A ziaktu: Site Editor Publish hun: 2024-10-17 A bul tanna: Hmun
Telecom site power hi telecom network thisen anga ngaih a ni a, battery chu a thisen dahna anga ngaih a ni a, network kalphung mumal tak a humhim thung. Mahse, battery enkawl hi thil harsa tak a ni fo. Centralized procurement hnua man tlawm zawka manufacturer-te nen chuan battery quality chu nasa takin a tlahniam a ni. Kum tin telecom power system chhiatna 70% aia tam chu battery chungchangah a ni a, hei vang hian battery maintenance hi maintenance personnel tan lu natna a ni. He thuziak hian battery a chhiat chhan ber berte thlirletna a pe a, chu chu mi dangte tan chuan reference angkai tak a ni thei.
1. On-site power hmanrua thlirletna .
On-site power equipment-ah hian international brand lar tak aṭanga 40kva UPS unit pahnih a awm a ni. Battery te hi kum 2016 khan install a ni a, a hnuaia tarlan te hi chipchiar takin tarlan a ni:
UPS chungchang hriat tur . | Battery chungchang hriat tur . |
Brand & Model: International Brand UPS UL33 . | A rilru a buai em em a. 12V 100AH |
Configuration: 40 kVA, unit 2 parallel system-ah dah a ni a, pakhat zel chu 5 kW vel a ni. | Battery awm zat: Group khatah cell 30, group 2, a vaiin cell 60 |
Commissioning ni: 2006 (kum 10 chhung rawngbawlna) a ni. | Commissioning ni: 2016 (kum 5 chhung rawngbawlna) a ni. |
June 6th khan UPS siamtu hian routine maintenance an nei a, AC leh DC capacitor (kum 5 chhung service) leh fans te an thlak a ni. Battery discharge testing neih chhung hian (minute 20 chhung) battery discharge performance a tha lo tih hmuhchhuah a ni. Discharge current chu 16a a ni a, minute 10 chhung discharge hnuah cell engemaw zat voltage chu 11.6V-ah a tla thla a, mahse battery bulging erawh hmuh a ni lo.
UPS battery group pahnih hian inspection neih chhung hian bulging issue an nei tih hmuhchhuah a ni. Multimeter hmangin battery charging ripple voltage (AC setting hmanga teh) an teh a, chu chu 7V aia sang (thil maintenance standard aia tam) a ni. Chuvang chuan a tirah chuan UPS siamtu engineer-te thlak DC filter capacitor-te chu an chhia niin an ring a, hei hian UPS DC bus-ah ripple voltage a tam lutuk a, hei vang hian battery bulging a thlen a ni.
2. On-site failure dinhmun .
July 22 khan Research Institute atanga team te chuan branch office-ah safety inspection an nei a. Building pakhata 5th floor-a UPS system-a battery awmte chu a bul tanna nasa tak a ni tih an hmuchhuak a. Grid atanga power outage awm ta se, battery te chu a chhuak tha lo mai thei a, hei hian accident a thlen thei a ni. Chuvang chuan branch maintenance personnel-te chuan a tuk chawhnu lamah party pathumte nen joint on-site investigation leh troubleshooting session buatsaih turin siamtu engineer-te chu biak turin an rawt nghal a ni.
Bulging hi 12V battery a ni a.
July 23 chawhnu lamah chuan party pathumte chu an rawn thleng a. Inspection a nih chuan UPS unit pahnih hi a tlangpuiin a thawk thei tih hmuhchhuah a ni a, battery atan float voltage 404V vel a awm (Set parameters nen a inmil). A siamtu engineer-te chuan Fluke 287C multimeter (high accuracy) hmangin battery charging ripple voltage an teh a, hei hi 0.439V vel a ni. A fluke 376 clamp meter (a dikna hniam zawk) chu 0.4V vel a ni. Instrument pahnih atanga result chu a inang a, hmanrua atan typical ripple voltage range chhungah a tla a (a tlangpuiin bus voltage 1% aia tlem). Hei hian DC capacitor thlak danglamte chu an compliant a, an function normal tih a tilang a ni. Chuvangin, a hmaa rinhlelh tawh theory chuan capacitor thlak danglamna hian ripple voltage a thlen tam lutuk a, battery bulging pawh a awm lo.
