People Electric · Auto-Reclose MCCB
Product overview
People Electric RDM5Z moulded-case circuit breakers combine distribution protection, residual-current monitoring and automatic reclosing in AC three-phase four-wire systems with a directly grounded neutral. The unit monitors current, voltage and residual current, and provides configurable protection and communication functions. Select the rated-current frame and breaking level, then confirm all protection and reclose settings for the application.
Technical selection summary
| Manufacturer / series | Original People Electric RDM5Z |
|---|---|
| Main circuit | AC400V; 50/60Hz; three-phase four-wire system with directly grounded neutral |
| Pole arrangement | 3P+N, through-type N pole; do not treat this as four switched poles |
| Rated currents / frames | 125A, 250A, 400A or 630A; rated current equals the corresponding frame rating in the source |
| Adjustable long-time current Ir | 125A: 50–125A; 250A: 100–250A; 400A: 160–400A; 630A: 252–630A. 1A adjustment steps; OFF is also a protection-setting option. |
| 125A frame Icu / Ics at AC400V | L: 35/25kA; M: 50/35kA; H: 65/42kA |
| 250A frame Icu / Ics at AC400V | L: 35/25kA; M: 50/42kA; H: 85/50kA |
| 400A and 630A frame Icu / Ics at AC400V | L: 50/35kA; M: 65/42kA; H: 85/55kA |
| Residual-current threshold settings | 125/250A: 50, 100, 200, 300, 500, 800mA or Auto. 400/630A: the same settings plus 1000mA. Auto is the source automatic-tracking setting; exact behavior must match the application. |
| Residual protection type / delay | AC type. 0.3s non-delay characteristic as labelled in the source; delayed settings 0.5s or 0.7s. See the time/current table for actual operating times. |
| Reclosing time | 20–60s, as stated in the main table; confirm the required automatic/manual operating mode |
| Protection functions | Overcurrent, short circuit, residual current, overvoltage, undervoltage, phase-loss and neutral-line fault functions; enable states and settings are configurable |
| Remote control / communication | External remote switching terminals; RS485 communication with Modbus / stated grid protocol support, subject to the exact configured unit |
| Accessory codes | None: no accessory; 408: alarm contact; 420: auxiliary contact; 460: two auxiliary-contact sets; 428: auxiliary plus alarm; 468: two auxiliary-contact sets plus alarm |
| Insulation / impulse withstand | Ui AC1000V; Uimp 8000V |
| Dimensions W × L × H (mm) | 125A: 122 × 220 × 139; 250A: 142 × 240 × 142; 400/630A: 198 × 336 × 182 |
| Arc clearance / utilization | 125/250A: ≤50mm, category A; 400/630A: ≤100mm, category B, as tabulated |
| Standards stated | IEC 60947-2; GB 14048.2; GB/Z 6829 |
Rated current and adjustable trip setting are different quantities. State the exact Ir setting in the enquiry. The residual-current buttons are restricted by the selected rated-current frame: 1000mA is offered only for 400A/630A. Delay values are the manufacturer setting labels and do not replace the full time/current table. Confirm auto-reclose mode, protection thresholds, remote controls and accessory scope for the actual system.
Typical applications
- AC400V three-phase four-wire distribution requiring combined current, voltage and residual-current protection.
- Distribution automation requiring approved automatic reclose, monitoring and remote-control functions.
Specify your enquiry
For a focused quotation, include:
- Rated current, L/M/H level, residual threshold, residual delay and accessory code.
- Required Ir setting, system/neutral arrangement, fault level and all voltage/current protection settings.
- Automatic/manual reclose mode, communication/remote-control requirements, quantity and destination.
Download People Electric RDM5Z catalogue (PDF)
Product reference images and drawings
