Telecom site chakna hi telecom network thisen anga ngaih a ni a, battery erawh chu a thisen dahna hmun anga ngaih a ni a, hei hian network kalphung mumal tak a humhim a ni. Mahse, battery enkawl hi thil harsa tak a ni fo. Centralized procurement hnuah pawh thil siamtute chuan man an tihhniam chhunzawm zel avangin battery quality pawh 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 enkawl hi maintenance personnel-te tan chuan lu na tak a ni. He thuziak hian battery chhiat chhan berte thlirletna a pe a, chu chu mi dangte tâna hmanraw ṭangkai tak a ni thei a ni.
1. On-Site Power Equipment hman dan tlangpui
On-site power equipment hi international brand lar tak atanga 40kVA UPS unit pahnih hmanga siam a ni. Battery te hi kum 2016 khan dah a ni a, a hnuaia mi hi a chipchiar zawkin tarlan a ni:
UPS chungchang hriat tur |
Battery chungchang hriat tur |
Brand & Model: International Brand UPS UL33 hmanga siam a ni |
Brand leh Model: 12V 100Ah a ni |
Configuration: 40 kVA, parallel system-ah unit 2, pakhatin load 5 kW vel a nei |
Battery awm zat: Group khatah cell 30, group 2, a vaiin cell 60 |
Commissioning Ni: Kum 2006 (kum 10 chhung a thawh tawh) |
Commissioning Date: 2016 (kum 5 chhung a thawk tawh) |
June 6th khan UPS siamtu hian routine maintenance an nei a, AC leh DC capacitor (kum 5 chhung service) leh fan te an thlak a ni. Battery discharge testing (minute 20) chhungin battery discharge performance a chhe hle tih hmuhchhuah a ni. Discharge current chu 16A a ni a, minute 10 vel discharge hnuah cell engemawzat voltage chu 11.6V ah a tlahniam a, mahse battery bulging hmuh tur a awm lo.
Inspection neih chhung hian UPS battery group pahnihte 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 (maintenance standard aia sang) thlenga sang a ni. Chuvang chuan a tirah chuan UPS siamtu engineer-te thlak DC filter capacitor-te chu a chhia a, hei vang hian UPS DC bus-ah ripple voltage a tam lutuk a, battery bulging a awm niin an ring.
2. On-Site a hlawhchhamna dinhmun
July 22 khan Research Institute atanga team te chuan branch office pakhatah himna endikna an nei a. Building pakhat chhawng 5-a UPS system-te battery chu nasa takin a bulh tih an hmuchhuak a. Grid atanga power tlakchhamna a awm a nih chuan battery te hi a discharge tha lo mai thei a, accident a thlen thei tih an hlau hle. Chuvang chuan, branch enkawltute chu a tuk chawhnu lamah mi pathumte nen hmuna chhui chianna leh buaina chinfelna hun inzawmkhawm ruahman turin thil siamtu engineer-te biak nghal turin an rawt nghal a ni.
12V Battery a bulging a ni
July 23 chawhnu lamah chuan party pathumte chu on-site an thleng a. Enfiah a nih chuan UPS unit pahnih hi a thawk tha hle tih hmuhchhuah a ni a, battery-te tan float voltage 404V vel (set parameters nena inmil) a ni. A siamtu engineer te chuan Fluke 287C multimeter (high accuracy) hmangin battery charging ripple voltage an teh a, chu chu 0.439V vel a ni. Fluke 376 clamp meter (a dikna hniam zawk) chu 0.4V vel a ni. Instrument pahnih atanga result chu a inang vek a, hmanrua atana ripple voltage range pangngai (a tlangpuiin bus voltage 1% aia tlem) chhungah a tla a ni. Hei hian DC capacitor thlak tawhte chu compliant leh function normal tak a nih thu a tarlang. Chuvangin, a hmaa rinhlelh theory, capacitor thlak a nih avangin ripple voltage a tam lutuk a, battery bulging a awm tih chu a paih chhuak ta a ni.
