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| Model Part | Senso |
| ABE | Series code, Meta-MEC economy MCCB, viaggio magnetotermico, low breaking capacity (economy type) |
| 40 | Frame rating current 400A |
| 4 | 4 poli (4P), suitable for three-phase four-wire system protection |
| B | Breaking capacity class B (10kA@AC380V) |
| 400UN | Rated operational current 400A, set by plug module |
- Parametri tecnici chiave
| Item | Specifica | Descrizione |
| Tipo di prodotto | Economy Molded Case Circuit Breaker (MCCB) | Thermal-magnetic trip, fixed mount |
| Tensione nominale | AC 600V, Ui 690V | Conforme all'IEC 60947-2 |
| Frequenza nominale | 50/60Hz | Universal frequency range |
| Capacità di interruzione | Icu=10kA@AC380V | Class B economy breaking capacity |
| Trip Type | Fixed thermal-magnetic trip | Protezione da sovraccarico (inverse time) + protezione da cortocircuito (instantaneous) |
| Rated Insulation Voltage | Ui=690V | Maximum voltage for insulation performance |
| Mechanical Endurance | 8500 operazioni | Standard operating cycles |
| Electrical Endurance | 1000 operazioni | Operating cycles at rated current |
| Mounting Type | Tipo fisso | Standard 35mm DIN rail or panel mount |
| Connection | Collegamento frontale / Rear connection | Optional for different installations |
| Standard applicabili | CEI 60947-1/2, IN 60947-1/2 | International electrical standards |
- Series Model List (400AF Frame)
| Modello | Poles | Capacità di interruzione | Intervallo di corrente nominale |
| ABE402b | 2P | 10IL | 250UN, 300UN, 350UN, 400UN |
| ABE403b | 3P | 10IL | 250UN, 300UN, 350UN, 400UN |
| ABE404b | 4P | 10IL | 250UN, 300UN, 350UN, 400UN |
| ABS402b | 2P | 25IL | 250UN, 300UN, 350UN, 400UN |
| ABS403b | 3P | 25IL | 250UN, 300UN, 350UN, 400UN |
| ABS404b | 4P | 25IL | 250UN, 300UN, 350UN, 400UN |
| ABH402b | 2P | 35IL | 250UN, 300UN, 350UN, 400UN |
| ABH403b | 3P | 35IL | 250UN, 300UN, 350UN, 400UN |
| ABH404b | 4P | 35IL | 250UN, 300UN, 350UN, 400UN |
- Recommended International Brand Replacements
| Marca | Series | Modello sostitutivo | Key Matching Parameters |
| Schneider | EZD Series | EZD400E4400 | 4P, 400UN, 10IL, viaggio magnetotermico |
| Siemens | 3VT Series | 3VT8440-1AA03 | 4P, 400UN, 10IL, viaggio magnetotermico |
| ABB | Tmax Series | T2N400 TMD 400/400 FF 4P | 4P, 400UN, 10IL, viaggio magnetotermico |
| Eaton | Power Defense | LZMN4-A400-I | 4P, 400UN, 10IL, viaggio magnetotermico |
| Changshu Switch | CM3 Series | CM3-400M/4300B 400A | 4P, 400UN, 10IL, viaggio magnetotermico |
- Applications & Note sulla selezione
- Applicazioni tipiche
End protection in low-voltage distribution systems, per esempio., lighting and power distribution in commercial buildings and industrial plants
Three-phase asynchronous motor protection (≤200kW, 380V)
Capacitor bank protection
Small generator outlet protection
- Selection Guidelines
Confirm system voltage (≤600V) and frequency (50/60Hz)
Calculate circuit rated current to ensure 400A meets long‑term operation
Evaluate short-circuit level: if >10IL, use higher breaking capacity ABS (25IL) or ABH (35IL) serie
Consider pole requirement: 4P for neutral protection applications
Confirm mounting (fixed/drawout) and connection direction (front/rear)
- Caratteristiche del prodotto & Advantages
- Economico & Practical: ABE series is cost-effective for budget‑limited projects
- Standard Design: Complies with IEC standards, interchangeable with other brands
- Reliable Protection: Thermal-magnetic trip provides basic overload and short-circuit protection
- Installazione flessibile: Supports front/rear wiring and multiple mounting methods
- Complete Accessories: Can be equipped with auxiliary contacts, alarm contacts, undervoltage release, ecc.
