Chint NS2 Motor Starter

Name: Chint NS2 Motor Starter
Brand: CHINT
SKU: 1770406228384555008

The Chint NS2 Motor Starter (also known as Manual Motor Starter or Guarda Motor) combines motor protection, disconnect switch, and short-circuit protection in a single compact device. Ideal for individual machine protection, conveyor systems, pump stations, and small machinery where local control and protection are needed.

Why Choose NS2 Over Contactor+OLR Combination?

FAQs

A: NS2-25X includes auxiliary contacts for remote status indication, while NS2-25 is the basic version. Choose X version if you need to monitor motor status from a control room.

Description

Chint NS2 Motor Protection Circuit Breaker NS2-25 NS2-32 NS2-25X NS2-32X NS2-80 NS2-80B CHNT Guarda Motor Manual Motor Starter

Chint NS2 Manual Motor Starter

1 Electric ratings: AC690V, 25A, 32A, 80A;

2.1 Certificates: SEMKO, CE, EAC, RCC, UL;

2.2 Standard: IEC/EN 60947-2, IEC60947-4-1

3.1 Temperature: -5℃~+40℃, average temperature in 24 hours not exceed +35℃
3.2 Altitude: not exceed 2000m
3.3 Air conditions:
At mounting site, relative humidity not exceed 50% at the max temperature of +40℃, higher relative humidity is allowable under   lower temperature, for example, RH could be 90% at +20℃
3.4 Pollution grade: Grade Ⅲ
3.5 Trip class:
  10A(NS2-25, NS2-25X, NS2-32, NS2-32X,NS2-32H)
  10 (NS2-80, NS2-80B)
3.6 Rated operational system: Continuous operational system
3.7 Mounting conditions:
  The inclination between the mounting plane and the vertical plane shall not exceed 5°
  The product shall be installed and operated at a place without obvious shake, impact and vibration.

Additional information

Power (kW)	0.75kW, 1.5kW, 2.2kW, 4kW, 5.5kW, 7.5kW, 11kW, 15kW, 18.5kW, 22kW, 30kW, 37kW, 45kW

Technical Datasheet & Downloads

📄 Technical Documentation & Product Specifications

Download official engineering datasheets, certified test standards (IEC / UL / CE), wiring diagrams, and dimensional drawings for Chint NS2 Motor Starter.

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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.

AC-1 / AC-3 Duty

How to calculate contactor rating based on motor power and utilization categories (AC-1 vs AC-3 vs AC-4)?

AC-3 rating applies to standard squirrel-cage motor starting and stopping during normal run (starting current 5–7x In). For non-inductive or purely resistive heating loads, use the higher AC-1 rating. For severe inching, jogging, and plugging applications (AC-4 duty), derate the contactor or upsize by 1 to 2 frame sizes to prevent contact erosion.

Coil Voltage Selection

How to choose the correct control coil voltage, frequency, and electronic wide-voltage options?

Standard AC coils include 24V, 48V, 110V, 220V/230V, 380V at 50/60Hz. For DC control loops or PLC outputs, specify DC coils or electronic wide-range AC/DC coils (e.g. 100V–250V AC/DC) which feature built-in surge suppression, low holding power consumption, and immunity to voltage dips.

Overload Coordination

How to size and coordinate the matching thermal overload relay (TOR) for Type 2 protection?

Select a thermal overload relay whose current setting range straddles the motor full-load current (FLA). Set the dial precisely to 1.0x motor nameplate FLA. For IEC 60947-4-1 Type 2 coordination, pair the contactor and relay with backed-up upstream fuses or fast-acting MCB/MCCB to prevent welding under fault conditions.

Auxiliary & Interlocks

What auxiliary contact blocks and mechanical interlocks can be added for motor reversing?

Units feature built-in 1NO or 1NC auxiliary contacts, expandable with top-mounted 2-pole or 4-pole auxiliary contact blocks (F4 / AX) and pneumatic timer delay blocks. For forward/reverse motor starters or star-delta starter assemblies, add side-mounted mechanical interlock units (MI) with electrical interlocking.

Ambient & Altitude Derating

How do ambient temperature and installation altitude affect contactor performance?

Standard ratings are calibrated for -5°C to +40°C. For ambient temperatures exceeding 55°C or altitudes above 2000m (where reduced air density diminishes heat dissipation and dielectric insulation), derate operational current by 2% per 100m above 2000m and verify insulation voltage limits per IEC standards.