{"id":1394,"date":"2026-01-01T09:00:00","date_gmt":"2026-01-01T01:00:00","guid":{"rendered":"https:\/\/eqsvq3fzct.wpdns.site\/blog\/jc3le-2p-rcbos-tiny-guardian-stops-shocks-fires-2\/"},"modified":"2026-10-24T14:18:31","modified_gmt":"2026-10-24T06:18:31","slug":"jc3le-2p-rcbos-tiny-guardian-stops-shocks-fires-2","status":"publish","type":"post","link":"https:\/\/w9-group.com\/ja\/blog\/jc3le-2p-rcbos-tiny-guardian-stops-shocks-fires-2\/","title":{"rendered":"JC3LE-2P RCBO: 6 kA Ratings and Circuit Selection"},"content":{"rendered":"

A two-pole RCBO<\/a> order can look complete while omitting the residual-current waveform and fault duty. For JC3LE-2P, those details matter more than a broad promise to prevent shocks or fires: the protective functions must match the circuit and its installation rules.<\/p>\n

Summary: The JC3LE-2P is an RCBO: it combines overcurrent protection and \u6b8b\u7559\u96fb\u6d41\u4fdd\u8b77<\/strong> in one two-pole device. Published product information describes 6-63 A choices, B or C curves, a Type A residual-current option in the current technical table and a 6 kA short-circuit rating; verify the exact order code before relying on any value. Start with circuit current, waveform, sensitivity, poles, fault level and local installation rules, then document the test-button and commissioning checks.<\/p>\n

JC3LE-2P Protection Scope<\/h2>\n

An RCBO is selected by the protection boundary it must cover, not by the label alone. The MCB element addresses overload and short circuit; the residual-current element compares current paths and trips when the declared residual current is exceeded.<\/p>\n

JC3LE-2P Protection Functions<\/h2>\n

The published JC3LE-2P description identifies double-pole switching, a contact indicator and selectable B\/C curves. The ordered \u6b8b\u7559\u96fb\u6d41\u578b<\/strong> must be matched to the connected load and the local code. A 30 mA, 100 mA or 300 mA sensitivity is a project decision; do not infer shock or fire protection from a generic RCBO name.<\/p>\n

Installation boundary<\/h3>\n

Route the neutral through the sensing path specified by the wiring diagram, torque terminals to the current instructions, and verify line\/load orientation. Test the device with the required instrument and record the result; a front test button does not replace the complete commissioning procedure.<\/p>\n

The 4\u6975RCBO\u30ac\u30a4\u30c9<\/a> \u30a2\u30e9\u30fc\u30e0\u4fe1\u53f7\u3001\u8ca0\u8377\u96fb\u6d41\u3001\u304a\u3088\u3073 \u7834\u58ca\u80fd\u529b<\/strong> \u5225\u9014\u78ba\u8a8d\u304c\u5fc5\u8981\u3067\u3059\u3002.<\/p>\n

RCBO Specification Checks<\/h2>\n\n\n\n\n\n\n\n\n
\u6c7a\u5b9a\u6b21\u5143<\/th>\n\u78ba\u8a8d\u3059\u3079\u304d\u3053\u3068<\/th>\n\u306a\u305c\u91cd\u8981\u306a\u306e\u304b<\/th>\n<\/tr>\n<\/thead>\n
Overcurrent<\/td>\nRated current and B\/C curve<\/td>\nMatches conductor ampacity and inrush<\/td>\n<\/tr>\n
\u6b8b\u7559\u96fb\u6d41<\/td>\nType AC or Type A; I\u0394n<\/td>\nMatches waveform and protection objective<\/td>\n<\/tr>\n
\u6545\u969c\u6642\u306e\u7fa9\u52d9<\/td>\nDeclared breaking capacity<\/td>\nMust exceed prospective fault current<\/td>\n<\/tr>\n
Switching<\/td>\nTwo-pole neutral isolation<\/td>\nSupports the specified isolation method<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Reading the current JC3LE-2P listing<\/h2>\n

The current W9 product table lists 6 kA at 230\/240 V, 50\/60 Hz, 6\u201363 A options, 30\/100\/300 mA sensitivity and B or C overcurrent curves. Its waveform table identifies Type A. These are separate specification fields: a 6 kA short-circuit rating does not describe residual-current sensitivity, and a B curve does not make the device a Type B RCD.<\/p>\n

An order should identify all these fields together. For example, a circuit requiring additional protection cannot adopt a higher residual-current threshold simply to stop unwanted operation. Investigate standing leakage, shared neutrals and connected equipment, then apply the destination rules and manufacturer instructions. Do not use this article as a live-work procedure.<\/p>\n

