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(MN Type 125VDC Undervoltage Release)
Schneider LV429413 is an MN series undervoltage release specially designed for molded case circuit breakers of the Compact NSX, PowerPact Multistandard, and EasyPact CVS series. It has a rated voltage of 125VDC and uses screwless spring terminals. It is used for emergency stop or remote tripping control. When the control voltage drops below 35% of the rated value, it automatically trips the circuit breaker to ensure system safety.
- Interpretazione del codice modello
| Segmento di codice | Senso |
| LV | Prefix for Schneider low-voltage power distribution products |
| 4294 | Product category identifier for undervoltage releases |
| 13 | Specific specification code corresponding to 125VDC rating, MN type, screwless terminals |
| MN | Product type code: Rilascio di sottotensione; MX denotes Shunt Trip |
Caratteristiche principali: 125VDC operating voltage, suitable for 100-630A molded case circuit breakers, non-delay type, tripping threshold at 35% della tensione nominale.
- Parametri tecnici fondamentali
| Articolo | Specifica |
| Tipo di prodotto | MN Type Undervoltage Release |
| Tensione di controllo nominale | 125VCC (not for AC systems) |
| Tripping Threshold | ≤ 35% della tensione nominale (ca. 43.75VCC) |
| Reset Voltage | ≥ 85% della tensione nominale (ca. 106.25VCC) |
| Tipo di terminale | Screwless Spring Terminal |
| Compatible Breaker Series | Compact NSX 100–630A, PowerPact Multistandard, EasyPact CVS |
| Mounting Location | Accessory slot on front of circuit breaker |
| Wire Capacity | 1.5–2.5mm² cable |
| Protezione dall'ingresso | IP20 (when installed) |
| Temperatura operativa | -25°C~+70°C |
| Peso | ca. 50G |
| Certificazioni | CEI 60947-2, UL 489, CSA C22.2 No. 5 |
- Ambiente applicativo
- System Types
Industrial automation control systems, data center UPS systems
DC power supply systems, emergency stop circuits
Remote monitoring and tripping applications
- Condizioni operative
Control voltage fluctuation: 85%-110% of rated value for stable operation
EMC performance: Compliant with IEC 61000-4
Compatible frame sizes: 100UN, 160UN, 250UN, 400UN, 630UN (NSX series)
- Requisiti di installazione
Must be installed in dedicated front accessory slot with reliable mechanical interlock
Control circuit to be protected by 1A fuse to prevent coil damage from short circuit
Observe polarity: “+” for positive, “-” for negative
- Riferimento incrociato & Replacement Models
| Replacement Type | Modello | Marca | Descrizione |
| Sostituzione diretta | LV429414 | Schneider | 220VAC version for AC control circuits |
| Equivalent Function | S29413 | Schneider (Square D) | 125VDC undervoltage release for PowerPact series |
| Cross鈥態rand Alternative | ABB TA250-125DC | ABB | 125VDC undervoltage release for Tmax MCCBs |
| Alternativa domestica | CHINT NXB-MN/125DC | CINT | For NXB series MCCBs |
- Informazioni ufficiali sugli ordini
| Articolo | Dettagli |
| Official Model | LV429413 (global part number) |
| Nome del prodotto | Undervoltage Release MN, Compact NSX, 125VCC, Screwless Terminal |
| Order Note | Must match corresponding breaker model, per esempio., NSX100N, NSX250F |
| Imballaggio | Individual package including release body, manual, mounting screws |
| EAN Code | 3606480019029 |
| MOQ | 1 piece |
- Engineering Implementation
- Verifica di compatibilità
Confirm breaker model: only for Compact NSX (100-630UN), PowerPact Multistandard, EasyPact CVS
Verify control voltage: strictly 125VDC, not for AC or other DC voltages
Ensure front slot available for MN/MX accessories
- Passaggi di installazione
- Disconnect main and control power to the breaker
- Remove front accessory cover
- Insert undervoltage release into slot and engage mechanical interlock
- Secure with supplied screws
- Wire 125VDC with correct polarity
- Refit cover and perform functional test
- Messa in servizio
Trip test: reduce voltage below 43VDC; breaker must trip automatically
Reset test: restore voltage above 106VDC; breaker should close normally
Interlock check: breaker cannot be manually closed when release is activated until voltage recovers
- Elenco completo dei modelli (MN Series Undervoltage Releases)
| Modello | Tensione nominale | Tipo di terminale | Compatible Series | Osservazioni |
| LV429400 | 24VAC/DC | Screw Terminal | NSX/CVS | Standard |
| LV429401 | 48VAC/DC | Screw Terminal | NSX/CVS | Standard |
| LV429402 | 110VAC/DC | Screw Terminal | NSX/CVS | Standard |
| LV429403 | 220VAC/DC | Screw Terminal | NSX/CVS | Standard |
| LV429410 | 24VCC | Screwless Terminal | NSX/CVS | Spring Terminal |
| LV429411 | 48VCC | Screwless Terminal | NSX/CVS | Spring Terminal |
| LV429412 | 110VCC | Screwless Terminal | NSX/CVS | Spring Terminal |
| LV429413 | 125VCC | Screwless Terminal | NSX/CVS | Spring Terminal |
| LV429414 | 220VCA | Screwless Terminal | NSX/CVS | Spring Terminal |
| LV429415 | 230VCA | Screwless Terminal | NSX/CVS | Spring Terminal |
- Risks & Warnings
- Corrispondenza della tensione: This model is only for 125VDC control circuits. Applying AC or incorrect DC voltage will burn the coil and damage the unit.
- Polarità: DC polarity must be observed; reversed connection causes failure or circuit damage.
- Overcurrent Protection: Install 1A fast-acting fuse in control circuit to protect coil.
- Interblocco meccanico: Ensure reliable engagement; Altrimenti, false tripping or failure to trip may occur.
- Ambient Limits: Do not use above +70°C or below -25°C to avoid performance degradation.
- Manutenzione: Regularly check control voltage stability (85%-110% of rated) to prevent excessive mechanical wear from frequent undervoltage tripping.
