CHINT AL-X3 Alarm Auxiliary Contact for NXB-125 MCB

Name: CHINT AL-X3 Alarm Auxiliary Contact for NXB-125 MCB Accessories
Brand: CHINT

Description

CHINT AL-X3 is an original CHINT breaker accessory designed for NXB-125 applications. It is suitable for low-voltage power distribution panels, switchboards and OEM assemblies that require reliable accessory functions and clean panel integration.

1. Product overview

The AL-X3 is used as a CHINT MCB accessory for final power distribution applications. It is suitable for industrial panels, commercial electrical systems and project purchasing requirements.

2. Main features

Original CHINT AL-X3 accessory
Product type: Alarm Auxiliary Contact
Compatible with NXB-125
Compact design for panel assembly
Suitable for low-voltage distribution and OEM applications

3. Technical and application notes

Please confirm the compatible breaker series, installation method and project requirement before ordering. If your project needs exact matching with CHINT accessories, we can help confirm the correct model based on your breaker type and market requirement.

4. Typical applications

Final power distribution panels
Commercial electrical switchboards
Industrial control cabinets
OEM panel assemblies
Wholesale and project procurement

5. Ordering support

If you need help confirming compatibility, send us the breaker model, pole configuration and application target. We can help recommend the correct CHINT accessory model for your order.

6. Product catalog

Technical Datasheet & Downloads

📄 Technical Documentation & Product Specifications

Download official engineering datasheets, certified test standards (IEC / UL / CE), wiring diagrams, and dimensional drawings for CHINT AL-X3 Alarm Auxiliary Contact for NXB-125 MCB Accessories.

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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.

Curve Selection

How to choose between Tripping Curves B, C, and D for this miniature circuit breaker?

Curve B trips at 3–5 In (designed for resistive loads, electric heating, and domestic appliances with negligible inrush). Curve C trips at 5–10 In (the standard international choice for residential and commercial lighting, socket outlets, and small induction motors). Curve D trips at 10–14 In (specifically engineered for high-inrush inductive equipment such as industrial transformers, heavy motors, compressors, and welding circuits).

Breaking Capacity

How do I determine whether 6kA or 10kA breaking capacity is required for my installation?

Breaking capacity (Icn/Icu) must exceed the calculated prospective short-circuit fault current at the installation point. 6kA (IEC 60898-1) is standard for residential consumer units and sub-distribution branch circuits located downstream. 10kA (IEC 60947-2) is required for industrial facilities, main switchboards, commercial distribution panels, or circuits situated close to supply transformers where fault levels are high.

Poles & Neutral Isolation

How to choose the correct number of poles (1P, 1P+N, 2P, 3P, 3P+N, 4P) for single-phase and three-phase circuits?

For single-phase 230V circuits: 1P provides active phase protection; 1P+N or 2P isolates both live and neutral lines simultaneously (essential for TT earthing systems and sensitive sub-panels). For three-phase 400V systems: 3P protects balanced 3-wire motor loads; 3P+N or 4P is required for 4-wire mixed single-phase loads to ensure complete neutral disconnection during isolation.

DC vs AC Application

Can this circuit breaker be used in DC circuits (Solar PV, Battery Storage, Telecom)?

Standard AC breakers cannot safely extinguish DC arcs due to the absence of natural zero-crossing current. For DC circuits (60V to 1000V DC), select specialized DC breakers (such as DZ158-125 DC or NM8NDC series) equipped with permanent magnetic arc-blowout chutes and strictly observe polarity wiring to prevent arc re-ignition.

Modular Accessories & Interlocks

What modular accessories and mechanical interlocks can be fitted to this breaker?

Standard modular clip-on accessories can be mounted directly on the side without tools: OF (Auxiliary Contact for remote status indication), SD (Alarm Contact for trip fault signaling), MX (Shunt Trip for remote emergency tripping), MN (Under-voltage Release for voltage loss protection), and NXBZ mechanical interlock kits for manual generator/mains transfer switches.