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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 contactor). It integrates triple protection against leakage, overload and short circuit, with a rated residual operating current of 30mA. Suitable for 3P ...

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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 contattore). 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. Parametri tecnici fondamentali (Authoritative Specifications)
ItemParameter ValueRemarks
Product TypeFixed Residual Current Operated Circuit Breaker (RCD)Custom design for air conditioners
ModelloNEG3-62020 32AComplete specification marking
Corrente operativa nominale32UNSuitable for loads ≤32A
Numero di poli3P (Three-phase)Breaks three-phase live wires
Tensione nominale400V e (Three-phase)Adapted to 380V air conditioning systems
Rated Residual Operating Current30mA (IΔn)Fast-acting type for personal safety
Capacità di interruzione6ILFor handling line short-circuit faults
Caratteristica di interventoTipo CSuitable for inductive loads (air conditioners/motors)
Vita meccanica≥10,000 operationsIndustrial-grade durability
Vita elettrica≥5,000 operationsMeets frequent on-off requirements
Protection ClassIP20For indoor installation environments
Grado di inquinamentoClass 2General industrial/commercial environments
Standard applicabiliGB/T 16917.1, CEI 61009-1Complies with national and international standards
  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)

Dimension ItemParameter Value (mm)Installation Requirements
Overall Dimension86*86*35Adapted to standard 86-type junction boxes
Mounting Hole Spacing60*604 M4 mounting holes
Metodo di installazioneSurface mounting with junction boxSpecial 86-type junction box required
Terminal BlockScrew compression typeAdapted to 10-16mm wires
Wiring DirectionTop in, bottom outComplies with electrical installation specifications
  1. Core Application Scenarios (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. Three-phase motor control: Used in conjunction with AC contactors (per esempio., 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, centri commerciali, 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)
ModelloCorrente nominaleApplicable ScenarioPrezzo di riferimento (2026)
NEG3-6202032UN3P air conditioners/32A three-phase equipmentCNY 25-40 per unit
NEG3-6203040UN3P air conditioners/40A three-phase equipmentCNY 30-45 per unit
NEG3-6204050UN3P air conditioners/50A three-phase equipmentCNY 35-50 per unit
  1. Cross-series Replacement Solutions (Flexible System Adaptation)
Demand TypeChint Recommended ModelReplacement Advantages
Standard distribution cabinet installationNXBLE-32 3P 32A 30mADIN rail mounting, adapted to distribution cabinet layout
Household/small-scale commercial useNB7LE-32 3P 32A 30mADimensioni compatte, adapted to lighting boxes
Contattore + RCD combinationCJX2-3222 + DZ47LE-3P 32AComplete motor control solution (controllare + protection)
Replacement for Siemens NEG3 contactorCJX2-32223-pole, 2 normalmente aperto + 2 normalmente chiuso, consistent installation dimensions, direct replacement without re-drilling
  1. Practical Key Points for Installation and Operation & Maintenance (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. Specifiche di cablaggio: 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: Dopo l'installazione, press theTESTbutton to test the leakage protection function to ensure normal operation.
  6. Maintenance cycle: Inspect once a quarter and press theTESTbutton to test once a year to ensure effective protection.
  7. Risoluzione dei problemi:

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:

  1. Precise adaptation: The combination of 30mA RCD and 32A rated current perfectly matches the requirements of 380V air conditioners/three-phase motors.
  2. Easy installation: 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.

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