CHINT NM7 Series Moulded Case Circuit Breaker 125A-1600A

Name: CHINT NM7 Series Moulded Case Circuit Breaker 125A-1600A
Brand: CHINT
SKU: 60473528548

Brand Name:CHINT
Place of Origin:China
Model Number:NM7
Rated Frequency (Hz):50/60Hz
Breaking Capacity:35kA – 70kA
Rated Voltage:380/400/415/619V
Type:Moulded Case

Poles

Rated Current

SKU: 60473528548 Category: Others

Description

Chint original NM7 Molded Case Circuit Breaker NM7-125 NM7-250 NM7-400 NM7-630 NM7-800 NM7-1600 CHNT Chint NM7 MCCB

After successively developing NM8 and NM6, our company launched another new product, the NM7 series moulded case circuit breaker upgraded from the NM1 series, by further taking the structural features and design style of the NM1 series products, modifying the accessories, wiring mode, appearance and the like in an individualization way,allowing the product not only to be set by the manufacturer before delivery but also replaced by users themselves, which is really an improvement, and integrating the up-to-date design concept to make the product more people-oriented.

Additional information

Weight	2 kg
Dimensions	25 × 25 × 25 cm
Rated Current	16A, 20A, 25A, 32A, 40A, 50A, 63A, 80A, 100A, 125A, 160A, 200A, 250A, 315A, 400A, 500A, 630A, 800A, 1000A, 1250A, 1600A
Poles	3P, 4P

Technical Datasheet & Downloads

📄 Technical Documentation & Product Specifications

Download official engineering datasheets, certified test standards (IEC / UL / CE), wiring diagrams, and dimensional drawings for CHINT NM7 Series Moulded Case Circuit Breaker 125A-1600A.

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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.

Voltage & Load Sizing

How to verify rated operational voltage, frequency, and load duty cycle?

Verify that the nominal line voltage (AC 230V single-phase or 400V/415V/690V three-phase at 50/60Hz, or DC voltage ratings) falls within the continuous maximum operating limits of the device. Check duty cycle ratings (continuous vs intermittent duty) to ensure thermal stability under full load.

Protection & Environment

What ingress protection (IP Rating) and environmental enclosures are recommended?

For clean indoor electrical rooms, standard IP20 modular DIN-rail housings are recommended. For outdoor, industrial washdown, or dusty environments, mount components inside weatherproof enclosures rated IP65/IP66 with UV-resistant polycarbonate or powder-coated steel enclosures equipped with compression cable glands.

Selectivity & Grading

How to ensure upstream and downstream coordination in power distribution boards?

Ensure proper discrimination by grading current thresholds and tripping time delays: upstream devices should have higher current ratings and intentional short-time delays (Class S), allowing downstream branch MCBs to clear localized faults without blacking out the entire facility.

Installation & Mounting

What mounting rails, busbars, and spatial clearances are required?

Components mount on standard symmetrical 35mm DIN rail (EN 60715 / TH35-7.5) or backplate screw fixings. Maintain recommended top/bottom ventilation gaps (typically 30–50mm) to ensure unrestricted air convection, and use standard pin/fork comb busbars to minimize contact resistance and wiring errors.

Conductor & Torque Sizing

What conductor sizes and terminal tightening torques should be applied?

Select copper or aluminum conductor cross-sections complying with IEC 60364-5-52 current-carrying capacity tables based on continuous load. Always use a calibrated torque screwdriver or torque wrench to tighten terminal screws to the manufacturer-specified torque to prevent hot-spot degradation and loose connections.