Multimeter: 0.439V a ni
Clamp meter: 0.4V vel a ni
UPS system-a historical records thlirletnaah chuan, June 6 khan UPS unit pahnihte hian minute 15 chhung battery discharge test an nei tawh tih a tarlang. Main power switch an siam that hnuah minute 6 chhung equalized charging an nei a, chumi hnuah minute 14 chhung battery discharge test chu siamtu engineer-te chuan an ti leh a ni. Test zawhah UPS system hian darkar 12 chhunga equalized charge vawi li a zawnin automatic-in a ti tan a, phase tin chu minute 1 inkar a inthen a, June 9 zing dar 5:32-ah a tawp a, chuta ṭang chuan battery-te chu float charge mode-ah an awm ta a ni.
UPS battery settings hmasa ber enfiah leh chuan a hnuaia mite hi kan hmuchhuak a ni:
Battery dam chhung hi thla 48 (kum 4) atan an dah a, mahse 12V battery dam rei zawng tak tak chu kum 5 a ni tur a ni.
Equalized charging chu 'enabled.' ah dah a ni.
Charge current limit chu 10A-ah dah a ni.
Equalized charging-a inthlakna tur trigger chu 1A-ah dah a ni (float charge current-in 1A a pelh chuan system chuan equalized charging-ah automatic-in a inthlak ang, he model-a default value chu 0.03C10~0.05C10 ni mah se, chu chu float charge current 3-5A a thlen chuan equalized charging a trigger tihna a ni. Mahse, chhan hriat loh avangin siamtuin a enkawl dan personnel te chuan hei hi 0.01C10 ah an siamrem tawh a, chu chu float charge current 1A a thlen chuan equalized charging a trigger dawn tihna a ni).
Equalized charging protection time chu minute 720-ah dah a ni (equalized charging chu darkar 12 hnuah automatic-in a tawp ang).
3. Hlawhchhamna chhante thlirletna
A chunga kan sawi ang hian a hlawhchham dan chu hetiang hian kan zirchiang thei a ni.
He UPS system battery group pahnih hi kum 4 chhung zet hman a ni tawh a (12V battery service life hi kum 5 a ni), battery capacity pawh nasa takin a tlahniam tawh bawk. Mahse, a chhiat hma chuan battery pawn lam lan dan chu a pangngai a, bulging chhinchhiahna a awm lo. January 30, 2019 (he ni hmaa record awmte chu tihfai a ni) June 6, 2020 thlenga UPS historical records enfiah leh a nih chuan UPS system hian equalized charging vawi 12 a ti tawh a, a rei ber chu minute 15 aia rei lo a ni. Hei hian UPS system-a maintenance hmaa equalized charging duration set chu a rei lo hle tih a tilang a, minute 15 chauh a ni a, UPS system-in hun rei lote chhunga equalized charging a neih chuan battery te chu a bulge lo ang.
Maintenance leh capacitor thlak hnuah UPS system chu restart leh a ni. Control logic chuan battery chu connect thar a nih thu a hriat chian avangin minute 6 chhung equalized charging a intan a, chutah chuan float charge-ah a inthlak leh ta a ni. Mahse, a hnu lama minute 14 chhung discharge test an neih hnuah UPS system chuan battery te chu fully recharge turin equalized charging chu automatic in a start ta a ni. Battery te hi kum 4 chhung hman a nih avangin an internal charge retention capability a chhe tawh a, float charge current chu 1A aia tam a nih avangin UPS system-a 1A equalized charging threshold set chu a tichhuak ta a ni (he model-a default value chu equalized charging trigger turin 3~5A float charge current a ni a, mahse eng emaw chhan vangin maintenance personnel-te chuan hei hi 1A-ah an siam danglam tawh a ni). Hei hian UPS system chuan equalized charging chu a titawp leh ta a, a tawpah chuan internal battery open circuit chuan a titawp ta a ni (Chutiang a nih loh chuan UPS system hian equalized charging repeated chhunzawm zel a ni ang a, chu chuan battery group chu a kang thei a ni). Hemi hun chhung hian battery te hi darkar 48 chhungin continuous equalized charging cycle pali an nei a (cycle tin hian darkar 12 danah minute 1 chauh an chawl a, chutah chuan equalized charging an tan leh thin). Chutiang hun rei tak equalized charging hnuah chuan a tawpah chuan battery te chu a bulging ta a, venting valve te pawh a deformed ta a ni.
