{"id":3409,"date":"2026-03-24T09:00:00","date_gmt":"2026-03-24T01:00:00","guid":{"rendered":"https:\/\/eqsvq3fzct.wpdns.site\/blog\/advanced-protection-of-800v-mccb-electronic-jcr3hm-rcd-with-built-in-lsig-trip-unit\/"},"modified":"2026-10-20T10:37:31","modified_gmt":"2026-10-20T02:37:31","slug":"800v-%eb%a7%a5%ec%8a%a4%ec%bb%a4%eb%b2%84%eb%a6%ac-%ec%a0%84%ec%9e%90-jcr3hm-rcd-%eb%82%b4%ec%9e%a5%eb%90%9c-lsig-%ed%8a%b8%eb%a6%ac%ed%94%84-%ec%9c%a0%eb%8b%9b-%ed%8f%ac%ed%95%a8","status":"publish","type":"post","link":"https:\/\/w9-group.com\/ko\/blog\/advanced-protection-of-800v-mccb-electronic-jcr3hm-rcd-with-built-in-lsig-trip-unit\/","title":{"rendered":"JCR3HM RCCB \ub300 LSIG MCCB: \ubcf4\ud638 \uae30\ub2a5 \ubc0f \ub4f1\uae09 \uc81c\ud55c"},"content":{"rendered":"

\uae30\uc874\uc758 \uc81c\ud488\uba85\uc740 \ub450 \uac00\uc9c0 \uc11c\ub85c \ub2e4\ub978 \uc7a5\uce58 \uc0ac\uc591\uc744 \uacb0\ud569\ud55c \uac83\uc73c\ub85c, 800 V \uc804\uc790\uc2dd MCCB(LSIG \uae30\ub2a5 \ud3ec\ud568)\uc640 JCR3HM RCD\ub97c \uc758\ubbf8\ud569\ub2c8\ub2e4. \uc774\ub4e4\uc740 \ud558\ub098\uc758 \uc81c\ud488\uc73c\ub85c \ucde8\uae09\ub418\uc5b4\uc11c\ub294 \uc548 \ub429\ub2c8\ub2e4. \ud604\uc7ac\uc758 JCR3HM \ub4f1\uc7ac \uc790\ub8cc\ub294 RCCB<\/a> \uc794\ub958\uc804\ub958 \ubcf4\ud638\ub97c \uc704\ud55c \uac83\uc73c\ub85c, \ubcc4\ub3c4\uc758 \uc870\uc815\ub41c \uacfc\uc804\ub958 \ubcf4\ud638\uac00 \ud544\uc694\ud569\ub2c8\ub2e4.<\/p>\n

The JCR3HM \ub204\uc804\ucc28\ub2e8\uae30<\/strong> \ud45c\uc5d0\ub294 2\uadf9\/4\uadf9, A\ud615 \ub610\ub294 AC\ud615, 30\/100\/300 mA \uc635\uc158\uacfc 25~100 A\uc758 \uc815\uaca9\uc804\ub958 \uc120\ud0dd\uc9c0\uac00 \ub098\uc5f4\ub418\uc5b4 \uc788\uc2b5\ub2c8\ub2e4. 2\uadf9\uc6a9\uc73c\ub85c\ub294 230\/240 V, 4\uadf9\uc6a9\uc73c\ub85c\ub294 400\/415 V\uac00 \uae30\uc7ac\ub418\uc5b4 \uc788\uc2b5\ub2c8\ub2e4. \ub610\ud55c 800 V LSIG MCCB \uc815\uaca9\uc740 \uba85\uc2dc\ub418\uc5b4 \uc788\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4.<\/p>\n

What JCR3HM does<\/h2>\n

It detects residual current within the selected waveform and sensitivity scope. An RCCB under IEC 61008-1 has no integral overcurrent protection<\/strong>. Its current-carrying rating must therefore be coordinated with the circuit’s MCB or fuse and the manufacturer’s fault-protection arrangement.<\/p>\n

Choose waveform type from the connected load and sensitivity from the protection objective and installation rules. A 300 mA setting cannot simply replace required 30 mA additional protection to avoid trips.<\/p>\n

