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This is an abbreviation of electric terminology used in French-speaking environments. It actually refers to the Schneider Acti9 Vigi C120 series 500mA residual current protection accessory (RCD/earth leakage add-on module).
Here:
Reglette means modular accessory / terminal strip.
120 indicates compatibility with the C120 series circuit breakers (frame size 125A).
=500 stands for the rated residual operating current of 500mA.
It is used to add earth leakage protection to high-current C120 circuit breakers, in compliance with IEC/EN 61009-2-1.
- Abbreviation vs. Official Model Number
“Reglette 120=500” is a common field abbreviation, corresponding to the following official Schneider full models by number of poles:
| Polonii | Cod de comandă | Model complet | Protection Type |
| 2P | A9N18567 | Vigi C120 2P 500mA AC type | Electromagnetic, instantaneu |
| 3P | A9N18568 | Vigi C120 3P 500mA AC type | Electromagnetic, instantaneu |
| 4P | A9N18571 | Vigi C120 4P 500mA AC type | Electromagnetic, instantaneu |
| 4P | A9N18599 | Vigi C120 4P 500mA A‑SI type | Electromagnetic, interference‑resistant |
- Defalcarea modelului (using A9N18571 as example)
| Segmentul de model | Sens | Key Description |
| A9 | Platform code | Acti9 series low‑voltage distribution platform, for C120 breakers |
| N | Tip de produs | Circuit breaker accessory (leakage module) |
| 18571 | Codul funcției | 18 = Vigi C120 series, 5 = 500mA sensitivity, 71 = 4P AC type |
| Vigi C120 | Numele seriei | Earth leakage add‑on exclusively for C120 breakers, up to 125A |
| 500mA | Tripping current | Trips the breaker when leakage reaches 500mA |
| tip AC | Clasa de protectie | For pure AC earth leakage; electromagnetic trip, no auxiliary power needed |
- Specificații tehnice de bază (Official Standard)
| Articol | Caietul de sarcini | Aplicație |
| Tip de produs | Modular RCD accessory (Montare pe șină DIN) | Mounted to the right of C120 breaker, shared mechanism |
| Compatible breakers | Acti9 C120H / C120L (80/100/125O) | Only for C120 series; not compatible with IC65 etc. |
| Rated operational current | ≤ 125A | Matches breaker rating, max 125A load |
| Rated residual current | 500mA (fix) | For indirect contact protection; echipamente industriale, motoare |
| Tip de călătorie | Electromagnetic (ELM) | Voltage‑independent, works even during power loss |
| Clasa de protectie | tip AC / A‑SI type | A‑SI = electromagnetic interference‑resistant for harsh industry |
| Tensiune nominală | 230/400V și | For 3‑phase 4‑wire / single‑phase industrial systems |
| Insulation voltage | 500V și | Meets LV distribution insulation requirements |
| Montare | 35mm șină DIN, modular clip | Mechanically interlocked with C120 breaker |
| Indicator | Red mechanical fault indicator | Visible trip indication without tools |
- Full Series List (Vigi C120)
By rated residual operating current:
| Tripping Current | 2P Code | 3P Code | 4P Code | Caracteristici |
| 30mA | A9N18563 | A9N18564 | A9N18565 | Personal protection, instantaneu |
| 300mA | A9N18569 | A9N18570 | A9N18572 | Equipment protection, instantaneu / time‑delay |
| 500mA | A9N18567 | A9N18568 | A9N18571 | Heavy industrial protection, instantaneu (this model) |
| 500mA‑SI | – | – | A9N18599 | Interference‑resistant, for VFDs, motoare |
- Aplicații tipice
The 500mA Vigi C120 module is designed for heavy industrial use to avoid nuisance tripping from normal leakage during motor starting or VFD operation:
| Aplicație | Motiv | Recomandare |
| Large motor circuits | Normal leakage on start-up; 500mA avoids nuisance trips while protecting insulation | Use with C120H 3P 100A for motors above 75kW |
| VFD drive systems | Harmonic leakage on VFD output; 500mA suits industrial conditions | Use A‑SI type (A9N18599) for better immunity |
| Industrial switchboard busbar | 3‑phase 4‑wire distribution; prevents fire from insulation aging | Use with C120L 4P 125A as incomer protection |
| Construction temporary power | 500mA provides equipment protection in harsh environments | 2P for single‑phase welders; 3P for mixers |
| Capacitor banks | Transient leakage during switching; 500mA reduces frequent tripping | Use with C120H 3P 80A |
- Selecţie & Installation Guidelines
6.1 Selection Principles
| Factor | Recomandare | Risc |
| Sensibilitate | 30mA for personnel; 300/500mA for equipment | 500mA in personnel zones creates shock risk |
| Polonii | 2P for single‑phase; 3P for 3‑phase 3‑wire; 4P for 3‑phase 4‑wire | 3P in 3‑phase 4‑wire leaves neutral unprotected |
| Interference immunity | A‑SI type (A9N18599) for VFD/motor systems | Standard AC type may mis‑trip or fail in EMI environments |
| Breaker match | Only C120H/C120L (80–125A) | Not compatible with IC65 / NSX |
6.2 Instalare & Safety Rules
- Mechanical interlock: Must be interlocked with a C120 breaker; do not use standalone or with other series.
- Testare: Apăsați butonul de testare (T) monthly to verify correct operation.
- Cablaj: Follow official diagrams strictly for phase and neutral connections.
- Mediu: Indoor enclosure (IP20); outdoor use requires a protective box.
- Recommended Replacements
7.1 Schneider Upgraded Model
| Original | Upgraded Model | Improvement |
| A9N18571 (4P 500mA AC) | A9N18599 (4P 500mA A‑SI) | Higher electromagnetic immunity for automation |
7.2 International Brand Equivalents
| Marca | Serie | Model de înlocuire | Key Matching Specs |
| Siemens | 5SM | 5SM3 344‑0 | 4P, 500mA, tip AC, for 5SY6 125A |
| ABB | DS | DS203 M C125 A500 | 3P, 500mA, tip AC, for S200 125A |
| Eaton | NZM | NZM1‑XR500 | 3P, 500mA, tip AC, for NZM1 125A |
“Reglette 120=500” is the French abbreviation for Schneider’s Vigi C120 series 500mA earth leakage accessory, used to add industrial‑grade residual current protection to high‑current C120 circuit breakers.
Official recommended models:
A9N18567 (2P)
A9N18568 (3P)
A9N18571 (4P)
A9N18599 (4P, interference‑resistant)
Select based on pole number, immunity needs, and matching breaker. Always test after installation to ensure safe and stable operation of the industrial distribution system.
