Chint NEG3-62020 32A

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 contacteur). 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.

1. Paramètres techniques de base (Authoritative Specifications)

1. 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);

32UN: Rated operating current (core selection parameter).

III. Installation Dimensions and Fixing Methods (Precise Adaptation for Distribution Cabinets/Air Conditioner Installations)

1. Scénarios d'application de base (Precise Demand Matching)
2. 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.
3. Commande de moteur triphasé: Used in conjunction with AC contactors (par ex., CJX2-3222) to provide end-of-line leakage protection for three-phase motors ≤32A and prevent electric shock accidents.
4. 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.
5. Renovation and upgrading: Replacement for old three-phase RCDs, compatible with 86-type junction boxes without the need for re-drilling.
6. Key Selection and Replacement Solutions (Engineering Procurement Guide to Avoid Pitfalls)
7. Comparison of Models in the Same Series (Select as Required)

2. Cross-series Replacement Solutions (Flexible System Adaptation)

1. Practical Key Points for Installation and Operation & Entretien (Engineering Implementation Guide)
2. Junction box selection: A standard metal/plastic 86-type junction box must be used to ensure firm installation and good heat dissipation.
3. 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).
4. Torque control: The torque of terminal blocks is 2.0-2.5N·m to avoid heating caused by loose connections.
5. Testing requirements: Après l'installation, press the “TEST” button to test the leakage protection function to ensure normal operation.
6. Maintenance cycle: Inspect once a quarter and press the “TEST” button to test once a year to ensure effective protection.
7. Troubleshooting:

Déclenchements fréquents: Inspect line insulation/load leakage, and reset after troubleshooting.

Pas de déclenchement: 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:

1. Precise adaptation: The combination of 30mA RCD and 32A rated current perfectly matches the requirements of 380V air conditioners/three-phase motors.
2. Installation facile: Universal compatibility with 86-type junction boxes, no special tools required.
3. Triple protection: Integrated protection against leakage, overload and short circuit for high safety and reliability.