Multimeter: 0.439V a ni.
Clamp meter: 0.4V vel a ni.
UPS system-a a chanchin ziakte thlirletna chuan, June 6 khan UPS unit pahnihte chu minute 15 chhung battery discharge test an nei tawh tih a tarlang. Main power switch an siamṭhat hnuah minute 6 chhunga equalized charging an nei a, chumi hnuah an siamtu engineer-te chuan minute 14 chhunga battery discharge test an nei leh a ni. Test zawhah UPS system chuan darkar 12 chhunga equalized charges pali a zawnin automatic-in a intan a, phase tin chu minute 1 chhunga inthenin, June 9 zing dar 5:32-ah a tawp a, chuta ṭang chuan battery te chu float charge mode-ah a awm reng a ni.
UPS battery settings original te chu a hnuaia mi ang hian a hnuaia mi ang hian a awm tih a hriat theih.
Battery life chu thla 48 (kum 4) atan dah a ni a, mahse 12V battery dam rei zawng chu kum 5 a ni tur a ni.
Equalized charging chu 'enabled.' ah an dah a.
Charge current limit chu 10A ah dah a ni.
Equalized charging-a inthlakna tur trigger chu 1A-ah an dah a (system chuan float charge current chu 1A aia tam a nih chuan equalized charging-ah a inthlak nghal ang a, he model-a default value chu 0.03C10~0.05C10 ni mah se, equalized charging chu float charge current 3-5A a thlen hunah a trigger tihna a ni. Mahse, chhan hriat loh, a siamtuin a siamrem a, hei hi a awmzia hriat loh a ni. float charge current 1a) a thlen chuan a trigger ang.
Equalized charging protection time chu minute 720-ah dah a ni (equalized charging chu darkar 12 hnuah automatic-in a tawp ang).
3. A hlawhchhamna chhan hrang hrang thlirletna .
A chunga thil awmdan aang hian failure process chu hetiang hian kan zirchiang thei ang:
He UPS system-a battery group pahnih hi kum 4 chhung zet hman a ni tawh a (12V battery-a service life chu kum 5 a ni tawh), battery capacity pawh nasa takin a tlahniam tawh bawk. Mahse, a hlawhchham hma chuan battery pawn lam a rawn lang chu a pangngai a, bulging chhinchhiahna a awm lo. January 30, 2019 atanga June 6, 2020 thlenga UPS Historical Records (he ni hmaa record) atanga thlirletna dang chuan UPS system hian equalized charging 12 a ti tawh tih a tarlang a, a hun rei ber chu minute 15 aia rei lo a ni. Hei hian Maintenance hmaa UPS system-a equalized charging duration set chu a tawi deuh a, minute 15 chauh a ni a, UPS system-a hun rei lote chhunga equalized charging hian battery a ti chhe dawn lo tih a tilang bawk.
Maintenance leh capacitor thlak hnuah UPS system chu restart a ni. Control logic chuan battery chu connect thar a nih thu a sawi a, chuvang chuan minute 6 chhunga equalized charging a tan a, chutah chuan float charge-ah a inthlak ta a ni. Mahse, a hnua minute 14 chhunga discharge test an neih hnuah UPS system chuan battery te chu a taka recharge theih turin charging chu a equalized nghal vek a ni. Battery kum 4 chhung hman a nih avangin an internal charge retention capability chu a chhe tawh a, hei hian float charge current chu 1A aia tam a thlen a, hei hian UPS system-a 1A equalized charging threshold set chu a tichhuak a ni (he model-a default value chu 3~5a float charge current equalized charging trigger turin a ni a, mahse eng emaw chhan vangin, maintenance personnel-te chuan 1a-ah an siam danglam tawh a ni). Hei hian UPS system chu a tawpah internal battery open circuit a tihtawp hma loh chuan equalized charging chu a ti tan leh ta a ni (chutiang chuan UPS system chuan repeated equalized charging a chhunzawm leh ang a, chu chuan battery group-in kangmei a chhuah tir thei ang). Hemi hun chhung hian battery te hian darkar 48 chhungin continuous equalized charging cycle pali an nei a (cycle tin hian equalized charging resuming hma darkar 12 danah minute 1 chauh an chawlhsan thin). Chutiang hun rei tak equalized charging an neih hnuah chuan a tawpah chuan battery te chu bulging an nei ta a, venting valve te pawh chu a chhe ta vek a ni.
