STN3 Type Moulded Case Circuit Breaker

The STN3 type Moulded Case Circuit Breaker is a reliable and advanced solution for electrical protection in various applications. Its compact design, comprehensive protection features, and communication capabilities make it an ideal choice for modern electrical systems.

Model:STN3

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Product Description

Specifications	STN3 100				STN3 160				STN3 250				STN3 400				STN3 630
Frame Current (A)	100				160				250				400				630
Number of Poles	3		4		3		4		3		4		3		4		3		4
Ultimate Breaking Capacity (Icu, kA)	F	N		H	F	N		H	F	N		H	F	N		H	F	N		H
AC220/240V (kA)	85	90		100	85	90		100	85	90		100	40	85		100	40	85		100
AC380/415V (kA)	36	50		70	36	50		70	36	50		70	36	50		70	36	50		70
Rated Insulation Voltage	AC800V
Rated Working Voltage	AC690V
Rated Current, Thermal Tripping, TMD, A	63, 80, 100				80, 100, 125, 160				125, 160, 200, 250				-				-
Rated Current, Electronic Tripping, MIC, A	40, 100				40, 100, 160				100, 160, 250				250,				250, 400,
													400				630
Auxiliary, Alert, Fault Accessories	OF/SD/SDE/SDx
Shunt & Under Voltage Coil	MX/MN
Mechanical Life	50000				40000				20000				15000				15000
Electric life	30000				20000				10000				6000				4000

Model NO.	STN3
STANDARD:	IEC 60947-2
Arc-extinguishing Medium	Air
Structure	MCCB
Type	Moulede case Circuit Breaker
Certification	CE
Approvals	CE,ISO9001
Delivery Time	Within 20days
Specification	63A-630A
Origin	Wenzhou Zhejiang
Production Capacity	2000pieces/Week
Speed	Normal Type Circuit Breaker
Installation	Fixed
Poles Number	3P 4P
Function	Conventional Circuit Breaker, Circuit-Breaker Failure Protection, Overcurrent Protection
Price	Factory Price
Warranty Time	12months
Transport Package	Inner Box/Carton
Trademark	SONTUOEC,WZSTEC,SONTUNE,IMDEC
HS Code	8536200000

Key Features

• Protection and Functionality: These breakers offer comprehensive protection for electrical systems, including overload and short-circuit protection. They are designed to automatically disconnect the circuit when a fault occurs, preventing damage to equipment and ensuring safety.

• Shell Current and Rated Current: The shell current (e.g., 160N) indicates the maximum expandable interrupting capacity of the breaker's housing. The rated current (e.g., 100A) is the maximum normal operating current the circuit should not exceed to prevent tripping due to overcurrent.

• Pole Configurations: Available in 3-pole (3P) and 4-pole (4P) configurations, suitable for different electrical systems and applications.

• Electronic Trip Units: Advanced electronic trip units provide precise measurement and communication capabilities, allowing for real-time monitoring and diagnostics of electrical parameters.

• Compact Design: The Compact NSX series, in particular, is known for its compact design, which combines energy efficiency, measurement, management, and communication tools.

Applications

• Industrial Use: Widely used in industrial settings for distributing and protecting electrical power to various equipment and machinery.

• Energy and Infrastructure: Suitable for applications in energy distribution networks and infrastructure projects.

• Commercial and Residential: Also used in commercial buildings and residential homes for main and secondary distribution systems.

Additional Features of the Compact NSX Series

• Enhanced Protection: Features such as double-rotation contacts and energy tripping ensure reliable protection against faults.

• Selective Coordination: Improved selectivity helps maintain continuity of power supply to unaffected circuits during faults.

• Communication Capabilities: Modbus communication module and BSCM (Breaker Status Control Module) enable data transmission between the circuit breaker and a supervisory system.

• Display and Monitoring: The "Ready" LED and other indicators provide real-time status information, while the FDM121 cabinet door display unit can show various measured parameters.

• Maintenance and Configuration: Maintenance indicators show wear on contacts, load profiles, and operation counts, aiding in predictive maintenance.

Installation and Maintenance

• Installation: Follow the manufacturer's instructions for proper installation, ensuring minimum clearances and using appropriate mounting hardware.

• Maintenance: Regular inspection and testing of the circuit breakers are recommended to ensure they function correctly and provide continuous protection.

STN3 Type Moulded Case Circuit Breaker