Vigirex
Vigirex is Schneider Electric’s Earth Leakage Relay (ELR) range, commonly used in commercial and industrial electrical installations for earth‑fault protection.
Since I didn’t find any Vigirex-specific documents or emails in your workspace, here’s a grounded technical overview based on standard product characteristics used in practice (clearly separated from internal/company material).
What is Vigirex?
Vigirex is a core-balance earth leakage protection system that:
- Detects residual (earth leakage) current
- Sends a trip signal to a breaker or contactor
- Prevents electric shock, fire, and equipment damage
It is typically used with Compact / Masterpact MCCB & ACB systems.
Typical Vigirex System Architecture
A complete Vigirex setup includes:
- Core Balance CT (CBCT)
- All phase conductors + neutral pass through
- Detects residual current
- Vigirex Relay
- Processes the CT signal
- Adjustable settings
- Trip Device
- Shunt trip or undervoltage release on MCCB/ACB
- Or control relay/contactor
Common Vigirex Models (by function)
Vigirex RH Series
- Basic earth leakage detection
- Adjustable current threshold
- Industrial panels
Vigirex RMH / RHU
- Higher sensitivity ranges
- Time-delay adjustment
- Suitable for selective coordination
Vigirex RH99 / RH197 (advanced)
- Wide leakage current range
- LED status indication
- Used in critical systems
( Exact model capabilities depend on variant; always verify datasheets for compliance use. )
Key Adjustable Settings
- Leakage current (IΔn)
Typical ranges:- 30 mA (special applications)
- 100 mA
- 300 mA (fire protection)
- 1 A – 30 A (industrial)
- Time delay
- Instantaneous
- Short/long delay (selectivity with downstream RCCBs)
- Manual/automatic reset
Where Vigirex Is Commonly Used
- Factories and industrial plants
- Data centers
- Large HVAC & chiller circuits
- Marine/offshore panels
- Commercial buildings with MCCBs or ACBs
Especially useful where RCCBs cannot be used due to:
- High load current
- Nuisance tripping
- Requirement for discrimination
Vigirex vs RCCB (Quick Comparison)
| Aspect | Vigirex | RCCB |
|---|---|---|
| Sensitivity adjustable | ✅ | ❌ |
| Time delay | ✅ | ❌ |
| Uses external CT | ✅ | ❌ |
| Industrial applications | ✅ | ❌ |
| Direct shock protection | Depends on setting | ✅ |
Common Installation Notes (Best Practice)
- Neutral must pass through CBCT
- No neutral–earth bonding downstream
- CT polarity must be correct
- Keep the earth conductor outside the CT
- Test trip circuit during commissioning
Related Standards (Singapore context)
- SS 638
- SS CP 5
- IEC 60947-2 (with earth fault protection systems)