\u6bd4\u8f03\u306e\u4ed5\u65b9 RCBO\u304a\u3088\u3073RCCB\u306e\u4fdd\u8b77<\/a> \u30a4\u30f3\u30c6\u30b0\u30ec\u30fc\u30c8\u578b\u904e\u96fb\u6d41\u4fdd\u8b77\u3068\u6b8b\u7559\u96fb\u6d41\u691c\u51fa\u3092\u533a\u5225\u3059\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002.<\/p>\n

RCBO Application Requirements<\/h2>\n\n\n\n\n\n\n\n
\u7533\u8acb<\/th>\nCheck before release<\/th>\n<\/tr>\n<\/thead>\n
Lighting and socket circuits<\/td>\nLoad current, curve and 30 mA requirement<\/td>\n<\/tr>\n
Motor or refrigeration branch<\/td>\nStarting current and nuisance-trip margin<\/td>\n<\/tr>\n
\u96fb\u5b50\u6a5f\u5668\u7528\u8ca0\u8377<\/td>\nResidual-current waveform and Type A need<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u57fa\u6e96\u3068\u30b3\u30f3\u30d7\u30e9\u30a4\u30a2\u30f3\u30b9<\/h2>\n

IEC 61009-1 is the product standard for RCBOs; IEC 61008-1 covers RCCBs without integral overcurrent protection. IEC 60364-4-41 addresses protection against electric shock at installation level. A standard reference is not a certificate for every model, so request the exact declaration, test scope and wiring diagram for the supplied device.<\/p>\n

\u9078\u5b9a\u304a\u3088\u3073\u8a66\u904b\u8ee2\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8<\/h2>\n
    \n
  1. \u8a18\u9332\u96fb\u5727\u3001\u96fb\u6d41\u3001\u30dd\u30fc\u30eb\u6570\u3001\u8ca0\u8377\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3001\u304a\u3088\u3073\u5c06\u6765\u7684\u306a\u6545\u969c\u96fb\u6d41\u3002.<\/li>\n
  2. \u627f\u8a8d\u3055\u308c\u305f\u56f3\u9762\u3068\u6a19\u6e96\u4ed5\u69d8\u306b\u3001\u6b63\u78ba\u306a\u30e2\u30c7\u30eb\u3068\u4ed8\u5c5e\u54c1\u3092\u4e00\u81f4\u3055\u305b\u307e\u3059\u3002.<\/li>\n
  3. \u30ec\u30d3\u30e5\u30fc\u306e\u8abf\u6574\u3001\u8a31\u53ef\u306e\u53d6\u5f97\u3001\u6e29\u5ea6\u304a\u3088\u3073\u4fdd\u7ba1\u74b0\u5883\u306e\u78ba\u8a8d\u3092\u884c\u3046\u3002.<\/li>\n
  4. \u7bc4\u56f2\u5185\u3067\u5ba3\u8a00\u66f8\u3001\u8a66\u9a13\u8cc7\u6599\u3001\u304a\u3088\u3073\u8a2d\u7f6e\u624b\u9806\u66f8\u306e\u63d0\u51fa\u3092\u6c42\u3081\u307e\u3059\u3002.<\/li>\n
  5. \u5c0e\u5165\u6642\u306e\u8a18\u9332\u8a2d\u5b9a\u3001\u30c8\u30eb\u30af\u5024\u3001\u6a5f\u80fd\u30c6\u30b9\u30c8\u7d50\u679c\u3092\u8a18\u9332\u3057\u307e\u3059\u3002.<\/li>\n<\/ol>\n

    \u3088\u304f\u3042\u308b\u8cea\u554f<\/h2>\n

    Is JC3LE-2P a 10 kA RCBO?<\/h3>\n

    The current product table lists 6 kA, not 10 kA. Use the delivered order code and marking to confirm the rating at the actual circuit voltage; do not borrow a rating from a different JC3LE model.<\/p>\n

    Does the B curve mean Type B residual-current protection?<\/h3>\n

    No. B and C curves describe overcurrent operation, while Type A describes residual-current waveform<\/strong> capability. Both fields must be specified independently.<\/p>\n

    Can a 300 mA option replace a required 30 mA device?<\/h3>\n

    Not merely to avoid tripping. Sensitivity must satisfy the circuit’s protection objective and local installation rules; a higher threshold is not an equivalent substitute for required additional protection.<\/p>\n

    Why does an RCBO trip with its load disconnected?<\/h3>\n

    A shared or incorrectly routed neutral, wiring defect or device problem may remain even when the appliance is removed. A competent electrician should isolate and test the circuit rather than repeatedly reset it.<\/p>\n

    \u53c2\u8003\u6587\u732e<\/h2>\n