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
Chint NEG3-62020 32A: Complete Analysis of Residual Current Device for Air Conditioners (Including Selection/Replacement/Installation)
Core Positioning: Chint NEG3-62020 32A is a fixed residual current device (RCD) exclusively for three-phase air conditioners (not a 接触器). It integrates triple protection against leakage, overload and short circuit, with a rated residual operating current of 30mA. Suitable for 3P air conditioner/three-phase motor circuits, it features installation with 86-type junction boxes and is universally applicable in industrial and commercial scenarios.
- コア技術パラメータ (Authoritative Specifications)
| Item | Parameter Value | Remarks |
| Product Type | Fixed Residual Current Operated Circuit Breaker (RCD) | Custom design for air conditioners |
| モデル | NEG3-62020 32A | Complete specification marking |
| Rated Operating Current | 32あ | Suitable for loads ≤32A |
| 極数 | 3P (Three-phase) | Breaks three-phase live wires |
| 定格電圧 | 400Vと (Three-phase) | Adapted to 380V air conditioning systems |
| 定格残留動作電流 | 30ミリアンペア (IΔn) | Fast-acting type for personal safety |
| 遮断容量 | 6の | For handling line short-circuit faults |
| Tripping Characteristic | タイプC | Suitable for inductive loads (air conditioners/motors) |
| Mechanical Life | ≥10,000 operations | Industrial-grade durability |
| 電気的寿命 | ≥5,000 operations | Meets frequent on-off requirements |
| Protection Class | IP20 | For indoor installation environments |
| 汚染度 | Class 2 | General industrial/commercial environments |
| Applicable Standards | GB/T 16917.1, IEC 61009-1 | Complies with national and international standards |
- In-depth Interpretation of Model Coding (Quick Specification Identification)
The coding logic of `NEG3-62020 32A` is clear and unambiguous:
NEG3: Product series (3-pole series of RCDs exclusively for air conditioners);
6: Design serial number/function code (exclusive for air conditioners);
20: Rated residual operating current code (20 = 30mA, universal industry marking);
32あ: Rated operating current (core selection parameter).
Ⅲ. Installation Dimensions and Fixing Methods (Precise Adaptation for Distribution Cabinets/Air Conditioner Installations)
| Dimension Item | Parameter Value (mm) | インストール要件 |
| Overall Dimension | 86*86*35 | Adapted to standard 86-type junction boxes |
| Mounting Hole Spacing | 60*60 | 4 M4 mounting holes |
| 設置方法 | Surface mounting with junction box | Special 86-type junction box required |
| Terminal Block | Screw compression type | Adapted to 10-16mm wires |
| Wiring Direction | Top in, bottom out | Complies with electrical installation specifications |
- Core Application Scenarios (Precise Demand Matching)
- 3P air conditioner dedicated circuits: Triple protection against leakage, overload and short circuit for 380V three-phase cabinet air conditioners/central air conditioning terminals; the 30mA RCD ensures personal safety.
- Three-phase motor control: Used in conjunction with AC contactors (例えば, CJX2-3222) to provide end-of-line leakage protection for three-phase motors ≤32A and prevent electric shock accidents.
- Industrial/commercial equipment: Safety power supply protection for three-phase equipment such as water pumps, fans and small compressors, suitable for industrial plants, shopping malls, hotels and other premises.
- Renovation and upgrading: Replacement for old three-phase RCDs, compatible with 86-type junction boxes without the need for re-drilling.
- Key Selection and Replacement Solutions (Engineering Procurement Guide to Avoid Pitfalls)
- Comparison of Models in the Same Series (Select as Required)
| モデル | 定格電流 | Applicable Scenario | Reference Price (2026) |
| NEG3-62020 | 32あ | 3P air conditioners/32A three-phase equipment | 人民元 25-40 per unit |
| NEG3-62030 | 40あ | 3P air conditioners/40A three-phase equipment | 人民元 30-45 per unit |
| NEG3-62040 | 50あ | 3P air conditioners/50A three-phase equipment | 人民元 35-50 per unit |
- Cross-series Replacement Solutions (Flexible System Adaptation)
| Demand Type | Chint Recommended Model | Replacement Advantages |
| Standard distribution cabinet installation | NXBLE-32 3P 32A 30mA | DIN rail mounting, adapted to distribution cabinet layout |
| Household/small-scale commercial use | NB7LE-32 3P 32A 30mA | Compact size, adapted to lighting boxes |
| コンタクタ + RCD combination | CJX2-3222 + DZ47LE-3P 32A | Complete motor control solution (control + protection) |
| Replacement for Siemens NEG3 contactor | CJX2-3222 | 3-pole, 2 通常は開いています + 2 通常は閉まっている, consistent installation dimensions, direct replacement without re-drilling |
- Practical Key Points for Installation and Operation & メンテナンス (Engineering Implementation Guide)
- Junction box selection: A standard metal/plastic 86-type junction box must be used to ensure firm installation and good heat dissipation.
- Wiring specifications: Connect three-phase live wires in the order of L1, L2 and L3; the neutral wire does not pass through the 3P RCD (must be connected to the N-terminal block separately).
- Torque control: The torque of terminal blocks is 2.0-2.5N·m to avoid heating caused by loose connections.
- Testing requirements: インストール後, press the “テスト” button to test the leakage protection function to ensure normal operation.
- Maintenance cycle: Inspect once a quarter and press the “テスト” button to test once a year to ensure effective protection.
- トラブルシューティング:
Frequent tripping: Inspect line insulation/load leakage, and reset after troubleshooting.
No tripping: Inspect for damaged RCD or incorrect wiring, and replace or rectify in a timely manner.
Summary and Selection Suggestions
Chint NEG3-62020 32A is a specialized RCD for 3P air conditioner circuits with the following core advantages:
- Precise adaptation: The combination of 30mA RCD and 32A rated current perfectly matches the requirements of 380V air conditioners/three-phase motors.
- Easy installation: Universal compatibility with 86-type junction boxes, no special tools required.
- Triple protection: Integrated protection against leakage, overload and short circuit for high safety and reliability.
