h2Chint NXB-125 3P C100 Automatic Circuit Breaker
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Chint NXB-125 3P C100 Automatic Circuit Breaker
1. Features
The CHINT NXB-125 3P C100 is a moulded case circuit breaker (MCCB) designed to switch and protect electrical systems against overload and short-circuit conditions.
The product has a rated current of 100A and a 3-pole configuration, making it suitable for three-phase 400V AC electrical systems.
The NXB-125 provides overload protection, short-circuit protection and positive circuit isolation, helping improve the safety and reliability of electrical systems.
It provides a rated ultimate short-circuit breaking capacity of 10kA Icu and a rated service short-circuit breaking capacity of 7.5kA Ics.
The product complies with IEC/EN 60947-2, making it suitable for electrical protection and switching applications in residential, commercial and industrial systems.
Its electrical life reaches 6,000 cycles, while its mechanical life reaches 20,000 cycles, supporting reliable long-term operation.
The rated impulse withstand voltage is 4kV, providing protection against specified electrical impulse conditions.
The 3-pole configuration makes the NXB-125 suitable for three-phase electrical systems, including distribution panels, industrial control cabinets and machinery power supply systems.
2. Specifications
Model: NXB-125 3P C100
Brand: CHINT
Product Type: MCCB – Moulded Case Circuit Breaker
Protection: Overload and short circuit
Rated Current: 100A
Number of Phases: 3-phase
Rated Voltage: 400V AC
Frequency: 50/60Hz
Rated Ultimate Short-Circuit Breaking Capacity Icu: 10kA
Rated Service Short-Circuit Breaking Capacity Ics: 7.5kA
Standard: IEC/EN 60947-2
Electrical Life: 6,000 cycles
Mechanical Life: 20,000 cycles
Rated Impulse Withstand Voltage Uimp: 4kV
Rated Power Consumption: 3.5W
Ambient Temperature: -35~70°C
Storage Temperature: -35~85°C
Maximum Installation Altitude: 5,000m
Protection Degree: IP20
Tripping Characteristic: C
According to CHINT, the NXB-125 series is available in 1P, 2P, 3P and 4P configurations. The 3P version is rated at 400V AC, 50/60Hz, with 10kA Icu, 7.5kA Ics and 4kV Uimp.
3. Applications
The CHINT NXB-125 3P C100 is used in three-phase electrical distribution systems requiring protection against overload and short-circuit conditions.
It is suitable for main distribution panels, electrical distribution cabinets, control cabinets and industrial electrical panels.
The breaker can be used to protect power supply lines for machinery, motors, compressors, production equipment and other electrical loads with suitable operating currents.
The NXB-125 is also suitable for factories, warehouses, commercial buildings, offices, shops and other electrical installations.
For motor loads or applications with high starting currents, the appropriate protection characteristic and coordination with other protective devices should be selected according to the actual system design.
It is particularly suitable for systems requiring a 3P 100A MCCB for overload and short-circuit protection. CHINT classifies the NXB-125 as an MCCB providing overload protection, short-circuit protection and positive isolation.
4. How to Use
Determine the system voltage, load current, number of phases and protection requirements before selecting the circuit breaker.
For the NXB-125 3P C100, the rated current is 100A and it is intended for three-phase systems according to the electrical design.
Disconnect the power supply completely before installation or wiring.
Install the breaker according to the manufacturer's wiring diagram and technical instructions.
Check and properly tighten all electrical terminals to ensure stable electrical contact.
After installation, check the ON/OFF operation and commission the breaker according to electrical safety procedures.
Do not operate the device beyond its rated current or specified short-circuit breaking capacity.
Regularly inspect the terminals, enclosure and switching mechanism during operation.
Installation, inspection and maintenance should be performed by qualified electrical personnel.
5. FAQ
Question 1: What is the rated current of the CHINT NXB-125 3P C100?
Answer 1: The rated current is 100A.
Question 2: How many phases does the NXB-125 3P C100 support?
Answer 2: It is a 3P circuit breaker for three-phase systems. The 3P NXB-125 version is rated at 400V AC.
Question 3: Does the NXB-125 provide residual current protection?
Answer 3: No. The standard NXB-125 provides overload, short-circuit and isolation protection. A suitable RCCB or RCBO should be used when residual-current or electric-shock protection is required.
Question 4: What is the short-circuit breaking capacity?
Answer 4: The NXB-125 has 10kA Icu and 7.5kA Ics according to the CHINT specifications.
Question 5: Is the NXB-125 suitable for industrial electrical panels?
Answer 5: Yes. It is suitable for distribution panels, industrial electrical cabinets and three-phase power systems with appropriate load ratings.
Question 6: Is the NXB-125 an MCB?
Answer 6: CHINT classifies the NXB-125 as an MCCB – Moulded Case Circuit Breaker, while the NXB-125G is the MCB version.
Why Buy NXB-125 3P C100 from KingTech.vn?
🔹 Genuine product from CHINT-China – Guaranteed quality, directly imported.
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📞 Hotline: 0944 755 799
🌍 Website: KingTech.vn
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