- Maintenance & Risoluzione dei problemi
- Ispezione regolare: Inspect appearance and tighten terminals quarterly to avoid looseness or overheating
- Trip Test: Perform manual trip test annually to verify mechanical reliability
- Risoluzione dei problemi:
Frequent overload tripping: Check load or replace with higher rated model
Short-circuit tripping: Locate and repair short circuit before closing
Mancata chiusura: Check mechanical jam or replace damaged parts
LS ELECTRIC ABE404B-4P-400A is an economy 4-pole MCCB with 400A rated current and 10kA breaking capacity, suitable for low-voltage distribution systems with moderate breaking requirements. For higher breaking capacity, use ABS (25IL) or ABH (35IL) serie.
Applications of LS ELECTRIC ABE404B-4P-400A MCCB
Core Positioning:
This 4-pole economy MCCB (4P, 400UN, 10IL) is mainly used for end protection in low‑voltage distribution systems, especially where neutral protection is required, short-circuit current ≤10kA, and budget is limited.
- Commercial Building Distribution
| Application | Suitability | Selection Tip |
| Main distribution board main breaker | 4P protects 3-phase 4-wire; 400A fits small‑to‑medium commercial buildings | Total load ≤320A (80% duty), short-circuit ≤10kA |
| Main A/C protection | 400A for large central A/C units (≤200kW, 380V) | Match compressor inrush; recommend undervoltage release |
| Emergency lighting | 4P ensures neutral continuity for reliable emergency operation | Use with EPS/UPS; front connection for easy maintenance |
| Elevator room power | 400A for multiple elevators; 4P prevents neutral faults | Install in dedicated cabinet; ensure ventilation |
Typical Cases:
3–5 story office buildings, chain supermarkets, hotels as main or important branch breaker.
- Industrial Plant Applications
- General Machinery
Main breaker for small‑medium production lines: 400A covers multiple branches; 10kA suits general industrial short-circuit levels
Motor group protection: Total power ≤200kW, used with thermal relays for precise protection
Auxiliary equipment: Fans, pumps, compressori; 4P for control circuits with neutral
- Specific Industries
Food processing: Cost-effective for light industry; 4P ensures safety and quality
Electronic assembly: 400A for multiple lines; 4P avoids neutral drift affecting precision equipment
Warehouse power: Main breaker for lighting and forklift charging
Warning:
If short-circuit current >10IL, upgrade to LS ABS (25IL) or ABH (35IL).
- Public & Edifici residenziali
- Education & Medical
School main distribution: 4P protects lighting, A/C, computer rooms; 400A for whole building
Community hospital: 4P for medical equipment with neutral; economy for primary care
Stadium auxiliary systems: Lighting, audio, seats; 400A for local zones
- Infrastructure
Small wastewater treatment: 400A for pumps and blowers; 4P prevents control system failure
Urban landscape lighting: Main breaker for multi-loop lighting with reliable neutral
Small waste transfer station: 400A for compressors and conveyors; low operating cost
- Special Applications
- Capacitor Bank Protection
For capacitor banks ≤100kvar; 4P prevents inrush and short-circuit during switching
Recommend adding SPD for surge protection
- Small Generator Systems
Main breaker for generators ≤300kVA; 4P ensures safe isolation from grid
Used with synchronizing equipment for smooth switch between mains and generator
- Temporary Power
Construction site temporary power main breaker; 400A for cranes, welders
4P suitable for harsh site conditions; prevents electric shock from broken neutral
- Key Selection & Application Criteria
| Factor | Recommended | Not Suitable For |
| Short-circuit level | ≤10kA: suitable; >10IL: use ABS/ABH | High-risk areas (chemical, mining) con >10IL |
| Load type | Resistive & inductive loads (illuminazione, motori) | Large rectifiers, arc furnaces, high nonlinear loads |
| Earthing system | TN-S, TT systems (4P neutral protection) | IT systems (operating rooms, mines) |
| Environment | Indoor dry, ≤40°C | Outdoor, damp, explosive areas (needs special enclosure) |
| Operation frequency | Infrequent operation (≤12/day) | Frequent duty (cranes, elevator main circuits) |
- Application Advantages
- Economico: High cost-performance for budget projects
- Full protection: 4P design covers 3-phase + neutral for modern distribution
- Standard compliance: CEI 60947-2, interchangeable with major brands
- Flexible installation: Front/rear wiring + 35Guida DIN da mm
- Reliable: Mechanical 8500, elettrico 1000 operazioni
Best Combination:
Use ABE404B-4P-400A as main breaker + LS MCBs for branch protection to form a reliable two‑stage system.
For higher performance or electronic protection, upgrade to ABS (25IL), ABH (35IL), or ABN (electronic trip) serie.
