コンタクタ,サーキットブレーカー,ソーラーインバーター,電気メーター,太陽電池
This is a CHINT NM1LE series 800A moulded case earth leakage サーキットブレーカー with triple protection: 過負荷, short-circuit and earth leakage. It has S-class breaking capacity (36kA@400V), 4-pole fixed installation, and adjustable rated residual operating current (30–500mA). It is widely used for personal electric shock protection and earth fault protection in industrial power distribution, high-power motor circuits and building electrical systems.
- Full Model Code Breakdown
| Section | Marking | Description | Technical Note |
| 1 | NM1LE | Product Series | MCCB with earth leakage protection (LE = Leakage) based on CHINT NM1 series |
| 2 | 800 | Frame rated current | Maximum frame current: 800あ |
| 3 | S | 遮断容量クラス | S-class standard breaking capacity, 36kA@400V, for general distribution |
| 4 | 4300 | Pole number + trip type | 4 極 (3Ph+N), thermomagnetic trip (300 = no undervoltage release) |
| 5 | 800あ | 定格電流 (で) | Continuous operating current: 800あ |
- Key Technical Parameters
| Item | 価値 | 備考 |
| Product type | NM1LE series MCCB with earth leakage protection | Classic CHINT series with international advanced technology |
| 定格絶縁電圧 (Ui) | 800V | Maximum continuous voltage for insulation parts |
| Rated operating voltage (うえ) | 400Vと (50Hz) | Standard for three-phase four-wire systems |
| 定格インパルス耐電圧 (Uimp) | 8kV | Withstand capability against transient high voltage |
| Ultimate breaking capacity (ICU) | 36kA@400V | S-class, suitable for general industrial & commercial use |
| Service breaking capacity (ＩＣＳ) | 50% ICU | Reusable after fault operation (GB 14048.2 compliant) |
| 定格電流 (で) | 800あ | Maximum continuous current |
| Trip characteristic | Thermomagnetic (inverse time overload + instantaneous short-circuit) | Overload: 0.8–1.0In adjustable; Instantaneous: 5–10In |
| Earth leakage parameters | Rated residual operating current (IΔn): 30/100/200/300/500mA optional | Provides both personal shock protection and earth fault protection |
| Residual non-operating current (IΔn0): 0.5IΔn | ||
| Operating time: ≤0.3s (≤30mA), ≤0.1s (>30ミリアンペア) | ||
| 極 | 4P (3Ph+N) | N pole for leakage detection only (not for short-circuit breaking except special versions) |
| Mounting type | 修理済み | Standard rail or bolt mounting; withdrawable not supported |
| Connection type | Front connection (標準) | Rear or plug-in connection optional |
| Degree of protection | IP30 | IEC 60529, protects against finger and solid foreign objects |
| 周囲温度 | -5℃ to +40℃ | Derate required beyond this range |
| 寸法 (mm) | 高さ×幅×奥行き: 360×240×180 | Standard industrial size for panel installation |
| 重さ | 約. 18kg | Includes leakage module; ~3kg heavier than standard NM1 |
- 代表的な用途
- Industrial power distribution systems
Main or sub-switch for three-phase four-wire 800A high-current circuits
Control circuits for large motors (例えば, 400kW induction motors) with full protection
Factories, データセンター, mines requiring personal safety protection
- Building electrical systems
Main switchboards and emergency power circuits in commercial and high-rise buildings
Public buildings such as hospitals and schools with high safety requirements
Power circuits for HVAC, pump rooms and large equipment to prevent electrical fires
- Special safety applications
Harsh environments: wet, ほこりっぽい, corrosive locations (chemical, textile plants)
Locations requiring high-level fire protection: warehouses, power distribution rooms
Heavy-duty equipment with frequent starts: cranes, コンプレッサー, to detect insulation failure
- Replacement Models
4.1 CHINT Upgrades / Replacements
| Replacement Model | Main Difference | 応用 |
| NM1LE800H-4300-800A | Breaking capacity upgraded to H-class (50kA@400V) | Systems with high short-circuit current near transformers |
| NM1LE800S-4308-800A | With motorized operator | Remote control, unattended automation systems |
| NXMLE800S-4300-800A | New Kunlun Series, 小さいサイズ, improved performance | System upgrades, new installations |
| NM1LE800S-4310-800A | With undervoltage release | Critical circuits requiring undervoltage protection (例えば, fire power) |
4.2 Cross‑Brand Equivalents
| ブランド | モデル | 主要なマッチングパラメータ | 注意事項 |
| ABB | T6N800 PR221DS-LSI+RCD 800 4P | In=800A, Icu=36kA, 4P, earth leakage | Electronic trip + leakage module, より高い精度 |
| シュナイダー | NSX800F TM800D+Vigi 4P | In=800A, Icu=36kA, 4P, thermomagnetic + leakage | Identical breaking capacity, reliable Vigi module |
| シーメンス | 3VA6880-6EL32-0AA0+3VA9180-0AA00 | In=800A, Icu=36kA, 3P+N, leakage add-on | 3VA series with leakage kit, similar performance |
| 三菱 | NF800-CW+leakage module 4P | In=800A, Icu=35kA, 4P, thermomagnetic + leakage | Japanese brand, suitable for Japanese-equipped systems |
- Selection & Application Notes
- Breaking capacity matching
Ensure short-circuit current ≤ 36kA@400V; otherwise use NM1LE800H (50の).
