{"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":"%d0%bf%d0%b5%d1%80%d0%b5%d0%b4%d0%be%d0%b2%d0%b0%d1%8f-%d0%b7%d0%b0%d1%89%d0%b8%d1%82%d0%b0-%d1%8d%d0%bb%d0%b5%d0%ba%d1%82%d1%80%d0%be%d0%bd%d0%bd%d0%be%d0%b3%d0%be-%d0%ba%d0%be%d0%bc%d0%bc%d1%83","status":"publish","type":"post","link":"https:\/\/w9-group.com\/ru\/blog\/advanced-protection-of-800v-mccb-electronic-jcr3hm-rcd-with-built-in-lsig-trip-unit\/","title":{"rendered":"JCR3HM RCCB vs LSIG MCCB: \u0444\u0443\u043d\u043a\u0446\u0438\u0438 \u0437\u0430\u0449\u0438\u0442\u044b \u0438 \u043f\u0440\u0435\u0434\u0435\u043b\u044c\u043d\u044b\u0435 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f \u043d\u043e\u043c\u0438\u043d\u0430\u043b\u044c\u043d\u043e\u0439 \u043c\u043e\u0449\u043d\u043e\u0441\u0442\u0438"},"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

The 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

\u0420\u0430\u0441\u0441\u043c\u043e\u0442\u0440\u0438\u0442\u0435 \u0440\u0430\u0437\u043d\u0438\u0446\u0443 \u043c\u0435\u0436\u0434\u0443 \u0417\u0430\u0449\u0438\u0442\u0430 RCBO \u0438 RCCB<\/a> \u043f\u0440\u0435\u0436\u0434\u0435 \u0447\u0435\u043c \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u044f\u0442\u044c \u0444\u0443\u043d\u043a\u0446\u0438\u0438 \u043f\u0435\u0440\u0435\u0433\u0440\u0443\u0437\u043a\u0438 \u0438 \u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u043e\u0433\u043e \u0442\u043e\u043a\u0430.<\/p>\n

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

An 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
\u041f\u043e\u043b\u0435<\/th>\nJCR3HM listing<\/th>\nElectronic LSIG MCCB<\/th>\n<\/tr>\n<\/thead>\n
\u041a\u0430\u0442\u0435\u0433\u043e\u0440\u0438\u044f \u043f\u0440\u043e\u0434\u0443\u043a\u0446\u0438\u0438<\/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

\u0420\u0443\u043a\u043e\u0432\u043e\u0434\u0441\u0442\u0432\u043e \u043f\u043e \u0437\u0430\u0449\u0438\u0442\u0430 \u043e\u0442 \u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u043e\u0433\u043e \u0442\u043e\u043a\u0430<\/a> \u043e\u043f\u0438\u0441\u044b\u0432\u0430\u0435\u0442 \u0443\u0441\u043b\u043e\u0432\u0438\u044f \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043a\u0438, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043d\u0435\u043b\u044c\u0437\u044f \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u0438\u0442\u044c \u0442\u043e\u043b\u044c\u043a\u043e \u043d\u0430 \u043e\u0441\u043d\u043e\u0432\u0430\u043d\u0438\u0438 \u043c\u0430\u0440\u043a\u0438\u0440\u043e\u0432\u043a\u0438 \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432\u0430.<\/p>\n

\"\u042d\u043b\u0435\u043a\u0442\u0440\u043e\u043d\u043d\u044b\u0439<\/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 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

\u0427\u0430\u0441\u0442\u043e \u0437\u0430\u0434\u0430\u0432\u0430\u0435\u043c\u044b\u0435 \u0432\u043e\u043f\u0440\u043e\u0441\u044b<\/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

\u0421\u0441\u044b\u043b\u043a\u0438<\/h2>\n