Chint Residual Current Protective Switch NEG3-62030

Chint Residual Current Protective Switch NEG3-62030 is a safety device specially designed for high-power household appliances.  

I. Core Parameters and Functions  

1. Basic Specifications  

Rated Current: 40A, suitable for high-power appliances such as 3-ton cabinet air conditioners and instant water heaters.  

Pole Count: 1P (controls only the live wire), requires connection with a neutral wire, and is applicable to 220V single-phase circuits.  

Residual Current Protection: When the residual current reaches 30mA, the power supply is quickly cut off within 0.1 seconds, complying with national standard safety requirements.  

Material and Safety: The shell is made of flame-retardant material (withstand temperature up to 850℃), and the internal terminal blocks use environment-friendly blue-white cores to avoid oxidation risks.  

2. Design Features  

One-to-One Protection: Only trips the circuit with residual current, without affecting the normal operation of other appliances.  

Installation Compatibility: Supports 86-type and 118-type back boxes; the 4-hole design on the back facilitates fixation.  

Anti-Dragging Design: The wire inlet at the bottom is equipped with a wire-pressing function to prevent wire loosening.  

II. Application Scenarios and Purchase Recommendations  

1. Typical Applications  

Special for Air Conditioners: The operating current of 3-ton and above cabinet air conditioners usually exceeds 16A, and the 40A specification ensures stable power supply.  

Water Heater Protection: The power of instant water heaters can reach 8-10kW, requiring matching high-current residual current protectors to avoid overload.  

Old Circuit Upgrading: The compact design is suitable for scenarios where the distribution box has limited space.  

2. Comparison of Alternative Models  

NEG3-62020 (32A): Suitable for ordinary air conditioners or small appliances, with a price approximately 20% lower.  

NXBLE Series (2P): If it is necessary to control both the live wire and neutral wire, NXBLE-63-2P-C40 (30mA residual current protection) can be considered, but the cost is relatively higher.  

III. Installation and Usage Guide  

1. Installation Steps  

Power-Off Operation: Turn off the main switch and verify no electricity before wiring.  

Wiring Method:  

  Live Wire (L): Connect the red wire to the left terminal.  

  Neutral Wire (N): Connect the blue wire to the right terminal.  

  Ground Wire (PE): Connect the yellow-green wire to the dedicated grounding terminal in the middle.  

Fixation and Testing: Tighten the screws with a screwdriver, insert into the back box and cover the panel, then press the "Test" button (T) to verify the tripping function.  

2. Precautions  

Wiring Standards: Ensure the stripped length of the wire end is appropriate (approximately 1cm) to avoid short circuits; do not misconnect the phase of the neutral wire.  

Environmental Requirements: The installation location should be dry and well-ventilated, away from heat sources and corrosive gases.  

Regular Maintenance: Press the "Test" button once a month, and check whether the wire connections are loose every 3 years.  

IV. Price and Purchase Channels  

1. Market Price  

Whatsapp: 0086-13811255435. The price is approximately 39.7-89.9 RMB, with differences resulting from promotional activities and packaging specifications (single piece or boxed).  

2. Authenticity Identification  

Anti-Counterfeiting Query: Verify the 3C certificate (Certificate No.: 2020980307001645) through the Chint official website or the QR code on the package.  

V. Troubleshooting and After-Sales Service  

1. Common Problem Handling  

Frequent Tripping: Check if the appliance has residual current (use a multimeter to detect whether the shell voltage is > 30V) or if the circuit is overloaded.  

Failure to Reset: Internal components may be damaged; contact after-sales service for replacement.  

VI. Summary  

With high cost-effectiveness and reliable performance, Chint NEG3-62030 has become an ideal protection solution for high-power household appliances. Its precise residual current protection, convenient installation design and high-temperature resistance can effectively reduce the risks of electric shock and fire. When purchasing, it is necessary to match the specification according to the appliance power and buy through formal channels to ensure authenticity. Ensure power is cut off before installation, and it is recommended to be completed by a certified electrician to ensure safety.