4. Tawpna
A chunga kan hmuh leh thlirletna atang hian he UPS system-a battery a chhiat chhan hi hetiang hi a ni:
Direct cause chu UPS system-a charging parameters-a dik lo taka setting a nih avangin, cycle tin inkar minute 1 chhung chauh awmin darkar 48 chhung continuous equalized charging a awm a ni. Battery thar pawh hian hetiang hun rei tak leh nasa taka equalized charging hi a tuar thei dawn lo a, hei hian he thubuaiah hian battery bulging failure a thlen dawn a ni.
UPS system model hi design hmasa ber a ni a, functional limitation a nei bawk. He UPS model hlui zawk (kum 20 kalta a design) hian ' equalized charging interval protection time' setting a nei lo (Brand dang chuan he interval hi ni 7-ah an dah tlangpui), chu chuan continuous multiple equalized charging cycle a siam a ni.
Battery-te hnathawh dan chu kum (kum 4 chhung service-a thawk) a nih avangin a tlahniam a, discharge capacity a tlahniam a, charge retention ṭha lo a awm bawk. June 6 hma khan equalized-to-float-charge conversion current threshold chu a chhan awm lovin a hniam hle a (10AH battery atan 1A chauh). UPS system default value chu 3~5A a ni a, chutih rualin maintenance personnel te chuan sawifiah theih lohvin 1A ah an siam danglam a ni.
UPS system hi kum 14 chhung zet a lo thawk tawh a, a kum tihtlem a nih tawh avangin a thawk tawh lo hle a, measurement error pawh pumpelh theih loh a ni. Heng tihsualte hian system chu current detection dik lo a nih avangin equalized charging a tichhuak fo thei a ni.
Vanneihthlak takin battery cell pakhata open circuit chuan UPS system chu equalized charging pali hnuah repeated equalized charging cycles chu a chhunzawm thei lo a, chu chuan battery-te’n mei an man theihna tur a veng thei a ni.
5. A hlawhchhamna tur siamthatna tur ruahmanna siam .
Remedial measures-ah hian kawng hnih a awm a:
A hmasa berin UPS battery charging parameters te chu hun engemaw chen atan siam danglam rawh:
UPS system-a equalized charging setting kha disable rawh.
Float charge atanga equalized charging a 3a a switch theihna tur trigger current chu adjust la (3A chu a la hniam deuh nachungin, default minimum chu 3A a nih avangin, mahse a hmain 1A ah dah a ni).
Equalized charging protection hun chu darkar 1 (a hmain darkar 12 thleng) siamrem rawh.
Pahnihnaah chuan branch office chuan battery group pahnih hi backup battery hmangin an thlak a, mahse backup battery hian AH 50 chauh an nei thei a, chuvangin hun eng emaw chen atana emergency atana hman theih chauh a ni. Nakin lawkah UPS system atanga load hi power source dang hnena transfer tum a ni a, power supply himna chungchanga harsatna awmte chu uluk taka chinfel a ni ang.
Operator hian kum tin UPS system atana maintenance services atan sum tam tak a hmang a, chutih rualin maintenance personnel-te ngaihsak lohna leh fimkhur lohna avang hian UPS system-a default value pawh an siam danglam palh a, chu chu rin loh tak a ni tak zet a ni. UPS siamtu hian an thil siamte enkawlna hi uluk taka ngaihtuah a, nakin lawkah hetiang tihsual bulpui neih loh a, an maintenance service quality tihsan a tha. Hetihlai hian, operator chuan UPS siamtuin a hnu lama maintenance service a pekte chu ngun zawka ngaihtuah a, UPS system him leh rintlak taka kalpui zelna tur evaluation system siam turin rawtna siam a ni bawk.
