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NM1LE-250S-4300-200A is a moulded case residual current circuit breaker (RCCB/MCCB with earth leakage protection) from CHINT (NM1LE Series).
- Full Model Explanation
NM1LE: Código da série
N: CHNT company code
M: Moulded case circuit breaker
1: Design sequence
O: With earth leakage / proteção de corrente residual
250: Frame rating current 250A (maximum frame current for this series)
S: Classe de capacidade de ruptura (Tipo padrão, ultimate breaking capacity Icu=30kA)
4300: Poloneses & funções
4: 4 postes (3P+N)
3: Thermal-magnetic trip with overload + proteção contra curto-circuito
00: No accessory trips (no undervoltage, no shunt trip)
200UM: Rated operational current In=200A (continuous permissible current)
- Principais parâmetros técnicos (NM1LE-250S/4300 200A)
| Item | Valor |
| Tensão operacional nominal Ue | AC 400V/415V (3-fase 4 fios) |
| Tensão nominal de isolamento Ui | 800V |
| Tensão nominal suportável de impulso Uimp | 8kV |
| Frequência nominal | 50Hz |
| Ultimate breaking capacity Icu | 30o (Type S standard) |
| Service breaking capacity Ics | 15o |
| Característica da viagem | Termomagnético (distribution type) |
| Rated residual operating current IΔn | 50mA / 100mA / 200mA (3 adjustable steps) |
| Residual operating time | Standard type ≤ 0.1s (time‑delay optional) |
| Número de pólos | 4P (Pole N type A: no overcurrent trip, always closed) |
| Montagem | Tipo fixo (front connection mainly) |
| Applicable standards | GB/T 14048.2, CEI 60947-2 |
- Principais Funções
- Proteção contra sobrecarga: Thermal trip delays and trips when current exceeds 200A.
- Proteção contra curto-circuito: Magnetic trip operates instantly within 30kA short-circuit current.
- Corrente residual (vazamento de terra) proteção: Detects current imbalance between phase and neutral; trips quickly at set values (50/100/200mA) to prevent electric shock and electrical fires.
- Infrequent switching: Can be used as a main switch for circuits and equipment.
- Aplicações Típicas
3-phase 4-wire distribution systems, equipamentos industriais, construção de distribuição de energia, construction temporary power, main circuits in shopping malls and factories, and other occasions requiring earth leakage + sobrecarga + short-circuit triple protection.
Complete Technical Data Sheet
CHINT NM1LE-250S/4300 200A
All parameters are from CHINT official catalog and manual, applicable to NM1LE-250S/4300 200A (4-pole moulded case residual current circuit breaker).
- Basic Identification Parameters
| Item | Valor-chave | Notas |
| Full product name | Moulded case residual current circuit breaker (disjuntor de fuga à terra) | Distribution protection type |
| Brand/Series | CHINT / NM1LE Series | Upgraded first generation |
| Full model | NM1LE-250S/4300 200A | Standard front connection, no accessory trips |
| Frame rating current | 250UM | Max rated current supported by this frame |
| Rated operational current In | 200UM | Long‑term permissible operating current |
| Poloneses | 4 postes (3P+N) | Pole N has no overcurrent trip, always closed |
| Classe de capacidade de ruptura | Tipo S (Padrão) | Tipo H (high breaking) available for same frame |
| Tipo de viagem | Viagem termomagnética | Long‑time delay overload + instantaneous short‑circuit protection |
| Conformidade | GB/T 14048.2, CEI 60947-2 | CCC certified |
- Main Circuit Electrical Parameters
| Item | Valor-chave | Notas |
| Tensão operacional nominal Ue | AC 400V/415V | For 3-phase 4-wire systems |
| Tensão nominal de isolamento Ui | 800V | Tensão máxima suportável de isolamento |
| Tensão nominal suportável de impulso Uimp | 8kV | Surge & lightning overvoltage capability |
| Frequência nominal | 50Hz | For domestic mains power systems |
| Rated ultimate short-circuit breaking capacity Icu (AC400V) | 30o | Max safe breaking short-circuit current |
| Rated service short-circuit breaking capacity Ics (AC400V) | 15o | Can continue normal operation after breaking |
| Arc distance | ≤100mm | Max arc flash during short-circuit breaking |
| Conexão | Conexão frontal (padrão) | Conexão traseira & tipo de plug-in opcional |
| Main terminal torque | 12N·m | For M8×16 terminal screws |
| Recommended copper conductor | ≥70mm² (solid) / 120mm² (stranded) | Copper busbar / cable recommended |
- Características de proteção
| Item | Valor-chave | Notas |
| Proteção contra sobrecarga (viagem termal) | Non-tripping at 7.2In; trips within 1h at 1.3In | Reference temp +30°C, inverse time delay |
| Proteção contra curto-circuito (viagem magnética) | Instantaneous setting 12In (2400UM) | Distribution type, reliable at 120% setting |
