nl1-100-4100/100-s chint 100a 4 pole 100ma s type time delayed rcd

Why Choose the Chint NL1-100-4100/100-S Time Delayed Residual Current Device?

The Chint NL1-100-4100/100-S is a robust 4 pole time delayed Residual Current Device (RCD) designed to provide reliable earth leakage protection in commercial, industrial and three-phase electrical installations. As part of the trusted Chint NL1 RCCB series, this S type device is engineered to support selective tripping and improved discrimination in systems with multiple RCDs.

This RCCB continuously monitors residual current and disconnects the supply when an earth leakage fault is detected. The time delayed S type design helps prevent nuisance tripping by allowing downstream protective devices to operate first, making it suitable for upstream protection in distribution boards and larger electrical systems.

With a 100A rated current, 100mA residual operating current and 4 pole configuration, the NL1-100-4100/100-S is ideal for three-phase power distribution, control panels, commercial switchboards and industrial installations requiring dependable residual current protection with selective coordination.

Key Advantages

• Reliable 4 pole residual current protection for three-phase systems.
• Time delayed S type operation for improved discrimination.
• 100A rated current suitable for larger electrical installations.
• 100mA residual operating current for earth leakage and fire risk protection.
• DIN rail mounting for straightforward installation in distribution boards.
• Manufactured by Chint for dependable long-term performance.

Key Features

• Chint NL1 Series RCCB.
• 100A rated current.
• 100mA residual operating current.
• 4 pole configuration.
• S type time delayed tripping.
• Designed for three-phase electrical installations.
• Residual current protection without overcurrent protection.
• Compact 35mm DIN rail mounting.

Technical Specifications

• Manufacturer: Chint
• Series: NL1
• Model: NL1-100-4100/100-S
• Product type: Time delayed Residual Current Device (RCD / RCCB)
• Rated current: 100A
• Residual operating current: 100mA
• Number of poles: 4 Pole
• Tripping type: S Type time delayed
• Rated voltage: 400V AC
• Frequency: 50/60Hz
• Rated insulation voltage: 500V
• Impulse withstand voltage: 4kV
• Rated conditional short-circuit current: 6kA
• Protection rating: IP20
• Mounting type: 35mm DIN rail
• Standard: IEC/EN 61008-1

Selective Earth Leakage Protection for Distribution Systems

Time delayed RCDs are designed to improve selectivity in electrical installations where more than one residual current device is fitted. By delaying tripping briefly, the upstream device allows downstream RCDs to respond first, helping reduce unwanted disconnection of wider circuits.

The Chint NL1-100-4100/100-S is particularly useful as an upstream protective device in commercial boards, industrial panels and three-phase distribution systems where continuity of supply and coordinated protection are important.

Typical Applications

• Commercial distribution boards.
• Industrial electrical installations.
• Three-phase power distribution systems.
• Main incomer and upstream RCD protection.
• Control panels and switchboards.
• Systems requiring selective RCD coordination.

Trusted by Electrical Professionals Worldwide

Chint NL1 time delayed residual current devices are trusted by electricians, panel builders and industrial engineers for selective earth leakage protection, dependable operation and robust performance in modern electrical installations.