Schneider Electric Compact NSX160N

Schneider Electric’s ComPacT NSX160N is a high-performance Molded Case Circuit Breaker (MCCB), primarily used for overload protection, protection contre les courts-circuits, and isolation functions in low-voltage power distribution systems.

1. Basic Parameters and Design

Frame Current: 160UN (adjustable range: 112-160UN)

Capacité de coupure: Class N (50le), suitable for 380-415V AC systems; up to 90kA at 220V, and reduced to 10kA at 690V

Numéro de pôle: 3P or 4P (In the 4P model, the neutral wire (N) is located on the left; the 3D design indicates that the N wire is not involved in protection)

Tension nominale: 690V et (50/60HZ), meeting the power distribution needs of most industrial and commercial applications

Trip Unit Type: TMD (Thermomagnetic Trip Unit), providing overload (L) and short-circuit (je) protection, including:

Protection contre les surcharges (Ir): Adjustable range of 0.7-1×In (160UN)

Protection contre les courts-circuits (Ii): Fixed value of 1250A (environ 7.8 fois le courant nominal)

1. Structure and Installation

Méthode d'installation: Supports fixed, plug-in, and withdrawable mounting, enabling flexible adaptation to different cabinet designs

Dimensions hors tout:

4Modèle P: Width 140mm × Height 161mm × Depth 86mm, weight 2.6kg

3Modèle P: The width may be narrower (105mm according to some data), and confirmation is required based on the specific model

Connection Method: Front connection design, with a terminal spacing of 35mm, supporting horizontal or vertical installation

III. Functions and Certifications

Fonctions de protection:

Basic type: Provides long-time overload (L) and instantaneous short-circuit (je) protection, complying with the IEC 60947-2 standard

Optional expansion: Leakage protection, undervoltage tripping, remote control (par ex., MX/MN coils) can be realized by adding modules

Fonction d'isolement: Complies with the EN/IEC 60947-2 standard and can be used as an isolator

Adaptabilité environnementale:

Température de fonctionnement: -25°C à +70°C, humidity ≤95% (pas de condensation)

Certifications: CCC, EAC, Marine certifications, suitable for industrial, commercial, and marine environments

1. Scénarios d'application

Power Distribution Systems: Used as a main switch or branch switch to protect circuits for motors, éclairage, and mixed loads

Contrôle industriel: Cooperates with devices such as contactors and relays to build automatic control circuits

Renewable Energy: Suitable for overcurrent protection in distributed generation systems such as solar energy and wind energy

1. Replacement and Upgrading

Replacement Models: Pour un pouvoir de coupure plus élevé, NSX160H (70le) or NSX160L (100le) peut être sélectionné

Digital Upgrading: The new generation of ComPacT NSX series (par ex., NSX160N-D) supports the EcoStruxure Power architecture and can integrate functions such as wireless monitoring, energy metering, and service life prediction

1. Recommandations de sélection
2. Correspondance actuelle: Calculate the rated current (Dans) based on the load, and ensure that the trip unit setting covers the normal operating current
3. Capacité de coupure: Select the breaking capacity class (N/H/L) according to the short-circuit current level at the installation location
4. Accessory Expansion:

Auxiliary Contact (OF): Used to indicate the status of the circuit breaker

Motorized Operating Mechanism (MT): Enables remote switching on and off

Leakage Module (Vigi NSX): Provides residual current protection

VII. Précautions

Spécifications d'installation: Must comply with IEC 60947-2 and local electrical installation standards, and ensure that the terminal torque meets the requirements

Recommandations d'entretien: Regularly inspect the contact wear condition; clean the arc-extinguishing chamber and test the tripping characteristics every 2-3 années