4. Tawpna
A chunga kan thil hmuhchhuah leh kan zirchianna atang hian he UPS system-a battery a chhiat chhante chu hetiang hi a ni:
A chhan dik tak chu UPS system-a charging parameters setting dik lo vang a ni a, hei vang hian darkar 48 chhung equalized charging chhunzawm zel a ni a, cycle tin inkarah minute 1 chauh a awm a ni. Battery thar pawh hian hetiang hun rei tak leh nasa taka equalized charging hi a tuar thei lo vang a, hei hian he thil thlengah hian battery bulging a tichhe thei 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 dangte chuan he interval hi ni 7-ah an set tlangpui), hei vang hian multiple equalized charging cycle chhunzawm zel a ni.
Battery-te hi kum (kum 4 service-a an awm) avangin an performance a tlahniam tawh a, discharge capacity a tlahniam a, charge retention a ṭha lo bawk. June 6 hma khan equalized-to-float-charge conversion current threshold chu a chhan awm lovin a hniam (100Ah battery tan 1A chauh) an siam a. UPS system default value chu 3~5A a ni a, chutih rualin maintenance personnel te chuan sawifiah theih lohvin 1A ah an siam danglam ta a ni.
UPS system hi kum 14 chhung zet hman a ni tawh a, a decommissioning kum aiin a tam tawh hle a, hei vang hian tehna dik lo awm chu pumpelh theih a ni lo. Heng errors te hian current detection dik lo vangin system hian equalized charging a initiate leh fo thei a ni.
Vanneihthlak takin battery cell pakhata open circuit a awm avangin UPS system chuan equalized charging palina hnuah pawh equalized charging cycle repeated chu a chhunzawm thei lo a, chu chuan battery-te kang thei tur chu a pumpelh ta a ni.
5. Hlawhchhamna siamhatna tur ruahmanna
Remedial measures-ah hian kawng hnih a awm a:
A hmasa berin UPS battery charging parameters chu hun eng emaw chen siam danglam rawh:
UPS system ah equalized charging setting kha disable rawh.
Float charge atanga equalized charging-a 3A-a inthlakna tur trigger current chu siamrem rawh (3A hi a la hniam deuh a, default minimum chu 3A a nih avangin, mahse a hmain 1A-ah dah a ni).
Equalized charging protection time chu darkar 1 (a hmaa darkar 12-a dah) ah siamrem rawh.
Pahnihnaah chuan, branch office chuan battery group pahnih chu backup battery hmangin a thlak a, mahse backup battery te hian 50 Ah chauh an pe thei a, chuvangin hun eng emaw chen atana emergency atan chauh hman theih a ni. Nakin lawkah UPS system aṭanga load hi power source dangah transfer tum a ni a, hei hian power supply himna chungchangah uluk taka chinfel a ni ang.
Operator hian kum tin UPS system maintenance service-ah sum tam tak a hmang a, chutih rualin maintenance personnel-te ngaihsak lohna leh fimkhur lohna avang hian UPS system default value pawh an siam danglam sual a, chu chu rintlak tak a ni tak zet a ni. UPS siamtute hian an thil siamte enkawlna hi uluk taka ngaihtuah a, nakin lawkah hetiang thil tihsual bulpui berte tih loh nan a tha a, chu chuan an enkawlna service quality a tisang ang. Hetihlai hian operator pawhin UPS siamtuin a hnu lama maintenance service a pekte pawh ngun zawka ngaihven a, UPS system him leh rintlak taka kalpui zelna tur evaluation system siam turin rawtna a siam bawk.
