is given. Motors draw high in-rush current because at standstill the input impedance is very low. As current is drawn, a torque is developed due to the interaction of the current and the magnetic field. When the motor starts to rotate, it develops an internal EMF which tends to reduce the current. Depending on the mechanical load, the starting time may be very short or very long causing the in-rush current to persist for the same duration. Upon turn-off, the contacts will receive a high inductive voltage kick that tends to produce an arc that can cause contact erosion. The relay should be designed to have: a. Heavy contact force both closing and opening. (This one need good power supply) b. Minimum contact bounce. c. Weld-breaking contact motion such as rocking or shearing motions. d. Some armature travel before the actual contact separation. |
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