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• • • • • • • • • • • • • • SCHNEIDER NSX250S ComPact NSX Molded Case Circuit Breaker

                            The SCHNEIDER NSX250S is a ComPact NSX molded case circuit breaker (MCCB) with a 250 A frame rating. The standard AC version is a 3-pole, 690 VAC basic frame with a 100 kA ultimate short-circuit breaking capacity at 380/415 VAC. The exact protection characteristics depend on the installed trip unit.

                            Important: “NSX250S” is a frame/range designation, not a complete specification by itself. Different versions can have different poles, trip units, connections and AC/DC ratings.

                            Key Technical Specifications

                            Parameter	Specification
                            Brand	Schneider Electric
                            Model	NSX250S
                            Product Family	ComPact NSX
                            Product Type	Molded Case Circuit Breaker
                            Frame Rating	250 A
                            Standard AC Version	3P
                            Rated Operational Voltage	Up to 690 VAC, 50/60 Hz
                            Icu	100 kA @ 380/415 VAC
                            Icu @ 220/240 VAC	Up to 120 kA
                            Icu @ 440 VAC	Up to 90 kA
                            Icu @ 500 VAC	Up to 65 kA
                            Icu @ 525 VAC	Up to 40 kA
                            Icu @ 660/690 VAC	Up to 15 kA
                            Utilization Category	Category A
                            Suitability for Isolation	Yes
                            Mounting	Fixed / configuration dependent
                            Trip Unit	Depends on specific configuration
                            Application	Electrical Distribution / Circuit Protection

                            Schneider's current C25S3 version confirms the 250 A frame, 3-pole configuration, 690 VAC rating and 100 kA Icu at 380/415 VAC.

                            Advantages & Features

                            • High 100 kA short-circuit breaking capacity at 380/415 VAC
                            • Compact MCCB design for industrial distribution
                            • 250 A frame size
                            • Suitable for high-current distribution circuits
                            • Wide range of compatible thermal-magnetic and electronic trip units
                            • Suitable for fixed or other configurations depending on the exact reference
                            • Compatible with various ComPact NSX accessories
                            • Designed for industrial and commercial power-distribution systems

                            Typical Applications

                            • Industrial distribution panels
                            • Factory electrical systems
                            • Motor feeder protection
                            • Building power distribution
                            • Switchboards
                            • Power distribution equipment
                            • Industrial automation panels
                            • Generator and utility distribution systems

                            Important Precautions

                            • Verify the complete catalog number before installation. NSX250S alone does not specify the trip unit or exact configuration.
                            • Confirm whether the breaker is 3P or 4P.
                            • Verify the installed trip unit's current setting and protection functions.
                            • Check the actual system voltage and prospective short-circuit current.
                            • Do not assume the 250 A frame means the breaker is always set to 250 A.
                            • Use the correct Schneider accessories and terminals for the specific configuration.
                            • Disconnect and properly isolate the circuit before installation or maintenance.

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