| Funções de proteção | Sobrecarga, curto-circuito, corrente residual (vazamento de terra) | Can be used for infrequent circuit switching |
| Inlet/outlet | Top inlet, bottom outlet (padrão) | Reverse connection strictly prohibited |
- Earth Leakage Protection Parameters
| Item | Valor-chave | Notas |
| Rated residual operating current IΔn | 50mA / 100mA / 200mA, 3 adjustable steps | DIP switch on device |
| Rated residual non-operating current IΔn0 | 0.5×IΔn | Threshold to avoid nuisance tripping |
| Residual operating time (padrão) | ≤0,1s (fast type) | Trips within 100ms on earth fault |
| Earth leakage type | Tipo CA | Reliable for sinusoidal AC residual current |
| Test circuit | Built-in test circuit | With test button; test at least monthly |
| Earth fault indication | Red mechanical indicator | Pops out after earth leakage trip |
- Ambiental & Parâmetros Mecânicos
| Item | Valor-chave | Notas |
| Operating ambient temperature | -5℃ ~ +40 ℃ | Derate required beyond this range |
| Temperatura de armazenamento | -25℃ ~ +70 ℃ | Non-energized storage |
| Altitude | ≤2000m | Derate for higher altitude |
| Grau de poluição | 3 | Suitable for industrial distribution |
| Categoria de instalação | III | For distribution circuits and main equipment circuits |
| Proteção de entrada | IP30 (except terminals) | Solid foreign object protection, não à prova d'água |
| Resistência mecânica | 10,000 operações | No-load operating cycles |
| Resistência elétrica | 4,000 operações | Na carga nominal |
| Orientação de montagem | Vertical or horizontal mounting allowed | Inverted mounting not permitted |
- Dimensões (4-pólo, unidade: milímetros)
| Dimensão | Valor | Notas |
| Width W | 188 | Total width of 4-pole unit |
| Height L | 165 | Including terminals |
| Depth H | 102 | Body thickness |
| Horizontal mounting hole spacing | 140 | Center-to-center left-right |
| Vertical mounting hole spacing | 126 | Center-to-center up-down |
| Mounting hole diameter Ød | 4.5 | For M4 mounting screws |
| Minimum clearance | ≥25mm side, ≥5mm top/bottom | For side-by-side installation |
Alternative Models from Other Brands
All below match the core specification:
4 postes (3P+N), 250Um quadro, 200Uma corrente nominal, Icu ≥30kA at AC400V, thermal-magnetic overload + proteção contra curto-circuito, AC-type earth leakage (50/100/200mA ajustável), no accessory trips, front fixed connection.
- Domestic High-Compatible Alternatives
(Dimensões, preço, function highly matched; ideal for direct replacement)
Marca Modelo de substituição Principais parâmetros de correspondência Descrição DELIXI CDM1LE-250/4300 200A Icu=30kA, 4P 200A, 50/100/200mA ajustável, termomagnético 1:1 design with NM1LE, high compatibility, sem modificação de gabinete DELIXI CDM3LS-250S/4300A 200A UTI=35kA, 4P 200A, adjustable leakage, termomagnético New upgraded series, maior desempenho TENGEN TGM1LE-250/4300 200A Icu=30kA, 4P 200A, 50/100/200mA ajustável Directly compatible with NM1LE Interruptor Changshu CM1L-250/4300 200A UTI=35kA, 4P 200A, adjustable leakage Industrial rade high reliability NADER NDM1L-250/4300 200A UTI=35kA, 4P 200A, adjustable leakage Stable for construction & industry HUYU HUM1LE-250/4300 200A Icu=30kA, 4P 200A, 3-step leakage Cost-effective direct replacement Joint-venture / Marcas Internacionais
(Higher performance for premium projects & severe conditions)
| Marca | Modelo de substituição | Principais parâmetros de correspondência | Descrição |
| Schneider | EZD250E4200ELN (integrated leakage) | Icu=36kA, 4P 200A, 30/100/300mA ajustável | Economic universal type |
| Schneider | NSX250N 4P 200A TM200D + Vigi NSX 250 | UTI=50kA, 4P 200A, multi‑range leakage | High‑end industrial grade |
| ABB | A2C250 TMF200/2000 4P integrated leakage | Icu=36kA, 4P 200A, adjustable leakage | Economic building distribution |
| ABB | Tmax T2N250 TMD200/2000 4P + RC221 | Icu=36kA, 4P 200A, multi‑range leakage | Heavy industrial & foreign projects |
| Siemens | 3VM1250-4ED32-0AA0 | Icu=36kA, 4P 200A, 30/100/300mA ajustável | Standard international type |
| Mitsubishi | NV250-SV 4P 200A | Icu=36kA, 4P 200A, 100/200/500mA ajustável | High reliability for precision equipment |
- Notas de substituição de chave
- Mounting dimension check: Modelos domésticos (CDM1LE, TGM1LE, etc.) are highly compatible with NM1LE for direct replacement. International brands often differ in size and hole spacing.
- Minimum breaking capacity: Icu at AC400V must be ≥30kA to ensure safety.
- Leakage matching: Prefer 50/100/200mA adjustable; use fast‑acting type ≤0.1s, not time‑delay.
- Poloneses & N-pole characteristic: Must be 4P (3P+N), with N-pole without overcurrent trip, always closed.
- Conformidade: All replacements must be CCC certified and comply with GB/T 14048.2 / CEI 60947-2.
