Kwi-MCCB, umthamo wokuqhekeka kwesekethe emfutshane olinganisiweyo ubhekisa kumthamo wokuqhekeka phantsi kweemeko ezithile. Emva kwenkqubo yovavanyo echaziweyo, kuyimfuneko ukuqwalasela ukuba i-circuit breaker iyaqhubeka nokuthwala umbane wayo olinganisiweyo. Ukuze kuhlangatyezwane neemfuno zabasebenzisi abahlukeneyo, abavelisi abaninzi be-circuit breaker ngoku bahlula umthamo wokuqhekeka kwesekethe emfutshane yombane ofanayo we-shell rating current ibe ngamanqanaba ahlukeneyo, kwaye abasebenzisi banokukhetha i-circuit breaker efanelekileyo ngokweemfuno zabo ukusuka kwi-minimum ukuya kwi-maximum current breakers. Ziqhelekile kwaye zifumaneka phantse kuyo nayiphi na isakhiwo okanye isakhiwo kangangokuba zihlala zithathwa lula. Sekunjalo, zidlala indima ebalulekileyo kwinkqubo yethu yegridi yombane kwaye kufuneka zigcinwe ukuze zihambelane nemigangatho yokhuseleko yamva nje.
CJ: Ikhowudi yeshishini
M: Isixhobo sokwaphula isekethe esibunjiweyo
1: Inombolo yoYilo
□:Umlinganiselo wangoku wesakhelo
□:Umthamo wokuphuka uphawu lwekhowudi/S lubonisa uhlobo oluqhelekileyo (u-S unokushiywa) u-H ubonisa uhlobo oluphezulu
Qaphela: Kukho iintlobo ezine ze-neutral pole (i-N pole) kwimveliso yezigaba ezine. I-neutral pole yohlobo A ayinayo i-over-current tripping element, ihlala ivuliwe, kwaye ayivulwa okanye icinywe kunye nezinye iipali ezintathu.
Ipali engathathi cala yohlobo B ayinayo into yokukhuhla ngamandla angaphezu kombane, kwaye ivulwa okanye icinywe kunye nezinye iipali ezintathu (ipali engathathi cala ivulwa ngaphambi kokuba icinywe) Ipali engathathi cala yohlobo C inento yokukhuhla ngamandla angaphezu kombane, kwaye ivulwa okanye icinywe kunye nezinye iipali ezintathu (ipali engathathi cala ivulwa ngaphambi kokuba icinywe) Ipali engathathi cala yohlobo D inento yokukhuhla ngamandla angaphezu kombane, ihlala ivulwa kwaye ayivulwa okanye icinywe kunye nezinye iipali ezintathu.
| Igama lesixhobo | Ukukhutshwa nge-elektroniki | Ukukhululwa okudityanisiweyo | ||||||
| Uqhagamshelwano oluncedisayo, ukukhululwa kwe-voltage phantsi, uqhagamshelwano lwe-alam | 287 | 378 | ||||||
| Iiseti ezimbini zoqhagamshelwano ezincedisayo, unxibelelwano lwe-alamu | 268 | 368 | ||||||
| Ukukhululwa kwe-shunt, unxibelelwano lwe-alamu, unxibelelwano oluncedisayo | 238 | 348 | ||||||
| Phantsi kokukhululwa kwe-voltage, uqhagamshelwano lwe-alamu | 248 | 338 | ||||||
| Unxibelelwano lwe-alamu yoqhagamshelwano oluncedisayo | 228 | 328 | ||||||
| I-alamu yokukhupha i-shunt inxibelelana nayo | 218 | 318 | ||||||
| Ukukhululwa kombane ongaphantsi kombane oncedisayo | 270 | 370 | ||||||
| Iiseti ezimbini zoqhagamshelwano ezincedisayo | 260 | 360 | ||||||
