{"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":"%d9%85%d8%ad%d8%a7%d9%81%d8%b8%d8%aa-%d9%be%db%8c%d8%b4%d8%b1%d9%81%d8%aa%d9%87-%d8%a7%d8%b2-mcb-%d8%a7%d9%84%da%a9%d8%aa%d8%b1%d9%88%d9%86%db%8c%da%a9%db%8c-800-%d9%88%d9%84%d8%aa-%d8%a8%d8%a7-%d9%82","status":"publish","type":"post","link":"https:\/\/w9-group.com\/fa\/blog\/advanced-protection-of-800v-mccb-electronic-jcr3hm-rcd-with-built-in-lsig-trip-unit\/","title":{"rendered":"JCR3HM RCCB \u0648 LSIG MCCB: \u0639\u0645\u0644\u06a9\u0631\u062f\u200c\u0647\u0627\u06cc \u062d\u0641\u0627\u0638\u062a\u06cc \u0648 \u0645\u062d\u062f\u0648\u062f\u06cc\u062a\u0647\u0627\u06cc \u0631\u062a\u0628\u0647\u0628\u0646\u062f\u06cc"},"content":{"rendered":"

The older title combines two different device descriptions: an 800 V electronic MCCB with LSIG and the JCR3HM RCD. They must not be treated as one product. The current JCR3HM listing identifies an RCCB<\/a> for residual-current protection, with separate coordinated overcurrent protection required.<\/p>\n

\u0627\u06cc\u0646 JCR3HM RCCB<\/strong> table lists 2P\/4P, Type A or AC, 30\/100\/300 mA options and current choices from 25 to 100 A. It lists 230\/240 V for 2P and 400\/415 V for 4P. It does not establish an 800 V LSIG MCCB rating.<\/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

Review the difference between RCBO and RCCB protection<\/a> before allocating overload and residual-current functions.<\/p>\n

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

\u06cc\u06a9 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
\u0632\u0645\u06cc\u0646<\/th>\nJCR3HM listing<\/th>\nElectronic LSIG MCCB<\/th>\n<\/tr>\n<\/thead>\n
\u0631\u0634\u062a\u0647 \u0645\u062d\u0635\u0648\u0644\u0627\u062a<\/td>\nRCCB<\/td>\nMCCB with specified electronic release<\/td>\n<\/tr>\n
\u062d\u0641\u0627\u0638\u062a \u062f\u0631 \u0628\u0631\u0627\u0628\u0631 \u062c\u0631\u06cc\u0627\u0646 \u0628\u06cc\u0634 \u0627\u0632 \u062d\u062f<\/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
\u0648\u0644\u062a\u0627\u0698<\/td>\nListed 2P and 4P values<\/td>\nExact MCCB rating table required<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u0631\u0627\u0647\u0646\u0645\u0627\u06cc \u062d\u0641\u0627\u0638\u062a \u0627\u0632 \u062c\u0631\u06cc\u0627\u0646 \u0628\u0627\u0642\u06cc \u0645\u0627\u0646\u062f\u0647<\/a> describes the installation conditions that a device label alone cannot establish.<\/p>\n

\"800<\/p>\n

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

For JCR3HM, request poles, current, Type A or AC, \u062d\u0633\u0627\u0633\u06cc\u062a \u0628\u0647 \u062c\u0631\u06cc\u0627\u0646 \u0628\u0627\u0642\u06cc \u0645\u0627\u0646\u062f\u0647<\/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 RCCB<\/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

\u0633\u0648\u0627\u0644\u0627\u062a \u0645\u062a\u062f\u0627\u0648\u0644<\/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

\u0645\u0646\u0627\u0628\u0639<\/h2>\n