JCR3HM RCCB و LSIG MCCB: عملکرد‌های حفاظتی و محدودیتهای رتبهبندی

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 for residual-current protection, with separate coordinated overcurrent protection required.

این JCR3HM RCCB 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.

What JCR3HM does

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

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.

Review the difference between RCBO and RCCB protection before allocating overload and residual-current functions.

What an LSIG MCCB does

یک LSIG MCCB 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.

راهنمای حفاظت از جریان باقی مانده describes the installation conditions that a device label alone cannot establish.

Keep the two specifications separate

For JCR3HM, request poles, current, Type A or AC, حساسیت به جریان باقی مانده 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.

Installation and procurement checks

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.

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.

منابع

• IEC 61008-1:2024 — RCCBs بدون حفاظت از جریان بیش از حد.
• IET — چه نوع رادیاتور را انتخاب کنم؟.
• IEC 60364-6:2016 – تأیید نصب.

برای انتخاب شکل موج و قطب،, تماس با گروه W9 با توپولوژی مدار، تجهیزات بارگذاری و قوانین بازار مقصد.