| Ukukhululwa kwe-Shunt ukukhutshwa kwe-under-voltage | 250 | 350 | ||||||
| Uqhagamshelwano oluncedisayo lokukhulula i-Shunt | 240 | 340 | ||||||
| Ukukhululwa kwe-Under-voltage | 230 | 330 | ||||||
| Unxibelelwano oluncedisayo | 220 | 320 | ||||||
| Ukukhululwa kwe-Shunt | 210 | 310 | ||||||
| Unxibelelwano lwe-alamu | 208 | 308 | ||||||
| Akukho nto yokongeza | 200 | 300 | ||||||
| 1 Ixabiso elilinganisiweyo lee-circuit breakers | ||||||||
| Imodeli | Imax (A) | Iinkcukacha (A) | Ixabiso leVoltage yokusebenza (V) | I-Voltage yoKhuseleko oluLinganisiweyo (V) | I-Icu (kA) | Ii-Ics (kA) | Inani leeNtsika (P) | Umgama we-Arcing (mm) |
| CJMM1-63S | 63 | 6,10,16,20 25,32,40, 50,63 | 400 | 500 | 10* | 5* | 3 | ≤50 |
| CJMM1-63H | 63 | 400 | 500 | 15* | 10* | 3,4 | ||
| CJMM1-100S | 100 | 16,20,25,32 40,50,63, 80,100 | 690 | 800 | 35/10 | 22/5 | 3 | ≤50 |
| CJMM1-100H | 100 | 400 | 800 | 50 | 35 | 2,3,4 | ||
| CJMM1-225S | 225 | 100,125, 160,180, 200,225 | 690 | 800 | 35/10 | 25/5 | 3 | ≤50 |
| CJMM1-225H | 225 | 400 | 800 | 50 | 35 | 2,3,4 | ||
| CJMM1-400S | 400 | 225,250, 315,350, 400 | 690 | 800 | 50/15 | 35/8 | 3,4 | ≤100 |
| CJMM1-400H | 400 | 400 | 800 | 65 | 35 | 3 | ||
| CJMM1-630S | 630 | 400,500, 630 | 690 | 800 | 50/15 | 35/8 | 3,4 | ≤100 |
| CJMM1-630H | 630 | 400 | 800 | 65 | 45 | 3 | ||
| Qaphela: Xa iiparameter zovavanyo ze-400V, i-6A ngaphandle kokukhululwa kokufudumeza | ||||||||
| 2 Uphawu lokusebenza oluchaseneyo lokwaphulwa kwexesha xa ipali nganye yokukhululwa kombane ogqithisileyo ivuliwe ngaxeshanye | ||||||||
| Into yovavanyo yangoku (I/In) | Indawo yexesha lovavanyo | Imeko yokuqala | ||||||
| Umbane ongakhubekiyo oyi-1.05In | 2h(n>63A),1h(n<63A) | Imeko yokubanda | ||||||
| Umjikelo wangoku ojikelezayo oyi-1.3In | 2h(n>63A),1h(n<63A) | Qhubeka ngoko nangoko emva kovavanyo lweNombolo 1 | ||||||
| 3. Uphawu lokusebenza oluchaseneyo lokwaphulwa kwexesha xa ipali nganye ye-over- ukukhutshwa kwangoku kokukhusela imoto kuvuliwe ngaxeshanye. | ||||||||
| Ukuseta Ixesha langoku eliqhelekileyo Imeko yokuqala | Phawula | |||||||
| 1.0In | >iiyure ezi-2 | Ilizwe elibandayo | ||||||
| 1.2In | ≤2 iiyure | Kuqhutyelwe phambili kwangoko emva kovavanyo lweNombolo yoku-1 | ||||||
| 1.5In | ≤4min | Ilizwe elibandayo | 10≤Kwi≤225 | |||||
| ≤8min | Ilizwe elibandayo | 225≤Kwi-≤630 | ||||||
| 7.2In | 4s≤T≤10s | Ilizwe elibandayo | 10≤Kwi≤225 | |||||
| 6s≤T≤20s | Ilizwe elibandayo | 225≤Kwi-≤630 | ||||||
| 4. Uphawu lokusebenza ngoko nangoko lwe-circuit breaker yokusasazwa kwamandla kufuneka lubekwe njenge-10in + 20%, kwaye eyom-circuit breaker yokukhusela imoto kufuneka ibekwe njenge-12ln ± 20% |