Residual current device Chint NM8NL-250 4P A RCD1 for NM8N 449990
CHT 449990
6942337669625
Chint NM8NL-250 RCD1 X residual current module for NM8N 4P moulded case (Frame 22): adjustable Type A residual current protection up to 2 A and delay up to 2000 ms, for safer and more selective industrial installations.
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4P Type A residual current module for Chint NM8N moulded case circuit breakers
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In 250 A (matching on NM8N moulded case up to frame 23, size indicated Frame 22)
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Sensitivity adjustment In: 0.03 0.05 0.1 0.2 0.3 0.5 1 2 A
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Delay adjustment t: 0 60 200 500 1000 2000 ms (selectivity and coordination)
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Ui 1000 Vac and Uimp 8 kV: high dielectric strength
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Compliance with IEC/EN 60947-2
€297.38
Items Available: 1
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Residual current module for moulded case Chint NM8N: advanced and integrated protection
The Chint NM8NL-250 4P Type A RCD1 X (code 449990) is a residual current module designed to be paired with the moulded case circuit breakers of the NM8N series. The direct integration on the protection device allows for more compact and tidy panels, maintaining high reliability in managing earth faults. It is a suitable solution for distribution and automation systems where service continuity and the safety of people/assets require effective and configurable residual current control.
Type A residual current: greater fault coverage compared to AC only
The Type A characteristic is essential when electronic loads (drives, UPS, switching power supplies, inverters, LED lighting, control equipment) are present in the system. Type A is designed to operate in the presence of alternating fault currents and pulsating direct currents, offering more suitable protection for modern systems compared to devices that detect only sinusoidal components.
In and time adjustment: selectivity, coordination, and fewer nuisance trips
One of the most important advantages of this module is the ability to adjust both the residual current sensitivity (In) and the operating time (t)
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The In adjustment from 0.03 A to 2 A allows the protection to be adapted to the type of line and risk level, balancing safety and system availability.
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The selectable delay 06020050010002000 ms is useful for achieving residual current selectivity between upstream and downstream devices, reducing unnecessary power outages and improving service continuity in case of localized faults.
Ideal for industrial panels and secondary distribution up to 690 Vac
With a nominal voltage Vn of 415 Vac and a maximum operating voltage Ue of 690 Vac, the module is suitable for many industrial and tertiary applications. The insulation voltage Ui of 1000 Vac and the impulse withstand voltage Uimp of 8 kV make it suitable for panels where high electrical performance and greater resistance to stress are required.
Compatibility and installation: designed for NM8N 4P
The NM8NL RCD1 X residual current module is declared suitable for Chint NM8N 4P moulded case circuit breakers (up to frame 23, with indicated size Frame 22). This compatibility makes adoption simple in new and retrofit projects, maintaining a consistent protection logic within the same product family.
| GENERAL DATA | |
|---|---|
| Model: | NM8NL-250 4P Type A RCD1 X |
| Code: | 449990 |
| Application: | Residual current module for NM8N moulded case circuit breakers |
| Number of poles: | 4P |
| Moulded case size: | Frame 22 (compatible up to frame 23 on NM8N 4P) |
| ELECTRICAL DATA | |
| Nominal current In: | 250 A |
| Residual current characteristic: | Type A |
| Nominal voltage Vn: | 415 Vac |
| Nominal frequency: | 50/60 Hz |
| Maximum operating voltage Ue: | 690 Vac |
| Insulation voltage Ui: | 1000 Vac |
| Impulse voltage Uimp: | 8 kV |
| IΔn adjustment (A): | 0.03 / 0.05 / 0.1 / 0.2 / 0.3 / 0.5 / 1 / 2 |
| Time adjustment Δt (ms): | 0 / 60 / 200 / 500 / 1000 / 2000 |
| Reference standard: | IEC-EN 60947-2 |
| DIMENSIONS | |
| Dimensions (H×W×D): | 232 × 140 × 88 mm |
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Data sheet
- Type: Differential modules
- Poles: 4P
- Amps: 250A
