CHINT NH40 Switch Disconnector

Name: CHINT NH40 Switch Disconnector
Brand: CHINT
SKU: 1600093739376

Whether the smart:NO
Brand Name:Chint
Place of Origin:China
Max. Current:2000A,1250A,1600A
Model Number:NH40
Max. Voltage:690V
Certification:CCC, CE

Poles

Rated Current

Rated Voltage

Description

Chint NH40-1250/3 NH40-1250/4 NH40-1600/3 NH40-1600/4 NH40-2000/3 NH40-2000/4 1250A 1800A 2000A CHNT NH40 Switch Disconnector

Chint NH40 series Switch-disconnector is applicable for AC 50Hz, rated voltage AC 690V and below, DC440V and below, rated current up to 3150A. In the industrial enterprise power distribution equipment,it can be used to connect and disconnect the circuit and isolate the power supply frequently, especially the 125A~630A can be used as frequent connected and broken.

Standard: IEC/EN60947-3.

Additional information

Weight	2 kg
Dimensions	25 × 25 × 25 cm
Poles	3P, 4P
Rated Current	63A, 80A, 100A, 125A, 160A, 200A, 250A, 315A, 400A, 630A, 800A, 1000A, 1250A, 1600A, 2000A, 2500A, 3150A
Rated Voltage	AC 690V

Technical Datasheet & Downloads

📄 Technical Documentation & Product Specifications

Download official engineering datasheets, certified test standards (IEC / UL / CE), wiring diagrams, and dimensional drawings for CHINT NH40 Switch Disconnector.

📥

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

📐

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.