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Chint NL1-100-4100/300-S RCD – 4P – 100A – 300mA
Chint NL1-100-4100/300-S 4 pole 100A 300mA S type time delayed residual current device for selective earth leakage protection in commercial and industrial electrical installations.
£55.14
Why Choose the Chint NL1-100-4100/300-S Time Delayed Residual Current Device?
The Chint NL1-100-4100/300-S is a reliable 4 pole time delayed Residual Current Device (RCD) designed to provide dependable earth leakage protection in commercial, industrial and three-phase electrical installations. As part of the proven Chint NL1 RCCB series, this S type device is engineered for selective tripping, helping improve protection coordination in larger distribution systems.
This RCCB continuously monitors residual current and disconnects the supply when an earth leakage fault is detected. The time delayed S type operation allows downstream residual current devices to trip first, helping prevent unnecessary disconnection of upstream circuits and improving continuity of supply.
With a 100A rated current, 300mA residual operating current and 4 pole configuration, the NL1-100-4100/300-S is ideal for use as an upstream RCD in commercial switchboards, industrial control panels and three-phase power distribution systems where fire protection and selective coordination are required.
Key Advantages
- Reliable 4 pole residual current protection for three-phase installations.
- S type time delayed tripping for improved selectivity.
- 100A rated current suitable for demanding electrical systems.
- 300mA earth leakage sensitivity for upstream and fire protection applications.
- Helps reduce nuisance tripping in installations with multiple RCDs.
- Compact DIN rail mounting for straightforward installation.
Key Features
- Chint NL1 Series RCCB.
- 100A rated current.
- 300mA residual operating current.
- 4 pole configuration.
- S type time delayed operation.
- Designed for three-phase electrical installations.
- Residual current protection without integrated overcurrent protection.
- 35mm DIN rail mounting for distribution boards and panels.
Selective Earth Leakage Protection for Distribution Systems
Time delayed residual current devices are commonly used upstream in electrical installations where discrimination between protective devices is required. By introducing a controlled delay before tripping, the upstream RCD allows downstream devices to operate first, helping localise faults and reduce disruption across wider circuits.
The Chint NL1-100-4100/300-S is well suited to commercial and industrial distribution systems where reliable residual current protection, fire risk reduction and coordinated protection are essential for safe and dependable electrical operation.
Typical Applications
- Commercial distribution boards.
- Industrial electrical installations.
- Three-phase power distribution systems.
- Main incomer and upstream RCD protection.
- Control panels and switchboards.
- Installations requiring selective residual current protection.
Technical Specifications
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| Current | 100 A | |
|---|---|---|
| Phase | Three Phase | |
| Poles | 4-pole | |
| Device Type | RCD | |
| Residual Current | 300 mA | |
| Manufacturer | Chint | |
| Series | NL1 | |
| Model | NL1-100-4100/300-S | |
| Product type | Time delayed Residual Current Device (RCD / RCCB) | |
| Rated current | 100A | |
| Residual operating current | 300mA | |
| Number of poles | 4 Pole | |
| Tripping type | S Type time delayed | |
| Rated voltage | 400V AC | |
| Frequency | 50 / 60Hz | |
| Rated insulation voltage | 500V | |
| Rated impulse withstand voltage | 4kV | |
| Rated conditional short-circuit current | 6kA | |
| Protection rating | IP20 | |
| Mounting type | 35mm DIN rail | |
| Standard | IEC/EN 61008-1 |
Frequently Asked Questions
What is the Chint NL1-100-4100/300-S used for?
It is used to provide time delayed residual current protection in three-phase electrical installations, particularly where upstream selective tripping is required.
What does S type mean on this RCD?
S type means the device has a time delayed tripping function, helping downstream RCDs operate first and improving discrimination within the electrical system.
Does this RCCB provide overload protection?
No. The NL1-100-4100/300-S is an RCCB and must be used with suitable overcurrent protection such as an MCB or MCCB.
Why choose a 300mA time delayed RCD?
A 300mA time delayed RCD is commonly used for upstream earth leakage protection and fire risk reduction while helping avoid unnecessary tripping of wider circuits.
Where is this device typically installed?
It is typically installed on a DIN rail inside commercial distribution boards, industrial switchboards and three-phase control panels.
Trusted by Electrical Professionals Worldwide
Chint NL1 time delayed residual current devices are trusted by electricians, panel builders and industrial engineers for dependable earth leakage protection, selective coordination and robust performance in modern electrical installations.
