CHINT NXA Series 3P/4P Air Circuit Breaker ACB 1600A-6300A

Name: CHINT NXA Series 3P/4P Air Circuit Breaker ACB 1600A-6300A
Brand: CHINT
SKU: 1769740819230629888

Brand Name:Chint
Place of Origin:China
Model Number:NXA
Protection:Other
Breaking Capacity:20kA – 100kA
Rated Voltage:380V – 690V
Type:Air

Model

Type

Poles

Rated Current (A)

SKU: 1769740819230629888 Category: Others

Description

Chint NXA air circuit breaker is designed for low-voltage power distribution systems and provides reliable protection for circuits and equipment against overload,
short circuit, under-voltage, and related fault conditions. The NXA series is widely used in switchgear, industrial distribution panels,
commercial power systems, and infrastructure projects that require stable high-current ACB protection.

Technical Specifications

Parameter	Specification
Model Series	NXA
Type	Air Circuit Breaker (ACB)
Frame Size	1600A / 2000A / 3200A / 4000A
Rated Current Options	1000A / 1600A / 2000A / 2500A / 3200A / 4000A / 5000A / 6300A
Breaking Capacity	20kA – 100kA
Rated Operational Voltage	380V / 400V / 415V, 440V / 525V / 690V AC
Pole Number	3P / 4P
Installation Method	Draw-out type / Fixed type
Protection Grade	Front IP20 / Other side IP00
Operating Temperature	-5℃ to +40℃; extended versions: -45℃ to +70℃ (M/A), -20℃ to +70℃ (P/H/CD-1)
Storage Temperature	-45℃ to +70℃
EMC Standard	IEC/EN 60947-2 Annex F

Additional information

Weight	100 kg
Dimensions	100 × 100 × 100 cm
Model	NXA16, NXA20, NXA32, NXA40, NXA63
Rated Current (A)	400A, 630A, 800A, 1000A, 1250A, 1600A, 2000A, 2500A, 3200A, 3600A, 4000A, 5000A, 6300A
Poles	3P, 4P
Type	Fixed, Drawout

Technical Datasheet & Downloads

📄 Technical Documentation & Product Specifications

Download official engineering datasheets, certified test standards (IEC / UL / CE), wiring diagrams, and dimensional drawings for CHINT NXA Series 3P/4P Air Circuit Breaker ACB 1600A-6300A.

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Official Technical Datasheet (PDF) Complete electrical ratings, tripping characteristics, dimensions, and compliance specifications.

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2D/3D CAD & Dimensional Drawings STEP, DXF, and PDF CAD drawing files for panel builders and switchgear designers.

Technical FAQ & Selection Guide

💡 Frequently Asked Technical Questions & Selection Guide

Pure engineering specifications, tripping curve parameters, and electrical selection guidance for panel builders and system designers.

Trip Unit Protection

How to choose between Thermal-Magnetic (TMD) and Electronic (Micrologic) trip units?

Thermal-magnetic trip units provide fixed or adjustable bimetallic overload and electromagnetic instantaneous short-circuit protection, ideal for standard industrial power distribution. Electronic microprocessor trip units offer precise digital dials for L (Long-time delay overload), S (Short-time delay short-circuit), I (Instantaneous short-circuit), and G (Ground-fault protection), delivering total time-current selectivity in modern switchgear.

Ics vs Icu Capacity

What is the technical distinction between Ultimate (Icu) and Service (Ics) breaking capacity?

Icu represents the absolute maximum fault current the breaker can safely interrupt, after which inspection or replacement may be needed. Ics represents the operational breaking capacity (50%, 75%, or 100% of Icu) that the breaker can clear repeatedly and remain fully operational without performance degradation. In critical healthcare, data center, and continuous industrial applications, specify breakers with Ics = 100% Icu.

3P vs 4P Neutral

When should a 4-Pole (4P) MCCB be specified instead of a standard 3-Pole (3P) MCCB?

A 4P breaker with a switched neutral is required in systems with dual power sources (generator / utility ATS transfer) to prevent circulating neutral currents, in IT distribution networks, and in commercial installations with heavy non-linear harmonic loads (LED drivers, variable speed drives) where neutral conductor current can exceed phase currents.

Motorized & Remote Operation

How to select manual rotary handles vs motorized electric operating mechanisms?

Direct or extended door rotary handles are specified when the MCCB is enclosed inside switchgear cubicles, providing padlocking and door-interlock safety. Motor operating mechanisms (electric operators) are required for automated SCADA control, remote PLC open/close operations, and automatic transfer switch (ATS) integration.

Terminal & Mounting Options

What terminal connection hardware and mounting configurations are available?

Standard front connection lugs accept copper or aluminum compression terminals and busbar connections. For high-density panel boards, extended spreader terminals, rear connection studs, and plug-in / draw-out base cassettes are available to facilitate rapid maintenance and modular swap-out.