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1. Kernparameter und technische Eigenschaften
Grundlegende Spezifikationen
Poles: 3P (three poles), suitable for three-phase four-wire power distribution systems, capable of切断 three-phase power simultaneously.
Nennstrom: 20A (under AC-3 duty category, can protect approximately 11kW loads at 400V).
Auslösekurve: Typ C (instantaneous tripping at 5-10 mal dem Nennstrom), suitable for conventional loads such as lighting and sockets, and can withstand short-term inrush currents (z.B., fluorescent lamp startup).
Bruchkapazität: 6Die (400V und), meeting the short-circuit protection requirements of most low-voltage power distribution scenarios.
Elektrische Leistung
Rated Operating Voltage: 400V und, supporting 50/60Hz frequency.
Current Limiting Class: Klasse 3, which can quickly limit the rise of short-circuit current and reduce the risk of equipment damage.
Mechanisches Leben: 200,000 Operationen; Elektrisches Leben: 100,000 Operationen, ensuring long-term stability and reliability.
Umweltanpassungsfähigkeit
Betriebstemperatur: -35℃ to +70℃, suitable for harsh industrial environments.
Moisture and Heat Resistance: Klasse 2 (55℃, 95% relative humidity), suitable for use in humid areas.
2. Zertifizierungen und Standards
Inländische Zertifizierung: Passed CCC certification, compliant with GB10963.1 “Overcurrent Protection Leistungsschalter for Household and Similar Premises” Standard.
International Certification: CE certified, compliant with IEC 60898-1 “Overcurrent Protection Circuit Breakers for Household and Similar Premises” Standard, applicable to global markets.
Isolationsfunktion: The handle displays a green indicator when disconnected, meeting the isolation requirements of IEC 60947-2 to ensure maintenance safety.
3. Anwendungsszenarien
Industrielle Automatisierung: Used for short-circuit and overload protection in three-phase motor control circuits, cooperating with contactors to realize motor start-stop control.
Commercial Building Power Distribution: Protection for three-phase lighting systems, air conditioning units, and elevator power supplies in places such as shopping malls and office buildings.
Energy Infrastructure: Protection for output terminals of distributed energy equipment such as photovoltaic inverters and small generators.
Residential Three-Phase Incoming Line: Comprehensive protection of three-phase power for main distribution boxes in high-end residences or small factories.
4. Installation und Verkabelung
Installationsmethode: Supports 35mm standard DIN rail mounting, with a width of only 54mm (3 Stangen), saving distribution box space.
Verkabelungsspezifikationen
Hauptstromkreis: Supports 1-25mm² single-strand hard wires or 1-16mm² flexible wires (with terminals), tightening torque is 2.5N·m.
Terminal Type: Tunnel-type terminal design, anti-misoperation and firm wiring, suitable for quick construction.
5. Model Selection and Alternative Solutions
Same Series Alternatives
IC65N-3P/D20A: Type D curve (instantaneous tripping at 10-14 mal), suitable for impulsive loads such as motors.
IC65H-3P/C20A: Breaking capacity increased to 10kA, suitable for industrial scenarios with high short-circuit currents.
International Brand Alternatives
ABB S263-C20: Compatible parameters, similar installation dimensions, breaking capacity 6kA.
Siemens 5SJ6 320-C20: Kurve vom Typ C, breaking capacity 6kA, with overload alarm function.
6. Preis- und Kaufvorschläge
Market Reference Price: Etwa 25-30 yuan for single-pole, 70-90 yuan for 3P model (domestic channels in 2025).
Kaufkanäle
Official Authorized Distributors: Such as Schneider WhatsApp: 0086-13811255435
Vorsichtsmaßnahmen
– For leakage protection, it is necessary to match the Vigi IC65N module (z.B., A9D65232) to achieve 30mA leakage action protection.
– Derating is required in high-temperature environments (>40℃). It is recommended to consult the technical manual or Schneider engineers.
7. Wartung und Fehlerbehebung
Regelmäßige Inspektion
– Clean the oxide layer on the contact surface every 6 months to ensure good contact.
– Check the flexibility of the handle operation to avoid tripping failure caused by mechanical jamming.
Fehlerbehebung
Frequent Tripping: May be caused by overload, Kurzschluss, or loose wiring; need to check the load and线路 one by one.
Contact Ablation: If blackening or adhesion of contacts is found, the circuit breaker must be replaced in time to avoid fire risks.
Based on the above information, IC65N-3P/C20A has become one of the mainstream choices in the low-voltage power distribution field due to its high reliability, flexible expandability, und breite anwendbarkeit. In praktischen Anwendungen, a comprehensive evaluation based on load characteristics, environmental conditions, and installation space is required to ensure the safe and stable operation of the system.
