Noark UL1066 ACB 3P 4P 800A-4000A
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CHINT NC1 4-Pole DC Coil Magnetic Contactor 25A-40A
CHINT NC1 4-Pole DC Coil Magnetic Contactor 25A-40A
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Chint NC1 4P 2NO+2NC Contactor
Chint NC1 4P 2NO+2NC Contactor

Noark UL1066 ACB 3P 4P 800A-4000A

Brand Name:Noark
Place of Origin:China
Model Number:A32
Rated Frequency (Hz):50/60Hz
Breaking Capacity:65kA 85kA 100kA
Rated Voltage:254V/508V/635V
Poles
Rated Current
SKU: 1600948639208 Category:
Description

Noark Electric UL1066 ACB A25 A32 A40 3 Pole 4 Pole 800A 1000A 1600A 2000A 2500A 3200A 4000A 3P 4P Power Air Circuit Breaker

   

Noark Electric’s A25, A32 and A40 family of UL1066 Listed and ANSI C37 compliant Power Circuit Breakers provide comprehensive ratings and exceptional quality to Low Voltage Switchgear and Power Distribution Equipment OEMs. A25, A32 and A40 breakers are designed to protect electrical systems up to 600 volts from overloads and short circuits and to provide equipment ground fault where specified. These breakers offer ampere ratings from 800A to 4000A in fixed-mount and draw-out configurations and have interrupting ratings up to 100kA at 600Vac.

 

Manufactured under world-class quality processes in our ISO9000 certified factory, these breakers deliver outstanding value in today’s competitive manufacturing environment.

 

Additional information
Weight 2 kg
Dimensions 25 × 25 × 25 cm
Rated Current

800A/1600A/2000A/2500A/3200A/4000A
Poles

3P
Technical Datasheet & Downloads

📄 Technical Documentation & Product Specifications

Download official engineering datasheets, certified test standards (IEC / UL / CE), wiring diagrams, and dimensional drawings for Noark UL1066 ACB 3P 4P 800A-4000A.

📥
Official Technical Datasheet (PDF) Complete electrical ratings, tripping characteristics, dimensions, and compliance specifications.
Request Official Datasheet (PDF)
📐
2D/3D CAD & Dimensional Drawings STEP, DXF, and PDF CAD drawing files for panel builders and switchgear designers.
Request CAD Model
Certified Standards: IEC 60898-1, IEC 60947-2, CE, RoHS, ISO 9001:2015
Manufacturer: Shanghai Newtrend Electric Co., Ltd. (Global Export Compliance)
Engineering Support: 24-hour response for custom voltage ratings, auxiliary contacts, and technical consulting.
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?

A

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?

A

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

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?

A

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?

A

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.