Chint NH40S Manual Changeover Switch MTS

Name: Chint NH40S Manual Changeover Switch MTS
Brand: CHINT
SKU: 1769743274475528192

Whether the smart:NO
Brand Name:Chint
Place of Origin:China
Max. Current:630A
Model Number:NH40S
Max. Voltage:690V
Certification:CCC CE

Poles

Rated Current

Switching Type

Description

Chint CHNT original NH40S NH40-63 NH40-125 NH40-160 NH40-250 NH40-400 NH40-630 NH40-800 NH40-3150 3CS 3SCW 4CS 4CSW Changeover Switch

Chint NH40S Changeover Switch

1.1 Application
Mainly used in the distributing and motor circuit which has high short-circuit current, and acted as main switch or master switch
infrequently operated by hand, it is particularly suitable in the relative high class with drawable low voltage complete equipment.
They provide safety isolation and protection against overcurrent for any low voltage electrical circuit.

1.2 Standard: IEC/EN 60947-3.

1.3 General characteristic
Full-enclosed structure
Unique rolling insert type contact system.

Additional information

Poles	3P, 4P
Rated Current	63A, 80A, 100A, 125A, 160A, 200A, 250A, 315A, 400A, 630A, 800A, 1000A, 1250A, 1600A, 2000A, 2500A, 3150A
Switching Type	Manual (MTS)

Technical Datasheet & Downloads

📄 Technical Documentation & Product Specifications

Download official engineering datasheets, certified test standards (IEC / UL / CE), wiring diagrams, and dimensional drawings for Chint NH40S Manual Changeover Switch MTS.

📥

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.