S-class breaking capacity decreases at higher voltages; recheck for 690V systems.
- Earth leakage current selection
Personal protection / wet areas: IΔn = 30mA
Equipment & fire protection: IΔn = 100–300mA
Motor & high-power loads: IΔn = 300–500mA to avoid nuisance tripping during startup.
- Poles and N‑pole configuration
4-pole for three-phase four-wire systems only; N wire must be connected.
N pole only detects leakage; it does not break short-circuit current (except special versions).
For interruptible N pole, select a special model with “N-pole breaking”.
- インストール & wiring
Fixed mounting; allow ≥180mm depth for heat dissipation.
Use copper busbar/cable rated for 800A: ≥240mm² cable or 40×10mm busbar recommended.
Must be installed vertically, tilt ≤15°.
- メンテナンス & replacement
Test leakage function monthly using the TEST button.
Inspect contacts after short-circuit operation; replace if necessary.
For upgrades, prefer CHINT NXMLE Kunlun Series (compatible dimensions, better performance).
Leakage module can be replaced separately.
CHINT NM1LE800S-4300-800A is a reliable 800A earth leakage MCCB with triple protection, standard breaking capacity and 4-pole design, ideal for industrial automation and building electrical systems. Selection should consider short-circuit level, leakage requirements and installation space. For better performance and safety, use higher-breaking versions or the new Kunlun series when applicable.
CHINT NM1LE800S-4300-800A – Key Selection Notes
- Breaking Capacity Check
This model: S-class = 36kA@400V
If short-circuit current >36の (near transformer, main incomer), use NM1LE800H (50の).
- Current Rating
Frame current 800A, rated current 800A
For continuous loads ≤800A only; do not overload.
- 極 & System Type
4300 = 4P (3Ph+N) + thermomagnetic trip
For three-phase four-wire (380V+N) systems only; N wire must be connected.
N pole does not break short-circuit current, only for leakage detection.
- Earth Leakage Selection
Available settings: 30/100/200/300/500ミリアンペア
Personal safety / wet areas: 30ミリアンペア
Equipment / fire protection: 100–300mA
Motors / high-power loads: 300–500mA (prevents startup nuisance tripping)
- Trip Characteristics
Thermomagnetic: 過負荷 + 瞬時短絡保護
Instantaneous range: 5–10In
Set higher for motors to avoid tripping during startup.
- インストール & Environment
Must be vertical, tilt ≤15°
Ambient: -5℃ to +40℃; derate at high temperature
IP20 open type; install in enclosure for dusty, wet or oily areas.
- Wiring & 放熱
Use 800A-rated conductors:
≥240mm² copper cable or 40×10mm copper busbar
Terminations must be tightly torqued to avoid overheating.
- メンテナンス & 安全性
Press TEST button monthly to verify leakage function.
Leakage module replaceable separately.
Not recommended for three-phase three-wire systems without neutral.
- Upgrade Recommendation
New CHINT NXMLE800S series: better performance, 小さいサイズ
Preferred for replacement or upgrade (dimensions nearly compatible).