\ucc28\uc774\uc810\uc744 \uac80\ud1a0\ud558\uc2ed\uc2dc\uc624 RCBO \ubc0f RCCB \ubcf4\ud638<\/a> \uacfc\ubd80\ud558 \ubc0f \ub204\uc804 \uae30\ub2a5\uc744 \ud560\ub2f9\ud558\uae30 \uc804\uc5d0.<\/p>\n

What an LSIG MCCB does<\/h2>\n

\ud55c LSIG MCCB<\/strong> provides declared long-time, short-time, instantaneous and ground-fault functions. Its ground-fault function is not automatically equivalent to the high-sensitivity residual-current function required on a final circuit. Voltage, fault duty and sensing arrangements must come from its own exact model table.<\/p>\n\n\n\n\n\n\n\n\n
\uc601\uc5ed<\/th>\nJCR3HM listing<\/th>\nElectronic LSIG MCCB<\/th>\n<\/tr>\n<\/thead>\n
\uc81c\ud488 \uce74\ud14c\uace0\ub9ac<\/td>\nRCCB<\/td>\nMCCB with specified electronic release<\/td>\n<\/tr>\n
Overcurrent protection<\/td>\nSeparate coordinated device required<\/td>\nDeclared L\/S\/I functions<\/td>\n<\/tr>\n
Leakage or earth-fault function<\/td>\nSelected residual-current type and sensitivity<\/td>\nGround-fault function within release scope<\/td>\n<\/tr>\n
Voltage<\/td>\nListed 2P and 4P values<\/td>\nExact MCCB rating table required<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\uac00\uc774\ub4dc \uc794\ub958 \uc804\ub958 \ubcf4\ud638<\/a> describes the installation conditions that a device label alone cannot establish.<\/p>\n

\"800v<\/p>\n

Keep the two specifications separate<\/h2>\n

For JCR3HM, request poles, current, Type A or AC, residual-current sensitivity<\/strong> and coordination evidence. For an 800 V MCCB requirement, request a different exact product code with explicit AC or DC operating voltage and fault ratings. Neither product’s name supplies the other’s functions.<\/p>\n\n\n\n\n\n\n\n
Order<\/th>\nEssential evidence<\/th>\n<\/tr>\n<\/thead>\n
JCR3HM \ub204\uc804\ucc28\ub2e8\uae30<\/td>\nRCCB datasheet, wiring and overcurrent coordination<\/td>\n<\/tr>\n
800 V MCCB<\/td>\nExact voltage and fault-duty table, trip curves and connections<\/td>\n<\/tr>\n
Complete panel<\/td>\nAssembly verification and installation design<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Installation and procurement checks<\/h2>\n

Neutral routing, earthing and test procedures remain important for the RCCB. Use the declared test method and a suitable residual-current tester. IEC 61008-1 and IEC 60947-2 have different product scopes; listing both does not combine two device categories.<\/p>\n

Ask W9 Group to confirm the exact required product before quotation. Keep the RCCB and MCCB schedules separate so a misleading legacy title cannot become a purchasing instruction.<\/p>\n

\n

\uc790\uc8fc \ubb3b\ub294 \uc9c8\ubb38<\/h2>\n

Is JCR3HM an 800 V LSIG MCCB?<\/h3>\n

No. The reviewed current listing identifies an RCCB with separate overcurrent protection required. It does not establish that combined description.<\/p>\n

Does JCR3HM provide overload protection by itself?<\/h3>\n

No. Its RCCB function requires a coordinated MCB or fuse for overload and short-circuit protection.<\/p>\n

Is an MCCB ground-fault function the same as a 30 mA RCD?<\/h3>\n

Not automatically. Sensitivity, waveform response, sensing and intended protection differ. Verify the exact functions required by the installation.<\/p>\n

How should an 800 V requirement be quoted?<\/h3>\n

Specify a separate exact MCCB with the required AC or DC voltage, fault duty, poles and trip functions. Do not infer it from the JCR3HM name.<\/p>\n<\/section>\n

\ucc38\uace0\ubb38\ud5cc<\/h2>\n